Floral movements: Stamen motion in Berberis trifoliolata
نویسندگان
چکیده
منابع مشابه
Evolution of perianth and stamen characteristics with respect to floral symmetry in Ranunculales.
BACKGROUND AND AIMS Floral symmetry presents two main states in angiosperms, namely polysymmetry and monosymmetry. Monosymmetry is thought to have evolved several times independently from polysymmetry, possibly in co-adaptation with specialized pollinators. Monosymmetry commonly refers to the perianth, even though associated androecium modifications have been reported. The evolution of perianth...
متن کاملGenetic ablation of petal and stamen primordia to elucidate cell interactions during floral development.
Two models have been proposed to explain the coordinated development of the four whorls of floral organs. The spatial model predicts that positional information defines the four whorls simultaneously, and that individual organs develop independently of surrounding tissues. The sequential model suggests that inductive events between the outer and inner whorl primordia are required for appropriat...
متن کاملThe Arabidopsis floral homeotic gene APETALA3 differentially regulates intercellular signaling required for petal and stamen development.
Cell-cell signaling is crucial for the coordination of cell division and differentiation during plant organogenesis. We have developed a novel mosaic analysis method for Arabidopsis, based on the maize Ac/Ds transposable element system, to assess the requirements of individual genes in intercellular signaling. Using this strategy, we have shown that the floral homeotic APETALA3 (AP3) gene has d...
متن کاملUp and down: stamen movements in Ruta graveolens (Rutaceae) enhance both outcrossing and delayed selfing.
BACKGROUND AND AIMS Stamen movements directly determine pollen fates and mating patterns by altering positions of female and male organs. However, the implications of such movements in terms of pollination are not well understood. Recently, complex patterns of stamen movements have been identified in Loasaceae, Parnassiaceae, Rutaceae and Tropaeolaceae. In this study the stamen movements in Rut...
متن کاملCucumber SUPERMAN Has Conserved Function in Stamen and Fruit Development and a Distinct Role in Floral Patterning
The Arabidopsis SUPERMAN (SUP) gene encodes a C2H2 type zinc finger protein that is required for maintaining the boundaries between stamens and carpels, and for regulating development of ovule outer integument. Orthologs of SUP have been characterized in bisexual flowers as well as dioecious species, but it remains elusive in monoecious plants with unisexual flowers on the same individual. Here...
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ژورنال
عنوان ژورنال: Botanical Sciences
سال: 2014
ISSN: 2007-4476,2007-4298
DOI: 10.17129/botsci.46