Methiin as a nematode attractant inAllium sativum

Author:

Takada Noboru1,Sutoh Sayaka1,Toyota Masuru1,Yamazaki Yoshihisa2,Kitano-Yamashita Nozomi3,Ushida Chisato1,Yamashita Kazuo3

Affiliation:

1. Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki 036-8561, Japan.

2. Aomori Prefectural Industrial Technology Research Center, Kuroishi 036-0522, Japan.

3. Vegetable Research Institute, Aomori Prefectural Industrial Technology Research Center, Inuotose, Rokunohe-ho, 033-0071, Japan.

Abstract

Damage to garlic (Allium sativum L.) caused by nematodes (Ditylenchus destructor Thorne) is becoming a serious agricultural hazard, leading to a great loss in garlic production. Once the garlic bulbs are invaded, the pathogenic nematode drastically increases in number along with the rotting of bulbs. It was therefore conceived that nematode attractants are present in the bulbs. Based on this hypothesis, chemical investigations were performed to explore a nematode attractant in A. sativum bulbs, which resulted in the identification of methiin (S-methyl-l-cysteine S-oxide) as an attractant. Bioassay and quantification experiments of methiin in extracts of A. sativum bulb led to the conclusion that methiin possesses sufficient potential to attract D. destructor into A. sativum bulbs. Moreover, an activity comparing study of methiin with its analogs showed that the sulfoxide functionality is essential for attractant activity. Moreover, methiin was revealed to attract Caenorhabditis elegans. Further investigation of methiin will help to elucidate the neuronal system of D. destructor.

Publisher

Canadian Science Publishing

Subject

Organic Chemistry,General Chemistry,Catalysis

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