Premium
BLUE AND WHITE LIGHT EFFECTS ON CHLOROPLAST DEVELOPMENT IN A SOYBEAN MUTANT
Author(s) -
Duysen Murray,
Eskins Kenneth,
Dybas Linda
Publication year - 1985
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1985.tb03621.x
Subject(s) - thylakoid , chloroplast , mutant , neoxanthin , pigment , blue light , biology , chemistry , biophysics , botany , biochemistry , gene , optics , carotenoid , zeaxanthin , physics , organic chemistry , lutein
— Phenotypic difference for chloroplast development between the normal green (CL1) and the Cy 9 y 9 soybean mutant was observed when the plants were grown under 18W m −2 white or blue light. Under these conditions the mutant soybean accumulated less Chi b, neoxanthin, carotene and less total pigment than the CL1 genotype. Chloroplasts of the Cy 9 y 9 line were deficient in the LHP complex relative to that of chloroplasts from the normal soybean. Specific differences were noted between chloroplasts from plants grown under blue and white light. Accumulations of a 34 kD (PSII) and a 16–17 kD (PSI) membrane polypeptide were decreased by blue light in both soybean genotypes. Blue light induced a greater accumulation of a 32 kD (PSII) polypeptide than white light. Blue light reduced granal thylakoid stacking and increased the proportion of stroma thylakoids compared to those that developed under white light. PSI electron transport activity was stimulated by the blue light treatment more than that of PSII.