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<p>Previous studies have demonstrated that porcine blood polypeptide (PBP) could mitigate plant damage under adverse conditions. This study was conducted to systematically investigate the possible role of PBP in enhancing drought resistance in wheat through comprehensive physiological and biochemical analyses, as well as transcriptomic analysis. Morphological observations revealed that PBP-primed seedlings exhibited improved growth, biomass accumulation and root system under drought stress. Physiological and biochemical analyses demonstrated that primed seedlings existed significantly higher values in <i>P</i><sub><i>n</i></sub>, <i>G</i><sub><i>s</i></sub>, <i>T</i><sub>r</sub>, <i>F</i><sub><i>v</i></sub>/<i>F</i><sub><i>m</i></sub>, <i>F</i><sub><i>v</i></sub>′/<i>F</i><sub><i>m</i></sub>′, <i>Φ</i><sub>PSII</sub> and NPQ. Additionally, increased contents of total chlorophyll, Pro, TSS, and RWC were observed, along with enhanced activities of antioxidant enzymes, such as SOD, CAT, APX, and POD. In contrast, concentrations of H<sub>2</sub>O<sub>2</sub>, O<sub>2</sub><sup>–</sup>, MDA, and REC were significantly reduced. Principal component analysis (PCA) indicated that PBP alleviated drought-induced damage primarily through enhancing antioxidant capacity and osmotic adjustment. Transcriptome analysis showed that PBP triggered an active adaptation mechanism against drought, as evidenced by the significant enrichment of DEGs involved in “ion transport”, “glyoxysome”, and “MAPK signaling pathway”. Correlation analysis revealed that expression levels of genes enriched in aforementioned terms were, on the whole, significantly positively correlated with both enzyme activities and levels of osmotic regulatory substances. Overall, this study unveils a novel application for PBP, establishes a theoretical basis for its use in improving drought resistance in wheat, and provides an innovative strategy for boosting wheat production in arid and semi-arid regions.</p>

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Exogenous porcine blood polypeptide alleviates drought damage in wheat

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月7日

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  • Ximei Li,
  • Yiming Yuan,
  • Yanan Wang,
  • Meitian Dong,
  • Yanling Ma,
  • Yong Shen,
  • Yang Guo,
  • Weiwei Guo,
  • Huifang Wang,
  • Hengyu Yan,
  • Meng Han,
  • Nataliia Golub,
  • Yumei Zhang

摘要

Previous studies have demonstrated that porcine blood polypeptide (PBP) could mitigate plant damage under adverse conditions. This study was conducted to systematically investigate the possible role of PBP in enhancing drought resistance in wheat through comprehensive physiological and biochemical analyses, as well as transcriptomic analysis. Morphological observations revealed that PBP-primed seedlings exhibited improved growth, biomass accumulation and root system under drought stress. Physiological and biochemical analyses demonstrated that primed seedlings existed significantly higher values in Pn, Gs, Tr, Fv/Fm, Fv′/Fm′, ΦPSII and NPQ. Additionally, increased contents of total chlorophyll, Pro, TSS, and RWC were observed, along with enhanced activities of antioxidant enzymes, such as SOD, CAT, APX, and POD. In contrast, concentrations of H2O2, O2–, MDA, and REC were significantly reduced. Principal component analysis (PCA) indicated that PBP alleviated drought-induced damage primarily through enhancing antioxidant capacity and osmotic adjustment. Transcriptome analysis showed that PBP triggered an active adaptation mechanism against drought, as evidenced by the significant enrichment of DEGs involved in “ion transport”, “glyoxysome”, and “MAPK signaling pathway”. Correlation analysis revealed that expression levels of genes enriched in aforementioned terms were, on the whole, significantly positively correlated with both enzyme activities and levels of osmotic regulatory substances. Overall, this study unveils a novel application for PBP, establishes a theoretical basis for its use in improving drought resistance in wheat, and provides an innovative strategy for boosting wheat production in arid and semi-arid regions.