Why do pollen grains move faster when the temperature increases?
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Brownian Motion - Mr. Robert Brown, a Scottish botanist observed the random movement of pollen grains in water in 1827, it is called Brownian motion. ... Pollen grains move faster in warm water, because particles of warm water move more rapidly.
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In both cases, the pollen grain must be deposited on the stigma and emit the pollen tube. ... It has been observed that an increase in temperature produces both a faster growth of the pollen tube, and an acceleration of the ovule degeneration (Hedhly, Hormaza & Herrero, 2005)
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