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以鲜食番茄品种‘欧亚多’种子和幼苗为试材,对种子进行不同浓度(0.05、0.10、0.50、1.00、1.50mmol/L)SNP(NO供体硝普钠)浸泡后进行低温(18±1)℃处理;对幼苗施用不同浓度(0.1、0.5、1.0、1.5mmol/L)的SNP并进行低温(12±1)℃/(8±1)℃处理,以研究外源NO对低温胁迫下番茄种子萌发和幼苗生长的影响。结果表明:0.05、0.10mmol/L的SNP处理提高了低温胁迫下番茄种子的发芽率、发芽势、发芽指数和活力指数,其中0.05mmol/L的SNP处理效果最好;施用不同浓度SNP(0.10~1.00mmol/L)可不同程度地缓解低温对番茄幼苗的株高、茎粗、叶片数、鲜重、干重及根系活力的抑制,其中0.50mmol/L的SNP处理对根系活力影响效果最好,其余指标为1.00mmol/L的SNP处理效果最好。
The seed and seedlings of ’Eurasia’, a fresh tomato variety, were used as test materials and soaked in SNP (NO donor sodium nitroprusside) at different concentrations (0.05,0.10,0.50,1.00,1.50mmol / L) 18 ± 1) ℃. The seedlings were treated with different concentrations (0.1,0.5,1.0,1.5 mmol / L) of SNP and treated with low temperature (12 ± 1) ℃ / (8 ± 1) Effects of Low Temperature Stress on Seed Germination and Seedling Growth of Tomato Seedlings. The results showed that 0.05,0.10mmol / L SNP increased the germination rate, germination energy, germination index and vigor index of tomato seeds under low temperature stress, of which 0.05mmol / L SNP treatment effect best; the application of different concentrations of SNP (0.10 ~ 1.00mmol / L) could alleviate the inhibition of plant height, stem diameter, leaf number, fresh weight, dry weight and root vigor of tomato seedlings to different degrees. The best effect of 0.50mmol / L SNP on root activity Well, the other indicators of 1.00mmol / L of SNP treatment best.