Effect of Iron Deficiency Induced Changes on Photosynthetic Pigments, Ribulose-1,5-Bisphosphate Carboxylase, and Photosystem Activities in Field Grown Grapevine (Vitis Vinifera L. cv. Pinot Noir) Leaves
作者： M. Bertamini , N. Nedunchezhian , B. Borghi
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摘要: The effect of iron deficiency on photosynthetic pigments, ribulose-1,5-bisphosphate carboxylase (RuBPC), and photosystem activities were investigated in field grown grapevine (Vitis vinifera L. cv. Pinot noir) leaves. contents chlorophyll (Chl) (a+b) carotenoids per unit fresh mass showed a progressive decrease upon increase deficiency. Similar results also observed content total soluble proteins RuBPC activity. marked loss large (55 kDa) small (15 subunits was severely chlorotic However, when various electron transport analysed isolated thylakoids, major the rate whole chain (H2O → methyl viologen) deficient Such reduction mainly due to 2 (PS2) same obtained Fv/Fm evaluated by Chl fluorescence measurements Smaller inhibition 1 (PS1) activity both mild artificial donors, diphenyl carbazide NH2OH, markedly restored PS2 evidently 33, 23, 28-25, 17 kDa polypeptides
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