王斌;姜红;韩占红;郑晓渊;李志程;毕阳;

• 1:甘肃农业大学园艺学院
• 2:甘肃农业大学食品科学与工程学院

摘要(Abstract)：

【目的】研究果实发育期硝普钠(Sodium Nitroprusside,SNP)多次喷洒对采后厚皮甜瓜抗病性、后熟和能量代谢的影响。【方法】以‘玛瑙’厚皮甜瓜为试材,在果实幼果期(花后14 d)、膨大前期(花后21 d)、膨大后期(花后28 d)和成熟期(采前2 d)4个时期分别采用0.5 mmol·L-1SNP进行喷洒,以清水喷洒作为对照,观察处理对采后果实损伤接种粉红单端孢发病率及病斑直径的影响,测定果实采收及贮藏期间的呼吸速率和乙烯释放量,分析果实苹果酸脱氢酶和琥珀酸脱氢酶活性以及能荷水平的变化。【结果】SNP喷洒有效抑制了采后损伤接种果实的发病率和病斑直径,贮藏6 d时,分别低于对照47.4%和37.4%。SNP处理降低了果实采收时的乙烯释放量,以及贮藏期间果实的呼吸强度和乙烯释放量,并使果实呼吸和乙烯跃变峰的出现推迟了2 d。此外,SNP处理还显著提高了果实贮藏期间苹果酸脱氢酶和琥珀酸脱氢酶的活性,延缓了ATP的下降速率,提高了ADP的含量,维持了果实较高的能荷水平。【结论】果实发育期SNP多次喷洒可有效提高厚皮甜瓜果实的采后抗病性,该作用与一氧化氮延缓果实后熟,增加能量供应,提高能荷水平密切相关。

关键词(KeyWords)： 厚皮甜瓜;硝普钠;采前喷洒;抗病性;后熟;能量代谢

Abstract:

Keywords:

基金项目(Foundation): 公益性行业（农业）科研专项（201303075）

作者(Author): 王斌;姜红;韩占红;郑晓渊;李志程;毕阳;

Email:

DOI: 10.13925/j.cnki.gsxb.20190124

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