Mortierella elongata's roles in organic agriculture and crop growth promotion in a mineral soil
Mortierella elongata's roles in organic agriculture and crop growth promotion in a mineral soil
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DOI：
10.1002/ldr.2965
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发表时间：
2018-06-01
影响因子：
4.7
通讯作者：
Li, Wei
中科院分区：
文献类型：
--
作者：
Li, Fang;Chen, Lin;Li, Wei
添加有机添加物大大有助于改善土壤质量，防止土壤退化。然而，目前对优势真菌菌株对有机肥的反应及其在养分转化和作物生长促进中的作用还知之甚少。在这里，土壤和玉米根收集了35年的田间试验与堆肥豆粕处理。利用内转录间隔区基因的深度扩增子序列分析了土壤、根际和内围真菌群落。总体而言，土壤真菌群落以子囊菌门、担子菌门和接合菌门为主。有机添加物改变了土壤真菌群落组成，被孢霉属、镰刀菌属和毛壳菌属在土壤和根际土壤中的相对丰度显著增加。长被孢霉是最成功的真菌响应有机投入所看到的激增的丰度。M. elongata表明M. elongata具有降解一系列有毒有机物的功能能力，从而改善土壤健康。此外，M。elongata的能力，组成柠檬酸盐的物质，可以有助于长期稳定的SOM池被证实。这些结果表明M. elongata可能是土壤固碳的机制。接种M.结果表明，延长草施入土壤后，植株吲哚乙酸含量和生物量均显著增加。土壤磷酸酶和β-葡萄糖苷酶活性也得到提高。我们的研究表明M.长穗醋栗可以防止土壤退化，改善土壤健康，并刺激植物生长激素的产生。
The addition of organic amendments contributes substantially to improvements in soil quality and prevents soil degradation. However, very little is known about the responses of dominant fungal strains to organic fertilizers or their functions in the nutrient transformations and crop growth promotion. Here, soils and maize roots were collected from a 35-year field experiment treated with composted soybean cake. The fungal communities in the bulk soil, rhizosphere, and endosphere were analyzed by deep amplicon sequencing of the internal transcribed spacer region gene. Overall, the soil fungal community was dominated by the phyla Ascomycota, Basidiomycota, and Zygomycota. Organic amendments changed the fungal community composition, with significant increase in the relative abundances of Mortierella, Fusarium, and Chaetomiceae in the bulk and rhizosphere soils. Mortierella elongata was the most successful fungi responding to organic inputs as seen by the surge in abundance. Genome characteristics of M. elongata indicated that M. elongata possessed the functional capacity to degrade a range of toxic organics, and thereby improve soil health. Furthermore, M. elongata's capacity to compose recalcitrant substances that can contribute to pools of long-term stable SOM was confirmed. These findings suggest that M. elongata may be mechanistic in sequestering C in soil. Inoculations of M. elongata into soil significantly increased the levels of plant indole acetic acid and plant biomass. Soil phosphatase and beta-glucosidase activities were also improved. Our study suggests that M. elongata can defend against soil degradation, improve soil health, and stimulate production of plant growth hormones.