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加工番茄品种里格尔87-5为材料,采用水培法,研究了添加Si对不同浓度NaCl条件下的加工番茄幼苗生长量特征参数、膜脂过氧化程度及其保护酶类活性、光合色素含量、光合特性等指标的影响。结果表明,随着NaCl浓度的升高,里格尔87-5总生物量逐渐减少,干物质积累率上升,NaCl浓度为50mmol/L时,添加Si处理的幼苗干物质积累率极显著高于未添加Si处理(P<0.01)。里格尔87-5幼苗叶片相对电导率和丙二醛(MDA)含量随NaCl浓度的增加而上升,添加Si后,NaCl浓度为50mmol/L时叶片相对电导率和MDA含量分别降低72.33%和19.00%,超氧化物歧化酶(SOD)活性也显著增强(P<0.05),但添加Si处理对叶片过氧化物酶(POD)和过氧化氢酶(CAT)活性的影响均不显著(P>0.05)。在不同浓度NaCl条件下,添加Si处理与不添加Si处理的里格尔87-5叶片叶绿素含量和类胡萝卜素含量间均没有显著差异(P>0.05)。NaCl浓度为50mmol/L时,添加Si处理的净光合速率为10.28μmol/(m~2·s),与未添加Si处理相比高出42.08%。50mmol/LNaCl浓度条件下,添加Si处理能够提高加工番茄里格尔87-5的耐盐能力。
The processing tomato variety Ringer 87-5 was used as material to study the effects of adding Si on the seedling growth characteristics, membrane lipid peroxidation and the activities of protective enzymes under different NaCl concentrations. The photosynthetic pigments Content, photosynthetic characteristics and other indicators. The results showed that with the increase of NaCl concentration, the total biomass of Ringer 87-5 decreased and the dry matter accumulation rate increased. When NaCl concentration was 50 mmol / L, the accumulation rate of dry matter of young seedlings treated with Si was significantly higher than that of No Si treatment was added (P <0.01). Relative electric conductivity and MDA content in seedlings of Ringer 87-5 increased with the increase of NaCl concentration. After addition of Si, the relative electric conductivity and MDA content decreased by 72.33% and 50 mmol / L, respectively (P <0.05). However, the activities of superoxide dismutase (SOD) and the activities of superoxide dismutase (SOD) were also significantly increased (P <0.05) > 0.05). Under different concentrations of NaCl, there was no significant difference (P> 0.05) between chlorophyll content and carotenoid content in Liger 87-5 leaves treated with or without Si. When NaCl concentration was 50mmol / L, the net photosynthetic rate of Si treatment was 10.28μmol / (m ~ 2 · s), which was 42.08% higher than that without Si treatment. Under the condition of 50 mmol / L NaCl, the addition of Si can improve the salt tolerance of the processing tomato RIGE 87-5.