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Effect of carbon dioxide enrichment on chlorophyll content, starch content and starch grain structure in Trifolium subterraneum leaves
Author(s) -
Cave George,
Tolley Leslie C.,
Strain B. R.
Publication year - 1981
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.1399-3054.1981.tb02694.x
Subject(s) - starch , chlorophyll , trifolium subterraneum , photosynthesis , chlorophyll b , chloroplast , dry weight , chlorophyll a , agronomy , chemistry , carbon dioxide , botany , biology , horticulture , food science , pasture , biochemistry , gene , organic chemistry
Trifolium subterraneum (cv. Dinninup) responds to enriched atmospheric CO 2 in a manner similar to that described by Madsen (1968 and 1976) for tomato. In immature leaves, the total chlorophyll content per unit dry weight and the chlorophyll a:b ratio are significantly lower in plants grown at 0.10 vol% CO 2 . Although fully expanded mature leaves partially overcome the deficit in chlorophyll content, the chlorophyll a:b ratio remains substantially lower in these high CO 2 grown plants. The large amount of starch accumulated as irregularly shaped grains appears to disrupt normal chloroplast structure in clover plants grown in enriched atmospheric CO 2 . These results indicate the chlorotic appearance of leaves from high CO 2 grown clover plants is due to a decrease in chlorophyll content per dry weight possibly resulting from large starch grains and starch accumulation altering normal chloroplast structure and function.