Molecular Characterization, Pathogenicity and Biological Characterization of Colletotrichum Species Associated with Anthracnose of Camellia yuhsienensis Hu in China

被引：9
|
作者：
Chen, Xinggang [1 ,2 ,3 ,4 ]
Jiang, Lingyu [1 ,2 ,3 ,4 ]
Bao, Anhua [1 ,2 ,3 ,4 ]
Liu, Changlin [1 ,2 ,3 ,4 ]
Liu, Junang [1 ,2 ,3 ,4 ]
Zhou, Guoying [1 ,2 ,3 ,4 ]
机构：
[1] Key Lab Natl Forestry & Grassland Adm Control Dis, Changsha 410004, Peoples R China
[2] Hunan Prov Key Lab Control Forest Dis & Pests, Changsha 410004, Peoples R China
[3] Minist Educ, Key Lab Nonwood Forest Cultivat & Conservat, Changsha 410004, Peoples R China
[4] Cent South Univ Forestry & Technol, Coll Life Sci & Technol, Changsha 410004, Peoples R China
来源：
FORESTS | 2021年 / 12卷 / 12期
基金：
中国国家自然科学基金;
关键词：
tea oil tree; Camellia yuhsienensis Hu; Colletotrichum; anthracnose; morphology; pathogenicity; PH; GLOEOSPORIOIDES;
D O I：
10.3390/f12121712
中图分类号：
S7 [林业];
学科分类号：
0829 ; 0907 ;
摘要：
Camellia yuhsienensis Hu, a species of tea oil tree with resistance to anthracnose, is widely used to breed disease-resistant Camellia varieties. In 2019, anthracnose symptoms were observed on Ca. yuhsienensis for the first time. However, the species and biological characteristics of Colletotrichum spp. isolated from Ca. yuhsienensis (YX-Colletotrichum spp.) have not been elucidated. In this study, five isolates (YX2-5-2, 2YX-3-1, 2YX-5-1, 2YX-8-1-1 and 2YX-8-1-2), which were consistent with the morphological characteristics of Colletotrichum spp., were obtained from Ca. yuhsienensis. A phylogenetic analysis demonstrated that YX2-5-2, 2YX-3-1 and 2YX-8-1-2 belonged to first clade along with Colletotrichum fructicola. 2YX-8-1-1 belonged to the second clade along with Colletotrichum siamense. 2YX-5-1 belonged to the third clade with Colletotrichum camelliae. Pathogenicity tests revealed that the pathogenicity of YX-Colletotrichum spp. was stronger than that of Colletotrichum spp. isolated from Camellia oleifera (GD-Colletotrichum spp.). Biological characteristics illustrated that the mycelial growth of YX-Co. camelliae (2YX-5-1) was slower than that of GD-Co. camelliae when the temperature exceeded 20 degrees C. In addition, in the presence of ions, the mycelial growth of YX-Co. fructicola (YX2-5-2) and YX-Co. siamense (2YX-8-1-1) was also slower than that of GD-Co. fructicola and GD-Co. siamense. Furthermore, the ability of YX-Colletotrichum spp. to utilize lactose and mannitol was weaker than that of GD-Colletotrichum spp., while the ability to utilize NH4+ was generally stronger than that of GD-Colletotrichum spp. This is the first report of anthracnose of Ca. yuhsienensis induced by Co. fructicola, Co. siamense and Co. camelliae in China. These results will provide theoretical guidance for the study of the pathogenesis and control of anthracnose on Ca. yuhsienensis.
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页数：17
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