Responses of isoprene emission and photochemical efficiency to severe drought combined with prolonged hot weather in hybrid Populus.

ABSTRACT: Isoprene emissions have been considered as a protective response of plants to heat stress, but there is limited information of how prolonged heat spells affect isoprene emission capacity, particularly under the drought conditions that often accompany hot weather. Under combined long-term stresses, presence of isoprene emission could contribute to the maintenance of the precursor pool for rapid synthesis of essential isoprenoids to repair damaged components of leaf photosynthetic apparatus. We studied changes in leaf isoprene emission rate, photosynthetic characteristics, and antioxidant enzyme activities in two hybrid Populus clones, Nanlin 1388 (relatively high drought tolerance) and Nanlin 895 (relatively high thermotolerance) that were subjected to long-term (30 d) soil water stress (25

SUBMITTER: Sun Z 

PROVIDER: S-EPMC7906789 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature