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Effect of copper deficiency on photosynthetic electron transport in wheat plants
Author(s) -
Casimiro Adalcina,
Barroso José,
Pais Maria Salomé
Publication year - 1990
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1990.tb02103.x
Subject(s) - photosynthesis , chloroplast , rubisco , thylakoid , electron transport chain , copper deficiency , copper , chemistry , botany , photosystem ii , biology , biochemistry , organic chemistry , gene
Copper deficiency in wheat ( Triticum aestivum L. cv. Nazareno Stramppeli) markedly affects photosynthetic activity. Flag leaves of copper‐deficient plants showed a 50% reduction of the photosynthetic rate expressed as mg CO 2 dm −2 h −1 . The activities of PSI and PSII, determined for isolated chloroplasts, as well as fluorescence measurements on intact leaves of copper‐deficient plants, indicated a low activity of photosynthetic electron transport. Ribulose bisphosphate carboxylase/oxygenase (Rubisco) activity was not affected by copper deficiency but copper deficiency affected the chloroplast ultrastructure, especially at the level of grana, where a disorganization of thylakoids is evident.