Structure-Function Relations of Strigolactone Analogs： Activity as Plant Hormones and Plant Interactions

作     者：Maja Cohen Cristina Prandi Ernesto G. Occhiato Silvia Tabasso Smadar Wininger Nathalie Resnick Yosef Steinberger Hinanit Koltai Yoram Kapulnik 

作者机构：Institute of Plant Sciences ARO Volcani Center Bet Dagan Israel The Mina and Everard Goodman Faculty of Life Sciences Bar-Ilan University Ramat-Gan Israel Dipartirnento di Chimica Universita di l:orino via R Giuria 7 10125 TorinoItaly Dipartimento di Chimica 'Ugo Schiff' Universita degli Studi di Firenze via della Lastruccia 13 Sesto Fiorentino Firenze Italy 

出 版 物：《Molecular Plant》 (分子植物（英文版）)

年 卷 期：2013年第6卷第1期

页      面：141-152页

核心收录：

学科分类：0710[理学-生物学] 071001[理学-植物学] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0901[农学-作物学] 0703[理学-化学] 0902[农学-园艺学] 

基　　金：supplying us with the SL analogs GR5 and GR7 Dr Koichi Yoneyama from Utsunomiya University for supplying us with the SL analog GR24 

主　　题：strigolactone Arabidopsis Orobanche AM fungus Glomus intraradices root hair seed germination hyphalbranching. 

摘      要：Strigolactones （SLs） have several functions as signaling molecules in their interactions with symbiotic arbus- cular mycorrhizal （AM） fungi and the parasitic weeds Orobanche and Striga. SLs are also a new class of plant hormone regulating plant development. In all three organisms, a specific and sensitive receptor-mediated perception system is suggested. By comparing the activity of synthetic SL analogs on Arabidopsis root-hair elongation, Orobanche aegypti- aca seed germination, and hyphal branching of the AM fungus Glomus intraradices, we found that each of the tested organisms differs in its response to the various examined synthetic SL analogs. Structure-function relations of the SL analogs suggest substitutions on the A-ring as the cause of this variation. Moreover, the description of competitive antagonistic analogs suggests that the A-ring of SL can affect not only affinity to the receptor, but also the molecule＇s ability to activate it. The results support the conclusion that Arabidopsis, Orobanche, and AM fungi possess variations in receptor sensitivity to SL analogs, probably due to variation in SL receptors among the different species.