摘要
以"雨花三号"水蜜桃为试样,研究了桃果实活性氧和线粒体呼吸代谢相关酶的变化对果实成熟衰老进程的影响。结果表明:桃果实成熟过程中硬度下降较快,呼吸强度有明显的高峰,并且果实硬度的快速变化期要明显早于呼吸高峰期。随着桃果实成熟衰老的加剧,果实内活性氧量有累积趋势。桃果实成熟过程中线粒体琥珀酸脱氢酶(SDH)、线粒体细胞色素氧化酶(CCO)、H+-ATPase酶和Ca2+-ATPase酶活性在成熟后期都有不同程度的降低,线粒体的钙含量却增大。活性氧代谢与线粒体内代谢联系紧密,它们是影响果实衰老的重要因素。
The peach fruits of cultivar ＂Yuhua No. 3＂ were used to investigate the effects of changes of active oxygen and mitochondria respiratory metabolism-related enzymes on the maturation of peach fruit. Significant peaks of respiratory intensity lagged behind the rapid change of fruit firmness exist, and there is an accumulation trend in the content of active oxygen along with the intensification of peach fruit maturation. The results also showed that the content of Ca^2＋ in mitochondria increases during the maturation of peach fruits, while the activities of SDH, CCO, H^＋- ATPase and Ca^2＋-ATPase decrease at different degrees in the later period of maturation. It is preliminarily revealed that there is a close relationship between active oxygen metabolism and mitochondrial respiration, and both of them probably play an important role in the ripening and aging of peach fruit.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2009年第8期275-279,共5页
Food Science
基金
国家自然科学基金项目(30570134)
“十一五”国家科技支撑计划项目(2006BAD22B01)
江苏省自然科学基金项目(BK2007076)
关键词
桃果实
成熟
活性氧
线粒体呼吸代谢相关酶
peach fruit
maturation
active oxygen
mitochondria respiratory metabolism-related enzymes
