AI Article Synopsis
- The study explores the expansin gene family, which plays a crucial role in the growth and stress response of crops, focusing on the banana plant, a vital food source in developing countries.
- Researchers identified 58 and 55 expansin genes in the A and B genomes of cultivated bananas and found distinct gene expressions under different stress conditions.
- Results suggest that specific expansin subfamilies contribute significantly to stress resistance, particularly in drought and nematode challenges, indicating potential targets for improving banana resilience.
Article Abstract
Unlabelled: Expansin, a cell wall-modifying gene family, has been well characterized and its role in biotic and abiotic stress resistance has been proven in many monocots, but not yet studied in banana, a unique model crop. Banana is one of the staple food crops in developing countries and its production is highly influenced by various biotic and abiotic factors. Characterizing the expansin genes of the ancestor genome ( and ) of present day cultivated banana will enlighten their role in growth and development, and stress responses. In the present study, 58 (MaEXPs) and 55 (MbaEXPs) putative expansin genes were identified in A and B genome, respectively, and were grouped in four subfamilies based on phylogenetic analysis. Gene structure and its duplications revealed that EXPA genes are highly conserved and are under negative selection whereas the presence of more number of introns in other subfamilies revealed that they are diversifying. Expression profiling of expansin genes showed a distinct expression pattern for biotic and abiotic stress conditions. This study revealed that among the expansin subfamilies, EXPAs contributed significantly towards stress-resistant mechanism. The differential expression of and under drought stress conditions in the contrasting cultivar suggested their role in drought-tolerant mechanism. Most of the genes are differentially expressed in the root lesion nematode contrasting cultivars which speculated that this expansin subfamily might be the susceptible factor. The downregulation of in resistant cultivar during Sigatoka leaf spot infection suggested that by suppressing this gene, resistance may be enhanced in susceptible cultivar. Further, in-depth studies of these genes will lead to gain insight into their role in various stress conditions in banana.
Supplementary Information: The online version contains supplementary material available at 10.1007/s13205-021-03106-x.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8960517 | PMC |
| http://dx.doi.org/10.1007/s13205-021-03106-x | DOI Listing |
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