外源通过调节聚胺和氨酸代谢来提高马卢斯罗布斯塔 (Malus Robusta) 的耐受性
Wanying Xie1, Ruoxuan Song1, Jie Shen1
1School of Horticulture, Ludong University, Yantai, Shandong Province, China.
Physiologia plantarum
|February 2, 2026
概括
(Se) 应用通过降低的积累,降低了Malus robusta幼苗的 (Mn) 毒性. 这改善了植物生理学和抗氧化剂平衡,突出了SeSe.
科学领域:
- 植物生理学 植物生理学
- 环境毒理学环境毒理学
- 生物化学 生物化学
背景情况:
- 过量的 (Mn) 对植物有毒,限制了农业生产力.
- 已知 (Se) 可减轻重金属压力,但其对Mn毒性的作用尚未得到充分研究.
研究的目的:
- 为了研究外源 (Se) 对 (Mn) 毒性的影响,在Malus robusta幼苗中.
- 阐明Se介导的压力缓解背后的机制,重点关注积累,生理反应和代谢途径.
主要方法:
- 在0.5mM Mn的毒性条件下,Malus robusta的苗木被用化 (0.5μM) 处理.
- 评估了Mn积累,光合作用色素,叶绿素光 (Fv/fm, ΦPSII),活性氧物种 (ROS) 生产和抗氧化酶活动.
- 分析了多胺代谢 (普特瑞辛,精子胺,精子胺),林生物合成,以及关键基因 (ODC,ADC,OAT) 的表达/活性.
主要成果:
- 显著降低了的积累,并减轻了的毒性,增强了根生长和光合作用参数.
- 治疗通过减少ROS和激活抗氧化系统来维持抗氧化剂平衡.
- 通过降低氨酸 (Put) 和增加 (精子胺+精子胺) /氨酸比率来调节聚胺代谢,与下调的ODC和ADC相关联. 由于OAT抑制,氨酸含量也减少了.
结论:
- 通过调节聚和代谢来增强马卢斯·罗布斯塔 (Malus robusta) 对压力的耐受性.
- 这项研究揭示了通过Se应用和代谢途径调节来减少植物中Mn毒性的潜在机制.
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