AtRAV1 and AtRAV2 Overexpression in Cotton Increases Fiber Length and Delays Flowering under Drought StressNovember 4, 2015
To understand drought stress signaling and adaptation in cotton (Gossypium hirsutum) fiber development, a research team led by Amandeep Mittal of Texas Tech University overexpressed the Arabidopsis genes AtRAV1 and AtRAV2 in cotton. These genes are known to repress transcription of FLOWERING_LOCUS_T (FT) and promote stomatal opening cell-autonomously.
AtRAV1 and AtRAV2-overexpressing cotton had significantly longer fibers with only marginal decreases in yields under well-watered or drought stress conditions. The longer transgenic fibers from drought-stressed transgenics were stronger and more uniform than fibers from well-watered control plants.
The transgenic AtRAV1 and AtRAV2 lines also flowered late and retained bolls at higher nodes, which correlated with repression of endogenous GhFT-Like (FTL) transcript accumulation. The results show that altered expression of RAVs has the potential for phenotypic modification of crops.
To learn more, read the article in Plant Science.
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