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<p>Calcium dependent protein kinases (CDPKs) are very important calcium-sensing protein kinases which decode intracellular calcium signals and transduce them into phosphorylation-mediated signaling events that allows plants to survive under environment stresses. While the function of this gene family has been well studied in several model plant species, however, it is still unexplored in the economically and ecologically important genus <i>Dalbergia</i>. Therefore, in this study, comprehensive genome-wide analysis of calcium-dependent protein kinase (CDPK) gene family was conducted across seven <i>Dalbergia</i> species followed by expression profiling in resistant and susceptibility genotypes of <i>Dalbergia</i> species under drought stress. A total 116 genes were identified including 28 in D. <i>sissoo</i>, 16 in <i>D. oliveri</i>, 15 in <i>D. melanoxylon</i>, 11 in <i>D. frutescens</i>, 14 in <i>D. cochinchinensis</i>, 13 in <i>D. miscolobium</i>, and 19 in <i>D. odorifera</i>. The phylogenetic tree analysis shows that these genes belong to four different clades. Conserved motif analysis revealed a high degree of structural conservation among CDPK proteins across all species identified members. Functional enrichment analysis showed enrichment of protein phosphorylation, signal transduction and stress responsive biological processes.The expression profiling under drought stress revealed differential expression patterns of several <i>D. sissoo</i> CDPK genes between resistant and susceptibility genotypes which indicating their potential role in drought stress. Overall, this study provides the systematic characterization of calcium-dependent protein kinase (CDPKs) gene family in Dalbergia species and highlights their potential contribution to drought tolerance offering valuable insights for further conservation and genetic improvement efforts.</p>

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Unraveling the CDPK gene superfamily in Dalbergia species by comparative genomics and drought stress responsiveness

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年8月4日

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  • Urva Ajmal,
  • Arfa Tanveer,
  • Rana Muhammad Atif,
  • Muhammad Tehseen Azhar,
  • Muhammad Usman,
  • Zulfiqar Ali,
  • Iqrar Ahmad Rana

摘要

Calcium dependent protein kinases (CDPKs) are very important calcium-sensing protein kinases which decode intracellular calcium signals and transduce them into phosphorylation-mediated signaling events that allows plants to survive under environment stresses. While the function of this gene family has been well studied in several model plant species, however, it is still unexplored in the economically and ecologically important genus Dalbergia. Therefore, in this study, comprehensive genome-wide analysis of calcium-dependent protein kinase (CDPK) gene family was conducted across seven Dalbergia species followed by expression profiling in resistant and susceptibility genotypes of Dalbergia species under drought stress. A total 116 genes were identified including 28 in D. sissoo, 16 in D. oliveri, 15 in D. melanoxylon, 11 in D. frutescens, 14 in D. cochinchinensis, 13 in D. miscolobium, and 19 in D. odorifera. The phylogenetic tree analysis shows that these genes belong to four different clades. Conserved motif analysis revealed a high degree of structural conservation among CDPK proteins across all species identified members. Functional enrichment analysis showed enrichment of protein phosphorylation, signal transduction and stress responsive biological processes.The expression profiling under drought stress revealed differential expression patterns of several D. sissoo CDPK genes between resistant and susceptibility genotypes which indicating their potential role in drought stress. Overall, this study provides the systematic characterization of calcium-dependent protein kinase (CDPKs) gene family in Dalbergia species and highlights their potential contribution to drought tolerance offering valuable insights for further conservation and genetic improvement efforts.