The gametophyte represents the sexual phase in the alternation of generations in plants; the
other, nonsexual phase is the sporophyte. Here, we review the evolutionary origins of the …

▪ Abstract Pollen tubes and root hairs are highly elongated, cylindrically shaped cells whose
polarized growth permits them to explore the environment for the benefit of the entire plant …

All living cells use a network of signal transduction pathways to conduct developmental
programs, obtain nutrients, control their metabolism, and cope with their environment. A …

▪ Abstract Many aspects of Angiosperm pollen germination and tube growth are discussed
including mechanisms of dehydration and rehydration, in vitro germination, pollen coat …

Most textbooks describe pollen and pollen tubes as the vectors carrying the male sperm
cells in seed plants. The pollen tubes grow through the style to the ovule, where the sperm …

Pollen tubes grow rapidly by very fast rates and reach extended lengths to bring about
fertilization during plant reproduction. The pollen tube grows exclusively at its tip …

The pollen tube is a cellular protuberance formed by the pollen grain, or male gametophyte,
in flowering plants. Its principal metabolic activity is the synthesis and assembly of cell wall …

Pollen tubes elongate within the pistil to transport sperms to the female gametophytes for
fertilization. Pollen tubes grow at their tips through a rapid and polarized cell growth process …

Tip-growing pollen tubes provide a useful model system to study polar growth. Although
roles for tip-focused calcium gradient and tip-localized Rho-family GTPase in pollen tube …

Pollen tube growth attracts our attention as a model system for studying cell elongation in
plants. The process is fast, it is confined to the tip of the tube, and it is crucial for sexual …