Elevated carbon dioxide and drought modulate physiology and storage-root development in sweet potato by regulating microRNAs

Functional & Integrative Genomics
Thangasamy SaminathanUmesh K Reddy

Abstract

Elevated CO2 along with drought is a serious global threat to crop productivity. Therefore, understanding the molecular mechanisms plants use to protect these stresses is the key for plant growth and development. In this study, we mimicked natural stress conditions under a controlled Soil-Plant-Atmosphere-Research (SPAR) system and provided the evidence for how miRNAs regulate target genes under elevated CO2 and drought conditions. Significant physiological and biomass data supported the effective utilization of source-sink (leaf to root) under elevated CO2. Additionally, elevated CO2 partially rescued the effect of drought on total biomass. We identified both known and novel miRNAs differentially expressed during drought, CO2, and combined stress, along with putative targets. A total of 32 conserved miRNAs belonged to 23 miRNA families, and 25 novel miRNAs were identified by deep sequencing. Using the existing sweet potato genome database and stringent analyses, a total of 42 and 22 potential target genes were predicted for the conserved and novel miRNAs, respectively. These target genes are involved in drought response, hormone signaling, photosynthesis, carbon fixation, sucrose and starch metabolism, etc. Gene ontology and K...Continue Reading

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Citations

Jun 6, 2020·Plant & Cell Physiology·Paramita PalitRajeev K Varshney
Apr 4, 2021·Life·Saurabh ChaudharyPrakash Chand Sharma
Jun 3, 2021·International Journal of Molecular Sciences·Carlos Lopez-OrtizUmesh K Reddy

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Datasets Mentioned

BETA
SRP146062

Methods Mentioned

BETA
environmental stress
PCR

Software Mentioned

psRobot
SPSS
SOAP
miRDeep2
RNAfold

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