低温胁迫下PQQ对黄瓜幼苗子叶防御系统的影响

低温胁迫下PQQ对黄瓜幼苗子叶防御系统的影响 EFFECTS OF PQQ ON PROTECTIVE SYSTEM IN COCOMBER COTYLEDONS UNDER LOW TEMPERATURE STRESS 刘卫群 Liu Weiqun 1 2 3 first-author 朱云集 Zhu Yunji 1 2 3 王永华 Wang Yonghua 1 2 3 赵永芳 1 2 3 河南农业大学农学系 河南农业大学农学系 Deptment of Agricutural, Henan Agricutural University,Zhengzhou 450002, China) Zhao Yongfang Deptment of Agricutural, Henan Agricutural University,Zhengzhou 450002, China) Zhao Yongfang 武汉大学生命科学学院 武汉大学生命科学学院 河南农业大学农学系武汉大学生命科学学院 河南农业大学农学系武汉大学生命科学学院 报道了低温胁迫下吡咯喹啉醌（ＰｙｒｒｏｌｏｑｕｉｎｏｌｉｎｅＱｕｉｎｏｎｅ，ＰＱＱ）对黄瓜幼苗子叶超氧化物岐化酶（ＳＯＤ），抗坏血酸过氧化物酶（ＡｓＡＰＯＤ）和谷胱甘肽（ＧＳＨ）含量的影响，并与常规的外源活性氧清除剂８－羟基喹啉（８－ＨＱ），抗坏血酸（ＡｓＡ）进行了比较．结果表明，ＰＱＱ能提高ＳＯＤ，ＡｓＡＰＯＤ活性，增加ＧＳＨ含量．缓解电解质泄漏，减缓质脂过氧化作用．ＰＱＱ可作为活性氧清除剂，调节生物体内自由基代谢平衡，提高植物的抗逆性． The effects of PQQ on superoxide dismutase（SOD） have been studied, AsA peroxidase （AsAPOD）, GSH and electrolytic leakage of cotyledon in cucumber seedling under low temperture stress, meanwhile, 8 HQ,AsA（active oxiygen sca vengers）be made use of compareing with PQQ.The results indicated that the activities of SOD,AsAPOD and content of GSH can be increased by PQQ,The relative conductivity of cotyledon in cucumber seedling was decreased for PQQ possesses the ability of cleaning up free redical of oxygen.we came to the conclusion that PQQ can act as a kind of active oxygen scavenger and adjust the metabolism on free radical of oxygen to balance in plants and enhance resistance finaly in plants. 吡咯啉喹醌 低温胁迫 黄瓜幼苗 活性氧清除剂 防御系统 pyrroloquinoline quinone（PQQ） low temperatural stress cocomber seedling active oxygen cavenger potect system Q945 国家自然科学基金(61672102) 1998-04-01 2021-04-01 4