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  • 1
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    District-level mustard crop estimation for rajasthan: improving precision by in-season digital stratification (1997)
    Springer
    Details
    Publication Date: 1997-09-01
    Print ISSN: 0255-660X
    Electronic ISSN: 0974-3006
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Springer
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  • 2
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    Accuracy of mustard and wheat inventory at village-level using liss-II digital data in pali district, Rajasthan (1997)
    Springer
    Details
    Publication Date: 1997-09-01
    Print ISSN: 0255-660X
    Electronic ISSN: 0974-3006
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Springer
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  • 3
    Electronic Resource
    Electronic Resource
    Reversal of (±) -Abscisin II Induced Inhibition of Lettuce Seed Germination and Seedling Growth by Kinetin (1968)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 21 (1968), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Observations have been made on the effect of synthetic, (±)-abscisin II (dormin), alone and in combination with gibberellin, kinetin and indoleacetic acid, on seed germination and seedling growth of two strains of lettuce, cv. Attraktion and cv. Hohlblättriger Butter. (±)-Abscisin II inhibited seed germination and seedling growth in both strains. The inhibitory effect of abscisin II on seed germination as well as seedling growth was completely overcome by kinetin in both dark and light. Gibberellic acid, on the other hand, proved ineffective in exerting its influence on seed germination in presence of abscisin II but affected subsequent seedling growth as usual. Indoleacetic acid was found to be least potent in reversing abscisin II caused inhibition of seed germination and seedling growtb. It is concluded, that like its effect on certain other naturally occurring inhibitors of seed germination, kinetin can effectively undo the inhibitory effects of abscisin II in these growth processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1968.tb07243.x
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of growth regulators on somatic embryogenesis, plantlet regeneration, and post-transplant survival of Echinochloa frumentacea (1992)
    Springer
    Plant cell reports 11 (1992), S. 368-371 
    Details
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract After placement on Murashige and Skoog's basal medium supplemented with 3–5 mg/l 2,4-D, immature inflorescence expiants of Echinochloa frumentacea gave rise to three distinct types of callus: a) loosely arranged and soft; b) compact and translucent; c) compact, sticky and mucilaginous. Somatic embryo formation occurred in type ‘b’ callus in about 18–24 d. Callus types ‘a’ and ‘c’ did not produce somatic embryos. The highest percentage of cultures exhibiting somatic embryogenesis occurred on the medium containing 5 mg/l 2,4-D and 0.5 mg/l kinetin. Somatic embryos also formed directly on the inflorescence (without intervening callus formation) in about 15% of the expiants placed on this medium. The addition of paclobutrazol or uniconazole (0.25 or 1 mg/l) to the medium had no influence on the percentage of cultures exhibiting direct somatic embryogenesis, but paclobutrazol slightly increased the mean number of somatic embryos per culture. Many of the callus-derived somatic embryos germinated when subcultured on basal MS medium supplemented with kinetin. Addition of paclobutrazol or uniconazole to the culture medium at 0.25 or 1 mg/l decreased somatic embryo germination and shoot elongation but increased root length and leaf width. Both paclobutrazol and uniconazole increased survival of the plantlets following transplanting to soil. Increased post-transplant survival was accompanied by reduced water loss from plantlets produced on culture media containing triazoles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00233368
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  • 5
    Electronic Resource
    Electronic Resource
    Promotion ofin vitro shoot formation from excised roots of silktree (Albizzia julibrissin) by an oxime ether derivative and other ethylene inhibitors (1995)
    Springer
    Plant cell reports 15 (1995), S. 143-146 
    Details
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary This report describes the regeneration response of excised seedling roots of silktree (Albizzia julibrissin) to added ethylene precursors/generators (1-amino-cyclopropane-1-carboxylic acid [ACC], 2-chloroethylphosphonic acid [CEPA]), biosynthesis inhibitors (aminoethoxyvinylglycine [AVG], an oxime ether derivative [OED={[(ispropylidene)-amino]oxy}-acetic acid-2-(methoxy)-2-oxoethyl ester], CoCl2 [Co++]), and an ethylene action inhibitor (AgNO3 [Ag+]). When placed on B5 medium, about 50% of the control explants formed shoot buds within 15 days. Addition of ACC or CEPA (1–10 µM) to the culture medium decreased both the percentage of cultures forming shoots and the number of shoots formed per culture. In contrast, AVG and OED (1–10 µM) increased shoot formation to almost 100% and increased the number of shoots formed per culture. Likewise, both Co++ and Ag+ (1–10 µM) increased shoot regeneration, but the number of shoots produced after 30 days was less than with AVG or OED. The inhibitors of ethylene biosynthesis were partially effective in counteracting the inhibitory effect of ACC on shoot formation. These results suggest that modulation of ethylene biosynthesis and/or action can strongly influence the formation of adventitious shoots from excised roots of silktree.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01690272
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  • 6
    Electronic Resource
    Electronic Resource
    In vitro regeneration in chile pepper (Capsicum annuum L.) from ‘half-seed explants’ (1996)
    Springer
    Plant growth regulation 20 (1996), S. 287-293 
    Details
    ISSN: 1573-5087
    Keywords: Capsicum annuum ; chile pepper ; cytokinins ; half-seed explants ; in vitro regeneration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract An in vitro regeneration protocol has been developed from ‘half-seed explants’ of a mild (cv. New Mexico-6) and a pungent (cv. Rajpur Hirapur) chile pepper (Capsicum annuum L). Imbibed seeds were cut into two parts such that one portion contained the cotyledons and a part of the hypocotyl (part A) while the other part had the proximal part of the hypocotyl and the radicle (part B). These explants were cultured on MS medium with or without cytokinins (KIN, BA, ZEA, 2iP). Cytokinins dramatically increased both the percentage of explants forming buds as well as the number of buds per explant, and also hastened the rate of bud production. The relative efficacy of cytokinins in inducing the formation of leafy buds varied in the two cultivars. However, the best response was observed with ZEA in both cultivars. The highest percentage of bud formation was recorded after presoaking part B explants for 72 hours. The elongation growth of leafy buds was severely inhibited in the continuous presence of high concentrations of cytokinins, and frequently the buds became quite thick, ill-defined and vitreous. Within 3–5 weeks of transfer to Magenta boxes containing vermiculite and soil (1:3), 70–85% of the rooted hypocotyls developed 1–2 elongated shoots. Following transfer to pots, these plantlets grew into normal plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00043320
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  • 7
    Electronic Resource
    Electronic Resource
    Growth and organogenesis in moth bean callus cultures as influenced by triazole growth regulators and gibberellic acid (1991)
    Springer
    Journal of plant growth regulation 10 (1991), S. 41-45 
    Details
    ISSN: 1435-8107
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The triazole plant growth regulators, paclobutrazol and uniconazole, reduced in vitro growth of moth bean callus by 20–25% when added to the culture medium at 1 mg/L (3.4 μM). The addition of 10 mg/L (29 μM) gibberellic acid (GA3) to the culture medium in combination with the triazoles restored callus growth to a level equivalent to that of the untreated control. GA3 alone had little effect on callus growth. When added to a regeneration medium at 1 mg/L both paclobutrazol and uniconazole reduced the percentage of cultures that formed roots, as well as the mean number of roots per culture. In contrast, GA3 increased root formation and counteracted the inhibitory effects of the triazoles on rooting. The addition of triazoles or GA3 to the regeneration medium reduced the formation of green meristematic nodules, which are precursors of shoots in moth bean callus. When callus was grown in the presence of either paclobutrazol or uniconazole, subsequent root and green meristematic nodule formation were reduced upon transfer to a growth regulator-free regeneration medium. The results of this study indicate that exposure of moth bean callus tissue to micromolar concentrations of triazoles or GA3 can significantly alter in vitro growth and differentiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02279309
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  • 8
    Electronic Resource
    Electronic Resource
    In vitro regeneration of silktree (Albizzia julibrissin) from excised roots (1996)
    Springer
    Plant cell, tissue and organ culture 44 (1996), S. 83-86 
    Details
    ISSN: 1573-5044
    Keywords: adventitious shoot formation ; Albizzia julibrissin ; auxins ; cytokinins ; micropropagation ; silktree ; thidiazuron
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Root segments (1 cm long) were excised from 15–20 day old seedlings of silktree (Albizzia julibrissin) grown on B5 medium. About 50% of the control (no growth regulators added) root explants formed shoot buds within 15 days after placement on the culture medium. After 30 days, there were about 4 shoots per control explant. Addition of low levels of various auxins (0.5 μM) did not influence the formation of shoot buds from the explants. Higher concentrations (5μM), however, decreased shoot regeneration. Kinetin and 2iP did not influence shoot regeneration at the concentrations tested (1 & 10 μM). Addition of benzyladenine, Zeatin, or thidiazuron to the culture medium increased both the percentage of explants that formed shoots and the number of shoots per explant. Thidiazuron was highly effective in stimulating shoot formation at low concentrations (〈1 μM). At 0.05 μM thidiazuron, 95% of the explants produced shoots and about 10 shoots were formed per explant. Compared to TDZ, higher concentrations (10 μM) of benzyladenine and Zeatin were required to enhance shoot formation. Upon excision and transfer to B5 medium, regenerated shoots developed into normal rooted plantlets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00045917
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  • 9
    Electronic Resource
    Electronic Resource
    Hydrogen peroxide-scavenging enzymes and antioxidants in Echinochloa frumentacea as affected by triazole growth regulators (1992)
    Springer
    Plant growth regulation 11 (1992), S. 441-443 
    Details
    ISSN: 1573-5087
    Keywords: Ascorbate peroxidase ; dehydroascorbate reductase ; glutathione reductase ; malondialdehyde ; monodehydroascorbate reductase ; paclobutrazol ; uniconazole
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Paclobutrazol (PBZ)- and uniconazole (UCZ)-treated plants of Echinochloa frumentacea were shorter but had much wider leaves than untreated controls 10 days after treatment. Leaves of treated plants had a slightly higher concentration of soluble protein than the controls and exhibited enhanced activities of ascorbate peroxidase, monodehydroascorbate (MDHA) reductase, and glutathione (GSH) reductase. The triazoles did not influence the activity of dehydroascorbate (DHA) reductase. The leaves of treated plants had increased concentrations of water-soluble sulfhydryls and ascorbic acid. In contrast, the concentration of malondialdehyde (MDA), a by-product of lipid peroxidation, was lower in the leaves of treated plants than in controls. These results suggest that triazole growth regulators increased the activity of the endogenous H2O2-scavenging system in E. frumentacea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00130654
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