Effective carbon partitioning driven by exotic phloem-specific regulatory elements fused to the Arabidopsis thaliana AtSUC2 sucrose-proton symporter gene |
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Authors: | Avinash C Srivastava Savita Ganesan Ihab O Ismail Brian G Ayre |
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Affiliation: | (1) University of North Texas, Department of Biological Sciences, PO Box 305220, Denton, TX 76203 5220, USA;(2) Samuel Roberts Noble Foundation, Plant Biology Division, Ardmore, OK 73401, USA;(3) Amyris Biotechnologies, Inc, Emeryville, CA 94608, USA |
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Abstract: | Background AtSUC2 (At1g22710) from Arabidopsis thaliana encodes a phloem-localized sucrose/proton symporter required for efficient photoassimilate transport from source tissues to sink tissues. AtSUC2 plays a key role in coordinating the demands of sink tissues with the output capacity of source leaves, and in maintaining phloem hydrostatic pressure during changes in plant-water balance. Expression and activity are regulated, both positively and negatively, by developmental (sink to source transition) and environmental cues, including light, diurnal changes, photoassimilate levels, turgor pressure, drought and osmotic stress, and hormones. |
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