中文摘要：

采用营养液培法,以加工番茄品种‘里格尔87-5’为材料,通过对NaCl胁迫下加工番茄幼苗叶片分别喷施5、10、15 μmol·L-1NADP-和NADPH,研究外源NADP＋、NADPH对NaCl胁迫下加工番茄幼苗生长及其抗逆生理指标的影响.结果表明：外源喷施NADP＋、NADPH均能改善NaCl处理下加工番茄幼苗的生长性状,增加叶片叶绿素含量,提高根系活力和叶片过氧化物酶（POD）、超氧化物歧化酶（SOD）、过氧化氢酶（CAT）和抗坏血酸过氧化物酶（APX）活性,降低丙二醛（MDA）质量摩尔浓度.通过不同处理综合指标总加权值比较评价得出：NaG1胁迫下喷施5μmol·L-1 NADPH的效果最佳,其次为10 μmol· L-1 NADP＋.可见,外源喷施NADP＋ 、NADPH通过增加色素含量,可提高抗氧化酶活性,降低膜脂过氧化水平,在一定程度上缓解盐胁迫对植株的伤害,从而增强对盐胁迫的适应性.

英文摘要：

The objectives of this hydroponic experiment were to determine the effects of exogenous NADP＋ and NADPH on the growth of processing tomato （Solanum lycopersicum cv.Ligeer 87-5） seedlings under NaCl stress.The tomato leaves were sprayed with either NADP＋ or NADPH at concentrations of 5,10,and 15 μmol · L-1.The results showed that exogenous NADP＋ and NADPH reduced malondialdehyde （MDA） mass molality and increased the growth of tomato seedlings under NaCl stress.Exogenous NADP＋ and NADPH increased the activities of superoxide dismutase （SOD）,peroxidase （POD）,catalase （CAT） and ascorbate peroxidase （APX）.Exogenous NADP＋ and NADPH also increased leaf chlorophyll content and root activities.Comprehensive evaluation of the physiological indexes by subordinate function values analysis indicated that spraying 5 μmol · L 1 NADPH in the NaCl treatment had the best treatment effect,followed by 10 μmol · L ~ NADP＋.These results indicated that exogenous NADP＋ and NADPH can alleviate the damage of NaCl stress on tomato seedlings by reducing membrane lipid peroxidation and increasing leaf chlorophyll mass fraction and antioxidant enzyme activities.