Results 221 to 230 of about 17,279 (261)
Some of the next articles are maybe not open access.
Pollen Germination and Pollen-Tube Growth
1987Publisher Summary Pollen germination and pollen-tube growth events when viewed either in culture or in the style are considered as biochemically, physiologically, and structurally complex. The various processes involved are each independent in some measure, but still all are interactive—namely, the successful attainment of the delivery of two male ...
openaire +1 more source
Pollen Germination and Tube Growth
2010Abstract Seeds and grains are staple food supply around the world and their production is the result of successful double fertilization of female gametophytes by male gametophytes. In flowering plants, the highly reduced haploid male gametophyte (pollen grain) plays a critical role in fertilization and crop production through the generation of a ...
Huei-Jing Wang +2 more
openaire +1 more source
Pollen Germination and Tube Growth
2009In higher plants, the sexual organs, e.g. anther and pistil, are separated spatially either within a flower in hermaphrodite plants or in different flowers as in monoecious plants. Successful fertilization requires temporally and spatially coordinated development of male and female organs and gametophytes.
D.-Q. Shi, W.-C. Yang
openaire +1 more source
Cytoplasmic motors and pollen tube growth
Sexual Plant Reproduction, 1996The growth of pollen tubes is characterized by an intense cytoplasmic streaming, during which the movements of smaller organelles (like secretory vesicles) and larger ones (including the generative cell and vegetative nucleus) are precisely coordinated. A well-characterized cytoskeletal apparatus is likely responsible for these intracellular movements.
CAI, GIAMPIERO +3 more
openaire +2 more sources
Calcium Control of Pollen Tube Tip Growth
The Biological Bulletin, 1989The role of calcium in pollen tube tip growth is reviewed. Calcium ions are essential for growth, but are inhibitory at high concentrations (above c. 10-2 M). Calcium intake is limited to the growing tip, and the inward flux of calcium appears to establish an ionic current within the surrounding medium. Cellular transport of calcium is reviewed against
openaire +2 more sources
Pollen Germination and Pollen Tube Growth in Vitro
1992Pollen germination and pollen tube growth are prerequisites for fertilization and seed development. Because of the involvement of the pistillate tissue in nature, physiologic and biochemical investigations on pollen germination and pollen tube growth in vivo are rather difficult. In vitro germination techniques have therefore been used extensively on a
K. R. Shivanna, N. S. Rangaswamy
openaire +1 more source
Arabinogalactan-Proteins in Pollen Tube Growth
2000Arabinogalactan-proteins (AGPs) were associated with reproductive tissues in the early days of their discovery (Nothnagel 1997). In particular, the stigmas and styles of flowering plants were abundant sources of AGPs, as revealed by Yariv phenylglycoside staining [(β-D-glucosyl) Yariv phenylglycoside [(β-D-G1C)3]], a red-colored reagent thought to bind
E. M. Lord +4 more
openaire +1 more source
Notes: Pollen Tube Growth in Quercus
Forest Science, 1997Abstract Fluorescence and brightfield microscopy were used to evaluate pollen tube growth in the Erythrobalanus and Lepidobalanus subgenera of the genus Quercus. All three species had the same pattern of pollen tube growth behavior, from the time pollen landed on the stigmas to the cessation of pollen tube elongation in mid-May.
openaire +1 more source
Pollen-tube growth studies in cherries
Journal of Genetics, 1941Studies of pollen-tube growth on diploid, triploid and tetraploid styles with the same range of pollen have shown: 1. The tetraploid cherryPrunus cantabrigiensis is self-compatible. 2. Self-pollination of triploids fails entirely, in part because of the high sterility of the pollen and in part from the deformation of the styles and ...
openaire +1 more source