| Autor: |
Shigeto Morita, Natsumi Tamba, Mineo Shibasaka, Shizuka Sasano, Taiju Kadoike, Yasuyo Urase, Masamitsu Maruyama, Aguri Fukuoka, Junta Yanai, Takehiro Masumura, Yasunari Ogihara, Shigeru Satoh, Kunisuke Tanaka, Maki Katsuhara, Hideki Nakayama |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Bioscience, Biotechnology, and Biochemistry. 87:482-490 |
| ISSN: |
1347-6947 |
| DOI: |
10.1093/bbb/zbad020 |
| Popis: |
HAK family transporters primarily function as K+ transporters and play major roles in K+ uptake and translocation in plants, whereas several HAK transporters exhibit Na+ transport activity. OsHAK2, a rice HAK transporter, was shown to mediate Na+ transport in Escherichia coli in a previous study. In this study, we investigated whether OsHAK2 is involved in Na+ transport in the rice plant. Overexpression of OsHAK2 increased Na+ translocation from the roots to the shoots of transgenic rice. It also increased both root and whole-plant Na+ content, and enhanced shoot length under low Na+ and K+ conditions. Meanwhile, OsHAK2 overexpression increased salt sensitivity under a long-term salt stress condition, indicating that OsHAK2 is not involved in salt tolerance, unlike in the case of ZmHAK4 in maize. These results suggest that OsHAK2 is permeable to Na+ and contributes to shoot growth in rice plants under low Na+ and K+ conditions. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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