Regulation of biosynthesis, perception, and functions of strigolactones for promoting arbuscular mycorrhizal symbiosis and managing root parasitic weeds. Issue 9 (5th April 2019)

• Record Type: Journal Article
• Authors: Yoneyama, Koichi; Xie, Xiaonan; Yoneyama, Kaori; Nomura, Takahito; Takahashi, Ikuo; Asami, Tadao; Mori, Narumi; Akiyama, Kohki; Kusajima, Miyuki; Nakashita, Hideo
• Is Part Of: Pest management science. Volume 75:Issue 9(2019)
• Page Start: 2353
• Page End: 2359
• Publication Date: 2019-04-05
• Subjects: AM symbiosis -- biosynthesis -- inhibitor -- pathogen resistance -- root parasitic weed -- strigolactone; Pests -- Control -- Periodicals; Pesticides -- Periodicals; 632.9
• DOI: 10.1002/ps.5401
• Languages: English
• ISSNs: 1526-498X

Abstract

Abstract: Strigolactones (SLs) are carotenoid‐derived plant secondary metabolites that play important roles in various aspects of plant growth and development as plant hormones, and in rhizosphere communications with symbiotic microbes and also root parasitic weeds. Therefore, sophisticated regulation of the biosynthesis, perception and functions of SLs is expected to promote symbiosis of beneficial microbes including arbuscular mycorrhizal (AM) fungi and also to retard parasitism by devastating root parasitic weeds. We have developed SL mimics with different skeletons, SL biosynthesis inhibitors acting at different biosynthetic steps, SL perception inhibitors that covalently bind to the SL receptor D14, and SL function inhibitors that bind to the serine residue at the catalytic site. In greenhouse pot tests, TIS108, an azole‐type SL biosynthesis inhibitor effectively reduced numbers of attached root parasites Orobanche minor and Striga hermonthica without affecting their host plants; tomato and rice, respectively. AM colonization resulted in weak but distinctly enhanced plant resistance to pathogens. SL mimics can be used to promote AM symbiosis and to reduce the application rate of systemic‐acquired resistance inducers which are generally phytotoxic to horticultural crops. © 2019 Society of Chemical Industry Abstract : Strigolactone (SL) mimics, and inhibitors of the biosynthesis, perception and function of SLs were developed. TIS108, an azole‐type SL biosynthesis inhibitor effectively reduced the numbers of attached root parasitic weeds.