There's great variation when it comes to the size of pollen grains, and there's no correlation between the size of the plant and the size of the pollen it produces. Large male and female plants might generate some of the tiniest grains of pollen, while diminutive plants may yield pollen ...
Pollen is the male sperm producing gametophyte of a plant. A pollen grain contains both non-reproductive cells, known as vegetative cells and a reproductive or generative cell. In flowering plants, pollen is produced in the anther of the flower stamen. In conifers, pollen is produced in t...
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 are in this process remain obscure. To investigate...
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 anther of flower-bearing plants (angiosperms) or in the microsporangia of gymnosperms. The structure of pollen ...
Regardless of the pollen intake, the bees’ fat body cells had greater energy reserves in the form glucose, glycogen, triglycerides and protein than those of the bees in the control group. The values of these biochemical parameters were usually higher in bees fed with candy + pollen. ...
Nettles actually contain small amounts of hista- mine, the very substance that is released by the mast cells that produces the allergy symptoms. Nettles also contain formic acid, the same stuff that produces the redness and swelling in an ant bite. So, nettles is another example of like ...
Focusing efforts to control this weed earlier in the season, before it produces pollen, could potentially help to reduce the reappearance of this weed in subsequent seasons and help to limit the transfer of herbicide resistance genes by wind- or insect-assisted pollination. The brief period when ...
which differ from the phenotype of XYA. These findings suggest that JA plays a significant role in rice male sterility and control various traits. The biosynthesis of JA is initiated in plastids by the lipase defective in anther dehiscence 1 (DAD1), which produces α-linolenic acid. Subsequentl...
Due to regional urbanization-induced temperature and higher CO2 levels in cities ragweed grows faster, flowers earlier, and produces significantly greater ragweed pollen in urban than rural areas (Bergmann et al., 2012; Ziska et al., 2003). Epidemiological studies have demonstrated that urbanization,...
The FATB gene also produces free fatty acids for sporopollenin biosyn- thesis47. The ACC1 fatty acid biosynthesis gene (ES840243) catalyses the rate-limiting step of fatty acid de novo biosynthesis48. The ENR1 fatty acid biosynthesis gene is a subunit of the fatty acid synthase complex49....