摘要
采用透射电子显微技术对茄子幼叶和衰老叶的质体小球进行了比较,并着重对衰老叶质体小球的降解途径进行了观察。结果表明,茄子幼叶质体小球小,电子染色深,老叶质体小球大,电子染色浅;老叶中质体小球发生降解,降解发生在叶绿体内或液泡内,显示降解遵循叶绿体途径或液泡途径。在叶绿体途径中,降解不是从质体小球整个表面同时开始,而是从质体小球表面某一点开始,降解区域电子透明,结果使质体小球呈现为一侧凸起而另一侧凹陷。在液泡途径中,液泡中的质体小球由基质包围着,显示质体小球并不单独进入液泡,而是连同部分叶绿体基质一起进入液泡。
Plastoglobules in young and senescent eggplant leaves were observed comparatively and plastoglobule degradation pathways in senescent leaves were investigated,by means of transmission electron microscopy.Plastoglobules were less in number and size and more strongly stained in young leaves than in senescent leaves.Plastoglobules in senescent leaves underwent degradation inside either chloroplasts or vacuoles.Two pathways were demonstrated,chloroplast associated pathway and vacuolar pathway.During the chloroplast associated pathway,chloroplasts are the site for degradation.The degradation was found to happen from one side of the plastoglobule rather than the whole surface of the plastoglobule.As a result,the plastoglobule became convex on the intact side,but concave on the degrading side.During the vacuolar pathway,where vacuoles are the site for the degradation,plastoglobules were showed to be transported into the vacuole together with a portion of chloroplast stroma that surrounded the plastoglobules.
作者
陈雯新
李萌
孙悦宸
毛新月
韩秋爽
刘林
张桂芝
CHENWenxin;LI Meng;SUN Yuechen;MAO Xinyue;HAN Qiushuang;LIU Lin;ZHANG Guizhi(College of Pharmacy,Linyi University,Linyi 276005,Shandong,China)
出处
《中国瓜菜》
CAS
北大核心
2021年第5期109-112,共4页
China Cucurbits And Vegetables
基金
国家自然科学基金(31700238)
大学生创新创业训练项目(202010452156)。
关键词
茄子
叶衰老
质体小球降解
降解途径
Eggplant
Leaf senescence
Plastoglobule degradation
Degradation pathway