Pigmentation of petals has received substantial attention, but not many know about pollen pigmentation.
A new Phytologist study of the North American herb Campanula Americana revealed that western populations have darker purple pollen due to extremely high temperatures than eastern populations where white to light-purple pollen is more common.
Western populations also experience more extreme high temperatures and elevated UV-B irradiance.
The research appears in New Phytologist journal.
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