Differentially Expressed MicroRNAs Link Cellular Physiology to Phenotypic Changes in Rice Under Stress Conditions

Plant & Cell Physiology
Rumdeep K GrewalSudip Kundu

Abstract

Plant microRNAs (miRNAs) and their target genes have important functional roles in nutrition deficiency and stress response. However, the underlying mechanisms relating relative expression of miRNAs and target mRNAs to morphological adjustments are not well defined. By combining miRNA expression profiles, corresponding target genes and transcription factors that bind to computationally identified over-represented cis-regulatory elements (CREs) common in miRNAs and target gene promoters, we implement a strategy that identifies a set of differentially expressed regulatory interactions which, in turn, relate underlying cellular mechanisms to some of the phenotypic changes observed. Integration of experimentally reported individual interactions with identified regulatory interactions explains how (i) during mineral deficiency osa-miR167 inhibits shoot growth but activates adventitious root growth by influencing free auxin content; (ii) during sulfur deficiency osa-miR394 is involved in adventitious root growth inhibition, sulfur and iron homeostasis, and auxin-mediated regulation of sulfur homeostasis; (iii) osa-miR399 contributes to cross-talk between cytokinin and phosphorus deficiency signaling; and (iv) a feed-forward loop invo...Continue Reading

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Citations

Mar 16, 2019·Genes·Aleksandra Swida-Barteczka, Zofia Szweykowska-Kulinska
Aug 4, 2019·International Journal of Molecular Sciences·Kalaivani Nadarajah, Ilakiya Sharanee Kumar
Apr 13, 2020·Journal of Experimental Botany·Serena VarottoDragana Miladinović
Oct 31, 2020·Frontiers in Plant Science·Mariem Mhimdi, José Manuel Pérez-Pérez

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