Plant Molecular Physiology
Research Groups
Group of Plant Molecular PhysiologyStaff
Research Topics
We study the molecular functions of plant cells and biomembranes in response to drought and salt stress environments, especially water channels (aquaporins) and cation channels. Aquaporins in seed maturation is also investigated. In addition to water transport, we are studying another aquaporin function transporting low molecular-weight compounds including CO2 and Na+. Electrophysiological measurements are also conducted to analyze sodium and potassium transporters in a salt stress condition. We cloned the aluminum-tolerant wheat gene ALMT1, which is a highly promising gene to confer acid-soil tolerance on crops. The ALMT1 gene belongs to the ALMT gene family, which has been found only in the plant kingdom. We expect to elucidate unique plant functions coded by individual ALMT genes.
Physiological and molecular analysis of plant membrane transporters
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We study the molecular functions of plant cells and biomembranes in response to drought and salt stress environments, especially water channels (aquaporins) and cation channels. In addition to water transport, we are investigating another aquaporin function transporting low molecular-weight compounds including CO2. Electrophysiological measurements are also conducted to analyze sodium and potassium transporters in a salt stress condition. We cloned the aluminum-tolerant wheat gene ALMT1, which is a highly promising gene to confer acid-soil tolerance on crops. The ALMT1 gene belongs to the ALMT gene family, which has been found only in the plant kingdom. We expect to elucidate unique plant functions coded by individual ALMT genes.
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Publication List
- (1) Imran S, Oyama M, Horie R, Kobayashi NI, Costa A, Kumano R, Hirata C, Tran STH, Katsuhara M, Tanoi K, Kohchi K, Ishizaki K, Horie T. Distinct Functions of the Atypical Terminal Hydrophilic Domain of the HKT Transporter in the Liverwort Marchantia polymorpha. Plant Cell Physiol. on-line first(2022.5)
- (2) Tsuchiya Y, Nakamura T, Izumi Y, Okazaki K, Shinano T, Kubo Y, Katsuhara M, Sasaki T, Yamamoto Y. Physiological Role of Aerobic Fermentation Constitutively Expressed in an Aluminum-Tolerant Cell Line of Tobacco (Nicotiana tabacum), Plant and Cell Physiol. 62:1460–1477 (2021.9)
- (3) Shibasaka M, Horie T, Katsuhara M. Mechanisms activating latent functions of PIP aquaporin water channels via the interaction between PIP1 and PIP2 proteins. Plant Cell Physiol. 62:92-99 (2021.1)
- (4) Tran STH, Horie T, Imran S, Qiu J, McGaughey S, Byrt CS, Tyerman SD, Katsuhara M. A Survey of Barley PIP Aquaporin Ionic Conductance Reveals Ca2+-Sensitive HvPIP2;8 Na+ and K+ Conductance. Int. J. Mol. Sci. 21:7135 (2020.9月)
- (5) Utsugi S., Ashikawa I, Nakamura S, Shibasaka M. TaABI5, a wheat homolog of Arabidopsis thaliana ABA insensitive 5, controls seed germination. J. Plant Res. 133:245–256 (2020.2.)
- (6) Imran S, Horie T, Katsuhara M. Expression and Ion Transport Activity of Rice OsHKT1;1 Variants. Plants 9:16 (2020,1)
- (7) Mori IC, Nobukiyo Y, Nakahara Y, Shibasaka M, Furuichi T, Katsuhara M. A cyclic nucleotide-gated channel, HvCNGC2-3, is activated by the co-presence of Na+ and K+ and permeable to Na+ and K+ non-selectively. Plants 7:61 (2018.7)