Inositol polyphosphate 5-phosphatase-controlled Ins(1,4,5)P3/Ca2+ is crucial for maintaining pollen dormancy and regulating early germination of pollen

Development
Yuan WangHong-Wei Xue

Abstract

Appropriate pollen germination is crucial for plant reproduction. Previous studies have revealed the importance of dehydration in maintaining pollen dormancy; here, we show that phosphatidylinositol pathway-controlled Ins(1,4,5)P(3)/Ca(2+) levels are crucial for maintaining pollen dormancy in Arabidopsis thaliana. An interesting phenotype, precocious pollen germination within anthers, results from a disruption of inositol polyphosphate 5-phosphatase 12 (5PT12). The knockout mutant 5pt12 has normal early pollen development and pollen dehydration, and exhibits hypersensitive ABA responses, indicating that precocious pollen germination is not caused either by abnormal dehydration or by suppressed ABA signaling. Deficiency of 5PT13 (a close paralog of 5PT12) synergistically enhances precocious pollen germination. Both basal Ins(1,4,5)P(3) levels and endogenous Ca(2+) levels are elevated in pollen from 5pt12 mutants, and 5pt12 5pt13 double mutants show an even higher precocious germination rate along with much higher levels of Ins(1,4,5)P(3)/Ca(2+). Strikingly, exogenous Ca(2+) stimulates the germination of wild-type pollen at floral stage 12, even in very low humidity, both in vitro and in vivo, and treatment with BAPTA, a [Ca(2+)]...Continue Reading

References

Apr 24, 1999·The Plant Cell·V E Franklin-Tong
Jun 6, 2000·Trends in Plant Science·J M StevensonW F Boss
Jul 1, 1997·The Plant Cell·J. D. Bewley
Aug 13, 2003·Proceedings of the National Academy of Sciences of the United States of America·Fouad Lemtiri-ChliehCharles A Brearley
Oct 11, 2003·The Plant Journal : for Cell and Molecular Biology·Wei LiuHong-Wei Xue
Jun 1, 1997·Annual Review of Plant Physiology and Plant Molecular Biology·Loverine P. Taylor, Peter K. Hepler
Mar 24, 2004·The Plant Cell·Sheila McCormick
Oct 19, 2004·Plant Physiology·Megumi IwanoAkira Isogai
Aug 19, 2006·IUBMB Life·Megan V AstleChristina A Mitchell
Jan 24, 2007·Plant Physiology·Bhadra GunesekeraGlenda E Gillaspy
Aug 4, 2007·Science·Juan-Miguel Escobar-RestrepoUeli Grossniklaus
Aug 22, 2007·Current Opinion in Plant Biology·Hongwei XueGang Li
Jan 23, 2008·The Plant Journal : for Cell and Molecular Biology·Jun FangChengcai Chu
Feb 9, 2008·Annual Review of Plant Biology·Ruth FinkelsteinCamille Steber
Jun 26, 2009·The Biochemical Journal·Hong-Wei XueYu Mei
Nov 1, 1980·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·M Koornneef, J H van der Veen

❮ Previous
Next ❯

Citations

Mar 13, 2014·Plant Cell Reports·Kang Chong, Zhihong Xu
May 23, 2014·The Plant Journal : for Cell and Molecular Biology·Yozo Okazaki, Kazuki Saito
Jun 22, 2017·International Journal of Molecular Sciences·Xiao YangShuzhen Men
Jun 16, 2016·Development·Ingo Heilmann
Aug 21, 2019·International Journal of Molecular Sciences·Qi JiaJinwen Huang
Nov 21, 2020·The Plant Journal : for Cell and Molecular Biology·Peng-Min ZhouDe Ye
Apr 29, 2021·Plant Signaling & Behavior·Cai Yu YuXin-Qi Gao

❮ Previous
Next ❯

Related Concepts

Related Feeds

Calcium & Bioenergetics

Bioenergetic processes, including cellular respiration and photosynthesis, concern the transformation of energy by cells. Here is the latest research on the role of calcium in bioenergetics.