Results 311 to 320 of about 76,851 (355)

Pollen and Pollen Tube Proteomics

2007
Germinated pollen grains form pollen tubes that accomplish rapid polar- ized growth within female gametophytic tissues in order to deliver the sperm cell to the ovule. This process is essential for successful plant fertilization in vivo. Pollen tubes are considered to be an ideal model system to study tip growth. A more com- prehensive understanding of
Tong Chen, Xiaoqin Wu, Yanmei Chen, Nils Böhm, Jinxing Lin, Jozef Šamaj   +5 more
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The pollen tube paradigm revisited

Current Opinion in Plant Biology, 2012
The polar growth process characterizing pollen tube elongation has attracted numerous modeling attempts over the past years. While initial models focused on recreating the correct cellular geometry, recent models are increasingly based on experimentally assessed cellular parameters such as the dynamics of signaling processes and the mechanical ...
Jens, Kroeger, Anja, Geitmann
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Actin and pollen tube growth

Protoplasma, 2001
Actin microfilaments (MFs) are essential for the growth of the pollen tube. Although it is well known that MFs, together with myosin, deliver the vesicles required for cell elongation, it is becoming evident that the polymerization of new actin MFs, in a process that is independent of actomyosin-dependent vesicle translocation, is also necessary for ...
L, Vidali, P K, Hepler
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Pollen mitosis and pollen tube growth inhibition by SO2 in cultured pollen tubes of Tradescantia

Environmental Research, 1976
Abstract Mature pollen of Tradescantia paludosa Anders. Sax clone-3 was collected from greenhouse grown plants and desiccated in the dark for 4–5 hours. The pollen was sown on microslides coated with lactose agar medium (supplemented with 0.02% colchicine).
T H, Ma, S H, Khan
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Calcium entry into pollen tubes

Trends in Plant Science, 2012
Growing pollen tubes require calcium to maintain a tip-focused cytosolic gradient and as a constituent of the constantly expanding cell wall. Advances in cell and molecular biology as well as electrophysiology implicate several candidate channels and receptors in the flow of calcium into the cell.
Peter K, Hepler, Joseph G, Kunkel, Caleb M, Rounds, Lawrence J, Winship   +3 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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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 in Pollen and Pollen Tubes

2000
Flowering plants rely on the highly polarized process of pollen tube growth for delivery of the sperm cells and thus for sexual reproduction. Although it has long been known that the actin cytoskeleton is necessary for pollen grain germination and tube growth, the precise structure of the actin arrays and their regulation by actin-associated proteins ...
Luis Vidali, Peter K. Hepler
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INDUCED POLLEN TUBE DIRECTIONALITY

American Journal of Botany, 1987
Pollen grains placed within longitudinal cuts in styles germinate and produce pollen tubes which grow equally well towards the stigma or the ovary. If there are simultaneous stigmatic pollinations, the growth of the intrastylar pollen tubes toward the stigma is significantly impeded.
Gabriella Bergamini Mulcahy, David L. Mulcahy   +1 more
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Gametophytic pollen tube guidance

Sexual Plant Reproduction, 2008
The concept of a pollen tube attractant was proposed in the late nineteenth century when pollen tubes were found to grow toward excised pistil tissues on medium. Since then, for about 140 years, plant biologists have tried to identify the pollen tube attractants.
Tetsuya Higashiyama, Yuki Hamamura
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