Journal
ACTA PHYSIOLOGIAE PLANTARUM
Volume 35, Issue 7, Pages 2289-2297Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11738-013-1266-1
Keywords
Barley; Dehydrin; Gene expression; Osmotic adjustment; Terminal drought stress
Categories
Funding
- Iran National Science Foundation (Iranian Deputy of Science and Technology)
Ask authors/readers for more resources
Dehydrins are one of the characteristic families of plant proteins that usually accumulate in response to drought. In the present study, gene expressions of dehydrin multigene family (13 genes) were examined in flag leaves of tolerant (Yousef) and susceptible (Moroco) barley varieties under terminal drought to characterize the involvement of dehydrins in the adaptive processes. The stomatal conductance, RWC, and Chl a, b contents had more reduction in Moroco than the Yousef which has more elevated osmotic adjustment. Drought stress increased significantly MDA and electrolyte leakage levels, but greater in Moroco, indicating a poor protection of cell and cytoplasmic membrane in this variety. Yousef variety had no reduction in grain yield under drought condition. Five genes (Dhn1, Dhn3, Dhn5, Dhn7 and Dhn9) were exclusively induced in Yousef under drought stress. In the stress condition, relative gene expression of Dhn3, Dhn9 had the direct correlations (P < 0.05) with Chl a, b contents, osmotic adjustment, stomatal conductance, plant biomass and grain yield, and the negative correlations (P < 0.05) with MDA and electrolyte leakage levels. The results supported the impending functional roles of dehydrin K-n and particularly YnSKn types in dehydration tolerance of barley during the reproductive stage.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available