The Plant Cell · 2022 · 27 citations · 90 references
Life SciencesPlant BiologyPlant SciencesPlant Cell BiologyPlant Developmental BiologyPlant Molecular BiologyLipid MetabolismOrganelle DynamicsRab Gtpase RegulationStomatal PhysiologyStomatal RegulationStomatal StructureGuard Cell MorphologyLipid Droplet MobilizationPlant Lipid MetabolismRab Gtpase FunctionSeipin FunctionStomatal MorphologyStomatal Response To LightVacuole Morphology
Lipid droplets (LDs) are evolutionarily conserved organelles that serve as hubs of cellular lipid and energy metabolism in virtually all organisms. Mobilization of LDs is important in light-induced stomatal opening. However, whether and how LDs are involved in stomatal development remains unknown. We show here that Arabidopsis thaliana LIPID DROPLETS AND STOMATA 1 (LDS1)/RABC1 (At1g43890) encodes a member of the Rab GTPase family that is involved in regulating LD dynamics and stomatal morphogenesis. The expression of RABC1 is coordinated with the different phases of stomatal development. RABC1 targets to the surface of LDs in response to oleic acid application in a RABC1GEF1-dependent manner. RABC1 physically interacts with SEIPIN2/3, two orthologues of mammalian seipin, which function in the formation of LDs. Disruption of RABC1, RABC1GEF1, or SEIPIN2/3 resulted in aberrantly large LDs, severe defects in guard cell vacuole morphology, and stomatal function. In conclusion, these findings reveal an aspect of LD function and uncover a role for lipid metabolism in stomatal development in plants.
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Tsuyoshi Nakagawa, Takayuki Kurose, Takeshi Hino et al. · Journal of Bioscience and Bioengineering · 2007 · 1.7K citations · Full text
Agriculture, Biotechnology, Genetics +17
Plants transfer lipids to sustain colonization by mutualistic mycorrhizal and parasitic fungi
Yina Jiang, Wanxiao Wang, Qiujin Xie et al. · Science · 2017 · 879 citations