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Morphological changes of starch granules during grain filling and seed germination in wheat
Author(s) -
Li Chun Yan,
Li Cheng,
Lu Zhen Xiang,
Li Wei Hua,
Cao Lian Pu
Publication year - 2012
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.201100093
Subject(s) - endosperm , germination , anthesis , granule (geology) , starch , scanning electron microscope , wheat starch , chemistry , caryopsis , botany , hydrolysis , enzymatic hydrolysis , agronomy , materials science , food science , biology , composite material , cultivar , biochemistry
In this study, the morphological changes of wheat starch granules during grain filling and seed germination were observed under scanning electron microscopy. Until 3 days post anthesis (DPA), the pericarp tissue was the major site of starch deposited. From 6 DPA, the size and the number of granules in endosperm gradually increased. The “double disk structure”, “pin holes”, and “equatorial groove” at the surfaces of the granules were observed during grain filling, these micro‐structural features might aid the enzymatic hydrolysis of starch granules during seed germination. The equatorial groove of granule was more susceptible to enzymatic hydrolysis than the flat surface.