高浓度CO_2对香蕉和大蕉后熟及果皮叶绿素降解的影响  

Effect of high CO_2 on the ripening and peel chlorophyll degradation in banana and plantain fruits

作　　者：宋慕波 帅良 唐路平[2] 方方[1] 陈振林[1] 段振华[1] SONG Mu-bo SHUAI Liang TANG Lu-ping FANG Fang CHEN Zhen-lin DUAN Zhen-hua(Institute of Food Science and Engineering Technology, Hezhou University, Hezhou 542899, China College of Horticulture, South China Agruicuhural University, Guangzhou 510642, China)

机构地区：[1]贺州学院食品科学与工程技术研究院,广西贺州542899 [2]华南农业大学园艺学院,广东广州510642

出　　处：《食品工业科技》2017年第6期313-318,共6页Science and Technology of Food Industry

基　　金：广西自然科学基金项目(2015GXNSFBA139082);广西科学研究与技术开发计划课题(桂科合14251003);贺州学院博士启动基金(HZUBS201402;HZUBS201405);贺州市科技开发项目(贺科攻1541002)

摘　　要：以香蕉和大蕉为试材,在20%CO_2+21%O_2气调环境和20℃的后熟条件下,通过测定叶绿素含量、果实硬度、细胞膜透性、丙二醛含量、叶绿素酶和脱镁螯合酶活力来研究高浓度CO_2对香蕉和大蕉后熟和果皮叶绿素降解的影响。结果表明:20%CO_2对香蕉和大蕉的后熟和叶绿素b含量均无显著影响,但对叶绿素a含量的影响不同,相比于大蕉,香蕉果皮叶绿素a的降解受到明显抑制;叶绿素酶不是香蕉和大蕉叶绿素降解的关键酶;20%CO_2明显抑制了香蕉脱镁螯合酶的活力,但大蕉脱镁螯合酶的活力反而提高,脱镁螯合酶是香蕉叶绿素降解过程中的关键酶。可见,相比于大蕉,香蕉果皮的褪绿更容易受到高浓度CO_2的贮藏环境的影响。Taking banana and plantain fruits as materials, ripening at 20% CO2 ＋ 21% O2 air environment and 20 -C, the chlorophyll content, fruit firmness, membrane permeability, MDA content, chlorophyllase and Mg- dechelatase activity were determined to study the effect of high CO2 on the ripening and chlorophyll degradation of banana and plantain fruits.The results showed that no significant influence of 20% CO2 on ripening and Chl b content of banana and plantain fruits, however,20% CO2 conferred different effects on Chl a content, compared with plantain, the Chl a in banana peels degradation was significantly inhibited.Chlorophyllase was not a key enzyme of chlorophyll degradation in banana and plantain peels.In banana peels the MDCase activity was inhibited, while in plantain peels the MDCase activity was improved, MDCase was a key enzyme of chlorophyll degradation in banana peels.These findings suggest that the degreening of the banana peel was more likely to be inhibited than plantain when stored at high CO2.

关 键 词：香蕉 大蕉 叶绿素 叶绿素酶 脱镁螯合酶 

分 类 号：TS255.36[轻工技术与工程—农产品加工及贮藏工程]