Plant Science

Multifactorial response to drought

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Science  08 Dec 2017:
Vol. 358, Issue 6368, pp. 1267-1268
DOI: 10.1126/science.358.6368.1267-b

Drought is not just characteristic of the desert, but also occurs as transient dry spells in agricultural settings. Plants respond to drought by waterproofing their surfaces, closing pores, and adjusting internally, largely in response to the hormone abscisic acid. The hormones strigolactone, which triggers germination of parasitic plants, and karrikin, a component of smoke that triggers seed germination after fire, also promote tolerance to drought. The signaling pathways for strigolactone and karrikin converge on MAX2, which functions as part of the ubiquitin-regulated protein degradation system. Studying the small mustard relative Arabidopsis, Li et al. analyzed the cross-talk between signaling pathways for these three hormones that allow thirsty plants to survive.

PLOS Gen. 10.1371/journal.pgen.1007076 (2017).

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