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Shanshan Xie, Haiyang Jiang, Ting Ding, Qianqian Xu, Wenbo Chai, Beijiu Cheng
Bacillus amyloliquefaciens FZB42 is a type of plant growth-promoting rhizobacterium (PGPR) which activates induced systemic resistance (ISR) in Arabidopsis. Blocking of the synthesis of cyclic lipopeptides and 2,3-butanediol by FZB42, which have been demonstrated to be involved in the priming of ISR, results in the abolishment of the plant defence responses. To further clarify the ISR activated by PGPRs at the microRNA (miRNA) level, small RNA (sRNA) libraries from Arabidopsis leaves after root irrigation with FZB42, FZB42ΔsfpΔalsS and control were constructed and sequenced...
July 2018: Molecular Plant Pathology
Fan Jia, Christopher D Rock
Plant microRNAs (miRNAs) are important regulators of development and stress responses and are oftentimes under transcriptional regulation by stresses and plant hormones. We recently showed that polycistronic MIR842 and MIR846 are expressed from the same primary transcript which is subject to alternative splicing. ABA treatment affects the alternative splicing of the primary cistronic transcript which results in differential expression of the two miRNAs that are predicted to target the same family of jacalin lectin genes...
June 2013: Plant Signaling & Behavior
Fan Jia, Christopher D Rock
MicroRNAs (miRNAs) are ~21-nucleotide long endogenous small RNAs that regulate gene expression through post-transcriptional or transcriptional gene silencing and/or translational inhibition. miRNAs can arise from the "exon" of a MIRNA gene, from an intron (e.g. mirtrons in animals), or from the antisense strand of a protein coding gene (natural antisense microRNAs, nat-miRNAs). Here we demonstrate that two functionally related miRNAs, miR842 and miR846, arise from the same transcription unit but from alternate splicing isoforms...
March 2013: Plant Molecular Biology
Gang Liang, Hua He, Diqiu Yu
microRNAs (miRNAs) are a class of negative regulators that take part in many processes such as growth and development, stress responses, and metabolism in plants. Recently, miRNAs were shown to function in plant nutrient metabolism. Moreover, several miRNAs were identified in the response to nitrogen (N) deficiency. To investigate the functions of other miRNAs in N deficiency, deep sequencing technology was used to detect the expression of small RNAs under N-sufficient and -deficient conditions. The results showed that members from the same miRNA families displayed differential expression in response to N deficiency...
2012: PloS One
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