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Semin Cell Dev Biol. 2010 Oct;21(8):805-11. doi: 10.1016/j.semcdb.2010.04.001. Epub 2010 Apr 14.

MicroRNAs with macro-effects on plant stress responses.

Author information

1
Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK 74078, USA. ramanjulu.sunkar@okstate.edu

Abstract

Being sessile organisms, plants often have to face challenges posed by environmental stresses. To minimize the cellular damage caused by stress, plants have evolved highly complex but well-coordinated adaptive responses operating at the transcriptional, post-transcriptional, translational and post-translational levels. A thorough understanding of regulation at all levels will provide better tools to improve plant's performance under stress. Dramatic changes in the levels of several hundreds or even thousands of mRNAs/proteins were evident under stress as revealed by high-throughput microarray and proteome analyses and such changes were thought to be dependent on transcriptional (induction or suppression of genes) or post-translational regulation (protein stability and degradation). However, recently discovered 21-24 nt small RNAs (microRNAs [miRNAs] and small-interfering RNAs [siRNAs]), which regulate gene expression at the post-transcriptional level, are also modulated during stress and possibly contribute to the stress-induced changes in profiles of mRNAs or proteins. This review highlights our understanding of the role of small RNAs in plant stress responses.

PMID:
20398781
DOI:
10.1016/j.semcdb.2010.04.001
[Indexed for MEDLINE]

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