Photosynthetica 2004, 42(4):487-492 | DOI: 10.1007/S11099-005-0002-5

Effect of high irradiance and high temperature on chloroplast composition and structure of Dioscorea zingiberensis

F. Y. Liao1, H. M. Li2, P. He3
1 Environment and Art Design College, Central South Forestry University, Hunan, P.R. China
2 Ecology Institution of Jishou University, Hunan, P.R. China
3 China International Project Consultation Corporation, Beijing, P.R. China

High irradiance (HI) and high temperature (HT) increased in chloroplasts the content of monogalactosyldiacylglycerol (MGDG) and decreased the contents of digalactosyldiacylglycerol (DGDG), sulfoquinovosyldiacylglycerol (SQDG), and phosphatidylinositol (PI). HI and HT accelerated the transformation of DGDG to MGDG. The contents of unsaturated fatty acids in chloroplasts increased, while those of saturated fatty acids decreased. The contents of total carotenoids, neoxanthin, violaxanthin, lutein, and β-carotene increased first, then decreased. The content of chlorophyll decreased. HI caused the unfolding of thylakoids that was not resumed after a 72-h recovery.

Additional key words: carotenoids; chlorophylls; fatty acids; lipids; recovery

Received: September 10, 2003; Accepted: June 21, 2004; Published: December 1, 2004  Show citation

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Liao, F.Y., Li, H.M., & He, P. (2004). Effect of high irradiance and high temperature on chloroplast composition and structure of Dioscorea zingiberensis. Photosynthetica, 42(4), 487-492. doi: 10.1007/S11099-005-0002-5
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