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The Os-AKT1 Channel Is Critical for K⁺ Uptake in Rice Roots and Is Modulated by the Rice CBL1-CIPK23 Complex

Li, Juan ; Long, Yu ; Qi, Guo-Ning ; Xu, Zi-Jian ; Wu, Wei-Hua ; Wang, Yi

The Plant cell, 2014-08, Vol.26 (8), p.3387-3402 [Periódico revisado por pares]

England: American Society of Plant Biologists

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Título:
The Os-AKT1 Channel Is Critical for K⁺ Uptake in Rice Roots and Is Modulated by the Rice CBL1-CIPK23 Complex
Autor: Li, Juan ; Long, Yu ; Qi, Guo-Ning ; Xu, Zi-Jian ; Wu, Wei-Hua ; Wang, Yi
Assuntos: Arabidopsis ; Arabidopsis Proteins - chemistry ; Arabidopsis Proteins - genetics ; Arabidopsis Proteins - physiology ; Arabidopsis thaliana ; Calcium-Binding Proteins - genetics ; Calcium-Binding Proteins - metabolism ; Calcium-Binding Proteins - physiology ; Electric current ; Genetic Complementation Test ; HEK293 cells ; Nicotiana - genetics ; Oryza - metabolism ; Oryza sativa ; Phenotypes ; Plant cells ; Plant Proteins - genetics ; Plant Proteins - metabolism ; Plant Proteins - physiology ; Plant roots ; Plant Roots - metabolism ; Plants ; Potassium - metabolism ; Potassium Channels - chemistry ; Potassium Channels - genetics ; Potassium Channels - physiology ; Protein Serine-Threonine Kinases - antagonists & inhibitors ; Protein Serine-Threonine Kinases - genetics ; Protein Serine-Threonine Kinases - physiology ; Protoplasts ; Rice ; RNA Interference ; Seedlings ; Yeasts ; Yeasts - genetics
É parte de: The Plant cell, 2014-08, Vol.26 (8), p.3387-3402
Notas: ObjectType-Article-1
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These authors contributed equally to this work.
The author responsible for distribution of materials integral to the findings presented in this article in accordance with the policy described in the Instructions for Authors (www.plantcell.org) is: Yi Wang (yiwang@cau.edu.cn).
Current address: Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Feng Lin Road, Shanghai 200032, China.
www.plantcell.org/cgi/doi/10.1105/tpc.114.123455
Descrição: Potassium (K⁺) is one of the essential nutrient elements for plant growth and development. Plants absorb K⁺ ions from the environment via root cell K⁺ channels and/or transporters. In this study, the Shaker K⁺ channel Os-AKT1 was characterized for its function in K⁺ uptake in rice (Oryza sativa) roots, and its regulation by Os-CBL1 (Calcineurin B-Like protein 1) and Os-CIPK23 (CBL-lnteracting Protein Kinase23) was investigated. As an inward K⁺ channel, Os-AKT1 could carry out K⁺ uptake and rescue the low-K⁺-sensitive phenotype of Arabidopsis thaliana akt1 mutant plants. Rice Os-akt1 mutant plants showed decreased K⁺ uptake and displayed an obvious low-K⁺-sensitive phenotype. Disruption of Os-AKT1 significantly reduced the K⁺ content, which resulted in inhibition of plant growth and development. Similar to the AKT1 regulation in Arabidopsis, Os-CBL1 and Os-CIPK23 were identified as the upstream regulators of Os-AKT1 in rice. The Os-CBL1-Os-CIPK23 complex could enhance Os-AKT1-mediated K⁺ uptake. A phenotype test confirmed that Os-CIPK23 RNAi lines exhibited similar K⁺-deficient symptoms as the Os-akt1 mutant under low K + conditions. These findings demonstrate that Os-AKT1-mediated K⁺ uptake in rice roots is modulated by the Os-CBL1-Os-CIPK23 complex.
Editor: England: American Society of Plant Biologists
Idioma: Inglês

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The Os-AKT1 Channel Is Critical for K⁺ Uptake in Rice Roots and Is Modulated by the Rice CBL1-CIPK23 Complex

Li, Juan ; Long, Yu ; Qi, Guo-Ning ; Xu, Zi-Jian ; Wu, Wei-Hua ; Wang, Yi

England: American Society of Plant Biologists

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