Abstract
During their lifespan, sessile plants have to cope with bioavailability of the suboptimal nutrient concentration and have to constantly sense/evolve the connecting web of signal cascades for efficient nutrient uptake, storage, and translocation for proper growth and metabolism. However, environmental fluctuations and escalating anthropogenic activities are making it a formidable challenge for plants. This is adding to (micro)nutrient-deficient crops and nutritional insecurity. Biofortification is emerging as a sustainable and efficacious approach which can be utilized to combat the micronutrient malnutrition. A biofortified crop has an enriched level of desired nutrients developed using conventional breeding, agronomic practices, or advanced biotechnological tools. Nutrient homeostasis gets hampered under nutrient stress, which involves disturbance in short-distance and long-distance cell–cell/cell-organ communications involving multiple cellular and molecular components. Advanced sequencing platforms coupled with bioinformatics pipelines and databases have suggested the potential roles of tiny signaling molecules and post-transcriptional regulators, the microRNAs (miRNAs) in key plant phenomena including nutrient homeostasis. miRNAs are seen as emerging targets for biotechnology-based biofortification programs. Thus, understanding the mechanistic insights and regulatory role of miRNAs could open new windows for exploring them in developing nutrient-efficient biofortified crops. This review discusses significance and roles of miRNAs in plant nutrition and nutrient homeostasis and how they play key roles in plant responses to nutrient imbalances/deficiencies/toxicities covering major nutrients—nitrogen (N), phosphorus (P), sulfur (S), magnesium (Mg), iron (Fe), and zinc (Zn). A perspective view has been given on developing miRNA-engineered biofortified crops with recent success stories. Current challenges and future strategies have also been discussed.
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13 June 2022
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References
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VK acknowledge the DST-FIST Program (SR/FST/COLLEGE-/19/568), DBT-Star College (BT/HRD/11/030/2012), and DBT-BUILDER (BT/INF/22/SP45363/2022) programs implemented at the Modern College, Ganeshkhind, Pune, India.
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VK and BNT conceived the idea, wrote, and revised the manuscript. All the authors collected the literature, discussed, wrote, and revised the manuscript. All the authors have approved the final version of the manuscript.
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Jamla, M., Joshi, S., Patil, S. et al. MicroRNAs modulating nutrient homeostasis: a sustainable approach for developing biofortified crops. Protoplasma 260, 5–19 (2023). https://doi.org/10.1007/s00709-022-01775-w
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DOI: https://doi.org/10.1007/s00709-022-01775-w