Biologia plantarum 51:340-342, 2007 | DOI: 10.1007/s10535-007-0067-z
Transgenic rice tolerant to high temperature with elevated contents of dienoic fatty acids
- 1 Department of Molecular Biotechnology (BK21 Program), Agricultural Plant Stress Research Center, Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, South Korea
Transgenic rice plants in which the content of dienoic fatty acids was increased as a result of co-suppression of fatty acid desaturase were more tolerant to high temperatures than untransformed wild-type plants, as judged by growth rate and chlorophyll content. When untransformed wild-type and transgenic rice seedlings were incubated at 35 °C, seedlings of the transgenic rice lines showed approximately 1.6 and 2.1 times the growth of untransformed wild-type seedlings, as assayed by shoot and root mass, respectively. The chlorophyll content of the transgenic leaves after 9 d at 35 °C was also higher than that of wild-type rice. The maximum photochemical efficiency of photosystem 2 was also higher in transgenic plants than in wild-type plants upon high temperature stress.
Keywords: chlorophyll content; fatty acid desaturase; heat stress; photochemical efficiency
Received: June 15, 2004; Accepted: August 25, 2006; Published: June 1, 2007 Show citation
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