摘要
用室内接种和田间调查的方法，研究了茶赤叶斑病（ＰｈｙｌｏｓｔｉｃｔａｔｈｅｉｃｏｌａＰｅｔｃｈ）与茶树叶片结构及空间位置的关系。结果表明：该病原菌容易侵染茶树新梢的嫩叶，在老叶（芽下四叶及其以下）表面则难以形成附着胞，即使侵入了，菌丝的分枝、生长也较缓慢；近平展着生的嫩叶及叶片伤口更易感染；茶树品种间因叶片角质层的厚度、栅栏组织层次和海绵组织细胞排列松紧，其发病率表现出明显的差异。
In vitro inocuations in laboratories and field observations were carried out to investigate the correlation between the occurrence of Red Leaf Spot (Phyllosticta theicola Petch)and the structure and spatial position of leaves.Tender leaves,i.e.the first and the second leaves below buds,were easily infected by the pathogen,but it was difficult for the pathogen to form appresoria on the surfaces of mature leaves,for examle,the fourth and the fifth leaves below buds.Even if the pathogen penetrated the mature leaves,the hyphae branched out and grew slowly in the leaf tissues.Tender leaves spreading horizontally and wounded leaves were most easily infected.The incidence of the disease differed significantly from cultivars because of the variations of the leaf cuticle thickness,the palisade layer and the spongy cell arrangement among the cultivars.Cultivars with thick leaf cuticle and more palisade layer possessed a relatively strong resistance to the disease.
出处
《茶叶科学》
CAS
CSCD
1997年第1期21-26,共6页
Journal of Tea Science
关键词
茶赤叶斑病
茶树
叶片
解剖结构
叶位
Tea Red Leaf Spot Tea leaf Leaf structure Leaf position Leaf spreading angle
