Effects of AM fungi on growth and nutritional contents of Salvia miltiorrhiza Bge. under drought stress
Effects of AM fungi on growth and nutritional contents of Salvia miltiorrhiza Bge. under drought stress
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发表时间：
2011
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通讯作者：
He Xue-li
中科院分区：
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作者：
He Xue-li
25%浓度下AM真菌对丹参生长及营养成分的影响，土壤相对含水量为50%和75%的未消毒土壤盆栽试验（土∶沙=2∶1）结果表明，在不同土壤含水量条件下，AM真菌对丹参的生长有显著影响，其菌根定殖率和寄主植物生物量显著高于对照在不同土壤水分条件下，接种AM真菌促进了丹参AM真菌的定殖。接种AM真菌显著提高了叶片生物量、可溶性糖、叶绿素和根系中的全P、全N和丹参酮含量，显著降低了叶片中的全N含量;土壤相对含水量为25%和50%时，叶片中的可溶性蛋白和脯氨酸含量显著降低;土壤相对含水量为25%时，叶片和根系中的总黄酮含量显著降低，干旱胁迫和AM真菌对叶片中可溶性糖、可溶性蛋白、脯氨酸、全N、全P、全N、脯氨酸、丹参酮和总黄酮的含量，接种量在50%以下时效果最好AM真菌增强菌根植物抗旱性的机理可能是AM真菌菌丝促进了菌根植物对土壤水分和矿物质的吸收，提高了菌根植物的生理代谢活性，AM真菌能促进丹参的生长。
Effects of AM fungi on growth and nutritional contents of Salvia miltiorrhiza Bge.under 25%,50% and 75% soil relative water content in pot culture with unsterilized soil(soil∶sand=2∶1) as growth substrate were studied.The results showed that AM fungi had significant influences on the growth of Salvia miltiorrhiza Bge.under different water content in soil.The mycorrhizal colonization rate and biomass of host plants significantly decreased under drought stress.Under different soil water conditions,inoculation with AM fungi promoted the AM fungal colonization of Salvia miltiorrhiza Bge..Inoculating AM fungi significantly increased the biomass,soluble sugar,chlorophyll in leaves and total P,total N and tanshinone contents in roots,and significantly decreased total N contents in leaves.The soluble protein and proline contents in leaves significantly decreased under 25% and 50% soil relative water content.The total flavonoids contents in leaves and roots significantly decreased under 25% soil relative water content,while significantly increased under 50% and 75% soil relative water content by AM fungal inoculation.Drought stress and AM had significant interaction effect on the contents of soluble sugar,soluble protein,proline and total N in leaves,total P,tanshinone and total flavonoid in leaves and roots.The best inoculation effect occurs under 50% soil relative water content.The mechanism of AM fungi strengthening drought resistance of mycorrhizal plant could be that AM fungal hypha contributed to soil water and minerals uptake in mycorrhizal plant,and AM fungi improved physiological metabolic activity of mycorrhizal plant.AM fungi could promote the growth of Salvia miltiorrhiza Bge..