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A correlation in plastid development and cytoplasmic ultrastructure with nuclear gene expression during seed ripening in soybean
Author(s) -
SAITO G. Y.,
CHANG Y. C.,
WALLING L. L.,
THOMSON W. W.
Publication year - 1989
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1989.tb00357.x
Subject(s) - chloroplast , plastid , greening , thylakoid , biology , ripening , ultrastructure , gene expression , nuclear gene , chlorophyll , botany , microbiology and biotechnology , chlorophyll a , gene , cytoplasm , embryo , photosynthesis , genome , genetics , ecology
S ummary With greening of soybean embryos during seed ripening, increased granal stacking directly correlates with decreasing chlorophyll a/b ratios. However, the intergranal fret system that is normally observed in chloroplasts is minimally developed during embryogenesis. Transitions in chloroplast development were correlated with coincident transitions in cellular ultrastructure. Levels of chlorophyll a/b binding protein mRNAs decreased prior to chloroplast dedifferentiation to eoplast during seed maturation. This suggests that the availability of chlorophyll a/b binding proteins is essential for maintenance of thylakoid appression and stacking against derivative processes.