Maintaining Apical Dominance in the Fern Gametophyte
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چکیده
منابع مشابه
Hormone Levels and Apical Dominance in the Aquatic Fern Marsilea drummondii A. Br.
Terminal buds and successively subjacent lateral buds of the water fern, Marsilea drummondii, were examined to determine the pattern of hormone distribution in relation to apical dominance. Quantitative levels of indole-3-acetic acid (IAA), abscisic acid (ABA), zeatin and zeatin riboside (Z and ZR), and isopentenyladenosine (iPA) were determined by a solid-phase immunoassay using polycional ant...
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The haploid gametophytes of the fern Ceratopteris richardii are autotrophic and develop independently of the diploid sporophyte plant. While haploid genetics is useful for screening and characterizing mutations affecting gametophyte development in Ceratopteris, it is difficult to assess whether a gametophytic mutation is dominant or recessive or to determine allelism by complementation analysis...
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The mechanism by which fully developed chloroplasts divide has been reported to consist of an initial constriction around the entire chloroplast, which is followed by a p inching into two daugh te r chloroplasts. Constr ict ion is accompanied by fusion of the inner and outer layers of the chloroplast membrane . Such a division has been documented by electron microscopy for the brown alga, Fucus...
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Fern (Onoclea sensibilis L.) gametophytes exposed to blue light are induced to undergo a morphological transition from a tip-growing filament to a planar prothallus. Extracellular measurements of electric currents and localized ion activities around the apical cell of 8 to 10 day-old gametophytes were made with a vibrating probe and ion selective electrodes. In darkness, we observed exit curren...
متن کاملAuxin - Gibberellin Interaction in Apical Dominance " 2
Indoleacetic acid and gibberellic acid were added to decapitated lightgrown 'Alaska' pea seedlings as substitutes for the intact apex in the control of apical dotiinance. Of various concentrations and combinations tried, a conrbintation of 1 % indoleacetic acid 1 % gibberellic acid was the most inihibiting to side bud growth. The greatest degree of hormonally induced side bud inhibition was ach...
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ژورنال
عنوان ژورنال: Annals of Botany
سال: 2002
ISSN: 0305-7364,1095-8290
DOI: 10.1093/aob/mcf061