- Information
- Symbol: OsAKT2
- MSU: LOC_Os05g35410
- RAPdb: Os05g0428700
- Publication
- Rice shaker potassium channel OsKAT1 confers tolerance to salinity stress on yeast and rice cells, 2007, Plant Physiol.
- Phosphatidic acid directly binds with rice potassium channel OsAKT2 to inhibit its activity., 2020, Plant J.
- Multiple basic amino acid residues contribute to phosphatidic acid-mediated inhibition of rice potassium channel OsAKT2, 2020, Plant Signal Behav ..
- Rice shaker potassium channel OsAKT2 positively regulates salt tolerance and grain yield by mediating K + redistribution, 2021, Plant Cell Environ.
- The rectification control and physiological relevance of potassium channel OsAKT2., 2021, Plant Physiol.
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Genbank accession number
- Key message
- Disruption of OsAKT2 results in delayed growth of rice seedlings under short-day conditions
- Here, we identified the rice OsAKT2 as the ortholog of Arabidopsis AtAKT2, which is primarily expressed in the shoot phloem and localized at the plasma membrane
- Phosphatidic acid directly binds with rice potassium channel OsAKT2 to inhibit its activity.
- Multiple basic amino acid residues contribute to phosphatidic acid-mediated inhibition of rice potassium channel OsAKT2
- Here, using a PA biosensor (PAleon), we found that the exogenous PA treatment significantly increased the PA level at the plasma membrane of Xenopus oocytes which were used to express OsAKT2 for electrophysiological assays
- Rice shaker potassium channel OsAKT2 positively regulates salt tolerance and grain yield by mediating K + redistribution
- In addition, OsAKT2 also regulates the translocation of K+ and sucrose from old leaves to young leaves, and affects grain shape and yield
- Here, we provide physiological and genetic evidence of the involvement of phloem-localized OsAKT2 in rice salt tolerance
- Under salt stress, a T-DNA knock-out mutant, osakt2 and two CRISPR lines showed a more sensitive phenotype and higher Na+ accumulation than wild type
- Disruption of OsAKT2 decreases K+ concentration in phloem sap and inhibits shoot-to-root redistribution of K+
- Additionally, overexpression of OsAKT2 ameliorated the salt tolerance of Arabidopsis
- Overexpression of OsAKT2 complemented the K+ deficiency in the phloem sap and leaves of the mutant plants but did not significantly contribute to the transport of sugars
- However, the expression of OsAKT2-K191R overcame both the shortage of phloem K+ and sucrose of the akt2 mutant, which was comparable to the effects of the overexpression of AtAKT2, while the expression of the inward mutation AtAKT2-R195K resembled the effects of OsAKT2
- Connection
- OsAKT2, OsCBL1, The rectification control and physiological relevance of potassium channel OsAKT2, OsAKT2 was modulated by OsCBL1/OsCIPK23, evoking the outward activity and diminishing the inward current.
- OsAKT2, OsCIPK23, The rectification control and physiological relevance of potassium channel OsAKT2, OsAKT2 was modulated by OsCBL1/OsCIPK23, evoking the outward activity and diminishing the inward current.
- OsAKT2, OsHKT1;5~SKC1~OsHKT8~OsHK1;5, Natural variations of chlorophyll fluorescence and ion transporter genes influenced the differential response of japonica rice germplasm with different salt tolerances., The expression characteristics of chlorophyll fluorescence genes (OsABCI7 and OsHCF222) and ion transporter protein genes (OsHKT1;5, OsHKT2;1, OsHAK21, OsAKT2, OsNHX1, and OsSOS1) were analyzed
- OsAKT2, OsHKT2;1~OsHKT1, Natural variations of chlorophyll fluorescence and ion transporter genes influenced the differential response of japonica rice germplasm with different salt tolerances., The expression characteristics of chlorophyll fluorescence genes (OsABCI7 and OsHCF222) and ion transporter protein genes (OsHKT1;5, OsHKT2;1, OsHAK21, OsAKT2, OsNHX1, and OsSOS1) were analyzed
- OsAKT2, OsHAK21~qSE3, Natural variations of chlorophyll fluorescence and ion transporter genes influenced the differential response of japonica rice germplasm with different salt tolerances., The expression characteristics of chlorophyll fluorescence genes (OsABCI7 and OsHCF222) and ion transporter protein genes (OsHKT1;5, OsHKT2;1, OsHAK21, OsAKT2, OsNHX1, and OsSOS1) were analyzed
- OsAKT2, OsHAK21~qSE3, Natural variations of chlorophyll fluorescence and ion transporter genes influenced the differential response of japonica rice germplasm with different salt tolerances., Haplotype analysis revealed four key variations associated with salt tolerance, including an SNP (+1605 bp) within OsABCI7 exon, an SSR (-1231 bp) within OsHAK21 promoter, an indel site at OsNHX1 promoter (-822 bp), and an SNP (-1866 bp) within OsAKT2 promoter
- OsAKT2, OsHCF222, Natural variations of chlorophyll fluorescence and ion transporter genes influenced the differential response of japonica rice germplasm with different salt tolerances., The expression characteristics of chlorophyll fluorescence genes (OsABCI7 and OsHCF222) and ion transporter protein genes (OsHKT1;5, OsHKT2;1, OsHAK21, OsAKT2, OsNHX1, and OsSOS1) were analyzed
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