AI Article Synopsis
- MDH (malate dehydrogenase) is crucial for plant growth and stress responses, particularly in rice, where 12 family members were identified and classified based on their genetic relationships.
- Evolutionary analysis indicated that rice MDH proteins are closely related to those in maize and wheat, highlighting their conservation during domestication, with segmental duplication events contributing to family expansion.
- Gene expression studies revealed that several MDH genes respond to salt stress, suggesting that specific genetic variations may enhance salt tolerance in rice, paving the way for potential improvements in crop resilience.
Article Abstract
Malate dehydrogenase (MDH) is widely present in nature and regulates plant growth and development, as well as playing essential roles, especially in abiotic stress responses. Nevertheless, there is no comprehensive knowledge to date on family members in rice. In this study, a total of 12 members in rice were identified through genome-wide analysis and divided into three groups on the basis of their phylogenetic relationship and protein-conserved motifs. Evolutionary analysis showed that MDH proteins from rice, maize and wheat shared a close phylogenetic relationship, and the family was conserved in the long-term process of domestication. We identified two segmental duplication events involving four genes, which could be the major force driving the expansion of the family. The expression profile, cis-regulatory elements and qRT-PCR results of these genes revealed that a few showed high tissue specificity, almost all of which had stress response elements in the promoter region, and ten members were significantly induced by salt stress. Through gene-based association analysis, we found a significant correlation between salt tolerance at the seedling stage and the genetic variation of and . Additionally, we found that the polymorphism in the promoter region of might be related to the salt tolerance of rice. This study aimed to provide valuable information on the functional study of the rice gene family related to salt stress response and revealed that might be an important gene for the cultivar improvement of salt tolerance in rice.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182821 | PMC |
| http://dx.doi.org/10.3390/plants11111498 | DOI Listing |
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