外源硒对番茄采后成熟衰老的生理调控机制  

The physiology effect of selenium on postharvest tomato fruit ripening and senescence

作　　者：吴洁 付求来 李婧婧 朱先飞 李淼[2] WU Jie;FU Qiulai;LI Jingjing;ZHU Xianfei;LI Miao(Anhui Fengda Seed Co.,Ltd.,Hefei 230031;Key Laboratory of Agri-Food Safety of Anhui Province,School of Plant Protection,Anhui Agriculture University,Hefei 230036)

机构地区：[1]安徽丰大种业股份有限公司,合肥230031 [2]安徽省农产品安全重点实验室,安徽农业大学植物保护学院,合肥230036

出　　处：《安徽农业大学学报》2020年第1期155-160,共6页Journal of Anhui Agricultural University

基　　金：安徽高校自然科学研究重点项目(KJ2017A159)资助。

摘　　要：以番茄果实为试验材料,研究亚硒酸钠(Na2SeO3)处理对采后果实成熟衰老的影响,并通过测定果实外观品质、营养物质含量、丙二醛(malondialdehyde,MDA)含量及抗氧化酶活性,探讨其作用机理。结果显示,浓度为25 mg·L^-1的Na2Se 3溶液浸泡处理后,在贮藏期第4天,对照组番茄的L*值含量为硒处理组的87.9%;在贮藏期第6天,硒处理组果实的MDA和可溶性固形物含量分别为对照组的54%和93%;在贮藏末期,果实硬度、可滴定酸、抗坏血酸(Vc)含量、过氧化氢酶(catalase,CAT)和过氧化物酶(peroxidase,POD)活性分别是对照组的1.24、1.26、1.12、1.67和1.61倍,说明硒可有效保持番茄的色泽、硬度等外观品质,抑制Vc、可滴定酸等营养物质含量的下降,延缓MDA和可溶性固形物含量的上升,提高CAT、POD活性。To investigate the physiology effect of sodium selenite(Na2SeO3) on postharvest tomato fruit ripening and senescence, we used Na2SeO3 solution to treat tomato fruits The appearance quality, nutritional components, contents of malondialdehyde(MDA) and activities of antioxidant enzymes were tested to evaluate the mechanism of sodium selenite. The results showed that tomato fruits soaked treatment by 25 mg·L^-1 Na2SeO3 solution lead L* value of control group decreased to 87.9% of Se-treated group at day 4. Contents of MDA and soluble solid of Se-treated group were 54% and 93% of control at day 6. Hardness, content of titratable acid, ascorbic acid(Vc), activities of catalase(CAT) and peroxidase(POD) were 1.24, 1.26, 1.12, 1.67 and 1.61 fold of control. These results indicated that 25 mg·L^-1 Na2SeO3 could maintain the color and hardness of tomato fruit, inhibited the decrease of nutritional quality such as Vc, titratable acid, reduce the content of MDA and soluble solid, and increase the activity of CAT and POD.

关 键 词：硒 番茄果实 成熟衰老 抗氧化 

分 类 号：S641.209[农业科学—蔬菜学]