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- Title
Arabidopsis AtBECLIN 1/AtAtg6/AtVps30 is essential for pollen germination and plant development.
- Authors
Genji Qin; Zhiqiang Ma; Li Zhang; Shufan Xing; Xianhui Hou; Jie Deng; Jingjing Liu; Zhangliang Chen; Li-Jia Qu; Hongya Gu
- Abstract
Pollen germination on the surface of compatible stigmatic tissues is an essential step for plant fertilization. Here we report that the Arabidopsis mutant bcl1 is male sterile as a result of the failure of pollen germination. We show that the bcl1 mutant allele cannot be transmitted by male gametophytes and no homozygous bcl1 mutants were obtained. Analysis of pollen developmental stages indicates that the bcl1 mutation affects pollen germination but not pollen maturation. Molecular analysis demonstrates that the failure of pollen germination was caused by the disruption of AtBECLIN 1. AtBECLIN 1 is expressed predominantly in mature pollen and encodes a protein with significant homology to Beclin1/Atg6/Vps30 required for the processes of autophagy and vacuolar protein sorting (VPS) in yeast. We also show that AtBECLIN 1 is required for normal plant development, and that genes related to autophagy, VPS and the glycosylphosphatidylinositol anchor system, were affected by the deficiency of AtBECLIN 1.Cell Research (2007) 17: 249–263. doi: 10.1038/cr.2007.7; published online 6 March 2007
- Subjects
ARABIDOPSIS; PLANT development; GERMINATION; POLLINATION; SPERMATOZOA; PLANT fertilization
- Publication
Cell Research, 2007, Vol 17, Issue 3, p249
- ISSN
1001-0602
- Publication type
Article
- DOI
10.1038/cr.2007.7