晚播加工番茄生育关键期生理生化指标研究

Research on the Physiological and Biochemical Indexes of Late Sown Processing Tomato

基于新疆加工番茄生长发育规律,设计不同播期处理,第1播期(正常播期)(4月15日)、第2播期(5月15日)、第3播期(6月15日)。在加工番茄不同发育期对各处理进行过氧化氢酶(CAT)活性、超氧化物歧化酶(SOD)活性和过氧化物底物酶(POD)活性等生理生化指标进行测定,以揭示晚播加工番茄生长发育过程中高温胁迫对植株生理生化的影响。结果表明:晚播处理加工番茄叶片SOD活性呈先降低后上升再降低的趋势,清除氧离子速率显著降低;叶片POD活性呈先下降后上升再降低的趋势,与正常期处理对比差异显著;叶片CAT活性呈先下降后上升趋势,与正常播期处理对比也发生较大变化。对各处理产量测定表明,晚播处理的产量显著低于正常播期处理的产量,正常播期处理667m2产量达5.81t,第2播期处理产量为3.51t,第3播期处理产量为1.76t。

Based on growth regularity,designed different sowing time,the first sowing period （normal sowing period） was on 15th April, the second sowing period was on 15th May, the third sowing period was on 15th June. The CAT, superoxide dismutase SOD activity and peroxide substrate POD activity enzyme and physiological and biochemical indexes were measured in different growth period, to reveal the late sown processing tomato growth in the process of high temperature stress on plant physiological and biochemical influence. The results showed that late sown treatment processing tomato leaf SOD activity showed trends of first reduced then rised reappear reduced trend, the activith of ger rid of oxygen iondecreased;late sown treatment processing tomato leaf POD activity showed trends of first reduced then rised reappear reduced trend, had significant difference between normal treatment;late sown processing tomato leaf CAT activity showed trends of first reduced then rised reappear reduced trend,had big difference with normal treatment. Yield test to different treatment showed that,yield of late sown processing significantly lower than normal planting processing. 667 m2 Yield of narmal treatment was 5.81 t,yield of the second sowing was 3.51 t,the third sowing was 1.76 t.