Compared with wild-type plants, AtrabD2b/2c mutants produce deformed pollen with swollen and branched pollen tube tips. An AtrabD2b/2c double mutant is also indistinguishable from wild-type plants during vegetative growth however its siliques are shorter than those in wild-type plants. AtrabD2b and AtrabD2c single mutants have no obvious morphological changes compared with wild-type plants across a variety of growth conditions. Here we report that AtRabD2b and AtRabD2c play important roles in pollen development, germination and tube elongation. ![]() ![]() ![]() Many Rab-like proteins exist in plants, but only a subset have been functionally characterized. Rab GTPases are important regulators of endomembrane trafficking, regulating exocytosis, endocytosis and membrane recycling.
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