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Fatty Acid and Chlorophyll Levels of Coastal Bermudagrass during the Day and during Maturation
Author(s) -
CHAPMAN GLENN W.,
ROBERTSON JAMES A.,
BURDICK DONALD
Publication year - 1976
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.1399-3054.1976.tb05029.x
Subject(s) - cynodon dactylon , fatty acid , dry weight , sunrise , zoology , chlorophyll a , chlorophyll , biology , sunset , chemistry , agronomy , botany , biochemistry , physics , astronomy , geology , atmospheric sciences
Lipids were extracted from fresh, field‐grown coastal bermudagrass ( Cynodon dactylon (L.) Pers.) and the fatty acids determined by gas chromatography. Total fatty acid levels (dry weight basis) increased during the day and reached a single maximum at sunset in 2‐week‐old grass; whereas, in older grass, the fluctuations in fatty acid levels showed two maxima. The first maximum occurred 4 h after sunrise and the second maximum occurred at sunset. Total fatty acid levels, based on dry weight, decreased during the first 6 weeks of growth and changed very little after an additional 4 weeks' growth in bermudagrass leaf blades. Chlorophyll levels (dry weight basis) continuously decreased during the entire growth period (10 weeks). Chlorophyll alb ratios increased at sunset in 2‐ and 6‐week‐old grass, but this ratio did not change during the day in subsequent growth stages. The results of these experiments show that stages of maturity affected fatty acid fluctuations during the day as well as total fatty acid and chlorophyll levels in Coastal bermudagrass leaf blades. Chlorophyll alb ratios varied independently of fatty acid levels.

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