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<p>L-type lectin receptor-like kinases (LecRKs) are a large family of membrane-anchored receptor kinases. L-type LecRKs play key roles in plant development and disease resistance, but their functions in abiotic stress responses are poorly understood. Soil salinization is an escalating problem that severely affects cotton (Gossypium hirsutum), a crucial cash crop for fiber, oil, and protein production. Therefore, it is urgent to improve salt tolerance. In this study, we systematically and comprehensively characterized L-type LecRKs in upland cotton. We identified 93 L-type <i>LecRKs</i> in the cotton genome. Phylogenetic analysis revealed that LecRKs were expanded in cotton in a pattern different from that in Arabidopsis. The expression patterns of cotton L-type LecRKs were tissue- and stress-specific as revealed by heatmap analysis. Interestingly, a pair of <i>LecR</i>K homeologs from subgroup VI were induced by salt treatment in both roots and leaves. Silencing <i>GhLecRK-VI</i> significantly impaired salt tolerance and triggered overproduction of reactive oxygen species in leaves, demonstrating its critical role in the cotton salt stress response.” Our results provide the first systematic characterization of the <i>L-type LecRK</i> gene family in cotton and reveal the diversity of <i>LecRKs</i> in Gossypium. Furthermore, our findings deepen the understanding of the roles of <i>LecRKs</i> in salt tolerance and will be helpful for breeding salt-tolerant cotton and other plants.</p>

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Identification of L-type LecRK Genes and Functional Characterization of GhLecRK-VIa and GhLecRK-VId in Salt Resistance in Upland Cotton

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Jiangyan Qiu,
  • kang Huang,
  • Jun Liu,
  • Xiyan Yang,
  • Wenming Lian,
  • Yanqin Wang

摘要

L-type lectin receptor-like kinases (LecRKs) are a large family of membrane-anchored receptor kinases. L-type LecRKs play key roles in plant development and disease resistance, but their functions in abiotic stress responses are poorly understood. Soil salinization is an escalating problem that severely affects cotton (Gossypium hirsutum), a crucial cash crop for fiber, oil, and protein production. Therefore, it is urgent to improve salt tolerance. In this study, we systematically and comprehensively characterized L-type LecRKs in upland cotton. We identified 93 L-type LecRKs in the cotton genome. Phylogenetic analysis revealed that LecRKs were expanded in cotton in a pattern different from that in Arabidopsis. The expression patterns of cotton L-type LecRKs were tissue- and stress-specific as revealed by heatmap analysis. Interestingly, a pair of LecRK homeologs from subgroup VI were induced by salt treatment in both roots and leaves. Silencing GhLecRK-VI significantly impaired salt tolerance and triggered overproduction of reactive oxygen species in leaves, demonstrating its critical role in the cotton salt stress response.” Our results provide the first systematic characterization of the L-type LecRK gene family in cotton and reveal the diversity of LecRKs in Gossypium. Furthermore, our findings deepen the understanding of the roles of LecRKs in salt tolerance and will be helpful for breeding salt-tolerant cotton and other plants.