Significance of ABA Biosynthesis in Plant Adaptation to Drought Stress

Zareen, Shah; Ali, Akhtar; Yun, Dae-Jin

doi:10.1007/s12374-024-09425-9

Cited by 2 publications

(1 citation statement)

References 99 publications

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“…The enrichment of rapidly evolving genes in biosynthetic processes, including the “regulation of biosynthetic process”, “aromatic compound biosynthetic process”, “heterocycle biosynthetic process”, and “organic cyclic compound biosynthetic process”, indicates that M. lotungensis may have undergone adaptive changes in the production of secondary metabolites. These metabolites, such as aromatic compounds, heterocycles, and organic cyclic compounds, play diverse roles in plant defense, signaling, and environmental interactions [ 55 , 56 , 57 , 58 , 59 ]. The rapid evolution of genes related to their biosynthesis suggests that M. lotungensis may have evolved unique chemical defenses or communication strategies to cope with biotic and abiotic stresses in its specific ecological niche.…”

Section: Discussionmentioning

confidence: 99%

Transcriptomic Analysis Reveals Adaptive Evolution and Conservation Implications for the Endangered Magnolia lotungensis

Shi,

Xie,

Guan

et al. 2024

Genes

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Magnolia lotungensis is an extremely endangered endemic tree in China. To elucidate the genetic basis of M. lotungensis, we performed a comprehensive transcriptome analysis using a sample integrating the plant’s bark, leaves, and flowers. De novo transcriptome assembly yielded 177,046 transcripts and 42,518 coding sequences. Notably, we identified 796 species-specific genes enriched in organelle gene regulation and defense responses. A codon usage bias analysis revealed that mutation bias appears to be the primary driver of selection in shaping the species’ genetic architecture. An evolutionary analysis based on dN/dS values of paralogous and orthologous gene pairs indicated a predominance of purifying selection, suggesting strong evolutionary constraints on most genes. A comparative transcriptomic analysis with Magnolia sinica identified approximately 1000 ultra-conserved genes, enriched in essential cellular processes such as transcriptional regulation, protein synthesis, and genome stability. Interestingly, only a limited number of 511 rapidly evolving genes under positive selection were detected compared to M. sinica and Magnolia kuangsiensis. These genes were enriched in metabolic processes associated with adaptation to specific environments, potentially limiting the species’ ability to expand its range. Our findings contribute to understanding the genetic architecture of M. lotungensis and suggest that an insufficient number of adaptive genes contribute to its endangered status.

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Section: Discussionmentioning

confidence: 99%

Transcriptomic Analysis Reveals Adaptive Evolution and Conservation Implications for the Endangered Magnolia lotungensis

Shi,

Xie,

Guan

et al. 2024

Genes

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Exploring the Genetic Basis of Drought Tolerance in Alhagi camelorum: A Comprehensive Transcriptome Study of Osmotic Stress Adaptations

Tang,

Li,

Zeng

et al. 2024

IJMS

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Alhagi camelorum, a desert shrub known for its impressive drought tolerance, exhibits notable resilience under arid conditions. However, the underlying mechanisms driving its drought resistance remain largely unexplored. This study aims to investigate these mechanisms by exposing A. camelorum to osmotic stress using varying polyethylene glycol (PEG) concentrations (1%, 5%, 10%) in a controlled laboratory setting. Growth analysis revealed significant inhibition and phenotypic changes with increasing PEG levels. Transcriptomic analysis, including differentially expressed gene identification, GO enrichment analysis, and hierarchical cluster analysis of genes in roots and shoots, identified key pathways associated with drought adaptation, such as ABA-activated signaling, cell wall biogenesis, photosynthesis, and secondary metabolite biosynthesis. Notably, some genes involved in these pathways exhibited tissue-specific expression patterns and showed PEG concentration-dependent regulation. Key findings include the dose-dependent (R2 > 0.8) upregulation of a proline-rich protein (Asp01G030840) and a BURP domain-containing protein (Asp02G039780), as well as critical genes involved in cell wall biogenesis (encoding Pectinesterase inhibitor domain-containing and Fasciclin-like arabinogalactan protein), and secondary metabolite biosynthesis (encoding enzymes for terpenoid and flavonoid biosynthesis). The regulation of these genes is likely influenced by phytohormones such as ABA and other stress-related hormones, along with significant transcription factors like ABI4, TALE, MYB61, GRAS, and ERF. These insights lay the groundwork for further research into the functional roles of these genes, their regulatory networks, and their potential applications in enhancing drought resistance in desert plants and agricultural crops.

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Significance of ABA Biosynthesis in Plant Adaptation to Drought Stress

Cited by 2 publications

References 99 publications

Transcriptomic Analysis Reveals Adaptive Evolution and Conservation Implications for the Endangered Magnolia lotungensis

Transcriptomic Analysis Reveals Adaptive Evolution and Conservation Implications for the Endangered Magnolia lotungensis

Exploring the Genetic Basis of Drought Tolerance in Alhagi camelorum: A Comprehensive Transcriptome Study of Osmotic Stress Adaptations

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