Showing papers on "Peduncle (anatomy) published in 1997"

Plant regeneration from peduncle segments of oil seed Brassica species: Influence of silver nitrate and silver thiosulfate

Abstract: Cultured peduncle segments of B. juncea, B. campestris, B. napus, B. nigra and B. carinata produced shoot buds on Murashige and Skoog medium supplemented with benzyladenine and 1-naphthalene acetic acid. Supplementation of the media with 30 µm silver nitrate or silver thiosulfate enhanced the frequency of shoot regeneration. The regenerated shoots could be rooted at a frequency of 95% and transferred to soil where 75% survived and set seed.

Genetics of yield determining factors in spring wheat over environments

Abstract: Genetics of yield determining factors was studied in a set of 10 X 10 half-diallel progenies (F1 and F2) of springwheat over three environments. The results of components of variance analysis pooled over environments revealed that both additive (D) and nonadditive (H1 and H2)components of variation were involved in the expression of almost all the characters in F1 as well as F2 generations. However, the nonadditive components were higher than additive component excegt in few cases in F1 where the additive component was preponderant. The {H1/D)1/2 values revealed overdominance for all the characters in both generations except for days to heading, plant height, peduncle length, spike length and spikelets per spike in F1, where partial dominance was recorded. The values of Fexhibited excess of dominant alleles for days to heading, days to maturity, spikelets per spike (F1 and F2) and peduncle length (F2), and directional dominance of the decreasing genes for plant height and spike length (F2. Biparentalmating and/ordiallel selective mating system could be the best breeding method for more tangible advancement in spring wheat.

Protein accumulation potential in barley seeds as affected by soil‐ and peduncle‐applied N and peduncle‐applied plant growth regulators

Abstract: Although much investigated, the factors constraining cereal grain protein accumulation are not well understood. As a result of the development of a new technique, new approaches to this question are now possible. A peduncle perfusion system was used to deliver a range of plant growth regulators (PGRs) and/or N solutions into barley (Hordeum vulgare) plants during the grain-filling period. The perfusion technique floods the peduncle interior with a treatment solution for periods of weeks to months, allowing the plant to take up administered substances from the perfused solution. The objectives of the present work were to determine: (1) whether some PGRs could alter the overall pattern of N allocation within barley plants, perhaps leading to higher protein accumulation in the seeds, (2) whether the addition of N through the peduncle could increase the seed N concentration even when the concentration of N in the rooting medium was high, and (3) whether or not PGR-stimulated elevations in grain protein levels and peduncle-added N increases in grain protein levels were additive. Three experiments were conducted to determine the physiological effects of (I) peduncle-administered PGRs (2) combinations of soil- and peduncle-applied N and (3) selected combinations of soil- and peduncle-administered N, and peduncle-applied PGRs on photosynthetic rate, dry matter partitioning and N accumulation of barley plants during grain filling. The first experiment tested four PGRs: abscisic acid (ABA), kinetin, gibberellic acid (GA 3 ), and 2,4-dichlorophenoxy acetic acid (2,4-D) each at three concentrations. The second experiment tested three levels of soil N (NH4NO3) fertility, and two concentrations of peduncle-added N (urea). The third experiment tested four PGRs: ABA, kinetin, GA 3 , and 2,4-D with two soil N concentrations and two concentrations of peduncle-added N. ABA and 2,4-D decreased total seed weight of the perfused spike. The addition of peduncle-perfused N increased seed protein concentration and content under conditions of high soil N fertility, suggesting that seed protein accumulation is more limited by the ability of roots to take up N from the soil than by the seed to take up N from the rest of the plant. The effects of the PGRs on N allocation among plant parts varied with the amount of N available to the plant. Because it resulted in less protein stored in the flag leaf and more in the seeds, GA 3 perfusion caused an overall change in the allocation of N among plant parts. Peduncle perfusion of kinetin and ABA affected some aspects of photosynthetic physiology.

A new species of Typhonium from Thailand

Abstract: Typhonium smitinandii D . Sookhaloem et J. Murata is described from Peninsular Thailand as a new species. This species belongs to sect. Typhonium and is distinct in the association of the broadly ovate leaves, peduncle with glandular hairs, filiform spadix appendix and capitate sterile flowers.

Variation in floral morphology and reproductive success in Petrocoptis grandiflora (Caryophyllaceae)

Abstract: We examined variation in the floral morphology of Petrocoptis grandiflora Rothm. (Caryophyllaceae), a plant endemic to the northwest Iberian Peninsula. First, we investigated whether peduncle length, calyx length and petal-limb length influence reproductive success (as measured by seed production). Second, we investigated whether floral morphology varies with position in the inflorescence and/or among the six populations studied. Peduncle length and calyx length showed no significant relationship with seed production; however, petal-limb length was significantly and positively correlated with the number of seeds produced by the flower. All three morphometric characters, and the number of ovules per ovary, varied significantly with position in the inflorescence, but not among populations.

Fruit vegetable reaping hand device

Abstract: PROBLEM TO BE SOLVED: To provide the subject device enabling fruit vegetables to be assuredly harvested by a reaping hand, therefore enabling their harvest to be improved, thus useful for cherries, cherry tomatoes, etc., so designed that a griphand to grip the peduncle of fruit vegetables to be harvested is set faced in front of a reaping hand. SOLUTION: In this reaping hand device designed to harvest fruit vegetables A through taking them into a catching port 8 at the tip of a reaping hand 7, a griphand 47 to grip the peduncle B of the fruit vegetables A to be reaped is set faced in front of the reaping hand T. It is preferable that an additional griphand 47a be provided below so as to sandwich the reaping hand 7 in combination with the griphand 47 and a peduncle B be gripped by at least two griphands 47, 47a to harvest fruit vegetables.

A New Species of Leptocuma Sars, 1873 (Cumacea) From the South American Atlantic Coast

Abstract: Leptocuma borzonei n. sp. is described and illustrated from material collected in southern Brazil and the province of Buenos Aires, Argentina. This species is most closely related to L. forsmani Zimmer, 1943 from Baja California. The female of L. borzonei differs from that of L. forsmani by its larger size, its carapace being approximately 1/7th of the total length, the antennal notch very widely open, the second peraeopod very short, the uropodal rami approximately as long as the peduncle, and the uropodal endopod with a row of 9-13 plumose setae.

Fruit harvesting hand

Abstract: PROBLEM TO BE SOLVED: To prevent fruit taken into a finger of a fruit harvesting hand from damaging in cutting a peduncle. SOLUTION: Two pairs of fruit-detecting sensors 4 and 5 are provided at both ends of two fingers 2 and 3 of a fruit harvesting hand 1. A peduncle- detecting sensor 12 respectively arranging a luminous part 10 in the center and a receiver 11 at the both ends is provided in the upper part of the center on the side of the fruit harvesting hand 1 of two fingers 2 and 3. The fruit harvesting hand 1 detects a tilt angle in the depth direction of the fruit 13 taken in two fingers 2 and 3 and controls the posture of the fruit harvesting hand 1 to an angle nearly perpendicular to the central axis of fruit taken in the fingers to cut the peduncle 14.

Classification of Korean Native Anemarrhena asphodeloides Bunge by Cluster Analysis

Abstract: Anemarrhena asphodeloides BUNGE is one of important medicinal crops, which has been collected or/and cultivated for its rhizomes. The main medicinal ingredient of the A. asphodeloides Bunge rhizomes is a saponin, which is known to have medical values for diaphoresis, sedatives and biuresis. However, studies on cultural methods and breeding works on this plant have not been made in detail. To increase productivity and to improve quality of crops, it is important to collect cultivated and wild lines, to classify them based on morphological and genetic characteristics, and to select superior pure lines at first. Therefore, total 20 A. asphodeloides lines collected were cultivated at the fieldof Chungnam Provincial Administration of Rural Development in 1995 to study the agronomic characteristics and to classify them based on morphological characteristics. Characteristics related with reproductive organ such as the number of spikes per plant and peduncle length showed greater variations than vegetative organrelated characteristics such as leaf length and rhizome length based on the coefficient of variation. Vigorous shoot growth resulted in better development of reproductive organs such as peduncle length and number of spikes per plant. However, the development of spikes was negatively correlated with chlorophyll content. Characteristics of underground parts were more significantly correlated with spike characteristics than aerial part characteristics. A. asphodeloides tested in this study were classified into 2 groups (group A and group B) based on centroid linkage cluster analysis. Group A showed more vigorous shoot growth with more leaves and spikes per plant, longer peduncle length, thicker peduncle diameter and higher shoot dry weight than group B. Group A could be further classified into 2 sub-groups based on leaf size, spike length and peduncle diameter, while group B also could be classified based on number of leaves, number of spikes and shoot dry weight.

Chrysanthemum plant named `Bronze Cantata`

Abstract: Chrysanthemum plant named `Bronze Cantata` particularly characterized by its flat capitulum form; daisy capitulum type; light orange-bronze ray floret color; diameter across face of capitulum of 76 to 89 mm when fully opened, when grown as a single stem spray cut mum; flowering response in Salinas under normal temperatures is 48 to 54 days after start of short days. Flowering response in Bogota, Colombia is 64 to 67 days after start of short days; plant height is 74 to 86 cm when grown in Salinas with 11 long days prior to start of short days; height is 102 to 112 cm when grown in Bogota with 14 to 15 long days prior to start of short days; peduncle length of the first and the fourth lateral at flowering after removing the apical bud without growth regulator applications is 5 to 15 cm and 8 to 20 cm when grown in Salinas, Calif., and 13 to 20 cm and 20 to 23 cm when grown in Bogota, Colombia; recommended as a spray cut mum; and uniform flowering in year round flowerings in both Salinas, Calif. and in Bogota, Colombia.