![]() ![]() "I started reading everything," Suissa said, "I read papers and books from 1960, then 1950, and all the way back to 19." He realized that scientists had long known about the timing of spore dispersal in the sensitive fern, but he could find nothing on what mechanism drove this phenology. Wanting to learn more, Suissa grabbed a handful of fronds off of the plant and returned home. ![]() ![]() It was on one of his walks, in late winter with the ground frozen, that he noticed a green plant from the previous summer was now a dead leaf sticking up out of the snow. When COVID-19 began Suissa could not access the labs to do his work so he took daily walks through Harvard's Arnold Arboretum. In a new study published in the Annals of Botany Jacob Suissa, PhD candidate in The Department of Organismic and Evolutionary Biology and Fellow of the Arnold Arboretum at Harvard University, reveals that the unique timing of spore dispersal in the sensitive fern, known as Onoclea sensibilis, is determined by a structural mechanism of humidity-driven movement in spore bearing leaves. ![]()
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