Unraveling barley's PAL gene family: a genome-wide study on defense mechanisms against Puccinia graminis f. sp. tritici

Authors

  • Thamer ALBALAWI Prince Sattam Bin Abdulaziz University, College of Science and Humanities, Department of Biology, Alkharj 11942 (SA)

DOI:

https://doi.org/10.15835/nbha52313854

Keywords:

H. vulgare , Puccinia graminis f. sp. Tritici, Phenylalanine ammonia-lyase (PAL), Barley, Transcriptomic, Gene regulation

Abstract

Phenylalanine ammonia lyase (PAL) is a pivotal enzyme bridging primary and secondary phenylpropanoid metabolism, influencing plant growth, development, and stress responses. Despite extensive studies on PAL genes across various plant species, their investigation in barley, a critical staple food globally, has been relatively scarce. In this study, we have successfully identified 10 HvPAL genes, designated as HvPAL genes, in Hordeum vulgare (barley). These HvPAL genes were categorized based on their conserved sequences, which revealed patterns through MEME analysis and multiple sequence alignment. Interestingly, we found cis elements related to stress in the promoter regions of HvPAL genes, indicating their involvement in the response to pathogens. Furthermore, these gene promoters contained components associated with light, development, and hormone responsiveness. This suggests that they may play a role in hormonal developmental processes. MicroRNAs were also identified as regulators of the HvPAL genes we identified highlighting their significance in barley. To further investigate these gene expression patterns, we analyzed the RNA-seq data revealed the upregulating of HvPAL 2, HvPAL3, and HvPAL8, and downregulating HvPAL 5, HvPAL 6, and HvPAL9 genes in this study. This study focused on the regulation of PAL genes in response to 23 different races of Puccinia graminis f. sp. tritici in barley. These results suggest ways to improve traits and develop barley varieties that are resistant to pathogens by selectively increasing the expression of certain HvPAL genes that were not previously regulated. This thorough investigation aims to expand our knowledge of the versatility of the PAL gene family, providing insights for advancements in host -pathogen genetics.

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Published

2024-09-12

How to Cite

ALBALAWI, T. (2024). Unraveling barley’s PAL gene family: a genome-wide study on defense mechanisms against Puccinia graminis f. sp. tritici. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 52(3), 13854. https://doi.org/10.15835/nbha52313854

Issue

Vol. 52 No. 3 (2024)

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Research Articles
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DOI: 10.15835/nbha52313854

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