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The function of HgLac in Heterodera glycines and its potential as a control target

文献类型： 外文期刊

作者： Wang, Dongya 1 ; Wu, Fangcao 1 ; Xu, Xiongbiao 1 ; Peng, Deliang 2 ; Duan, Yuxi 3 ; Peng, Huan 2 ; Wu, Haiyan 1 ;

作者机构： 1.Guangxi Univ, Coll Agr, State Key Lab Conservat & Utilizat Subtrop Agrobio, Guangxi Key Lab Agr Environm & Agr Prod Safety, Nanning 530004, Peoples R China

2.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China

3.Shenyang Agr Univ, Coll Plant Protect, Shenyang 110866, Peoples R China

关键词： Laccase; HgLac gene; Heterodera glycines; RNA interference; New target

期刊名称：PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：4.0； 五年影响因子：4.5 ）

ISSN： 0048-3575

年卷期： 2025 年 208 卷

页码：

收录情况： SCI

摘要： The soybean cyst nematode (SCN; Heterodera glycines) is one of the most devastating pathogens for soybean production. The second stage juvenile (J2) invades the host root, develops and form white females which then become brown cysts enter the soil. The brown cyst wall plays a key role in protecting inside eggs from adverse environmental conditions. However, the function of cyst wall tanning (sclerotization and pigmentation) in nematodes is not clear. A browning-related gene discovered from the whole-genome sequencing was cloned and characterized in this study, the gene was confirmed to be the laccase gene and was named HgLac. HgLac mRNA and HgLac protein was detected in the epidermis of juveniles using in situ hybridization and immunolocalization techniques. The HgLac expression level was greater in fourth-stage juveniles (J4s) than in the other stages. Knockdown of HgLac by in vitro RNA interference (RNAi) significantly decreased the infectivity, development and reproduction of J2s but had no effect on cyst wall tanning. Further research revealed that HgLac expression in nematodes was significantly suppressed by 35.41-59.17 % through in planta RNAi, 52.96-58.19 % females could not tan successfully, and the female wall was very soft and fragile, with a low egg hatching rate (1.33 %), which was significantly lower than that of normal females (68.85 %). These results indicate that HgLac plays a key role in cyst wall tanning and suppressing the development and reproduction of the SCN, which provides new ideas for the use of this gene as a target to control SCN.

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