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- W2551777680 abstract "Phospholipase D (PLD) hydrolyzes phospholipids to generate a free polar head group (e.g., choline) and a second messenger phosphatidic acid and plays diverse roles in plant growth and development, including seed germination, leaf senescence, root hair growth, and hypocotyl elongation. However, the function of PLD in cotton remains largely unexplored. Here, the comprehensive molecular characterization of GhPLDα1 was explored with its role in upland cotton (Gossypium hirsutum) fiber development. The GhPLDα1 gene was cloned successfully, and a sequence alignment showed that GhPLDα1 contains one C2 domain and two HKD (HxKxxxxD) domains. Quantitative reverse transcriptase-polymerase chain reaction measured the expression of GhPLDα1 in various cotton tissues with the highest level in fibers at 20 days post anthesis (d.p.a.). Fluorescent microscopy and immunoblotting in tobacco epidermis showed the GhPLDα1 distribution in both cell membranes and the cytoplasm. An activity assay indicated changes in PLDα enzyme activity in developing fiber cells with a peak level at 20 d.p.a., coinciding with the onset of cellulose accumulation and the increased H2O2 content during fiber development. Furthermore, the inhibition of PLDα activity obviously decreased the cellulose and H2O2 contents of in vitro-cultured cotton fibers. These results provide important evidence explaining the relationship of GhPLDα1 with secondary cell wall thickening in cotton fibers in that GhPLDα1 may correlate with the increased H2O2 content at the onset of secondary cell wall thickening, ultimately promoting cellulose biosynthesis." @default.
- W2551777680 created "2016-11-30" @default.
- W2551777680 creator A5015413405 @default.
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- W2551777680 date "2017-01-01" @default.
- W2551777680 modified "2023-10-09" @default.
- W2551777680 title "Molecular characterization of GhPLDα1 and its relationship with secondary cell wall thickening in cotton fibers" @default.
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- W2551777680 doi "https://doi.org/10.1093/abbs/gmw113" @default.
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