菌根细菌对盐的耐受性及其对番茄植物种子发芽和生长能力的影响
Mustafa Akbaba1, Eren Özden2,3
1Plant Protection, Faculty of Agriculture, Igdir University, Igdir, Turkey. mustafa.akbaba@outlook.com.
概括
植物内生根细菌可以帮助番茄植物在盐土中更好地生长. 这些有益的微生物促进植物生长,并在盐水条件下改善发芽和幼苗发育.
科学领域:
- 农业科学 农业科学
- 微生物学 微生物学
- 植物科学 植物科学
背景情况:
- 盐度是一个主要的非生物压力,限制了全球的作物生产率,特别影响像西红这样的中等耐药作物.
- 环保解决方案,如内生菌根细菌 (ERB),对于回收盐土和提高作物产量至关重要.
- 内生菌菌殖民植物根,提供诸如减轻压力和促进生长等好处.
研究的目的:
- 从番茄植物中分离和表征耐盐的内菌根细菌.
- 评估这些内菌的植物生长促进 (PGP) 特性.
- 评估ERB治疗在盐水条件下对番茄发芽和幼苗活力的有效性.
主要方法:
- 从盐压缩的番茄根中分离内菌的细菌.
- 细菌对各种NaCl度 (0-0.8M) 的耐受性测定.
- 对PGP特征的测定: siderophore,酸盐溶解,IAA生产和固定.
- 在标准和盐水实验室条件下评估ERB对番茄种子发芽和幼苗活力 (生命力,长度,重量) 的影响.
主要成果:
- 14.8%的分离物体表现出高盐分耐受性;18.5%的分离物体表现出高度敏感性.
- ERB分离物表现出显著的PGP特征: siderophore (4-30毫米),酸盐溶解 (6-16毫米) 和IAA产量 (24.9-171.6微克/毫升).
- 在55.7%的隔离物中观察到高固定潜力.
- 在标准条件和盐水条件下,ERB处理改善了种子活力,低细胞和根长度,苗木新鲜体重,并加速了番茄的发芽.
结论:
- 耐盐的内菌根细菌具有多样化的植物生长促进能力.
- 应用ERB是一种有前途的策略,可以在盐水环境中提高番茄的弹性和生产力.
- 这些发现支持使用有益的微生物作为农业面临度挑战的可持续方法.
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