Showing papers in "Bangladesh Journal of Botany in 2013"
TL;DR: Microbial quality of common salad vegetables collected from Dhaka metropolis was analysed to detect the presence of bacterial pathogens and occurrence of viable but non-culturable (VBNC) bacteria was noticed.
Abstract: Microbial quality of common salad vegetables (viz. carrot, cucumber, tomato and lettuce) collected from Dhaka metropolis was analysed to detect the presence of bacterial pathogens. The occurrence of huge numbers of fecal coliforms (1.0×10 4 - 4.09×10 6 cfu/g), Escherichia coli (1.0×10 4 - 5.0×10 8 cfu/g), Staphylococcus aureus (2.0×10 5 - 5.95×10 7 cfu/g), and Listeria spp. (1.5×10 6 - 6.5×10 7 cfu/g) were detected in all the tested samples. Interestingly, occurrence of viable but non-culturable (VBNC) bacteria was also noticed.
73 citations
TL;DR: Plant parameters such as plant height, branch and leaf number, leaf area/plant, total dry mass, photosynthesis, harvest index, chlorophyll, nitrate reductase and number of pods/plant increased significantly with the increasing concentration of chitosan up to 50 ppm, which resulted the highest seed yield in mungbean.
Abstract: Plant parameters such as plant height, branch and leaf number/plant, leaf area/plant, total dry mass/plant, photosynthesis, harvest index, chlorophyll, nitrate reductase and number of pods/plant increased significantly with the increasing concentration of chitosan up to 50 ppm. It resulted the highest seed yield in mungbean. DOI: http://dx.doi.org/10.3329/bjb.v42i1.15910 Bangladesh J. Bot. 42 (1): 179-183, 2013 (June)
37 citations
TL;DR: Nine traits of 11 cherry tomato inbred lines exhibited a wide range of genetic variability indicating that improvement of high yield through selection is difficult, rather hybridization can be effective for improving the fruit yield/plant.
Abstract: Nine traits of 11 cherry tomato ( Solanum lycopersicum L.) var. cerasiforme (Dunal) A. Gray) inbred lines exhibited a wide range of genetic variability. High geno- and phenotypic coefficients of variation were obtained for individual fruit weight (68.16 and 74.23%, respectively) followed by number of fruits/plant (58.8 and 68.34%, respectively). High estimates of heritability, genetic advance and genotypic coefficient of variation for the traits of individual fruit weight, number of fruits and clusters/plant were controlled by additive gene action indicating the possibility of selection to improve these characters. Fruit yield/plant showed low heritability along with low genetic advance and did not show significant and positive correlation with the remaining characters. It indicates that improvement of high yield through selection is difficult, rather hybridization can be effective for improving the fruit yield/plant. Among the lines, CH154 produced the highest number of fruits/plant (291) and highest fruit yield (1.89 kg/plant and 63.4 t/ha) and can be selected for cultivation under Bangladesh condition. DOI: http://dx.doi.org/10.3329/bjb.v41i2.13443 Bangladesh J. Bot. 41 (2): 163-167, 2012 (December)
24 citations
TL;DR: In this article, the effects of high temperature and chromium (VI) and copper (Cu) on wheat (Triticum aestivum L. cv. Dagdas 94) seedlings were investigated.
Abstract: Effects of interactions between high temperature and chromium (Cr(VI)) and copper (Cu) on wheat ( Triticum aestivum L. cv. Dagdas 94) seedlings were investigated. High concentrations of Cr and Cu at 40°C decreased the root and shoot length and dry weight. The total chlorophyll content was decreased at 30 ?M Cr + 40°C. At the high Cr and Cu concentrations, carotenoid content was increased compared to that of control groups. Heavy metal treatment increased proline content but decreased that of soluble protein. In addition, chromium showed greater toxic effects on growth and biochemical parameters than that of Cu. DOI: http://dx.doi.org/10.3329/bjb.v42i1.15871 Bangladesh J. Bot. 42 (1): 105-111, 2013 (June)
22 citations
TL;DR: In this paper, the genotype-environment interaction and stability performance were investigated on amylase, protein and grain yield with 13 hybrid rice promising combinations in five environments, and the combined ANOVA showed that the mean sum of square due to genotype (G), environment (E) and G × E interaction were significant for amylose content, protein content and grain yields.
Abstract: Genotype-environment interaction and stability performance were investigated on amylase, protein and grain yield with 13 hybrid rice promising combinations in five environments. The combined ANOVA showed that the mean sum of square due to genotype (G), environment (E) and G × E interaction were significant for amylose content, protein content and grain yield. This suggests a number of variabilities among the genotypes and environments as and the indicated genotypes interacted significantly with environments. The Additive Main Effects and Multiplicative Interaction (AMMI) biplot for yield clearly indicated that the hybrids BR10A/BR12R, II32A/BR15R, II32A/BR16R, II32A/BR10R, BR9A/BR15R, BRRI hybrid dhan2 and BRRI hybrid dhan3 were high yielding, stable and had general adaptability at all locations. The AMMI estimation had a profound effect in producing sharp and stratified ranking patterns and on this basis BRRI hybrid dhan2 would be considered more adapted to a wide range of environments than the rest of the genotypes. The biplot technique was used to identify appropriate genotype to special locations. This consideration on the basis of average yield for specific genotype to the specific location. The hybrid combination II32A/BR12R was more suitable for Gazipur location and the hybrid combination BR10A/BR13R was considered for Comilla region. Barisal was more stable site than other location for grain yield due to IPCA score near zero which had no interaction effect.
15 citations
TL;DR: In this paper, the effect of waterlogging on ion transport, accumulation of metabolites and dry weight of jute plants was discussed, and it was shown that it increased the accumulation of sugar and proline contents but decreased protein as well as dry weight.
Abstract: Waterlogging decreased accumulation of K + , Ca 2+ , Mg 2+ , NO 3 - and PO 4 3- but increased that of Na + and Fe 2+ in the root, stem and leaves of jute ( Corchorus capsularis L.) . It increased the accumulation of sugar and proline contents but decreased that of protein as well as dry weight. The effect of waterlogging on ion transport, accumulation of metabolites and dry weight was discussed. DOI: http://dx.doi.org/10.3329/bjb.v42i1.15864 Bangladesh J. Bot. 42 (1): 55-63, 2013 (June)
14 citations
TL;DR: Under low saline conditions, maximum plant growth was obtained from plants treated with aspartic acid and 8% of sea water, followed by 4%.
Abstract: Tomato plants ( Lycopersicon esculentum Mill.) treated with 8 and 16% of sea water reduced growth parameters and chemical constituents. Both aspartic acid and glutathione increased plant growth, anthocyanin, ?-tocopherol, ascorbic acid and enzymatic activities. Increased endogenous amino acids led to positive changes in protein electrophoresis and caused obvious changes in anatomical features of the stems. The effect of aspartic acid was superior to that of glutathione in increasing plant growth. Under low saline conditions, maximum plant growth was obtained from plants treated with aspartic acid and 8% of sea water, followed by 4%. Data revealed that antioxidants could partially alleviate the harmful effects of salinity. DOI: http://dx.doi.org/10.3329/bjb.v42i1.15822 Bangladesh J. Bot. 42 (1): 31-43, 2013 (June)
13 citations
TL;DR: Water quality and phytoplankton diversity were investigated in Gopeswar temple pond of Assam, India and presence of Microcystis aeruginosa along with Navicula cryptocephala throughout the year indicated its cultural eutrophication and hence, needs management intervention.
Abstract: Water quality and phytoplankton diversity were investigated in Gopeswar temple pond of Assam, India. Altogether 45 species of phytoplankton were recorded representing Chlorophyceae (16), Cyanophyceae (10), Bacillariophyceae (14), Euglenophyceae (3), Chrysophyceae (1) and Dinophyceae (1). Phytoplankton peaks were observed in summer and monsoon periods. Correlations of phytoplankton density with different water quality parameters were evaluated and the water body was found to be moderately polluted. Presence of Microcystis aeruginosa along with Navicula cryptocephala throughout the year also indicated its cultural eutrophication and hence, needs management intervention DOI: http://dx.doi.org/10.3329/bjb.v41i2.13446 Bangladesh J. Bot. 41 (2): 181-185, 2012 (December)
12 citations
TL;DR: Tetracycline and ampicillin resistant bacteria were identified from both fresh and brackish water shrimp farming system, in Bangladesh, among 78 isolates found resistant to TC, AMP and TC plus AMP, respectively.
Abstract: Tetracycline (TC) and ampicillin (AMP) resistant bacteria were identified from both fresh and brackish water shrimp farming system, in Bangladesh. Among 78 isolates from freshwater samples, 14.10, 17.95 and 23.8% were found resistant to TC, AMP and TC plus AMP, respectively. On the other hand, isolates from the brackish water samples, the percentages of TC, AMP and TC plus AMP resistant isolates were 10.25, 12.82 and 15.38, respectively. In freshwater samples, the highest percentage of resistant bacteria was Bacillus sp. (38.9), Pseudomonas sp. (22.2), Staphylococcus sp. (16.7), Acinetobacter sp. (11.1), Brevibacillus sp. (5.5) and Enterobacter sp. (5.5). While in brackish water samples dominant resistant bacteria was Bacillus sp. (50) followed by Pseudomonas sp. (16.7), Acinetobacter sp. (16.7), Enterobacter sp. (8.3) and Microvirgula sp. (8.3). DOI: http://dx.doi.org/10.3329/bjb.v41i2.13449 Bangladesh J. Bot. 41 (2): 197-200, 2012 (December)
12 citations
TL;DR: Wide variability was observed for all the characters among 110 lentil accessions, and among the characters, flower colour showed the highest variation.
Abstract: Wide variability was observed for all the characters among 110 lentil accessions. Stem colour varied from normal green (45%) to purple (55%). Prominent and rudimentary tendrils were found in 60% and 40% of the accessions, respectively. Among the characters, flower colour showed the highest variation. White flower colour was observed in 49%, violet in 28%, white with blue veins in 20% accessions and the rest 3% were with blue flowers. Red cotyledon was shown by 90% while with yellow was shown by 10% of the accessions. Green, grey and brown seed coat was observed in 10, 66 and 24% of the accessions, respectively. Seed coat pattern with dots was found in 70% accessions and marbled seed coat pattern was shown by 15.5% while 14.5% did not show any seed coat pattern. DOI: http://dx.doi.org/10.3329/bjb.v41i2.13447 Bangladesh J. Bot. 41 (2): 187-190, 2012 (December)
12 citations
TL;DR: These types of SSR markers were very much useful for identification of true hybrid seedlings in the early stage of growth and genotyping of the progenies more accurately for gene mapping.
Abstract: For the maping of Cassava mosaic disease (CMD) resistance gene, CO2 and MNga-1 parents were used for hybridization to develop F 1 hybrid seeds and 153 progenies were planted in the field for genotyping. Out of the 75 SSR primers used for parental polymorphism, 57 produced polymorphic bands between parents and these were used to screen the 153 progenies of the cross for genotyping. Out of these 57 SSR primer pairs SSRY32, SSRY36, SSRY83, SSRY339, NS149 and NS890 loci produced single marker which clearly distinguished the parents. Based on the said six primers, 12 progenies out of 153 were identified as self pollinated seeds of CO2 female parent. So these types of SSR markers were very much useful for identification of true hybrid seedlings in the early stage of growth and genotyping of the progenies more accurately for gene mapping. DOI: http://dx.doi.org/10.3329/bjb.v42i1.15906 Bangladesh J. Bot. 42 (1): 155-159, 2013 (June)
TL;DR: The presence of the semi-permeable layer was determined in Roegneria nutans (Keng), Achnatherum inebrians (Hance.) Keng, Hordeum vulgare var.
Abstract: The presence of the semi-permeable layer is determined in Roegneria nutans (Keng.) Keng, Achnatherum inebrians (Hance.) Keng, Hordeum vulgare var. nudum Hook. f., Triticale , Festuca sinensis Keng., and Bromus inermis Leyss. using the lanthanum nitrate tracer method, transmission electron microscopy and energy dispersive X-ray analysis. It was an amorphous membranous structure firmly attached on the external portion of the seed coat. The diversified chemical composition of the semi-permeable layer of the species studied is also analyzed by histochemical staining. R. nutans , A. inebrians , H. vulgare var. nudum , and Triticale were found to contain lipids in the semi-permeable layer. F . sinensis had pectin whereas B. inermis has cellulose in the said layer. DOI: http://dx.doi.org/10.3329/bjb.v42i1.15802 Bangladesh J. Bot. 42 (1): 23-29, 2013 (June)
TL;DR: Best rooting was obtained from shoots cultured on half-strength of MS fortified with 4.0 mg/l IBA, and the regenerated plantlets were successfully transferred to potted soil.
Abstract: A large number of shoots regenerated from lateral buds and young leaves of Carica papaya L. cv. Shahi on MS supplemented with 1.0 mg/l zeatin and 0.2 mg/l NAA. Addition of 200 mg/l casein hydrolysate (CH) to the medium increased the number of shoots per culture and incorporation of 2.0 g/l activated charcoal (AC) to the medium resulted effective shoot growth with healthy leaf. While addition of 100 mg/l urea and 2.0 g/l activated charcoal to the medium showed proper shoot elongation. Best rooting was obtained from shoots cultured on half-strength of MS fortified with 4.0 mg/l IBA.Within four weeks of transfer to the rooting medium, 90% microcuttings produced 12 - 14 roots. The regenerated plantlets were successfully transferred to potted soil. About 84% plantlets survived in the experimental field. DOI: http://dx.doi.org/10.3329/bjb.v41i2.13448 Bangladesh J. Bot. 41 (2): 191-195, 2012 (December)
TL;DR: The present study shows the application of morphometric analysis for understanding the phenetic relationships among the species of Desmodium and UPGMA dendrogram is constructed based on cluster analysis which reveals two major clusters.
Abstract: Phenetic analysis based on morphological characters is presented for 14 species of Desmodium Desv. in Bangladesh . This study examines patterns of morphological similarity and variation within Desmodium using 36 floral and vegetative characters. D. heterophyllum shows highest similarity with D. triflorum among the species employed . UPGMA dendrogram is constructed based on cluster analysis which reveals two major clusters, the first of which consists of seven species while the second cluster comprises six species, and D. microphyllum is found far from all other species. The presence of winged petioles distinguishes D. alatum and D. auriculatum from the other species. The present study shows the application of morphometric analysis for understanding the phenetic relationships among the species of Desmodium. DOI: http://dx.doi.org/10.3329/bjb.v41i2.13438 Bangladesh J. Bot. 41 (2): 143-148, 2012 (December)
TL;DR: Five different doses of NPK fertilizers were applied and the growth, yield and yield attributes of okra were studied and the length of main stem, number of nodes and leaves were maximum at T 1.
Abstract: Five different doses of NPK fertilizers, viz. T o (0N0P0K), T 1 (1N1P1K), T 2 (0N1P1K), T 3 (1N0P1K) and T 4 (1N1P0K) were applied and the growth, yield and yield attributes of okra were studied. The length of main stem, number of nodes and leaves were maximum at T 1 . The fresh weight, length, circumference, diameter per fruit and yield per plant were the highest at T 1 . The carotenoid content of leaves and vitamin C contents of fruits were maximum at T 1 . The total NPK concentration of both plants and fruits were the highest at T 3 . DOI: http://dx.doi.org/10.3329/bjb.v41i2.13436 Bangladesh J. Bot. 41 (2): 131-134, 2012 (December)
TL;DR: The interrelationship between the effect of salinity and growth regulators on seed germination and the accumulation of Na+ and K + in the seedlings is discussed.
Abstract: Effects of GA and Kn on seed germination and accumulation of Na + and K + in the seedlings of Triticale cultivar was investigated under salinity stress. Salinity decreased the rate of seed germination and ion accumulation in the seedlings but both GA and Kn stimulated these processes under stress. Salinity increased the accumulation of Na + in radicles and plumules with concomitant inhibition of that of K + , GA and Kn, on the other hand, reduced the rate of Na + accumulation and increased that of K + in the seedlings. The interrelationship between the effect of salinity and growth regulators on seed germination and the accumulation of Na+ and K + in the seedlings is discussed. DOI: http://dx.doi.org/10.3329/bjb.v41i2.13435 Bangladesh J. Bot. 41 (2): 123-129, 2012 (December)
TL;DR: The presence or absence of trichome, cortex parenchyma layer, sclerenchyma, mesophyll structure and epidermal surface were found to be important characters for the identification of Ricotia species.
Abstract: The present paper deals with a comparative anatomy of stem and leaf of Ricotia species growing in Turkey. In addition, stomatal index and rate of these species were calculated. A diagnostic key based on combined stem, leaf and leaf epidermal characteristics were presented. The presence or absence of trichome, cortex parenchyma layer, sclerenchyma, mesophyll structure and epidermal surface were found to be important characters for the identification of Ricotia species. DOI: http://dx.doi.org/10.3329/bjb.v42i1.15875 Bangladesh J. Bot. 42 (1): 123-130, 2013 (June)
TL;DR: Three isolates produced significant symptoms on D. sissoo seedlings after mechanical inoculation in vivo, suggesting that Pseudomonas should be considered as a potential cause for the dieback disease.
Abstract: The possible role of bacteria as pathogens in dieback affected Dalbergia sissoo Roxb. (sissoo) trees in Bangladesh has been investigated. Among the high diversity of bacterial genera detected by 16S rDNA sequences, several plant pathogenic Pseudomonas strains were identified and classified by AFLP analysis. Three isolates produced significant symptoms on D. sissoo seedlings after mechanical inoculation in vivo , suggesting that Pseudomonas should be considered as a potential cause for the dieback disease. DOI: http://dx.doi.org/10.3329/bjb.v42i1.15710 Bangladesh J. Bot. 42 (1): 1-16, 2013 (June)
TL;DR: The findings of this study indicate the taxonomic implications of pollen morphology in understanding the similarity and relationships in the genus Oxytropis.
Abstract: Pollen morphology of 11 species of the genus Oxytropis DC. (Fabaceae) distributed in Turkey were examined with light (LM) and scanning electron microscope (SEM). Morphology of pollen grains shows isopolar, radially symmetric, tricolporate, prolate or subprolate, porus shape oblate or operculate and exine subtectate. The size varies with the polar axis from 19.52 - 33.31 μm and the equatorial axis from 13.50 - 25.82 μm. There are five ornamentation types: perforate at equatorial section and psilate at polar sections, microreticulate at equatorial sections and psilate at polar sections, microreticulate at equatorial sections and perforate at polar sections, microreticulate at both equatorial and polar sections and perforate at both equatorial and polar sections. Pollen aperture, shape and especially different ornamentation patterns at polar and equatorial section of pollen, as found in this study, appear to be important character. The findings of this study indicate the taxonomic implications of pollen morphology in understanding the similarity and relationships in the genus Oxytropis. DOI: http://dx.doi.org/10.3329/bjb.v42i1.15908 Bangladesh J. Bot. 42 (1): 167-174, 2013 (June)
TL;DR: In this article, the β-sitosterol was isolated by silica gel column chromatography from the dichloromethane soluble extract of pericarp of Corypha taliera Roxb.
Abstract: β-sitosterol was isolated by silica gel column chromatography from the dichloromethane soluble extract of pericarp of Corypha taliera Roxb. (Talipalm), a rare species of Arecaceae family. The compound was characterized by IR, 1 H and 13 C NMR spectroscopic studies. Fatty acid compositions of oil of the pericarp was determined as their methyl esters and identified by gas chromatography having flame ionization and the gas chromatograph was coupled to mass spectroscopic detectors. Myristic, palmitic, oleic, linoleic, stearic, arachidic and lignoceric acids were found to be present in the oil. The palmitic acid was predominant (50.75%) in the oil. The relative percentage of unsaturated acid i.e., linoleic and oleic acids was found to be 15.58 and 20.89%, respectively. DOI: http://dx.doi.org/10.3329/bjb.v42i1.15824 Bangladesh J. Bot. 42 (1): 51-53, 2013 (June)
TL;DR: In this article, the dynamics of phytoplankton primary productivity were determined in a eutrophic water body of Dhaka Metropolis fortnightly for one year and the mean value of daily rate of primary productivity was 10.05 gC/m 2 /d and annual sum of primary output was estimated 3669.5 gC /m 2/y.
Abstract: Dynamics of phytoplankton primary productivity were determined in a eutrophic water body of Dhaka Metropolis fortnightly for one year. The mean value of daily rate of primary productivity was 10.05 gC/m 2 /d and annual sum of primary productivity was estimated 3669.5 gC/m 2 /y. The yearly mean value of conductivity, pH, alkalinity, SRP and SRS were 486.66 μS/cm, 7.21, 4.02 meq/l, 0.75 mg/l and 49.75 mg/l, respectively which indicated the intensity of contamination from the catchment. Significant correlations were obtained among the variables (day length, irradiance, water temperature and DO) relating to primary productivity. “Green soup” like algal bloom was found to occur on most occasions. The productivity was confined to the upper few centimeter depth of the water indicating a typical eutrophic nature of the water body. DOI: http://dx.doi.org/10.3329/bjb.v41i2.13437 Bangladesh J. Bot. 41 (2): 135-142, 2012 (December)
TL;DR: Dendogram based on Nei’s genetic distance using Unweighted Pair Group Method of Arithmetic Means (UPGMA) has segregated the 13 mungbean cultivars into two major clusters, indicating the presence of wide genetic diversity.
Abstract: Genetic diversity analysis among 13 mungbean cultivars from Bangladesh was performed through polymerase chain reaction (PCR) based random amplification of polymorphic DNA (RAPD). Out of 20 arbitrary decamer oligonucleotide primers used, 10 produced a total of 379 different bands with an average of 37.9 bands per primer. Based on the observed banding pattern all the primers were found to be 100% polymorphic. Band size of the amplicons ranged from 250 - 5000 bp. A total of 10 unique DNA fragments was amplified from the 13 mungbean cultivars genome. The values of pair-wise genetic distances ranged from 0.0700 - 1.0852, indicating the presence of wide genetic diversity. The highest genetic distance (1.0852) was found between cultivar BARI Mung-2 and 6 while the lowest (0.0700) between cultivar BINA Mung-2 and 7. Dendogram based on Nei’s genetic distance using Unweighted Pair Group Method of Arithmetic Means (UPGMA) has segregated the 13 mungbean cultivars into two major clusters. BARI Mung-1, 2, 3, 4 and 5 formed cluster 1 and BARI Mung-6, BINA Mung-1, 2, 7, 6, 4, 5 and 8 have made cluster 2. DOI: http://dx.doi.org/10.3329/bjb.v41i2.13444 Bangladesh J. Bot. 41 (2): 169-175, 2012 (December)
TL;DR: Lilium candidum bulb scales were cultured on MS containing different doses and combinations of NAA, BA, Kn and 2iP and maximum bulblet formation was 88.2% in MS supplemented with 0.1 mg/l NAA.
Abstract: Lilium candidum bulb scales were cultured on MS containing different doses and combinations of NAA, BA, Kn and 2iP. Maximum bulblet formation was 88.2% in MS supplemented with 0.1 mg/l NAA + 0.01 mg/l BA and the average number of bulblets per explant was 2.9. DOI: http://dx.doi.org/10.3329/bjb.v42i1.15913 Bangladesh J. Bot. 42 (1): 185-187, 2013 (June)
TL;DR: Didymodon tomaculosus (Blockeel) M.V.Corley is reported for the first time from Turkey, bringing the total number of Didy modon species known from Turkey to 19.
Abstract: Didymodon tomaculosus (Blockeel) M.F.V.Corley is reported for the first time from Turkey, bringing the total number of Didymodon species known from Turkey to 19. D. tomaculosus is also reported first time to the moss flora of Asia. It is a very rare species and was known only from British Isles and south of Germany. Description, illustrations and diagnostic characters of the species are given, together with notes on its ecology. DOI: http://dx.doi.org/10.3329/bjb.v41i2.13445 Bangladesh J. Bot. 41 (2): 177-179, 2012 (December)
TL;DR: Data obtained revealed that the growth, yield and protein content of cowpea were stimulated by 10% aqueous extract of M. parviflora and the mixture of 10% Malva with 20% Artemisia and the soil fertility was improved.
Abstract: Aqueous plant extracts of Malva parviflora L. and Artemisia ludia L. were tested in the field on cowpea ( Vigna unguiculata (L.) Walp.) plants. The extracts were added alone and in combination. The treatments were applied just one day before irrigation. Data obtained revealed that the growth, yield and protein content of cowpea were stimulated by 10% aqueous extract of M. parviflora and the mixture of 10% Malva with 20% Artemisia. The data also showed that the soil fertility was improved. DOI: http://dx.doi.org/10.3329/bjb.v42i1.15870 Bangladesh J. Bot. 42 (1): 99-104, 2013 (June)
TL;DR: Three tomato varieties released from Bangladesh Agriculture Research Institute (BARI) were characterized by karyotype analysis and RAPD markers and each of the varieties showed specific and unique RAPD fingerprinting.
Abstract: Three tomato varieties ( Lycopersicon esculentum Mill.) viz. BARI tomato-11, BARI tomato-2 and BARI tomato-3 released from Bangladesh Agriculture Research Institute (BARI) were characterized by karyotype analysis and RAPD markers. BARI tomato-11 and BARI tomato-2 were found to possess 2n = 24 metacentric chromosomes. On the other hand, 2n = 25 metacentric chromosomes were observed in BARI tomato-3 revealing a trisomic variety. The karyotype of the three varieties was very symmetric and each of the varieties showed specific and unique RAPD fingerprinting. Therefore, based on karyotype and RAPD analysis the three tomato varieties could be characterized. DOI: http://dx.doi.org/10.3329/bjb.v41i2.13439 Bangladesh J. Bot. 41 (2): 149-154, 2012 (December)
TL;DR: Effects of growth regulators on seed germination, seedling growth and some aspects of metabolism of wheat under allelochemical stress due to oleander and walnut leaf (extract and powder) were investigated.
Abstract: Effects of growth regulators on seed germination, seedling growth and some aspects of metabolism of wheat under allelochemical stress due to oleander and walnut leaf (extract and powder) were investigated. All parameters e.g. seed germination, seedling growth, leaf pigments except the proline content reduced significantly under stress. On the contrary, GA 3 and IBA showed alleviating activities. The alleviation effect of GA 3 was higher than that of IBA . DOI: http://dx.doi.org/10.3329/bjb.v42i1.15865 Bangladesh J. Bot. 42 (1): 65-71, 2013 (June)
TL;DR: It appears that reticulate lacunas in common petiole of M. pudica are responsible for its strong nastic movement, where the main sensitivity position lies at the base of commonPetiole,Where the lower cortex is more sensitive than the upper cortex, and the ordinal sensitivity positions are rachis and leaflets.
Abstract: In order to study the adaptive anatomical structures during nastic movement of Mimosa pudica L., anatomical structures of main pulvinus, common petioles, rachis and leaflets were compared with Albizia julibrissin Durazz. (taken as control). The anatomical structures of main pulvinus and common petiole of M. pudica were different from that of A. julibrissin . Upon stimuliti, the protoplast volume of M. pudica in the lower cortical parenchyma cells become smaller than that in upper ones, a feature seldom found in A. julibrissin . There were found many reticulate lacunas on the two side of adaxial petiole of M. pudica , but nil in A. julibrissin . Similarly some ill developed lacunas were found in the pulvinus of rachis and leaflet of M. pudica , but absent in A. julibrissin . It appears that reticulate lacunas in common petiole of M. pudica are responsible for its strong nastic movement. The main sensitivity position lies at the base of common petiole, where the lower cortex is more sensitive than the upper cortex, and the ordinal sensitivity positions are rachis and leaflets. DOI: http://dx.doi.org/10.3329/bjb.v42i1.15876 Bangladesh J. Bot. 42 (1): 131-137, 2013 (June)
TL;DR: In Aspergillus flavus Link, the total lipid, sterols, neutral lipids, phospholipids and fatty acid content decreased significantly with the application of different concentrations of Ephedra alata Decne.
Abstract: In Aspergillus flavus Link, the total lipid, sterols, neutral lipids, phospholipids and fatty acid content decreased significantly with the application of different concentrations of Ephedra alata Decne. extrtact. Gas chromatographic analysis revealed the presence of 12 fatty acids namely, (caprylic (C8), capric (C10), lauric (C12), myristic (C14), palmitic (C16), palmitoleic (C16:1), stearic (C18), oleic (C18:1), linoleic (C18:2), α linolenic (C18:3), arachidic (C20) and arachidonic (C20:4) with total un-saturation per cent 69.78 in the cellular lipids of A. flavus. The use of E. alata extracts induced significant alteration in fatty acid profile towards increment saturation.
TL;DR: In response to population density, the plasticity of stem allocation is “true” plasticity, while the value of thestem allocation is consistent because of the trade off between the effects of plant size and population density.
Abstract: Biomass allocation was size-dependent. Under soil nutrient, the plasticity of the leaf and reproductive allocation was “true” plasticity, the plasticity of stem allocation was “apparent” plasticity, which is dependent on plant size, but there was no plasticity in root allocation. Under soil water stress, the plasticity of root, leaf and reproductive allocation was “true”. In response to population density, the plasticity of stem allocation is “true” plasticity, while the value of the stem allocation is consistent because of the trade off between the effects of plant size and population density. The biomass allocation strategy increases reproductive allocation but decrease leaf allocation with the decrease of soil nutrient, when compared at the same plant size. At lower soil water, the plant allocated more biomass to the root and leaf rather than to reproductive organ. DOI: http://dx.doi.org/10.3329/bjb.v42i1.15873 Bangladesh J. Bot. 42 (1): 113-121, 2013 (June)