林苗苗;职倩倩;陈锦永;顾红;张威远;张洋;方金豹;

• 1:中国农业科学院郑州果树研究所·果树生长发育与品质控制重点开放实验室

摘要(Abstract)：

【目的】探明在高温下甜樱桃胚囊败育的原因。【方法】以甜樱桃品种‘早红宝石’(Prunus avium L.‘Zao Hong Bao Shi’)为试材,利用透射电镜分别对露地和日光温室条件下露白期、开花前1 d和开花后1 d胚珠中淀粉和细胞器进行超微结构观察。【结果】(1)发现淀粉颗粒仅存在于珠被上,在珠心细胞中未观察到淀粉颗粒;(2)从花芽露白期到开花后,露地和日光温室‘早红宝石’的胚珠细胞中淀粉粒在逐渐减少,同时线粒体数量在增多且结构越来越完整,畸形、嵴模糊或消失现象在好转;(3)在同一发育时期,露地‘早红宝石’珠被细胞中淀粉粒数量上少于温室的,珠心细胞线粒体数量及结构完整性不及温室的;(4)在珠被细胞中,部分线粒体嵴腔中存在淀粉微粒。【结论】胚囊发育所需的能量可能由珠被淀粉水解后供给,并且珠被的完整性对于胚囊的发育至关重要。

关键词(KeyWords)： 甜樱桃;胚珠;淀粉;细胞器;超微结构

Abstract:

Keywords:

基金项目(Foundation): 中国农科院果树生长发育与品质控制重点开放实验室项目(PP333KF20090101);; 河南省大宗水果产业技术体系

作者(Author): 林苗苗;职倩倩;陈锦永;顾红;张威远;张洋;方金豹;

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