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Phospholipase D delta regulates pollen tube growth by modulating actin cytoskeleton organization in Arabidopsis

文献类型： 外文期刊

作者： Jia, Qianru 1 ; Zhang, Shujuan 1 ; Lin, Yaoxi 1 ; Zhang, Jixiu 1 ; Li, Li 2 ; Chen, Huatao 4 ; Zhang, Qun 1 ;

作者机构： 1.Nanjing Agr Univ, Coll Life Sci, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing Weigang Rd 1,Coll Life Sci 48, Nanjing 210095, Jiangsu, Peoples R China

2.Inst Bot, Nanjing, Jiangsu, Peoples R China

3.Chinese Acad Sci, Nanjing Bot Garden Mem Sun Yat Sen, Nanjing, Peoples R China

4.Jiangsu Acad Agr Sci, Inst Ind Crops, Nanjing, Peoples R China

关键词： Phospholipase D; pollen tube; actin; Arabidopsis

期刊名称：PLANT SIGNALING & BEHAVIOR （ 影响因子：1.671； ）

ISSN： 1559-2316

年卷期：

页码：

收录情况： SCI

摘要： The actin cytoskeleton plays pivotal roles in pollen tube growth by regulating organelle movement, cytoplasmic streaming, and vesicle trafficking. Previous studies have reported that plasma membrane-localized phospholipase D delta (PLD delta) binds to cortical microtubules and negatively regulates plant stress tolerance. However, it remains unknown whether or how PLD delta regulates microfilament organization. In this study, we found that loss of PLD delta function led to a significant increase in pollen tube growth, whereas PLD delta overexpression resulted in pollen tube growth inhibition. We also found that wild-type PLD delta, rather than Arg 622-mutated PLD delta, complemented the pld delta phenotype in pollen tubes. In vitro biochemical assays demonstrated that PLD delta binds directly to F-actin, and immunofluorescence assays revealed that PLD delta in pollen tubes influences actin organization. Together, these results suggest that PLD delta participates in the development of pollen tube growth by organizing actin filaments.

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