D-Psicose induces upregulation of defense-related genes and resistance in rice against bacterial blight.

Akihito Kano, Kouji Hosotani, Kenji Gomi, Yumiko Yamasaki-Kokudo, Chikage Shirakawa, Takeshi Fukumoto, Kouhei Ohtani, Shigeyuki Tajima, Ken Izumori, Keiji Tanaka, Yutaka Ishida, Yoko Nishizawa, Kazuya Ichimura, Yasuomi Tada, Kazuya Akimitsu

Index: J. Plant Physiol. 168(15) , 1852-7, (2011)

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Abstract

We examined rice responses to a rare sugar, d-psicose. Rice growth was inhibited by d-psicose but not by common sugars. Microarray analysis revealed that d-psicose treatment caused an upregulation of many defense-related genes in rice, and dose-dependent upregulation of these genes was confirmed by quantitative reverse-transcription polymerase chain reaction. The level of upregulation of defense-related genes by d-psicose was low compared with that by d-allose, which is another rare sugar known to confer induction of resistance to rice bacterial blight in rice. Treatment with d-psicose conferred resistance to bacterial blight in rice in a dose-dependent manner, and the results indicate that d-psicose might be a candidate plant activator for reducing disease development in rice.Copyright © 2011 Elsevier GmbH. All rights reserved.