Effect of hormones on nucleolar growth and vacuolation in elongating cotton fibers |
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| Authors: | E. De Langhe S. Kosmidou-Dimitropoulou L. Waterkeyn |
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| Affiliation: | (1) Laboratory of Tropical Crop Husbandry, Catholic University of Leuven, Kard. Mercierlaan 92, B-3000 Leuven, Belgium;(2) Hellenic Cotton Board, Syngron Avenue, Athens, Greece;(3) Laboratoire de Cytologie et de Morphologie Végétales, Université de Louvain, B-1348 Louvain-La-Neuve, Belgium |
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| Abstract: | A rather precise combination of the three phytohormones, gibberellic acid, auxin, and abscisic acid, is necessary for the considerable growth of fiber nucleoli in Gossypium hirsutum L. for about 8 days after anthesis and for nucleolar  vacuolation in the second half of that period. Nucleolar growth and vacuolation must occur in a precise sequence for the fiber to reach a good final length. Nucleolar vacuolation indicates simultaneous output and neosynthesis of nucleolar material.Abbreviations ABA abscisic acid - 2,4-D 2,4-dichlorophenoxyacetic acid - FAA 5% acetic acid glacial, 5% formaldehyde (35%), 90% ethanol (50%) - Fl fiber length - Flx fiber length at day x post anthesis - GA3 gibberellic acid - IAA indole-3-acetic acid - NPS nonpollinated, grown in situ - Nu nucleolus - NuS size of the nucleolus - PS normal pollination, grown in situ - PV pollinated, grown in vitro - Vac F vacuolation frequency |
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| Keywords: | Abscisic acid Auxin Cell elongation Fibers Gibberellin Gossypium Nucleolus |
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