Journal
JOURNAL OF PLANT PHYSIOLOGY
Volume 169, Issue 14, Pages 1401-1407Publisher
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.jplph.2012.05.003
Keywords
Citrus; Geraniol; Host-selective toxin; Terpene synthase
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Funding
- Ministry of Education, Culture, Sports, Science and Technology of Japan [21780039]
- Grants-in-Aid for Scientific Research [21780039] Funding Source: KAKEN
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Host-selective toxins (HSTs) produced by some strains of Alternaria alternata are selectively toxic to certain cultivars of plants. However, the role of HSTs in toxin-insensitive plants is currently unknown. Here, we studied the role of ACT-toxin using an ACT-toxin producing A. alternata strain SH20 and the ACT-toxin-insensitive plant rough lemon. Induction of some defense related genes in response to SH20 were faster or stronger than in response to the ACT-toxin deficient SH20 mutant. By sequencing subtractive PCR clones obtained from mRNA of rough lemon leaves inoculated with SH20 after subtraction with that of the ACT-toxin deficient SH20 mutant, we isolated the SH20-responsive genes in rough lemon. Among the SH20-responsive genes analyzed in this study, we isolated a terpene synthase (TPS) gene, RlemTPS3. We also determined that RlemTPS3 localizes to the chloroplast and produces the monoterpene geraniol. (c) 2012 Elsevier GmbH. All rights reserved.
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