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Kaya H, Nakajima R, Iwano M, Kanaoka MM, Kimura S, Takeda S, Kawarazaki T, Senzaki E, Hamamura Y, Higashiyama T, Takayama S, Abe M, Kuchitsu K. Ca2+-activated reactive oxygen species production by Arabidopsis RbohH and RbohJ is essential for proper pollen tube tip growth. Plant Cell 2014; 26:1069-80. [PMID: 24610725 PMCID: PMC4001369 DOI: 10.1105/tpc.113.120642] [Citation(s) in RCA: 180] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 02/03/2014] [Accepted: 02/17/2014] [Indexed: 05/17/2023]
Abstract
In flowering plants, pollen germinates on the stigma and pollen tubes grow through the style to fertilize the ovules. Enzymatic production of reactive oxygen species (ROS) has been suggested to be involved in pollen tube tip growth. Here, we characterized the function and regulation of the NADPH oxidases RbohH and RbohJ (Respiratory burst oxidase homolog H and J) in pollen tubes in Arabidopsis thaliana. In the rbohH and rbohJ single mutants, pollen tube tip growth was comparable to that of the wild type; however, tip growth was severely impaired in the double mutant. In vivo imaging showed that ROS accumulation in the pollen tube was impaired in the double mutant. Both RbohH and RbohJ, which contain Ca(2+) binding EF-hand motifs, possessed Ca(2+)-induced ROS-producing activity and localized at the plasma membrane of the pollen tube tip. Point mutations in the EF-hand motifs impaired Ca(2+)-induced ROS production and complementation of the double mutant phenotype. We also showed that a protein phosphatase inhibitor enhanced the Ca(2+)-induced ROS-producing activity of RbohH and RbohJ, suggesting their synergistic activation by protein phosphorylation and Ca(2+). Our results suggest that ROS production by RbohH and RbohJ is essential for proper pollen tube tip growth, and furthermore, that Ca(2+)-induced ROS positive feedback regulation is conserved in the polarized cell growth to shape the long tubular cell.
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Affiliation(s)
- Hidetaka Kaya
- Department of Applied Biological Science, Tokyo
University of Science, Noda, Chiba 278-8510, Japan
- Department of Biological Science, Graduate School of
Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ryo Nakajima
- Department of Applied Biological Science, Tokyo
University of Science, Noda, Chiba 278-8510, Japan
| | - Megumi Iwano
- Graduate School of Biological Sciences, Nara Institute of
Science and Technology, Ikoma, Nara 630-0101, Japan
| | - Masahiro M. Kanaoka
- Division of Biological Science, Graduate School of
Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
- Institute of Transformative Bio-Molecules, Nagoya
University, Nagoya, Aichi 464-8602, Japan
| | - Sachie Kimura
- Department of Applied Biological Science, Tokyo
University of Science, Noda, Chiba 278-8510, Japan
| | - Seiji Takeda
- Graduate School of Life and Environmental Sciences, Kyoto
Prefectural University, Soraku-gun, Kyoto 619-0244, Japan
| | - Tomoko Kawarazaki
- Department of Applied Biological Science, Tokyo
University of Science, Noda, Chiba 278-8510, Japan
| | - Eriko Senzaki
- Department of Applied Biological Science, Tokyo
University of Science, Noda, Chiba 278-8510, Japan
| | - Yuki Hamamura
- Division of Biological Science, Graduate School of
Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - Tetsuya Higashiyama
- Division of Biological Science, Graduate School of
Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
- Institute of Transformative Bio-Molecules, Nagoya
University, Nagoya, Aichi 464-8602, Japan
- JST, ERATO, Higashiyama Live-Holonics Project, Nagoya
University, Nagoya, Aichi 464-8602, Japan
| | - Seiji Takayama
- Graduate School of Biological Sciences, Nara Institute of
Science and Technology, Ikoma, Nara 630-0101, Japan
| | - Mitsutomo Abe
- Department of Biological Science, Graduate School of
Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kazuyuki Kuchitsu
- Department of Applied Biological Science, Tokyo
University of Science, Noda, Chiba 278-8510, Japan
- Address correspondence to
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Ogasawara Y, Kaya H, Hiraoka G, Yumoto F, Kimura S, Kadota Y, Hishinuma H, Senzaki E, Yamagoe S, Nagata K, Nara M, Suzuki K, Tanokura M, Kuchitsu K. Synergistic Activation of the Arabidopsis NADPH Oxidase AtrbohD by Ca2+ and Phosphorylation. J Biol Chem 2008; 283:8885-92. [DOI: 10.1074/jbc.m708106200] [Citation(s) in RCA: 360] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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