Arabidopsis Qc-SNARE genes BET11 and BET12 are required for fertility and pollen tube elongation

Botanical Studies
Pablo Bolaños-VillegasGuang-Yuh Jauh

Abstract

BET11 and 12 are required for pollen tube elongation. Pollen tubes are rapidly growing specialized structures that elongate in a polar manner. They play a crucial role in the delivery of sperm cells through the stylar tissues of the flower and into the embryo sac, where the sperm cells are released to fuse with the egg cell and the central cell to give rise to the embryo and the endosperm. Polar growth at the pollen tube tip is believed to result from secretion of materials by membrane trafficking mechanisms. In this study, we report the functional characterization of Arabidopsis BET11 and BET12, two genes that may code for Qc-SNAREs (soluble N-ethylmaleimide-sensitive factor attachment protein receptors). Double mutants (bet11/bet12) in a homozygous/heterozygous background showed reduced transmission of the mutant alleles, reduced fertilization of seeds, defective embryo development, reduced pollen tube lengths and formation of secondary pollen tubes. Both BET11 and BET12 are required for fertility and development of pollen tubes in Arabidopsis. More experiments are required to dissect the mechanisms involved.

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Methods Mentioned

BETA
nucleotide exchange
PCR
confocal microscopy
dissection
genotyping
GTPases
transmission electron microscopy

Software Mentioned

SWISS
MODEL
Zeiss LSM Image Browser
Coffee

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