期刊
BIOTECHNOLOGY LETTERS
卷 36, 期 8, 页码 1641-1648出版社
SPRINGER
DOI: 10.1007/s10529-014-1522-5
关键词
Glyceraldehyde-3-phosphate dehydrogenase; Osmotic potential; Physiological mechanism; Quantum yield; Rice; Salt tolerance; Stomatal conductance
资金
- Next-Generation Biogreen 21 Program [PJ009008, PJ008091]
- NAAS Agenda Program in Rural Development Administration, Suwon, Republic of Korea [PJ0100252014]
- Rural Development Administration (RDA), Republic of Korea [PJ008091012014, PJ010497012014] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Transgenic potatoes expressing glyceraldehyde-3-phosphate dehydrogenase (GPD), isolated from the oyster mushroom, Pleurotus sajor-caju, had increased tolerance to salt stress (Jeong et al. Biochem Biophys Res Commun 278:192-196, 2000). To examine the physiological mechanisms enhancing salt tolerance in GPD-transgenic rice plants, the salt tolerance of five GPD transgenic rice lines (T1-T5) derived from Dongjin rice cultivar were evaluated in a fixed 150 mM saline environment in comparison to two known wild-type rice cultivars, Dongjin (salt sensitive) and Pokali (salt tolerant). Transgenic lines, T2, T3, and T5, had a substantial increase in biomass and relative water content compared to Dongjin. Stomatal conductance and osmotic potential were higher in the GPD transgenic lines and were similar to those in Pokali. The results are discussed based on the comparative physiological response of GPD transgenic lines with those of the salt-sensitive and salt-tolerant rice cultivars.
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