Potential of engineering the myo-inositol oxidation pathway to increase stress resilience in plants.

Anshu Alok, Sadhana Singh, Pankaj Kumar, Kaushal K Bhati

Molecular biology reports 2022 Aug

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Myo-inositol is one of the most abundant form of inositol. The myo-inositol (MI) serves as substrate to diverse biosynthesis pathways and hence it is conserved across life forms. The biosynthesis of MI is well studied in animals. Beyond biosynthesis pathway, implications of MI pathway and enzymes hold potential implications in plant physiology and crop improvement. Myo-inositol oxygenase (MIOX) enzyme catabolize MI into D-glucuronic acid (D-GlcUA). The MIOX enzyme family is well studied across few plants. More recently, the MI associated pathway's crosstalk with other important biosynthesis and stress responsive pathways in plants has drawn attention. The overall outcome from different plant species studied so far are very suggestive that MI derivatives and associated pathways could open new directions to explore stress responsive novel metabolic networks. There are evidences for upregulation of MI metabolic pathway genes, specially MIOX under different stress condition. We also found MIOX genes getting differentially expressed according to developmental and stress signals in Arabidopsis and wheat. In this review we try to highlight the missing links and put forward a tailored view over myo-inositol oxidation pathway and MIOX proteins. © 2022. The Author(s), under exclusive licence to Springer Nature B.V.

Citation

Anshu Alok, Sadhana Singh, Pankaj Kumar, Kaushal K Bhati. Potential of engineering the myo-inositol oxidation pathway to increase stress resilience in plants. Molecular biology reports. 2022 Aug;49(8):8025-8035