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Pollen tubes have dynamic tubular vacuoles. Functional loss of AP‐3, a regulator of one vacuolar trafficking route, reduces pollen tube growth. However, the role of canonical Rab5 GTPases that are responsible for two other vacuolar trafficking routes in Arabidopsis pollen tubes is obscure.
By using genomic editing, confocal microscopy, pollen tube growth assays, and transmission electron microscopy,...
We investigated a genetic pathway in root hair development in Arabidopsis thaliana, involving the receptor‐like kinase FERONIA (FER), two guanine nucleotide exchange factors for ROPs (RopGEF4 and RopGEF10), and the small GTPase Rho of plants (ROPs).Loss‐ and gain‐of‐function analyses demonstrated distinct roles of RopGEF4 and RopGEF10 such that RopGEF4 is only important for root hair elongation, while...
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