甲基斯酸盐调节了糖在Diatraea saccharalis (Fabricius, 1794) 感染下非酶性抗氧化剂防御
Júlia Karoline Rodrigues das Mercês1, Eduarda Gonçalves Reis1, Milton Garcia Costa1
1School of Agricultural and Veterinary Sciences, Department of Biology, São Paulo State University (Unesp), Jaboticabal, 14884900, Brazil.
BMC plant biology
|December 18, 2025
概括
甲基斯酸盐 (MeJA) 启动了甘对抗甘的防御能力. 不同的MeJA剂量增强抗氧化反应,减少压力和非压力植物的损害,以实现综合性害虫管理.
科学领域:
- 植物科学 植物科学
- 农业昆虫学 农业昆虫学
- 生物化学 生物化学
背景情况:
- 甘的生产力受到生物压力所限制,尤其是甘钻探者 (Diatraea saccharalis) 的草食.
- 昆虫草食会引发氧化应激,降低作物产量和质量.
- 使用甲基斯酸盐 (MeJA) 进行防护初始化,通过提高植物准备度,为杀虫剂提供了一个可持续的替代方案.
研究的目的:
- 评估外源MeJA应用如何影响甘的非酶性抗氧化剂防御.
- 调查MeJA在草食性压力 (D. saccharalis) 和非压力条件下的有效性.
- 为了确定MeJA对甘抗氧化系统的剂量依赖作用.
主要方法:
- 采用2x4因子方案的随机区块设计,使用压力 (感染者与非感染者) 和MeJA度 (0,0.25,0.5,1 mmol L-1) 作为因素.
- MeJA是在感染前七天应用的.
- 分析了叶子样本的脂质过氧化 (MDA),非酶性抗氧化剂 (醇,胡卜素,酸盐,谷氨),叶绿素和酸盐.
主要成果:
- 外源MeJA以剂量和上下文依赖的方式调节抗氧化防御.
- 在虫感染下,1毫摩尔L-1MeJA增加了和胡卜素,并减少了MDA.
- 在非压力植物中,0.25 mmol L-1 MeJA降低了MDA,并增加了醇,谷和氨酸.
结论:
- 采用MeJA可以增强甘对D. saccharalis草食菌的天然防御机制.
- 特定的MeJA度可以优化以加强抗氧化防御,减少氧化损伤.
- MeJA显示出作为甘采购者在综合性害虫防治战略中的补充工具的潜力.
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