The transcriptome-identified gene HaSAPK3.8 of sunflower (Helianthus annuus L.) confers drought resistance in tobacco.

ABSTRACT:

Background

Sunflowers are often grown in arid or semi-arid areas, where their growth is frequently limited by water availability, leading to thin seedlings and reduced yields. In this study, two sunflower genotypes with contrasting drought tolerance were selected to investigate their physiological responses and transcriptomic differences under well-watered (0 h) and drought-stressed (48 h) conditions, followed by functional validation of key genes.

Results

Analysis of physiological and biochemical parameters revealed that ABA, antioxidant enzyme activities (SOD, POD, CAT), and the contents of osmoregulatory substances (Pro, SS) in both K55 and K58 were significantly higher under drought stress compared to the control. Transcriptome analysis identified 4,106 and 1,336 differe

SUBMITTER: Shi H 

PROVIDER: S-EPMC12752265 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature