Results 151 to 160 of about 59,009 (188)

RNA synthesis during pollen germination

Planta, 1971
Regulation of pollen germination of Petunia was investigated by determining RNA content and composition in an in vitro system in the presence and absence of the transcription inhibitor actinomycin D and by labelling with C14-orotic acid.At the beginning of the progamic phase 2 stages can be distinguished: First (up to 15 minutes) no essential RNA ...
H F, Linskens, J A, van der Donk, J, Schrauwen   +2 more
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POLLEN GERMINATION AND TUBE GROWTH

Annual Review of Plant Physiology and Plant Molecular Biology, 1997
▪ Abstract  Many aspects of Angiosperm pollen germination and tube growth are discussed including mechanisms of dehydration and rehydration, in vitro germination, pollen coat compounds, the dynamic involvement of cytoskeletal elements (actin, microtubules), calcium ion fluxes, extracellular matrix elements (stylar arabinogalactan proteins), and control
Loverine P., Taylor, Peter K., Hepler
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Actin during pollen germination

Journal of Cell Science, 1986
ABSTRACT The cytoplasm of the vegetative cell of the ungerminated pollen grain of Endymion non-scriptus and other angiosperm species contains numerous fusiform bodies sometimes exceeding 15 gm in length and 2-5 gm in width, which bind fluorescent-labelled phalloidin and are likely therefore to constitute a storage form of actin.
J. Heslop-Harrison, Y. Heslop-Harrison, M. Cresti, A. Tiezzi, F. Ciampolini   +4 more
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Pollen Germination and Pollen Tube Growth

2001
Pollen, the male gametophyte of higher plants, is a biological system playing a central role in sexual plant reproduction (Cresti et al., 1992). The understanding of the mechanisms controlling the various aspects of pollen tube development has a direct relevance to biotechnological applications since it represents a starting point to modify crop ...
A. Moscatelli, M. Cresti
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Proteomics of Pollen Development and Germination

Journal of Proteome Research, 2007
In higher plants, pollen grains represent the vestiges of a highly reduced male gametophyte generation. After germination, the pollen tube delivers the sperm cells by tip-growing to the embryo sac for fertilization. Besides the intrinsic importance for sexual reproduction, pollen development and germination serve as an attractive system to address ...
Shaojun, Dai, Tai, Wang, Xiufeng, Yan, Sixue, Chen   +3 more
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Germination Schedules of Pollen Grains: Implications for Pollen Selection

Evolution, 1989
Temps de germination d'un ensemble de grains de pollen chez Erythronium grandiflorum en fonction de la densite des grains etudies en relation avec la selection pendant la croissance du tube ...
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Germination of Compound Pollen Grains

Grana, 1972
Abstract Very little is known about the germination of compound pollen grains of Angiosperms. Pollen of Acacia auriculaeformis, Asclepias curassavica, Calliandra surinamensis, Enterolobium saman, Hoya lacunosa, Mimosa pudica, Nepenthes ampullaria, and Pithecellobium dulce were used to study germination in vitro.
A. N. Rao, E. T. Ong
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Structural and molecular basis of pollen germination

Plant Physiology and Biochemistry, 2023
Pollen germination is a prerequisite for double fertilization of flowering plants. A comprehensive understanding of the structural and molecular basis of pollen germination holds great potential for crop yield improvement. The pollen aperture serves as the foundation for most plant pollen germination and pollen aperture formation involves the ...
Wei Zhao, Quancan Hou, Yuchen Qi, Suowei Wu, Xiangyuan Wan   +4 more
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Sugarbeet Pollen Germination in Vitro

Journal of Sugarbeet Research, 1988
Factors affecting in vitro germination of sugarbeet (Beta vulgaris L.) pollen were investigated to provide improved methods of testing pollen viability. Pollen germinated most frequently and consistently in a liq­ uid medium (pH 5.5, 100 ppm H3B03, 100 ppm Ca(N03)2 • 4H20, and 3.2 x lOs ppm sucrose in dis­ tilled water) at 23 C for 24 hours.
R.J. Hecker, M. McClintock
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Lectins stimulate pollen germination

Nature, 1975
POLLEN germination involves the conversion of the quiescent vegetative cell into a metabolically active and rapidly growing pollen tube1. Although many external factors influence pollen germination, no predominant control mechanism has been identified. In certain lymphocytes in culture, lectins (plant agglutinins) have been shown to stimulate quiescent
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