和甲基斯酸盐通过提高叶子光化学性能,提高了甜菜对高压力的耐受性
Jialu Huo1, Xiaoyu Zhao1, Baiquan Song1
1Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & National Sugar Crops Improvement Center & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region &Sugar Beet Engineering Research Center Heilongjiang Province & College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin, 150080, China.
Journal of environmental management
|September 7, 2024
概括
高压力会损害甜菜的生长. 用硫酸 (ZnSO4) 或甲基斯酸 (MeJA) 喷叶片单独提高了植物的耐受性和光合作用性能,而联合喷显示的益处较小.
科学领域:
- 农业科学 农业科学
- 植物生理学 植物生理学
- 环境压力生物学
背景情况:
- 高 (B) 压力是一个显著的非生物因素,降低了土壤的肥力,并抑制了全球的植物生长.
- 甜菜是一种热爱的作物,需要加强对高B环境的耐受性机制.
- 目前对改善甜菜中高B压力耐受性的方法和机制的了解有限.
研究的目的:
- 研究叶状硫酸盐 (ZnSO4) 和甲基斯酸盐 (MeJA) 在高B压力下对甜菜的作用.
- 评估对生长参数,耐压力和光合作用性能的影响.
- 为了确定单个和ZnSO4和MeJA联合应用的疗效.
主要方法:
- 甜菜植物遭受了高B压力.
- 单独和组合使用的ZnSO4和MeJA进行了叶子应用.
- 测量包括生长参数,耐受性指数,净光合作用率 (Pn) 和叶绿素光度 (Fv/Fm,PIABS).
主要成果:
- 高B压力抑制了光合作用性能 (Pn减少了11.33%) 并增加了耐受性指数 (25.30%).
- 单个ZnSO4和MeJA的应用分别提高了PN (9.22%和4.49%) 和耐受性指数 (15.33%和8.21%).
- 联合喷涂的改善比单个应用的改善要小,尽管所有处理都提高了光化学效率 (Fv/Fm,PIABS) 并改善了PSII中的光能处理.
结论:
- 叶子ZnSO4和MeJA有效地减轻高B压力,促进甜菜的生长.
- 单个应用ZnSO4或MeJA比它们的联合喷更有利于高B应力减轻.
- 这些发现为改善在高B条件下种植甜菜提供了基础.
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