Hatching stimulation activity of steroidal glycoalkaloids toward the potato cyst nematode, Globodera rostochiensis

被引:11
|
作者
Shimizu, Kosuke [1 ]
Kushida, Atsuhiko [2 ]
Akiyama, Ryota [1 ]
Lee, Hyoung Jae [1 ]
Okamura, Yuya [1 ]
Masuda, Yuki [1 ]
Sakata, Itaru [2 ]
Tanino, Keiji [3 ]
Matsukida, Seiji [4 ,5 ]
Inoue, Tsutomu [4 ]
Sugimoto, Yukihiro [1 ]
Mizutani, Masaharu [1 ]
机构
[1] Kobe Univ, Grad Sch Agr Sci, Nada Ku, 1-1 Rokkodai, Kobe, Hyogo 6578501, Japan
[2] NARO, Hokkaido Agr Res Ctr, Div Agroenvironm Res, Plant Nematol Grp, 1 Hitsujigaoka, Sapporo, Hokkaido 0628555, Japan
[3] Hokkaido Univ, Fac Sci, Dept Chem, Sapporo, Hokkaido 0600810, Japan
[4] Nippon Soda Co Ltd, Odawara Res Ctr, 345 Takada, Odawara, Kanagawa 2500216, Japan
[5] AGC Inc, Res Ctr, 1150 Hazawacho, Yokohama, Kanagawa 2218755, Japan
关键词
hatching factor; hatching of egg; potato cyst nematode; solanoeclepin A; steroidal glycoalkaloids; GLYCINOECLEPIN; BIOSYNTHESIS; STIMULUS;
D O I
10.5511/plantbiotechnology.20.0516a
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Cyst nematodes (Globodera spp. and Heterodera spp.) are highly evolved sedentary endoparasites that are considered as harmful pests worldwide. The hatching of the dormant eggs of cyst nematodes occurs in response to hatching factors (HFs), which are compounds that arc secreted from the roots of host plants. Solanocclepin A (SEA), a triterpene compound, has been isolated as HF for potato cyst nematode (PCN) eggs, whereas other compounds, such as steroidal glycoalkaloids (SGAs), arc also known to show weak hatching stimulation (HS) activity. However, the structures of both compounds are different and the HF-mediated hatching mechanism is still largely unknown. In the present study, we observed specific hatching of PCN eggs stimulated by the hairy root culture media of potato and tomato, revealing the biosynthesis and secretion of HFs. SGAs > such as alpha-solanine, alpha-chaconine, and alpha-tomatine, showed significant HS activity, despite being remarkably less activities than that of SEA. Then, we evaluated the contribution of SGAs on the HS activities of the hairy root culture media. The estimated SGAs content in the hairy root culture media were low and nonconcordant with the HS activity of those, suggesting that the HS activity of SGAs did not contribute much. The analysis of structure-activity relationship revealed that the structural requirements of the HS activity of SGAs are dependent on the sugar moieties attached at the C3 hydoroxyl group and the alkaloid property of their aglycones. The stereochemistry in the EF rings of their aglycone also affected the strength of the HS activity.
引用
收藏
页码:319 / 325
页数:7
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