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Reference Detail
| Reference | ||
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| Author | Yang C., Zhao N., Xu C., Liu B., Shi D. | |
| Title | Regulation of ion homeostasis in rice subjected to salt and alkali stresses | |
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Abstract: Alkali stress has showna strong effect on K+/Na+homeostasis than salt stressin many plants. In this study, rice seedlings were subjected to salt stress (NaCl:Na2SO4 = 9:1; pH 5.45) or alkali stress (NaHCO3:Na2CO3= 9:1; pH 9.05). The contents of Na+, K+, and inorganic anions and organic acids in the stressed seedlings were then measured. Then, the expression of some genes related to K+/Na+ metabolism suchasOsHKT, OsNHX and OsHAK families, the SOS pathway and OsAKT1 were assayedto investigate ion homeostasis and the regulative functions of these genes in rice alkali-tolerance. The resultsindicated that, alkalistress clearly reduced the contentsof inorganicanions in rice, induced the massive influx of Na+and a deficiency of K+ in roots, and disrupted Na+/K+ homeostasis and chargebalancecompared with salt stress (NaCl:Na2SO4 = 9:1; pH 5.45). Salt stress only hassmall effects on the OsHAK, OsNHXand OsHKTfamilies and the OsAKT1and SOS pathways in rice, but alkali stress strongly stimulated their expression in roots and shoots. These findings suggestedthat the rice OsHKT family, OsNHXfamily and SOS pathway might play important roles in protecting shoots from high-Na+ injury caused by alkali stress, especially in controlling Na+ transport from roots to shoots. Under alkali stress, the overexpression of OsHAKs and OsAKT1 might contribute to the release of K+from roots to shootsorthe K+ uptake by roots and maintain the potassium nutrition supply of shoots. Theresponses of these genesto alkali stress indicated that they might play important roles in rice alkali tolerance. Therefore, we propose that these geneshave the potential for use in alkali tolerance and should be investigated further. |
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| Journal | Aust J Crop Sci | |
| Country | China | |
| Volume | 6 | |
| Pages | 724-731 | |
| Year | 2012 | |
| PubMed ID | - | |
| PubMed Central ID | - | |
| DOI | - | |
| URL | - | |
| Relation | ||
| Gene | AKT1 HAK10 HAK16 HAK7 HKT1 HKT4 HKT6 NHX1 NHX3 SKC1 SOS1 SOS2 SOS3 | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
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Stages in Each Organ - Muant Lines (Gene) |
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| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
