Studies on genetic male-sterile soybeans. V. Effects of male-sterility on the function and glycerolipid composition of chloroplast thylakoids

Soybean (Glycine max L. Merr.) germplasm, isogenic except for loci controlling male sterility ($ms_{1}$), was utilized to study the effects of reproductive development on certain aspects of photosynthesis. Plants were sampled at various times between flowering (77 days after transplanting) and matur...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 1987-08, Vol.84 (4), p.1357-1360
Main Authors: Burke, J.J, Kalt-Torres, W, Burton, J.W, Wilson, R.F
Format: Article
Language:English
Subjects:
Chloroplasts
ESTERILIDAD MASCULINA
FOTOSINTESIS
GENOTIPOS
GENOTYPE
GENOTYPES
GLYCINE MAX
Leaves
LIPIDE
LIPIDOS
LIPIDS
MALE INFERTILITY
Nitrogen
PHOTOSYNTHESE
PHOTOSYNTHESIS
Plant genetics
Plants
PLASTE
PLASTIDIOS
PLASTIDS
REPRODUCCION
REPRODUCTION
Soybeans
STERILITE MALE
Thylakoids
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Summary:Soybean (Glycine max L. Merr.) germplasm, isogenic except for loci controlling male sterility ($ms_{1}$), was utilized to study the effects of reproductive development on certain aspects of photosynthesis. Plants were sampled at various times between flowering (77 days after transplanting) and maturity (147 days after transplanting). During that period photosynthetic rates declined more rapidly in the male-sterile genotypes than male-fertile genotypes; and after 105 days, the sterile genotypes maintained low but relatively constant carbon exchange rates. The decline of leaf photosynthesis in the male-sterile genotype occurred concomitantly with an inhibition of the photosynthetic electron transport chain associated with photosystem II. Changes in photosystem I activities, cytochrome f levels, and chlorophyll a/b ratios per se were not responsible for the decline in whole leaf photosynthesis. These conditions were independent of the source of nitrogen nutrition. Lipid analyses of the thylakoids revealed that a loss of phosphatidylglycerol was highly correlated with the inhibition of photosystem II activity. These results suggested a relation between the decline in leaf carbon exchange and the decline in photosynthetic electron transport activity.
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.84.4.1357