Reproductive Stage Drought Tolerance in Wheat: Importance of Stomatal Conductance and Plant Growth Regulators.

ABSTRACT: Drought stress requires plants to adjust their water balance to maintain tissue water levels. Isohydric plants ('water-savers') typically achieve this through stomatal closure, while anisohydric plants ('water-wasters') use osmotic adjustment and maintain stomatal conductance. Isohydry or anisohydry allows plant species to adapt to different environments. In this paper we show that both mechanisms occur in bread wheat (Triticum aestivum L.). Wheat lines with reproductive drought-tolerance delay stomatal closure and are temporarily anisohydric, before closing stomata and become isohydric at higher threshold levels of drought stress. Drought-sensitive wheat is isohydric from the start of the drought treatment. The capacity of the drought-tolerant line to maintain stomatal conductance

SUBMITTER: Onyemaobi O 

PROVIDER: S-EPMC8623834 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature