J Integr Plant Biol. ›› 1997, Vol. 39 ›› Issue (12): -.

• Research Articles •    

Effects of Chilling Injury on the Thylakoid Membrane of Cucumber Chloroplasts

Xu Chun-hui, Chen Zhi-qiang, Wang Ke-bin, Zhao Fu-hong, Lin Shi-qing, Tang Chong-qin and Kuang Ting-yun   

Abstract: Some changes in the components of cucumber ( Cucumis sativus L. ) thylakoid membrane occurred before any visible chilling injury appeared when cucumber leaves were treated with chilling temperature (0 ℃, 16 h). Chilling temperature induced a specific decrease of phosphatidyl glycerol (PG) content accompanied with an increase of PS Ⅱ light-harvesting chlorophyll a/b-protein com- plex (LHC Ⅱ ) monomer content and a decrease of LHC II oligomer content in the thylakoid membrane. It also had a significant effect on the content of lipids and the fatty acid composition of each of lipid class of purified LHC Ⅱ . The PG content decreased obviously and the content of other lipid classes increased. The fatty acid composition of each lipid class from purified LHC Ⅱ was also affected. The results suggested that the changes in PG content and LHC Ⅱ supermolecular structure might be the primary indications of chilling injury.

Key words: Chilling injury, Thylakoid membrane, Membrane hpids, Membrane protein

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