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1
題名:Salt-Stress Induces Lipid Degradation and Lipid Phase Transition in Plasma Membrane of Soybean Plants    
鹽逆境使大豆幼苗細胞膜中脂質分解及脂質相的改變
著者:Huang Chi-Ying(黃啟穎)
出版地區:台灣
出版城市:台北市
學科:生命科學
刊名:Taiwania
卷期:41卷2期(1996.6)
頁碼:96-104
語言:英語
摘要: 中文摘要PDF ; 英文摘要PDF

大豆生長於鹽逆境情況下,其葉細胞朕中磷脂濃度比酷脂及中性脂的濃度高。而磷 脂中戶牙含的飽和脂肪酸濃度增加,而不飽和脂肪酸的濃度反而相對減低。不飽和脂肪 酸濃度的減低與Lipoxygenase 活性的增加有關。由於鹽逆境情況下,比酵素分解不飽 和脂肪竣活性的增加,及飽和脂肪股濃度的提高,使飽和脂肪酸的濃度與不飽和脂肪酸 的濃度的比例增加。另外細胞脹的脂質Enthalpy 也有增加的現象。這些結果顯示出, 大豆生長於鹽逆境情況下其脂質相有改變的現象,也就是細胞膜有固體化的現象。而 此細胞脹的固體化作用,導致細胞失去其對水分或養分滲透壓的調控作用,這才是致使 植物不能生長於鹽逆境土壤中的主要因素。
Soybean seedlings were grown lInder NaC 卜stress and non吟tress conditions.τo indllce salt stre俗, the water potential of Hoagland solution, which was used to clIlture the soybean plants, was adjllsted to -1.6 MPa daily with saturated NaCl sollltion. Leaf plasma membranes were isolated and assayed for lipid content, phospholipid class composition, and the fatty acid composition of total phospholipids of plasma m巴mbranes. Lipid phase transition temperature and lipoxygenase activity were also measured. The plasma membrane contained a higher concentration of phospholipid than that of glycolipid. The phospholipid(PL) contained higher contcnts of saturat巴d fatty acids than that of lInsatllrated fatty acids. Under salt-stress, the ratio of saturated/unsaturated fatty acids became higher, and the enthalpy of lipid phase transition in leaf plasma membranes was raised . A large increase in the lipoxygenase activity in salt-stressed plasma membranes may have contributed to the decline in PL. These results sllggest that the plasma membrane of leaves from soybean plants grown lInder the salt-stress became solidified, and this solidification of the plasma membrane might be the limiting factor that restricts plant growth under salt恥slr巴ss environments.


    

本卷期目次
Taiwania 41卷2期 (1996.6)
Morphology and Zoospore Ultrastructure of Rhizophydium macroporosum (Chytridiales)/ Shu-Fen ChenChiu-Yuan Chien
New Taxa of Cruciferae in China/ Ji-Zhou SunKuo-Liang ChangHua-Li Huang
Additional Remarks on Ranunculaceae in Taiwan (6)--Some genera in Taiwan/ T. Y. Aleck YangTseng-chieng Huang
Notes on the Genus Taxillus Van Tieghem (Loranthaceae) in Taiwan/ Shau-Ting Chiu
A Taxonomic Evaluation of Lotus corniculatus Linn. (Leguminosae-Papilionoideae) in India/ L. B. Chaudhary
Notes on the Flora of Taiwan (23)--The Genus Teucrium L. (Lamiaceae)/ Tsung-Hsin HsiehTseng-chieng Huang
Physarum taiwanianum sp. nov./ Chao-Hsuan ChungChin-Hui Liu
Salt-Stress Induces Lipid Degradation and Lipid Phase Transition in Plasma Membrane of Soybean Plants/ Huang Chi-Ying
 
   
 
   

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