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Author Liu G., Zhang K., Ai J., Su Y., Deng X., Hong Y., Wang X.
Title Patatin-related phospholipase A, pPLAIIIalpha, modulates the longitudinal growth of vegetative tissues and seeds in rice.
Patatin-related phospholipase A (pPLA) hydrolyses glycerolipids to produce fatty acids and lysoglycerolipids. The Oryza sativa genome has 21 putative pPLAs that are grouped into five subfamilies. Overexpression of OspPLAIIIalpha resulted in a dwarf phenotype with decreased length of rice stems, roots, leaves, seeds, panicles, and seeds, whereas OspPLAIIIalpha-knockout plants had longer panicles and seeds. OspPLAIIIalpha-overexpressing plants were less sensitive than wild-type and knockout plants to gibberellin-promoted seedling elongation. OspPLAIIIalpha overexpression and knockout had an opposite effect on the expression of the growth repressor SLENDER1 in the gibberellin signalling process. OspPLAIIIalpha-overexpressing plants had decreased mechanical strength and cellulose content, but exhibited increases in the expression of several cellulose synthase genes. These results indicate that OspPLAIIIalpha plays a role in rice vegetative and reproductive growth and that the constitutive, high activity of OspPLAIIIalpha suppresses cell elongation. The decreased gibberellin response in overexpressing plants is probably a result of the decreased ability to make cellulose for anisotropic cell expansion.
Journal J. Exp. Bot.
Country China
Year 2015
PubMed ID 26290597
PubMed Central ID -
DOI 10.1093/jxb/erv402
Gene BC6 BC7 CESA1 CESA7 CESA8 DEP3 GA2OX1 GID1 GNP1 SD1 SLR1 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
Stages in Each Organ
- Muant Lines (Gene)
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -