Journal
JOURNAL OF PLANT GROWTH REGULATION
Volume 31, Issue 1, Pages 38-46Publisher
SPRINGER
DOI: 10.1007/s00344-011-9217-9
Keywords
MicroRNA; Microarray; Botrytis cinerea; Gene expression regulators; Tomato
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Funding
- Province Natural Science Foundation of Shaanxi [SJ082ZT04]
- Natural Science Foundation of China [31000913]
- Ministry of Education of China [20100204120024]
- Foundation of Young Aged Academic Backbone of the Northwest A&F University in China
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Botrytis cinerea Pers.:Fr. is an important pathogen in tomato plants that causes stem rot of tomatoes grown indoors for an extended period. MicroRNAs (miRNAs) have recently been reported as a class of gene expression regulators linked to stress responses; however, data on the role of miRNAs in plant responses to biotic stresses are still limited. In this study, three Botrytis stress-responsive miRNAs were identified using microarray analysis and the effects of Botrytis infection were surveyed in tomatoes. Two downregulated miRNAs and one upregulated miRNA were detected. These stress-responsive miRNAs regulated metabolic, morphological, and physiological adaptations of tomato seedlings at the post-transcriptional level. The presence of stress-related elements in the miRNA promoter regions further supports our results. These findings extend the current view about miRNAs as ubiquitous regulators under stress conditions.
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