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Author Sera Y., Hanamata S., Sakamoto S., Ono S., Kaneko K., Mitsui Y., Koyano T., Fujita N., Sasou A., Masumura T., Saji H., Nonomura K.I., Mitsuda N., Mitsui T., Kurusu T., Kuchitsu K.
Title Essential roles of autophagy in metabolic regulation in endosperm development during rice seed maturation.
Abstract:
Autophagy plays crucial roles in the recycling of metabolites, and is involved in many developmental processes. Rice mutants defective in autophagy are male sterile due to immature pollens, indicating its critical role in pollen development. However, physiological roles of autophagy during seed maturation had remained unknown. We here found that seeds of the rice autophagy-deficient mutant Osatg7-1, that produces seeds at a very low frequency in paddy fields, are smaller and show chalky appearance and lower starch content in the endosperm at the mature stage under normal growth condition. We comprehensively analyzed the effects of disruption of autophagy on biochemical properties, proteome and seed quality, and found an abnormal activation of starch degradation pathways including accumulation of alpha-amylases in the endosperm during seed maturation in Osatg7-1. These results indicate critical involvement of autophagy in metabolic regulation in the endosperm of rice, and provide insights into novel autophagy-mediated regulation of starch metabolism during seed maturation.
Journal Sci Rep
Country Japan
Volume 9(1)
Pages 18544
Year 2019
PubMed ID 31811157
PubMed Central ID 6898296
DOI 10.1038/s41598-019-54361-1
URL -
Relation
Gene AGPL1 AGPS2 ALK AMY1A AMY3A AMY3D ATG7 HSP101 HSP16.9C HSP17.9A LEA16 LEA17 LEA3-1 RSUS1 RSUS3 SBE1 SBE3 SSI
INSD -
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
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Stages in Each Organ
- Muant Lines (Gene)
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Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
/rice/oryzabase