A new stunt nematode, Geocenamus chengi n. sp. (Nematoda: Merliniinae) in the rhizosphere of tea (Camellia sinensis) from Zhejiang Province, China
A new stunt nematode, Geocenamus chengi n. sp. (Nematoda: Merliniinae) in the rhizosphere of tea (Camellia sinensis) from Zhejiang Province, China
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一种新的特技线虫，Geocenamus hengi n.
DOI：
10.21307/jofnem-2020-042
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发表时间：
2020-01
影响因子：
1.3
通讯作者：
Zheng Jingwu
中科院分区：
文献类型：
--
作者：
Maria Munawar;Miao Wentao;Castillo Pablo;Zheng Jingwu
摘要茶树原产于中国，中国是世界上最大的茶叶产区。在浙江省杭州市茶园中发现了一个矮化线虫种群。这组线虫由根的迁移性外寄生物组成，并且可以在多种宿主植物上生存。因此，采用综合分类学方法对该种群进行了仔细的研究，并将其鉴定为Geocenamus属的一个新种。程氏地灯鱼其特征为：雌性侧区有6个切迹;唇区呈圆顶状，与身体其他部位稍有偏移，有4 ~ 5个环;头部骨架较弱;无鹿;排泄孔位于基咽球的前部。扫描电镜下，外阴为横裂，外阴唇细长，椭圆形，有上睑。尾巴呈环状、细长、圆锥形，尖端钝尖，末端透明，占尾长的21 - 33%。骨针长22 ~ 25 μm，引带呈碟状，囊具圆齿，覆盖尾部直至透明。形态上与G. circellus，G. joctus、黑腹隐翅虫G. loofi，G. ordinarius，普通革蜱G. processus、小突草G. tetyllus和G.折磨人根据28 S、ITS和18 S rRNA基因的D2-D3扩展域对新种进行系统发育分析，结果表明，G.成吉河; sp.与G.越南种
Abstract The tea plant is native to China; the country has the greatest tea production areas in the world. In an attempt to investigate the nematode biodiversity associated with the tea plantations of Hangzhou, Zhejiang Province, a population of stunt nematode was detected. This group of nematodes is comprised of migratory ecto-parasites of roots and can subsist on a variety of host plants. Therefore, the detected population was studied carefully using the integrative taxonomy approach and identified as a new species of genus Geocenamus. Geocenamus chengi n. sp. can be characterized by females having six incisures in the lateral field; labial region is dome shaped and slightly offset from the rest of the body having four to five annuli; head framework is weakly developed; deirids are absent; excretory pore is located at the anterior region of basal pharyngeal bulb. Under SEM, the vulva is a transverse slit, vulval lips are elongated and ellipsoidal with epiptygma. The tail is annulated, elongated, and conical having bluntly pointed tip and a terminal hyaline region that forms 21 to 33% of the tail length. Spicule is 22 to 25 μm long, gubernaculum is saucer shaped; bursa is crenated covering the tail until the hyaline tail region. Morphologically, the species is close to G. circellus, G. joctus, G. loofi, G. ordinarius, G. processus, G. tetyllus, and G. tortilis. Phylogenetic relationships of the new species based on D2-D3 expansion domains of 28 S, ITS, and 18 S rRNA genes indicated that G. chengi n. sp. clustered in a separate clade with G. vietnamensis.
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DOI：
10.1163/187529276x00391
发表时间：
1976
期刊：
Nematologica
影响因子：
--
作者：
M. R. Siddiqi
通讯作者：
M. R. Siddiqi
DOI：
--
发表时间：
1987
期刊：
--
影响因子：
--
作者：
R. Fortuner;M. Luc
通讯作者：
R. Fortuner;M. Luc
DOI：
--
发表时间：
1988
期刊：
--
影响因子：
--
作者：
A. Maggenti;M. Luc;D. Raski;R. Fortuner;E. Geraert
通讯作者：
A. Maggenti;M. Luc;D. Raski;R. Fortuner;E. Geraert
DOI：
--
发表时间：
2004
期刊：
--
影响因子：
--
作者：
Chen Lijie
通讯作者：
Chen Lijie
DOI：
10.1007/978-3-642-31878-8_2
发表时间：
2012
期刊：
--
影响因子：
--
作者：
M. Yao;Liang Chen
通讯作者：
M. Yao;Liang Chen