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Overview of miRNA biogenesis and applications in plants

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Abstract

Numerous types of small RNAs play an important role in sustainable agricultural plant productivity. The micro RNAs (miRNAs) are tiny, 20–24 nt (nucleotides) long, endogenous RNA derived from double-stranded RNA (dsRNA) and their complex biogenesis process will finally yield mature functional miRNAs after multiple events. Among different small RNAs, miRNAs have been mainly studied in plants for their applications that begin from transcriptional regulation of photosynthesis, nutritional homeostasis, growth, and development, yield along with tolerance to various types of stresses including a/biotic stresses. Tissue and stress-specific expression of miRNAs ultimately indicate spatial and temporal regulation of miRNA accumulation and target expression. The approaches of functional genomics studies using gene knock-out and knock-in approaches have been implicated that miRNAs are participated in the developmental process, adaptation to various stresses, enhanced utilization of micronutrients. In this review, we discussed the details on the mechanism and biogenesis of miRNA. Besides, their potential role in phytohormone crosstalk, homeostasis of nutrients, plant growth and development as well as their response to various abiotic stresses. Therefore, elucidation of the detailed molecular mechanism of the regulation of miRNAs with the response to various biotic and abiotic stresses along with spatial/temporal types facilitates the augmentation of improved agronomic traits in crop plants.

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Abbreviations

miRNAs:

Micro RNAs

dsRNA:

Double-stranded RNA

RNA:

Ribonucleic acid

Nt:

Nucleotides

DCL1:

Dicer like 1

HYL1 :

Hyponastic leaves 1

HEN1:

HUA Enhancer 1

AGO1:

Argonaute 1

ESTs:

Expressed sequence tags

RISC:

RNA-induced silencing complex

DDL:

Dawdle protein

MEL1:

Meiosis Arrested at Leptotene 1

HESO1:

HEN1 suppressor1

SLIM1:

Sulfur Limitation1

RAM:

Root apical meristem

SAM:

Shoot apical meristem

siRNAs:

Short interfering RNAs

hpRNAs:

Hairpin RNAs

CUC1:

Cup-shaped cotyledon1

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Funding

This paper was supported by the KU Research Professor Program of Konkuk University, Seoul, South Korea.

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BHG, BV, RK and MT searched the literature, wrote, and revised the manuscript. BS and IMC searched the literature and participated in a discussion of the manuscript.

Corresponding author

Correspondence to Muthu Thiruvengadam.

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The authors declare that they have no conflict of interest.

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This article does not contain any studies with human and animal subjects performed by any of the authors.

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Gangadhar, B.H., Venkidasamy, B., Samynathan, R. et al. Overview of miRNA biogenesis and applications in plants. Biologia 76, 2309–2327 (2021). https://doi.org/10.1007/s11756-021-00763-4

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  • DOI: https://doi.org/10.1007/s11756-021-00763-4

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