印度梨形孢提高香蕉抗热性的生理生化机制（英文）

发布时间：2023-04-30 05:39

　　为研究印度梨形孢(Piriformospora Indica)对香蕉抗热性的影响及其生理生化机制,测定和比较了45℃高温处理0 h、3 h、6 h、12 h和24 h的有/无定殖的"天宝蕉"叶片中抗氧化活性物质活性或含量及激素含量变化情况.结果显示:高温处理后有/无P. indica定殖的香蕉叶片中H₂O₂含量呈先升后降的变化趋势,脯氨酸(Pro)和丙二醛(MDA)含量呈下降趋势,同时,P. indica定殖的香蕉叶片中H₂O₂、Pro和MDA含量均高于无定殖对照.高温处理下香蕉叶片超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)和苯丙氨酸酶(PAL)活性均逐步升高,且P. indica定殖的香蕉叶片中这些指标均低于无定殖组. P. indica定殖的香蕉多酚氧化酶(PPO)活性在高温处理各时间点变化不显著,而无定殖组PPO活性在高温处理3 h时显著升高.高温处理前后P. indica定殖香蕉叶片中吲哚乙酸(IAA)和赤霉素(GA)含量均低于无定殖组,脱落酸(ABA)含量显著高于...

【文章页数】：7 页

【文章目录】：
1 Materials and Methods
    1.1 Materials
    1.2 Methods
        1.2.1 Cultivation of P.indica
        1.2.2 Plant material treatments
        1.2.3 Determination of enzymatic and non-enzymatic antioxidant activities and phytohormone concentrations
        1.2.4 Statistical analysis
2 Results and analysis
    2.1 Growth of“Tianbaojiao”banana seedlings treated with P.indica
    2.2 Effect of P.indica on H2O2 content in banana leaves before and after HT treatment
    2.3 Effect of P.indica on MDA content in banana leaves before and after HT treatment
    2.4 Effect of P.indica on Pro content in banana leaves before and after HT treatment
    2.5 Effects of P.indica on enzyme activities in banana leaves before and after HT treatment
    2.6 Phytohormone contents in banana leaves treated with P.indica and HT
3 Discussion and conclusion



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