Pollen, a mass of microspores in a seed plant, usually appearing as a fine dust and varying greatly in shape and structure. Each pollen grain is formed in the male structures of seed-bearing plants and is transported by various means to the female struct
Rudall PJ, Campbell G (1999) Flower and pollen structure of Ruscaceae in relation to Aspidistreae and other Convallariaceae. Flora 194:201–214Rudall P. J., Campbell G. (1999) Flower and pollen structure of Ruscaceae in relation to Aspidis- treae and other Convallariaceae. Flora 194:...
There are a number of trees to avoid if you are allergy-prone — and they are not necessarily a single species but usually a single sex. The allergen that triggers your allergy is usually produced by the “male” part of a tree. Trees vary widely in their capacity to produce and disper...
Basically, the pollen is the microscopic structure like grains, found in the anther of stamen in the angiosperms (Steven, 2014). Worker honeybees during visits attract the hundreds to thousands of pollen grains using weak electrostatic field generated between flower (negatively charged) and bee body...
Another name for pollen grain is microspore. Pollen grains are found in flowering plants, in the male structures. What produces pollen grains and where are pollen grains produced? Pollen grains are produced by the male structure of the flower and pollen grains are produced in, specifically the ...
Pollen tube is the fastest-growing plant cell. Its polarized growth process consumes a tremendous amount of energy, which involves coordinated energy fluxes between plastids, the cytosol, and mitochondria. However, how the pollen tube obtains energy and what the biological roles of pollen plastids ar...
Self-pollination occurs in many species, but in the others, perhaps the majority, it is prevented by such adaptations as the structure of the flower, self-incompatibility, and the maturation of stamens and pistils of the same flower or plant at different times. Cross-pollination may be ...
Human activities associated with large-scale farms and the monocultures expose honey bees to one type of food. Moreover, there is an ongoing decline of plant species producing pollen and nectar in Europe. A poorly balanced diet affects a number of proces
curcas pollen viability?; (3) What is the optimum medium for in vitro pollen germination and pollen tube growth?; and (4) Is there any evidence that IAA plays a role in enhancing pollen germination and pollen tube growth in this plant? 2. Materials and methods 2.1. Study species Jatropha...
Thus it is far-fetched to conclude that what is recorded in a single study conducted in a single stand is the gene flow rate characteristic of a species. The number of publications comparing gene flow patterns between different conditions is increasing. However, to date the comparison of ...