Journal
GENOMICS
Volume 113, Issue 5, Pages 3357-3372Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ygeno.2021.07.029
Keywords
Fe and Zn withdrawal; Transcriptome; Phytosiderophore; Methionine cycle; Transporters; miRNAs; Antioxidants; Wheat (Triticum aestivum L; )
Funding
- Indian Council of Agricultural Research, Department of Agricultural Research and Education, Govt. [1006422, CRSCIIWBRSIL 201500900190]
- Department of Biotechnology [BT/NABI-Flagship/2018]
- NIFA [812627, 1006422] Funding Source: Federal RePORTER
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The study comprehensively analyzed the impact of different iron and zinc contents in two wheat genotypes on their tolerance, revealing that Narmada 195 showed stronger tolerance to iron and zinc deficiency. Core genes and microRNAs identified in the study provide valuable resources for further genetic improvement of iron and zinc content in wheat grains.
The combined effect of iron (Fe) and zinc (Zn) starvation on their uptake and transportation and the molecular regulatory networks is poorly understood in wheat. To fill this gap, we performed a comprehensive physiological, biochemical and transcriptome analysis in two bread wheat genotypes, i.e. Narmada 195 and PBW 502, differing in inherent Fe and Zn content. Compared to PBW 502, Narmada 195 exhibited increased tolerance to Fe and Zn withdrawal by significantly modulating the critical physiological and biochemical parameters. We identified 25 core genes associated with four key pathways, i.e. methionine cycle, phytosiderophore biosynthesis, antioxidant and transport system, that exhibited significant up-regulation in both the genotypes with a maximum in Narmada 195. We also identified 26 microRNAs targeting 14 core genes across the four pathways. Together, core genes identified can serve as valuable resources for further functional research for genetic improvement of Fe and Zn content in wheat grain.
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