Chloroplast pigments

Chloroplast pigments 303 Chloropropham 108 Chloropropionic acid 45 Chlorothymol 67 a-Cholestanol 43,65 5-a-Cholestan-3-one 43, 334—336, 421, 422... 

Roca, M. and Mmguez-Mosquera, M.I., Changes in chloroplast pigments of olive varieties during fruit ripening, J. Agric. Food Chem., 49, 832, 2001. 

Tswett, M. Separated chloroplast pigments on CaCOg solid phase and petroleum ether liquid phase. 

H. H. Strain, Chloroplast Pigments and Chromatographic Analysis. Penn. State Univ. Press, University Park, Pennsylvania, 1958. 

Separation and Assay. H.p.l.c. methods have been described for the determination of chloroplast pigments,phytoplankton pigments,and provitamin A carotenoids in tomatoes.Other chromatographic procedures have been devised for the separation of Capsicum carotenoids and chloroplast pigments from tobacco mutants, " and methods for the high-speed video-densitometric determination of carotenoids separated by t.l.c., and for the dual assay of carotenoids and vitamin A in human liver have been reported. H.p.l.c. has been used for the separation of cis-trans-isomers of retinal, retinol and retinyl... 

Substituted pyridazinone herbicides directly inhibit photosystem II, chloroplast pigment biosynthesis, and membrane lipid biosynthesis. Depending on the substitution, pyridazinones can specifically inhibit the synthesis of linolenic acid in galacto-lipids and phospholipids preferentially alter the fatty acid composition of monogalactosyl diglycerides compared with digalactosyl diglycerides and cause a build-up of saturated fatty acids in the chloroplast membranes. 

S3mthetic functions (1 ). The second site involves interference with the accumulation of chloroplast pigments and the third site involves interference with the formation of chloroplast glycero-lipids (, . The molecular structures used most frequently to... 

Effect of substituted pyridazinones on chloroplast pigment accumulation in 4-day-old wheat shoots (2). 

Pyrazon inhibited PS II (Table I) but did not interfere with the accumulation of chloroplast pigments (Table II) or influence the composition of glycerolipids (Table III). Therefore, even though the other substituted pyridazinones also inhibit PS II, their actions on chloroplast pigments and/or glycerolipids are not likely to result from PS II inhibitions. Further evidence that inhibition of PS II does not result in membrane lipid changes is presented in Table IV. 

Therefore, we wanted to examine the influence of certain combinations of N, P and K in three wheat cultivars, on the content of chloroplast pigments leaving, all other conditions constant during the growth of plants. 

The obtained results have shown that the content of chloroplast pigments had been different depending on the combinations of N, P, and K. Nitrogen has demonstrated a dominant significance in all cultivars. 

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