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Observation on Morphological and Structural Characteristics of Ovary Gall and Leaf Gall Induced by Exobasidium gracile in Camellia oleifera
Author(s): 
Pages: 1752-1757
Year: Issue:  9
Journal: Acta Botanica Boreali-Occidentalia Sinica

Keyword:  茶油子房瘿体叶片瘿体形态结构;
Abstract: 采用光学显微镜观察了油茶叶肿病子房瘿体和叶片瘿体的形态特征和组织结构特点.结果表明:(1)油茶叶肿病瘿体是油茶的幼嫩子房和幼叶被细丽外担菌感染后所导致的组织增生而成的,细丽外担菌分布于成熟子房瘿体的外表面和叶片瘿体的表面.(2)子房瘿体由受感染的雌蕊子房增殖而来,成熟后表皮层脱落.(3)子房壁分两层,外层子房壁肉质肥厚,主要由大型薄壁细胞构成,是食用的主要部分,内层子房壁为较薄的心皮层,内外两层子房壁之间具有较大的空隙;心皮内有胚珠,胚珠着生在中轴胎座上,胚珠内部中空而没有育性.(4)叶片瘿体为受感染的幼嫩叶片增殖所致,由大型薄壁细胞构成,瘿体表面具表皮层,成熟后表皮脱落.(5)在正常叶片与叶片瘿体的过渡区内有维管束相通,瘿体侧的厚度比正常叶片厚度增加3~4倍,细胞体积增大5~l0倍,但瘿体细胞内无叶绿体.
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