Showing papers by "Annamalai University published in 1970"
TL;DR: A series of developmental stages has been characterized, using various morphological features, of the garden lizard, Calotes versicolor, in order to make use of this lizard's embryos for experimental work.
Abstract: It has been shown that the external parameters of eggs of the garden lizard, Calotes versicolor, are not suitable for assessing the exact developmental stages of embryos. In order to make use of this lizard's embryos for experimental work, a series of developmental stages has been characterized, using various morphological features.
93 citations
TL;DR: The F1 hybrid resembled the wild parent and exhibited hybrid vigour and was partly sterile with 48.9% stainable pollen, but was classified as a segmental allopolyploid.
Abstract: The F1 hybrid (S. indicum ×S. melongena) resembled the wild parent and exhibited hybrid vigour. In spite of normal meiosis, it was partly sterile with 48.9% stainable pollen. Its sterility is attributed to cryptic structural hybridity.
28 citations
TL;DR: In this paper, the potential energy constants of IF 5, IOF 5 and IF 7 have been calculated using a Urey-Bradley force field taking into account the presence of the lone pair of electrons.
14 citations
TL;DR: In this article, the authors determined the rate of change of bond moment with bond distance, dμ/d r, for some free and H-bonded C�O bonds from infrared intensity measurements.
13 citations
Journal Article•
TL;DR: In this article, the seasonal quantitative distributions of the species of the living benthic foraminifera forming the greater part of the foraminiferal population in the Vellar estuary, South India have been studied.
Abstract: Seasonal quantitative distributions of the species of the living benthic foraminifera forming the greater part of the foraminiferal population in the Vellar estuary, South India have been studied. Recorded physico-chemical factors have played an important role in controlling the relative abundances of this microfauna. Estuarine foraminiferal assemblage in general shows a quantitative increase with increasingly marine conditions.
9 citations
TL;DR: The results suggest that red tide outbreaks in tropical oceans may be caused by growth promoting substances, including inorganic phosphate and nitrate.
Abstract: In laboratory cultures, increased growth of Trichodesmium erythraeum was induced by the addition of gibberellic acid (GA). Addition of 2.0 mg/l GA to basal medium increased the initial concentration of 62 to 68 cells/10 ml to 450 to 950 cells/10 ml in 7 days, while no cell division occurred in control cultures. Addition of inorganic phosphate and nitrate have very little growth promoting effects; during a period of 7 days, the initial concentration of 62 cells/10 ml increased to only 74 to 80 cells/10 ml. These results suggest that red tide outbreaks in tropical oceans may be caused by growth promoting substances.
9 citations
TL;DR: The potential energy constants of seleninyl fluoride and selenonyl fluoride were calculated using a Urey-Bradley force field and taking into account the presence of the lone pair of electrons.
8 citations
TL;DR: A phenotypic and molecular diversity study was conducted using seven traits and 19 SSR markers in a collection of 26 black gram genotypes and showed four apparent clusters based on marker allele distribution between genotypes.
Abstract: A phenotypic and molecular diversity study was conducted using seven traits and 19 SSR markers in a collection of 26 black gram genotypes. Phenotypic characterization was based on seven yield and yield related variable. The field experiment was laid out at Panboli village (YMV hotspot) of Tirunelveli District in Tamilnadu during summer 2017. Genetic divergence was estimated on the basis of D2values and 26 genotypes under study were grouped into six clusters by Tocher’s method. Seed yield per plant followed by Plant height and number of pods per plant contributed to the genetic divergence. The genetic distance announced using DICE dissimilarity co-efficient indicated highest divergence of 1.0 between VBN 8 and AUBG 17 and between VBN 8 and AUBG 19. The dendogram constructed using the DICE dissimilarity co-efficient between genotypes showed four apparent clusters based on marker allele distribution. Divergence was noted between the dissimilarity matrices based on the molecular and phenotypic diversity based on agronomic data.
5 citations
TL;DR: In this paper, the integrated organic fertilizers were used to estimate the growth and yield of pearl millet, and the experiments were laid out in randomized block design (RBD) and replicated thrice.
Abstract: In the present study, the integrated organic fertilizers were used to estimate the growth and yield of pearl millet. The treatments consisted of application of increased levels of recommended dose of fertilizer with organic manures for pearl millet. The treatments were; T1-100% RDF, T2-125% RDF, T3-75% RDF, T4-100% RDF+FYM @ 12.5 t ha-1, T5-100% RDF+Poultrymanure@5tha,T6-100 % RDF+Vermicompost @ 5 t ha-1, T7-100 % RDF+Pressmud@5tha-1, T8-125% RDF+Poultry manure @ 5 t ha-1, T9-125 % RDF+Vermicompost @ 5 t ha-1, T10-125 % RDF+Pressmud @ 5 t ha-1, T11-75% RDF+Poultry manure @ 5 t ha-1, T12-75 % RDF+Vermicompost @ 5 t ha-1 and T13-75 % RDF+Pressmud @ 5 t ha-1. The experiments were laid out in randomized block design (RBD) and replicated thrice. The result of the experiment revealed that the application of 125% recommended dose of fertilizer+vermicompost@5tha(T9), significantly increased the growth, yield, quality and nutrient uptake of pearl millet followed by, T10 (125% recommended dose of fertilizer+Pressmud @ 5 t ha-1) respectively.
5 citations
TL;DR: The kharif season 2017 indicated that per cent shoot damage and fruit damage of bhendi was positively non significant association with RH and rain fall, while negatively non significant correlation with minimum temperature and sunshine hours was recorded.
Abstract: The field experiments were carried out in the farmer field at C. Mutlur near Chidambaram during rabi and kharif 2017. The results of experiments revealed that the per cent shoot damage and fruit damage by E. vittella on bhendi reached peak on 13th and 15th MSW in rabi season, whereas 43rd and 42nd MSW in kharif season. The per cent shoot damage and fruit damage by E. vittella were exerted significantly positively correlated with minimum (0.552 and 0.698) and maximum temperature (0.629 and 0.748), whereas rainfall positively correlated with per cent shoot and fruit damage but it was non significant (0.111 and 0.297), however relative humidity (-0.178 and-0.210) and sunshine hours were exerted negatively correlated with per cent shoot damage and fruit damage by E. vittella during rabi 2017. The kharif season 2017 indicated that per cent shoot damage and fruit damage of bhendi was positively non significant association with RH and rain fall, while negatively non significant correlation with minimum temperature (-0.43 and-0.309) and sunshine hours (-0.265 and-0.283) was recorded.
3 citations
TL;DR: Heterosis breeding is one of the most efficient tools to exploit the heterotic response for various useful traits and some of the promising hybrids have showed desirable heterosis for plant height, number of fruits per plant,1000 seed weight, seedling shoot length, Seedling root length and seedling dry weight.
Abstract: Heterosis breeding is one of the most efficient tools to exploit the heterotic response for various useful traits. The Line × Tester mating design was undertaken with seven lines and three testers were evaluated along with twenty one hybrids in randomized block design to estimate the magnitude of heterosis for yield and its yield contributing characters. The best way to utilize heterosis in crop is to generate F1 hybrids having maximum heterozygosity, thereby facilitating the identification and selection of hybrid vigor. The positive significant standard heterosis for fruit yield per plant was maximum with L3 × T1 (28.94%) followed by L7 × T3 (15.73%) and L7 × T1 (15.10%) respectively. Some of the promising hybrids have showed desirable heterosis for plant height, number of fruits per plant,1000 seed weight, seedling shoot length, seedling root length and seedling dry weight.
TL;DR: All the parameters except days to first blooming show a dose dependent decrease in both treatments and the LD-50 value was found in 30 mmol of EMS and 40 mmol of DES.
Abstract: The present study was carried out to induce chemical mutagens in Finger millet (Eleusine coracana (L.) Gaertn.). The seed were subjected to different treatment level of EMS and DES. The parameters like Plant height(cm), Number of leaves per plant, Leaf length (cm/plant), Number of finger per plant, Finger length (cm/plant), Days to first bloom, Yield per plant (g) and 1000 grains weight (g)were observed in M1generation. And the result revealed that, all the parameters except days to first blooming show a dose dependent decrease in both treatments. The LD-50 value was found in 30 mmol of EMS and 40 mmol of DES.
01 Jan 1970
TL;DR: In this paper, the effect of different concentrations of chromium on the growth and yield of black gram seeds with different concentrations (5, 10, 25, 50, 100 and 200 mg/l) was investigated.
Abstract: This study was conducted to find out the effect of different concentrations (control 5, 10, 25, 50, 100 and 200 mg/l) of chromium on growth, yield of black gram (Vigna mungo L.). Pot culture experiments were carried out with black gram seeds with different concentrations of chromium solution. The morphological growth parameters were recorded at 15, 30, 45 and 60 d old chromium treated plants. The yield was recorded at the time of harvest. The study revealed that, the increase in chromium reduce the growth and yield in black gram plants.
01 Jan 1970
TL;DR: In this article, a field investigation was carried out to study the effect of water soluble fertilizers on growth and yield parameters of brinjal hybrids due to application of various levels of water-soluble fertilizer.
Abstract: In the present study, a field investigation was carried out to study the effect of water soluble fertilizers on growth and yield parameters of brinjal hybrids due to application of various levels of water soluble fertilizer. Foliar spray of NPK with 5 and 7 sprays, each starting from 30 DAT at 10 d interval, formed twenty treatments in two hybrids. The results showed that among the two different concentrations of foliar applied nutrients, 7 sprays of 1% NPK (19:19:19) along with 100 per cent recommended dose of fertilizer (200:150:100 kg ha-1) recorded the highest plant height, number of primary branches, secondary branches, stem girth, number of leaves per plant, leaf area.
TL;DR: An efficient protocol for in vitro organogenesis and plant regeneration in sesame was attempted with TMV 3 cultivar and assures a high frequency of shoot regeneration, root induction and also plant survival rate.
Abstract: The regeneration methods in Sesame (Sesamum indicum L.) already developed were genotype dependent and were unsuccessful for Indian cultivars. Hence, an efficient protocol for in vitro organogenesis and plant regeneration in sesame was attempted with TMV 3 cultivar. Immature cotyledons derived from 1-week old seedlings were cultured on MS (Murashige and Shoog) medium fortified with different concentrations of 6-benzylaminopurine (BAP), thidiazuran (TDZ) and kinetin for adventitious shoot induction. It was found that optimal medium for direct shoot formation was MS with BAP (2.0 mg/l) at a frequency of 74% with an average of 4.5 shoots per expalnt. The shoot regeneration frequency was significantly reduced with either TDZ or kinetin when compared with BAP alone. Elongated individual shoots were transferred on MS media supplemented with Indole Butyric Acid (IBA; 0.5 mg/l) showed rooting frequency of 70%. The rooted plantlets were acclimatized to potting mixture containing sand, soil and clay mixture and grown to maturity with survival rate of 65 %. No phenotypic aberrations were observed among the ex vitro transferred plantlets. The protocol described here assures a high frequency of shoot regeneration, root induction and also plant survival rate.
01 Jan 1970
TL;DR: In this paper, the increasing concentrations (10, 25, 50, 75 and 100 mg/kg) of soil cadmium on growth and biochemical contents in tomato plants were analyzed on 30th sampling days.
Abstract: The increasing concentrations (10, 25, 50, 75 and 100 mg/kg) of soil cadmium on growth and biochemical contents in tomato plants were analysed on 30th sampling days. Control plants were maintained separately. Plants were grown in pots containing 3 kg of air dried sandy loam soil and treated with different concentrations (mg/kg) of cadmium (0, 10, 25, 50, 75 and 100). Treatments decreased the growth parameters such as root and shoot length and biochemical constituents such as protein, (except, proline and phenol content) contents in tomato plants compared to untreated plants. The shoot length of cadmium treated tomato plants was higher than the root length. proline and phenol content of root of tomato plants was higher than the shoot.
TL;DR: Heterosis components of grain yield in F1 hybrids IR58025A, IR62829A and PUSA3A and IR42 were found to record high per se performance, higher percentage of standard heterosis for majority of the traits.
Abstract: Rice is the foremost food crop among cereals and it is staple food crop providing high calories for the people of South East Asia. The Objectives of the study was the extent of heterosis components of grain yield in F1 hybrids. The Materials for this study considered of parents and thirty F1 hybrids derived from crossing of three cross lines viz., IR58025A, IR62829A and PUSA3A and ten testers. Pollen and spikelet fertility revealed the identification of ten testers. For heterosis studies majority of the crosses showed positive heterosis for the characters viz., productive tillers, filled grains per panicle, spikelet fertility, thousand grain weight, grain yield per plant, grain length, grain breadth, grain L/B ratio, kernel L/B ratio, milling recovery, head rice recovery, and amylose content. Negative heterosis were recorded for the characters namely days to first flowering, plant height, panicle length, kernel length, kernel breadth and alkali digestion value. Hybrids IR58025A ASD19, IR62829A ASD16, PUSA3A IR42 were found to record high per se performance, higher percentage of standard heterosis for majority of the traits.
01 Jan 1970
TL;DR: In this article, a study was carried out in the Department of Horticulture, Annamalai University, with the objectives to study the influence of Coir pith, Stockosorb and Geohumus as components of growing media along with FYM, Vermicompost and Leaf mould compost on growth and performance of ornamental plants for establishment of vertical garden.
Abstract: Vertical gardens are becoming a common component in contemporary garden designs at urban living space because of shrinking land spaces. Successful growing of plants in vertical garden systems depends up on growing container, plants chosen, growing media, etc. Hence a study was carried out in the Department of Horticulture, Annamalai University, with the objectives to study the influence of Coir pith, Stockosorb and Geohumus as components of growing media along with FYM, Vermicompost and Leaf mould compost on growth and performance of ornamental plants for establishment of vertical garden and to study the performance of ornamental plants Viz., Philodendron erubescens Cv. ‘Gold’, Chlorophytum comosum Cv. ‘Variegatum’ and Polyscias fruticosa plants in wooden containers for establishment of vertical garden. The experiment was laid out in Completely Randomized Design in wooden containers, with ten treatment combinations of various growing media mixtures comprising red soil, river sand as basic components in combination with organic manures (FYM, vermicompost, leaf mould compost, coir pith) and hydrogels (Stocksorb and Geohumus). The plant growth characters and ornamental value index were observed. Among the three ornamental plants used, Polyscias fruticosa and Philodendron erubescens are performed better as ornamental plants in vertical garden system with the growing media of Red soil: River sand: Vermicompost @ 1:1:1/2 + Stockosorb(25g).
01 Jan 1970
TL;DR: The study reveals the importance of the weed plants associated with paddy fields, a total of 40 species of weeds belonging to 22 families has been recorded in meeting the multiple requirements of human beings.
Abstract: Tamilnadu is one of the leading states in rice production in India. Weeds are widely found and are tremendously grown everywhere on paddy fields. Ethnobotany have gained importance during recent years. Based on this, an ethnobotanical exploration has been carried to find out the medicinal values of weed plants growing in the paddy fields of Annamalai Nagar, Cuddalore district. The study reveals the importance of the weed plants associated with paddy fields, a total of 40 species of weeds belonging to 22 families has been recorded in meeting the multiple requirements of human beings.
TL;DR: In this article, the authors evaluated the response of brinjal (Solanum melongena L.) with conventional, non-conventional organic source, industrial by-products combined with inorganic fertilizers.
Abstract: This study was conducted to evaluate the response of brinjal (Solanum melongena L.) with conventional, non-conventional organic source, industrial by-products combined with inorganic fertilizers. The treatments imposed were T1–Control (100% RDF), T2-100% RDF+Municipal Solid Waste Compost @ 5 t ha-1, T3–100% RDF+Municipal Solid Waste Compost @ 10 t ha-1, T4–100% RDF+Vermicompost @ 2.5 t ha-1, T5–100% RDF+Vermicompost @ 5 t ha-1, T6–100% RDF+Rice Husk Ash @ 5 t ha-1, T7–100% RDF+Rice Husk Ash @ 10 t ha-1, T8–100% RDF+Lignite Fly Ash @ 5 t ha-1, T9–100% RDF+Lignite Fly Ash @ 10 t ha-1. There were nine treatments combinations replicated thrice in CRD. The soil was sandy in texture with available nitrogen, phosphorus and potassium of 257, 10.2 and 117 kg ha-1 respectively which fell in fertility status of low. The soil classified taxonomically as Typic Udisamments. The results showed that application of 100% RDF+Vermicompost @ 5 t ha-1 (T5) significantly increased yield attributes viz., fruit length (16.6 cm), fruit girth (15.2 cm), no. of fruits plant-1 (20.67), fruit weight (45.2 g) and fruit yield plant-1 (934.2 g plant-1). This treatment registered maximum quality attributes like ascorbic acid content (4.5 mg 100 g-1), crude protein (4.81%), dry matter of fruit (70.2 g plant-1) and dry matter of plant (81.3 g plant-1). The post harvest soil available N (148 mgkg-1) and P (7.15 mgkg-1) status was higher due to application of 100% RDF with Vermicompost @ 5 t ha-1 (T5). The post harvest available K (75.58 mgkg-1) status recorded higher in the treatment T9 which received 100% RDF with Lignite Fly Ash @ 10 t ha-1 (T9).
TL;DR: In this article, a study was conducted to compare the effect of mutagens on yield and yield attributes of chickpea in M1 generation, and the results showed that the mean value of all the quantitative traits showed a reduction upon enhancing the doses of mutagen.
Abstract: A study was conducted to compare the effect of mutagens on yield and yield attributes of chickpea in M1 generation. In this regard, ‘CO-4’ variety of chickpea was subjected to different concentrations of gamma rays (20, 30, 40, 50 and 60kR) and EMS (10, 20, 30, 40 and 50mM) for inducing mutation. The effect of gamma rays and EMS with different doses/concentrations on yield and yield attributes were observed in M1 generation. From the result, it was observed that the mean value of all the quantitative traits of M1 generation showed a reduction upon enhancing the doses of mutagen. Mean performance in terms of these traits showed good qualities in comparison with the treated plant. The lethal doses were found in 40kR of gamma rays and 30mM of EMS and were carefully analyzed for further generations.
01 Jan 1970
TL;DR: In this study, the application of CCC 1500 ppm exerted favourable influence and enhanced the flower bud characters and the plant growth retardants did not show any significant effect on shelf life of flowers.
Abstract: An experiment was conducted to study the effect of growth retardants on flowering and yield parameters and shelf life of spanish jasmine. The experiment comprised of eleven treatments each replicated thrice was executed following the principles of randomized block design. The treatments included foliar spray of CCC @ 1000, 1500 and 2000 ppm, alar @ 1000, 2000 and 3000 ppm, ethrel @ 1000, 1500 and 2000 ppm, pruning and untreated control. In this study, the application of CCC 1500 ppm exerted favourable influence and enhanced the flower bud characters viz., flower bud length (2.98 cm), flower stalk length (2.36 cm) and total length of the flower (5.34 cm). The yield and yield attributes viz., hundred flower buds weight (9.90 g), flower buds yield plant-1(4.23 kg), flower buds yield plot-1(33.84 kg) and flower buds yield hectare-1 (14.1 t ha-1) were also found to be the maximum in the plants treated with CCC 1500 ppm. The plant growth retardants did not show any significant effect on shelf life of flowers.
TL;DR: It was found that both mutagens at lower treatments have influenced less biological damage and could be suitable for inducing desirable mutations in Finger millet.
Abstract: This study was performed by exposing the seeds of Finger millet (Eleusine coracana L. Gaertn.) Var CO-13 to Ethyl Methane Sulphonate (EMS) and Diethyl sulphate (DES). The observations were made on seed germination and survivability in M1 generation. The study revealed that germination percentage and survivability were decreased by increasing concentration of the mutagens when compared to the control. The LD50 value was found in 30 mmol of EMS and 40 mmol of DES. So it was found that both mutagens at lower treatments have influenced less biological damage and could be suitable for inducing desirable mutations in Finger millet.
TL;DR: The results indicated that composite and hybrid mixture base populations shall be of great use in deriving genetically divergent inbreds and single cross hybrids with significant standard heterosis suitable for commercial exploitation.
Abstract: The concepts of combining ability and heterosis are the fundamental tools for enhancing productivity of different crops. The main objective is to study the usefulness of inbreds derived from four different base populations namely advanced generations of single cross hybrids, three way cross hybrids, hybrid mixtures and composites by analyzing the combining ability of inbreds and crosses derived and the heterosis obtained for important characters. One hundred and forty four maize inbreds derived from four different base populations namely advanced generations of single cross hybrids, three way cross hybrids, hybrid mixtures and composites were studied for their heterotic expression. The results indicated that composite and hybrid mixture base populations shall be of great use in deriving genetically divergent inbreds and single cross hybrids with significant standard heterosis suitable for commercial exploitation.
TL;DR: The results revealed that the Chicory @ 20 % Pre sowing seed treatment+Chicory foliar spray @ 30 % during pod filling stage significantly increased the resultant seed quality characters of the sesame, when compared to other concentration and control.
Abstract: An evaluation was carried out to study the effect pre sowing seed treatment and foliar spay with chicory leaf extract on resultant seed quality characters of sesame cv TMV 3. The bulk seeds were graded for uniformity using appropriate round perforated metal sieves of sizes of 5/64\" size sieve and were imposed various concentration of chicory leaf extract presowing treatment coupled with foliar spray at different concentration under drought condition. After harvest the resultant seeds were evaluated for its seed qualities. The results revealed that the that the Chicory @ 20 % Pre sowing seed treatment+Chicory foliar spray @ 30 % during pod filling stage significantly increased the resultant seed quality characters of the sesame, when compared to other concentration and control.
01 Jul 1970
TL;DR: In this article, the linear isometry of the sequence space l(pv) into itself is specified as the automorphism of l( pv) onto itself, when (pv satisfies the conditions, (i) 0 < pv⩽ 1, (ii) 1 +d ⩽ pv
Abstract: In this paper, the linear isometry of the sequence space l(pv) into itself is specified as the automorphism of l(pv) onto itself, when (pv) satisfies the conditions, (i) 0 < pv⩽ 1, (ii) 1 +d ⩽ pv
⩽ p o When (pv) satisfies condition (ii),l (pv) andl (qv) are proved to be perfect spaces in the sense of Kothe and Toeplitz. A similar result connecting linear isometry and automorphism has been noted in the case of a non-normable complete linear metric space whose conjugate space is also determined.
TL;DR: High heritability coupled with high genetic advance as percent of mean was recorded for percentage of disease infection, single plant seed yield, and number of pods per plant.
Abstract: The present investigation was conducted to examine the 41 blackgram genotypes along with one check (T-9) to study the genetic diversity. Analysis of variance showed highly significant differences among 41blackgram genotypes for 9 quantitative characters studied. Maximum genotypic and phenotypic variance was recorded for percentage of disease infection, single plant seed yield, and number of pods per plant. Minimum GCV and PCV were recorded for pod length, days to 50% flowering, number of seeds per pod. High heritability was recorded for percentage of disease infection, single plant seed yield, and number of pods per plant. High heritability coupled with high genetic advance as percent of mean was recorded for percentage of disease infection, single plant seed yield. Genetic diversity estimated in 41 blackgram genotypes using Mahalanobis’s D2statistic. Forty one genotypes were grouped into seven clusters by Tocher method (Mahalanobis Euclidean Distance) cluster analysis. The maximum inter-cluster distance was observed between cluster VI and cluster VII and maximum intra-cluster distance was observed in cluster VI. Cluster VII showed maximum cluster mean value for seed yield per plant. Among all the characters, seed yield per plant and percentage of disease infection contributes maximum.