Petiole Explants
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Inducao e comportamento de calos de batata-doce em meio salino.
Com o objetivo de avaliar o comportamento de cultivares de batata-doce (Ipomoea batatas (L.)Lam.) quanto a producao de calos, em diferentes suplementacoes de fitohormonios, e em meio contendo diferentes concentracoes de NaCl, foram inoculados explantes de peciolo de nove cultivares no meio de Murashige & Skoog com suplementacoes de 2,21 ou 1,0 mg/L de 2,4-D,
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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2. MULTIPLICAÇÃO IN VITRO DE MAMOEIRO TAINUNG 01
Experiments were accomplished in establishment and multiplication medium with the objective of evaluating the micropropagation of the papaya tree (Carica papaya L.) Hybrid Tainung 01 , generation F1, being used apical sections and apical sections of lateral buds of juvenile plants, cultivated in greenhouse. In the MS establishment medium, being used apical s
Publicado em: 2006
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3. Apical Correlative Effects in Leaf Epinasty of Tomato 1
The influence of the stem apex on leaf curvature was investigated using debudded tomato (Lycopersicon esculentum Mill. cv Anahu) plants and petiole explants, consisting of a section of petiole attached to a section of stem.
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4. The Influence of Auxin, Cacodylic Acid, and Amitrole on the Abscission of Petiole Explants 1
The influence of indoleacetic acid, cacodylic acid (hydroxy-dimethylarsine oxide), and amitrole (3-amino-1,2,4-triazole) on the petiole explant abscission rate was studied in three species. Indoleacetic acid increased the abscission rate in both bean (Phaseolus vulgaris L. var. Red Kidney) and Coleus (Coleus blumei Benth) at 10−3 and 10−4m but had no eff
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5. Inhibition of Abscission by Calcium 1
An inhibition of abscission in bean petiole explants is reported for additions of calcium salts, especially at concentrations between 10−3 and 10−1m. Magnesium is less effective, and other commmon macronutrients are ineffective in inhibiting abscission. Evidence from timing experiments indicates that the calcium inhibition may act on the stage I or the �
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6. Abscission: The Phytogerontological Effects of Ethylene
The role of ethylene in the aging of bean (Phaseolus vulgaris L. cv. Red Kidney) petiole abscission zone explants was examined. The data indicate that ethylene does accelerate aging in addition to inducing changes in break strength. Application of ethylene during the aging stage (stage 1) promoted abscission when followed by a second ethylene treatment durin
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7. Kinetics of Abscission in the Bean Petiole Explant 1
The progress of bean petiole abscission has been followed using quantitative measurements of the mechanical force required to break explants at the separation zone. It is found that the shortest time for a measurable effect of ethylene (1 ppm) in stimulating the development of frangibility is about 1 hr. Removal of the ethylene is followed by a return to the
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8. Role of IAA-Oxidase in Abscission Control in Cotton 123
The potential role of indoleactic acid (IAA)-oxidase as an in vivo abscission regulating system in the cotton (Gossypium hirsutum L.) cotyledonary explant was investigated. Phenols (usually monophenols), which are cofactors of cotton IAA-oxidase in vitro, accelerated abscission. Phenols (usually orthodihydroxyphenols), which inhibit cotton IAA-oxidase in vit
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9. Abscission of Phaseolus and Impatiens Explants: Effects of Ionizing Radiation upon Endogenous Growth Regulators and de Novo Enzyme Synthesis 1
Stem-petiole explants from the lower pulvinus of the primary leaves of Phaseolus vulgaris L. cv. Red Kidney and from Impatiens sultani Hook cv. Scarlet Baby were exposed to varying dosages of γ-radiation. With bean, irradiation of 175 to 525 kiloroentgens (kR) significantly accelerated the onset of abscission with a maximum response at 175 to 280 kR. Higher
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10. Hormonally Induced Changes in the Stem and Petiole Anatomy and Cellulase Enzyme Patterns in Phaseolus vulgaris L. 1
Time course changes were observed in petiole and stem anatomy and cellulase enzyme patterns in bean (Phaseolus vulgaris L.) explants when 10−5 or 10−2m indoleacetic acid in lanolin paste was applied to acropetal cut surfaces in the presence or absence of ethylene. Auxin (10−2m) in the presence of ethylene stimulated rapid ordered cell division and dedi
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11. Transdifferentiation of Mature Cortical Cells to Functional Abscission Cells in Bean1
Abscission explants of bean (Phaseolus vulgaris L.) were treated with ethylene to induce cell separation at the primary abscission zone. After several days of further incubation of the remaining petiole in endogenously produced ethylene, the distal two-thirds of the petiole became senescent, and the remaining (proximal) portion stayed green. Cell-to-ce
American Society of Plant Physiologists.
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12. Involvement of Abscisic Acid in Ethylene-Induced Cotyledon Abscission in Cotton Seedlings.
Cotton (Gossypium hirsutum L. cv LG102) seedlings raised from seeds exposed to 100 [mu]M norflurazon (NFZ) during imbibition contained reduced levels of free abscisic acid (ABA) and were visibly achlorophyllous. Exposure of untreated cotton seedlings to ethylene concentrations >1 [mu]L/L for 24 h resulted in cotyledon abscission. In contrast, exposure of NFZ