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Carbohydrate distribution via SWEET17 is critical for Arabidopsis inflorescence branching under drought.
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- Author(s): Valifard, Marzieh; Khan, Azkia; Berg, Johannes; Hir, Rozenn Le; Pommerrenig, Benjamin; Neuhaus, H Ekkehard; Keller, Isabel
- Source:
Journal of Experimental Botany; 7/10/2024, Vol. 75 Issue 13, p3903-3919, 17p- Subject Terms:
- Source:
- Additional Information
- Abstract: Sugars Will Eventually be Exported Transporters (SWEETs) are the most recently discovered family of plant sugar transporters. By acting as uniporters, SWEETs facilitate the diffusion of sugars across cell membranes and play an important role in various physiological processes such as abiotic stress adaptation. At SWEET17, a vacuolar fructose facilitator, was shown to be involved in the modulation of the root system during drought. In addition, previous studies have shown that overexpression of an apple homolog leads to increased drought tolerance in tomato plants. Therefore, SWEET17 might be a molecular element involved in plant responses to drought. However, the role and function of SWEET17 in above-ground tissues of Arabidopsis under drought stress remain elusive. By combining gene expression analysis and stem architecture with the sugar profiles of different above-ground tissues, we uncovered a putative role for SWEET17 in carbohydrate supply and thus cauline branch elongation, especially during periods of carbon limitation, as occurs under drought stress. Thus, SWEET17 seems to be involved in maintaining efficient plant reproduction under drought stress conditions. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Journal of Experimental Botany is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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