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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.12
- 수록면
- 966 - 975 (10page)
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Excessive salt disrupts intracellular ion homeostasis and inhibits plant growth, which poses a serious threat to global food security. Plants have adapted various strategies to survive in unfavorable saline soil conditions. Here, we show that humic acid (HA) is a good soil amendment that can be used to help overcome salinity stress because it markedly reduces the adverse effects of salinity on Arabidopsis thaliana seedlings. To identify the molecular mechanisms of HA-induced salt stress tolerance in Arabidopsis, we examined possible roles of a sodium influx transporter HIGH-AFFINITY K+ TRANSPORTER 1 (HKT1). Salt-induced root growth inhibition in HKT1 overexpressor transgenic plants (HKT1-OX) was rescued by application of HA, but not in wild-type and other plants. Moreover, salt-induced degradation of HKT1 protein was blocked by HA treatment. In addition, the application of HA to HKT1-OX seedlings led to increased distribution of Na+ in roots up to the elongation zone and caused the reabsorption of Na+ by xylem and parenchyma cells. Both the influx of the secondary messenger calcium and its cytosolic release appear to func-tion in the destabilization of HKT1 protein under salt stress. Taken together, these results suggest that HA could be applied to the field to enhance plant growth and salt stress tolerance via post-transcriptional control of the HKT1 transporter gene under saline conditions.
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참고문헌 (86)
참고문헌 신청
Ali, Z. / 2012 / TsHKT1;2, a HKT1 homolog from the extremophile Arabidopsis relative Thellungiella salsuginea, shows K+ specificity in the presence of NaCl / Plant Physiol 158:1463~1474
Apse, M. P. / 1999 / Salt tolerance conferred by overexpression of a vacuolar Na+/H+antiport in Arabidopsis / Science 285:1256~1258
Arancon, N. Q. C. / 2006 / Effects of humic acids from vermin composts on plant growth / Euro. J. Soil Biol 42:65~69
Ashraf, M. / 2007 / Improving plant abiotic-stress resistance by exogenous application of osmoprotectants glycine, betaine and proline / Environ. Exp. Bot 59:206~216
Asik, B. B. / 2009 / Effects of humic substances on plant growth and mineral nutrients uptake of wheat (Triticum durum cv. Salihli) under conditions of salinity / Asian J. Crop Sci 1:87~95
Apse, M. P. / 1999 / Salt tolerance conferred by overexpression of a vacuolar Na+/H+antiport in Arabidopsis / Science 285:1256~1258
Arancon, N. Q. C. / 2006 / Effects of humic acids from vermin composts on plant growth / Euro. J. Soil Biol 42:65~69
Ashraf, M. / 2007 / Improving plant abiotic-stress resistance by exogenous application of osmoprotectants glycine, betaine and proline / Environ. Exp. Bot 59:206~216
Asik, B. B. / 2009 / Effects of humic substances on plant growth and mineral nutrients uptake of wheat (Triticum durum cv. Salihli) under conditions of salinity / Asian J. Crop Sci 1:87~95
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