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Updated: Jun 30, 2025

A Rapid and Efficient Method for Assessing Pathogenicity of Ustilago maydis on Maize and Teosinte Lines

A Rapid and Efficient Method for Assessing Pathogenicity of Ustilago maydis on Maize and Teosinte Lines

Published on: January 3, 2014

玉米中介导的抵抗力对梅氏叶病的生理和生化方面

Luis Felipe Lata-Tenesaca¹, Marcos José Barbosa Oliveira¹, Aline Vieira Barros¹

¹Departamento de Fitopatologia, Laboratório da Interação Planta-Patógeno, Universidade Federal de Viçosa, Viçosa, Minas Gerais 36570-900, Brazil.

Plants (Basel, Switzerland)

|March 18, 2024

概括

(Si) 补充剂通过改善防御酶活性和光合作用健康来增强玉米对梅氏叶病 (MLB) 的抵抗力. 叶状含量较高的植物显示疾病严重程度降低,整体植物功能更好.

科学领域:

植物病理学植物病理学
植物生理学植物生理学
农业科学农业科学

背景情况:

梅迪斯叶病 (MLB) 是由*Bipolaris maydis*引起的,可显著降低玉米产量.
已知 (Si) 在植物防御机制中起作用.
对玉米对MLB耐药性的特定影响需要进一步调查.

研究的目的:

为了评估增加叶片度增加增加玉米对梅迪斯叶虫害的耐药性,这一假设.
分析对受*Bipolaris maydis*感染的玉米植物的光合作用装置和防御机制的影响.

主要方法:

玉米植物被分为两组:用 (+Si; 2 mM) 供应的和没有 (-Si; 0 mM) 的.
两组都被挑战了"双极性病可能"或没有受到挑战.
评估的关键参数包括叶子的气体交换,叶绿素的光,光合作用色素,以及防御和抗氧化酶的活性.

主要成果:

叶片 (+Si) 含量较高的植物表现出较少的MLB症状,包括较小的病变和较低的疾病严重程度.
+Si植物的氧化应激较少,由较低的甲,过氧化和超氧化基离子水平表明.
与受感染的-Si植物相比,受感染的+Si植物保持了较高的净二氧化碳同化率,口腔导电率和透气率,以及保存的叶绿素和胡卜素水平.
关键的防御酶 (胆酶,β-1,3-葡萄糖酶,PAL,PPO,POD,LOX) 和抗氧化酶 (APX,CAT,SOD,GR) 的活性在受感染的+Si植物中显著增加.

结论:

补充对于增强玉米对Maydis叶病的耐药性至关重要.
增加的叶状增强了植物的防御反应,并加强了抗氧化代谢.
有助于在MLB压力下保存玉米植物的光合作用装置,有助于提高作物弹性和产量潜力.

关键词:

进行X射线微分析.抗氧化酶是一种抗氧化酶.防御酶防御酶防御酶叶绿素的一个光.东道主防御反应的反应光合作用光合作用.

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