Transgenic tomato overexpressing ath-miR399d improves growth under abiotic stress conditions

Transgenic tomato overexpressing ath-miR399d improves growth under abiotic stress conditions Phosphorus (P) is an essential element required for plant growth and development. Abiotic stresses, such as cold and P deficiency cause adverse effects on growth of plants, inhibit accumulation or translocation of mineral nutrients such as P, and often constrain the productivity and quality of crops. miR399 as a long-distance signal controls systemic phosphate homeostasis by modulating phosphate uptake and transport. However, overexpression of miR399 causes P toxicity and results in retarded growth. Thus, we constructed a transgenic tomato (Solanum lycopersicum L., C1), which contains foreign gene ath-miR399d under the control of rd29A promoter. In the transgenic C1 expression of the miR399d gene showed a stress-inducible pattern. Results showed that miR399d was moderately up-regulated in response to salinity and cold stresses. In soil, dry weight was enhanced in transgenic tomato under low temperature and P deficiency conditions. The transgenic tomato has potential to improve growth when it is exposed to other abiotic stresses such as salinity and drought. Russian Journal of Plant Physiology Springer Journals

Transgenic tomato overexpressing ath-miR399d improves growth under abiotic stress conditions

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Pleiades Publishing
Copyright © 2015 by Pleiades Publishing, Ltd.
Life Sciences; Plant Physiology; Plant Sciences
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