Red/Far Red Light Controls Arbuscular Mycorrhizal Colonization via Jasmonic Acid and Strigolactone Signaling.

Abstract

Establishment of a nitrogen-fixing symbiosis between legumes and rhizobia not only requires sufficient photosynthate, but also the sensing of the ratio of red to far red (R/FR) light. Here, we show that R/FR light sensing also positively influences the arbuscular mycorrhizal (AM) symbiosis of a legume and a non-legume through jasmonic acid (JA) and strigolactone (SL) signaling. The level of AM colonization in high R/FR light-grown tomato and Lotus japonicus significantly increased compared with that determined for low R/FR light-grown plants. Transcripts for JA-related genes were also elevated under high R/FR conditions. The root exudates derived from high R/FR light-grown plants contained more (+)-5-deoxystrigol, an AM-fungal hyphal branching inducer, than those from low R/FR light-grown plants. In summary, high R/FR light changes not only the levels of JA and SL synthesis, but also the composition of plant root exudates released into the rhizosphere, in this way augmenting the AM symbiosis.

DOI: 10.1093/pcp/pcv135

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Cite this paper

@article{Nagata2015RedFarRL, title={Red/Far Red Light Controls Arbuscular Mycorrhizal Colonization via Jasmonic Acid and Strigolactone Signaling.}, author={Maki Nagata and Naoya Yamamoto and Tamaki Shigeyama and Yohei Terasawa and Toyoaki Anai and Tatsuya Sakai and Sayaka Inada and Susumu Arima and Masatsugu Hashiguchi and Ryo Akashi and Hideyuki Nakayama and Daisuke Ueno and Ann M . Hirsch and Akihiro Suzuki}, journal={Plant & cell physiology}, year={2015}, volume={56 11}, pages={2100-9} }