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Low oxygen responsive small RNAs in Arabidopsis


ABSTRACT: Low-oxygen stress associated with natural phenomena such as waterlogging, results in widespread transcriptome changes and a metabolic switch from aerobic respiration to anaerobic fermentation. High-throughput sequencing of small RNA libraries obtained from low-oxygen stressed and control root tissue identified a total of 65 unique microRNA (miRNA) sequences from 46 families, and 14 trans-acting small interfering RNA (tasiRNA) from 3 families. Low-oxygen stress resulted in changes to the abundance of 46 miRNAs from 19 families, and all 3 tasiRNA families. Chemical inhibition of mitochondrial respiration caused similar changes in expression in a majority of the low-oxygen responsive small RNAs analysed. Our data indicate that miRNAs and tasiRNAs play a role in gene regulation and possibly developmental responses to low oxygen, and that a major signal for these responses is likely to be dependent on mitochondrial function. Keywords: Small RNA transcriptome analysis Examination of root tissue under 2 different environments, control and low oxygen

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Andrew Spriggs 

PROVIDER: E-GEOD-16971 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Hypoxia-responsive microRNAs and trans-acting small interfering RNAs in Arabidopsis.

Moldovan Dov D   Spriggs Andrew A   Yang Jun J   Pogson Barry J BJ   Dennis Elizabeth S ES   Wilson Iain W IW  

Journal of experimental botany 20100101 1


Low-oxygen (hypoxia) stress associated with natural phenomena such as waterlogging, results in widespread transcriptome changes and a metabolic switch from aerobic respiration to anaerobic fermentation. High-throughput sequencing of small RNA libraries obtained from hypoxia-treated and control root tissue identified a total of 65 unique microRNA (miRNA) sequences from 46 families, and 14 trans-acting small interfering RNA (tasiRNA) from three families. Hypoxia resulted in changes to the abundanc  ...[more]

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