Brassinosteroid-related transcription factor BIL1/BZR1 increases plant resistance to insect feeding. Issue 6 (3rd June 2014)

• Record Type: Journal Article
• Authors: Miyaji, Tomoko; Yamagami, Ayumi; Kume, Nao; Sakuta, Masaaki; Osada, Hiroyuki; Asami, Tadao; Arimoto, Yutaka; Nakano, Takeshi
• Is Part Of: Bioscience, biotechnology, and biochemistry. Volume 78:Issue 6(2014)
• Page Start: 960
• Page End: 968
• Publication Date: 2014-06-03
• Subjects: brassinosteroid -- signaling -- BIL1/BZR1 -- onion thrips -- jasmonate; Biotechnology -- Periodicals; Biochemistry -- Periodicals; 660.6
• DOI: 10.1080/09168451.2014.910093
• Languages: English
• ISSNs: 0916-8451

Abstract

Abstract: The plant steroid hormones brassinosteroids (BRs) play important roles in plant growth and responses to stresses. The up-regulation of pathogen resistance by BR signaling has been analyzed, but the relationship between BR and insect herbivores remains largely unclear. BIL1/BZR1 is a BR master transcription factor known to be involved in the regulation of plant development through work conducted on a gain of function mutation. Here, we analyzed the function of BIL1/BZR1 in response to insect feeding and demonstrated that resistance against thrip feeding was increased in the bil1-1D/bzr1-1D mutant compared to wild-type. We generated Lotus japonicus transgenic plants that over-express the Arabidopsis bil1/bzr1 mutant, Lj - bil1/bzr1 - OX . The Lj - bil1/bzr1 - OX plants showed increased resistance to thrip feeding. The expression levels of the jasmoninc acid (JA)-inducible VSP genes were increased in both Arabidopsis bil1-1D/bzr1-1D mutants and L. japonicus Lj - bil1/bzr1 - OX plants. The resistance to thrip feeding caused by the BIL1/BZR1 gene may involve JA signaling. Graphical abstract: : Over-Expression mutated bil1/bzr1 that is brassinosteroid master transcription factor gives resistance against the thrips feeding to plants.