期刊
SCIENCE
卷 332, 期 6028, 页码 434-437出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1201101
关键词
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资金
- Fundacao para a Ciencia e a Tecnologia [SFRH/BPD 21056/2004]
- European Molecular Biology Organization [ASTF 193-2007]
- Agropolis fellowships
- Centro de Biologia do Desenvolvimento [FCT U664]
- FCT [BIA-BCM/108044/2008, QUI/64339/2006]
- Austrian Science Fund [P21298]
- China National Science Foundation [30771288]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/21056/2004] Funding Source: FCT
- Austrian Science Fund (FWF) [P21298] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [P 21298] Funding Source: researchfish
Elevations in cytosolic free calcium concentration ([Ca2+](cyt)) constitute a fundamental signal transduction mechanism in eukaryotic cells, but the molecular identity of Ca2+ channels initiating this signal in plants is still under debate. Here, we show by pharmacology and loss-of-function mutants that in tobacco and Arabidopsis, glutamate receptor-like channels (GLRs) facilitate Ca2+ influx across the plasma membrane, modulate apical [Ca2+] cyt gradient, and consequently affect pollen tube growth and morphogenesis. Additionally, wild-type pollen tubes grown in pistils of knock-out mutants for serine-racemase (SR1) displayed growth defects consistent with a decrease in GLR activity. Our findings reveal a novel plant signaling mechanism between male gametophyte and pistil tissue similar to amino acid-mediated communication commonly observed in animal nervous systems.
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