Transgenic rice tolerant to high temperature with elevated contents of dienoic fatty acids |
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Authors: | S O Sohn K Back |
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Institution: | (1) School of Life Sciences and Biotechnology, Kyungpook National University, Daegu, 702-701, Republic of Korea;(2) Institute of Biology/Plant Physiology, Humboldt University, Philippstrasse 13, Building 12, 10155 Berlin, Germany;(3) Department of Molecular Biotechnology, Biotechnology Research Institute, Agricultural Plant Stress Research Center, Chonnam National University, 300 Yongbong-dong, Puk-gu, Gwangju, 500-757, Republic of Korea; |
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Abstract: | 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. |
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