外源物质处理对番茄抗冷性的影响

以番茄为材料,利用不同浓度的外源生长调节物质处理番茄幼苗期幼苗,测定各项生理生化指标数值.结果表明,经过脱落酸、水杨酸、多效唑、茉莉酸外源诱导的番茄幼苗抗冷性明显高于对照.随着诱导浓度的增大,抗寒性逐渐增强,相对电导率逐渐降低,当脱落酸浓度为200μg/g和水杨酸浓度为400 mg/L时,相对电导率降低近一倍;脯氨酸和可溶蛋白都随着处理浓度的增大显著提高,过氧化物酶的活性随处理浓度的增大而逐渐减少.在不同浓度的处理下,ABA浓度增长量同比增长最大为浓度100 μg/g和150μg/g;水杨酸浓度增长量同比增长最大为浓度300 mg/L;多效唑浓度增长量同比增长最大为60 mg/L;茉莉酸浓度增长量同比增长最大为200 mg/L.外源生长调节物质处理使植株的抗冷性提高,但在品种上有差异,对抗冷性强的品种效果明显.

The Effects Of Allogenic Material On Cold -Resistance Of Tomato Seedlings

The tomatoes were selected as the experimental material, effect of treat with different concentrations of exogenous growth regulators on physiological reaction during the seedling. It was showed that the cold resistance was increased through the abscisic acid, salicylic acid, paclobutrazol, jasmonic acid, and the cold resistance was increased in higher concentrations. Conductivity in the seedlings was reducing significantly in 200ug/g ABA and 400mg/L salicylic acid. With growth of induced concentrations, proline and soluble proteoglycan were higher than in the control, but peroxydase was decreased. Following the 100 ug/g or 150 ug/g ABA, 300 mg/L salicylic acid, 60 mg/L paclobutrazol and 200 mg/L jasmonic acid treatment, the proline and soluble proteoglycan in seedlings increased to maximum, comparing to that in the control respectively. In addition, there are different effects of exogenous growth regulators on varieties but enhance cold-resistance were appearance.