丛枝菌根真菌对盐碱化土壤中玉米生长的影响

Effects of arbuscular mycorrhizal fungi on maize growth in saline-alkali soil

基于土壤盐碱化破坏了土壤结构、影响作物生长和降低了土地生产力等问题,通过向植物根区强化接种丛枝菌根真菌,探讨其对植物生长生理的影响。选取滨海轻度盐碱化土壤为供试基质,玉米为供试植物,根内球囊酶为供试菌株,通过室内盆栽试验,研究接种根内球囊酶对玉米叶片脯氨酸、抗性酶等抗逆性指标的影响。结果表明,强化接种根内球囊酶提高了玉米根系侵染率,增强了玉米的抗逆性,对照组处理玉米叶片中脯氨酸、可溶性糖分别比接菌处理高出22.7%、18.3%,接菌组玉米叶片抗性酶活性平均要比对照组高出10%。总体而言,盐胁迫下根内球囊酶与玉米保持较高的共生关系,接种根内球囊酶缓解了土壤盐碱化对玉米生长造成的不利影响,且根内球囊酶适合在盐碱化土壤中推广应用。

Soil salinization will destroy the soil structure,affect crop growth,and reduce soil fertility.Thus,this study aimed to explore the influence of arbuscular mycorrhizal fungi(AMF)on plant growth and physiology by inoculating AMF into plant roots.The effects of inoculated Glomus intraradices on the resistance indexes of maize leaves,such as proline and resistant enzymes,were determined based on indoor pot experiments by selecting coastal mild saline-alkali soil as the test medium and taking maize and G.intraradices as the test plant and the test strain,respectively.Results showed that the enhanced inoculation of G.intraradices increased the root colonization rate and improved the stress resistance of maize.Proline and soluble sugar in control maize leaves were 22.7%and 18.3%higher than those in the inoculated group,respectively.Moreover,the activity of resistance enzyme in maize leaves in the inoculated group was 10%higher than that in the control group.The symbiotic relationship between G.intraradices and maize under salt stress was relatively high.Inoculation of G.intraradices alleviates the adverse effects of soil salinization on maize growth,and G.intraradices is suitable for application in saline-alkali soil.