| 镧对丛枝菌根发育的影响 |
| Effects of lanthanum element on the development of arbuscular mycorrhizas |
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| 中文关键词:镧元素，丛枝菌根真菌，侵染，孢子，生物量 |
| 英文关键词:lanthanum, arbuscular mycorrhizal fungus, colonization, spore, biomass |
| 基金项目:国家自然学基金（No. 31240085）；山东省科技发展计划（No. 2013GNC11014） |
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| 中文摘要: |
| 稀土元素在一定剂量下具有增加作物产量、改善品质的作用，为了评价镧元素对丛枝菌根（arbuscular mycorrhiza，AM）真菌侵染和产孢的影响，研究于温室盆栽条件下，以0、0.001、0.005、0.025、0.125、0.625mmol/L氯化镧溶液分别浇灌接种与不接种AM真菌Glomus mossea的白车轴草Trifolium repens，每次浇灌200mL，共6次，定期测定各处理白车轴草生物量、植株氮、磷和钾含量、AM产孢和侵染率等。结果表明，无论接种与否，镧处理均显著增加了白车轴草生物量、植株氮、磷和钾含量，接种AM真菌的白车轴草生物量和养分含量均显著优于未接种对照。随着镧浓度的增高，接种AM真菌植株的氮、磷和钾含量先上升再下降，镧浓度为0.005mmol/L时氮、磷和钾吸收量最高，分别为68.3、9.1、106.0mg/g。不同浓度镧对根系侵染率及孢子密度产生不同影响，随着镧元素浓度升高，侵染率及孢子密度呈现先升高后降低的趋势；镧浓度为0.005mmol/L时，侵染率最高（82%），孢子密度最大（8.03个/g）。 |
| 英文摘要: |
| It is well documented that rare earth elements in certain doses can increase production and quality of crops. The purpose of this study was to evaluate the effect of lanthanum on arbuscular mycorrhizal (AM) infection and sporulation on Trifolium repens. Potted plants inoculated with or without AM fungus Glomus mossea in a greenhouse conditions were irrigated with a nutrient solution containing 0, 0.001, 0.005, 0.025, 0.125, or 0.625mmol/L of lanthanum chloride. Each treatment was set up with six repeated supplies (200mL each). Clover plant biomass, plant nitrogen, phosphorus and potassium content, AM sporulation and colonization percentage were determined. Plants treated with lanthanum significantly increased their biomass, as well as nitrogen, phosphorus and potassium content, regardless of AM fungus infection. Inoculation with G. mossea significantly increased the growth of Trifolium repens as compared with the non-inoculated plants. With the increase of lanthanum concentrations, N, P and K content in the inoculated plants initially increased and then decreased. The highest content of N, P and K were 68.3、9.1 and 106.0mg/g, respectively when the plants treated with 0.005mmol/L lanthanum chloride. There were different effects on root colonization percentage and the spore density when the plants irrigated with different concentrations of lanthanum. With the increase of lanthanum concentration, colonization percentage and spore density initially increased and then decreased. The highest colonization percentage and spore density were 82% and 8.03spores/g respectively when the plants treated with 0.005mmol/L lanthanum chloride. It is concluded that adding appropriate amount of lanthanum can enhance plant growth, and also improve sporulation of AM fungus. |
| 韩亚楠,陈可,师进生,刘润进,李敏. 镧对丛枝菌根发育的影响[J]. 菌物学报, 2014, 33(4): 847-857 |
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