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Development Changes in Fine Structure of Starches of Several Endosperm Mutants of Maize
Author(s) -
Inouchi N.,
Glover D. V.,
Takaya T.,
Fuwa H.
Publication year - 1983
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.19830351102
Subject(s) - amylopectin , endosperm , amylose , isoamylase , chemistry , starch , polysaccharide , food science , biochemistry , amylase , enzyme
Distribution of components of maize starches from several endosperm mutants sampled at three stages of development were investigated by gel filtration after debranching by isoamylase. The waxy (wx) starches consisted of only amylopectin, and the distribution of components did not change during development. In other starches: normal, amylose‐extender (ae), dull (du), sugary ‐1 ( su 1 ) and sugary ‐2 ( su 2 ) starches, amylose contents increased during the 20–35 days after pollination (DAP) period of development. The ae, du, su 1 and su 2 mutants produced high‐amylose starches, while amylopectin of su 2 was normal type and those of ae, du and su 1 were novel type, and ae starches possessed longer average chain‐lengths of amylopectin. Phytoglycogens were prepared from su 1 kernels during development and their characteristics were compared with those of su 1 starches. The characteristics of phytoglycogens did not change during the developmental phase studied and the average chain‐lengths of phytoglycogens were shorter than those of amylopectin of su 1 starches at each stage of development.