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Osmotic adjustment and up-regulation expression of stress-responsive genes in tomato induced by soil salinity resulted from nitrate fertilization

引用

International Journal of Agricultural and Biological Engineering 2018年第3期11卷 126-136页

作者： Tingting Chang Yujie Zhang Huilian Xu Xiaohou Shao Qicong Xu Fenglan Li Lina Yu Zhanyu Zhang Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China of Ministry of Education Hohai UniversityNanjing 210098China College of Agricultural Science and Engineering Hohai UniversityNanjing210098China International Nature Farming Research Center Matsumoto390-1401 Japan Northeast Agricultural University Harbin 150000China Rizhao Institute of Agricultural Sciences Rizhao276800China

Concerns about the soil salinity caused by excessive fertilization have prompted scientists to clarify the detailed mechanisms and find techniques to alleviate the damage caused by this kind of soil *** of this study were to elucidate the effect of soil salinity caused by nitrate fertilization and the differences in salinity effect between nitrate salts and NaCl salt with analyses at various levels of crop physiology and molecular biology.A microbial inoculation was also tried to verify whether it could alleviate the salinity-induced loss and *** three experiments(Exp I,II and III),nitrate salts(NS)of Ca(NO_(3))_(2) and KNO_(3) were applied to potted tomato plants to simulate the soil salinity caused by fertilization and a microbial inoculant(MI)was *** was measured using *** adjustment was analyzed using the mathematically modeled pressure-volume curve;O_(2)-concentration and activity of SOD and nitrate reductase were *** of nitrate reductase gene and the stress-responsive gene DREB2 was analyzed using the real-time PCR *** Exp I and II,where the applied NS amount was moderate,NS application at low concentration induced increases in O_(2)-and MDA concentrations and plants acclimated to the soil salinity as the treatment prolonged for *** acclimation was contributed by osmotic adjustment,activation of SOD and re-compartmentation of cell water between symplasm and *** adjustments might be ultimately attributed to up-regulation of stress-responsive genes such as DREB2 as well as the nitrate reductase(NR)***,in Exp III,applications of NaCl and NS at high concentration could not show positive effects as NS *** of MI synergistically increased the xerophytophysiological regulation caused by NS and alleviated the salinity damage in addition to its own positive effects on the tomato *** from NaCl,nitrate salts at low application rate increased the total b

关键词： nitrate fertilizer osmotic adjustment salinity stress soil salinization tomato(Solanum lycopersicum) xerophytophysiology microorganism bioremediation

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