Contrasted <i>NCED</i> gene expression across conifers with rising and peaking abscisic acid responses to drought.

ABSTRACT: Conifer trees have diverse strategies to cope with drought. They accumulate the plant hormone abscisic acid (ABA) following a range of profiles from constantly rising to peaking and falling (R- and P-type) with direct effect on foliar transpiration. The molecular basis of this adaptive diversification among species is largely unknown. Here, we analysed the sequences of candidate ABA biosynthesis and catabolism genes and monitored their expression in response to intensifying drought. We studied young trees from Cupressaceae, Pinaceae, and Taxaceae under controlled drought conditions and compared changes in water status, ABA profiles and gene-specific transcript levels. Our data indicate that R-type and P-type ABA profiles may be controlled by divergent expression of genes involved in the bi

SUBMITTER: Rizzuto G 

PROVIDER: S-EPMC11913745 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature