LU Jian-cong,XU Yan-li,SONG Jie.Effect of Soil Disturbance to the Biological Control of Fermentation Filtrate of Parasitic Fungi on Soybean Cyst Nematode in Glasshouse[J].Soybean Science,2016,35(01):106-111.[doi:10.11861/j.issn.1000-9841.2016.01.0106]
土壤扰动对寄生真菌代谢物温室防治大豆胞囊线虫的影响
- Title:
- Effect of Soil Disturbance to the Biological Control of Fermentation Filtrate of Parasitic Fungi on Soybean Cyst Nematode in Glasshouse
- 文献标志码:
- A
- 摘要:
- 大豆胞囊线虫是影响大豆产量的主要限制性病原。大豆胞囊线虫的自然抑制性是存在的,并且日益受到关注,然而在胞囊线虫生态抑制方面的研究却很少。研究在温室条件下接种真菌后以扰动(土壤过0.5 cm孔筛)为土壤微环境并与无干扰对比,用厚垣轮枝菌(Pochonia chlamydosporium)、镰孢菌(Fusarium spp.)和淡紫拟青霉(Paecilomyces lilacinus)的混合代谢物分别对大豆胞囊线虫进行处理,探讨其对大豆胞囊线虫温室盆栽防效的影响。在接种二龄幼虫(J2)35 d后,对大豆胞囊线虫密度调查结果表明:土壤扰动条件下,接种混合代谢物与不接种混合代谢物相比,雌虫数量降低20.0%~35.9%,胞囊数量降低18.3%~35.0%,卵量降低21.5%~38.5%,根内J2数量降低14.6%~35.3%,其中以4号混合代谢物扰动对大豆胞囊线虫密度降低作用显著;土壤不扰动下,接种混合代谢物与不接种混合代谢物相比,雌虫密度降低19.5%~32.7%,胞囊密度降低19.5%~35.2%,卵量降低21.1%~37.8%,J2数量降低8.0%~27.6%,仅雌虫和根内J2数量与不接种混合代谢物对照差异显著,菌株之间差异不显著。对大豆植株生长发育调查结果表明:扰动可能会促进植株生长、植株鲜重增加,但与不扰动差异不显著。试验证明:扰动对盆栽大豆胞囊线虫雌虫、胞囊、卵和J2的密度有一定的影响,扰动有增强寄生真菌代谢物对胞囊线虫温室防效效果的趋势,对降低大豆胞囊线虫密度起到积极作用。真菌对大豆胞囊线虫生长发育具有抑制作用,土壤扰动干扰和真菌代谢物的配合应用会降低土壤中胞囊线虫的密度,并影响真菌在土壤中的生防效果。
- Abstract:
- Soybean cyst nematode (SCN), Heterodera glycines, remains a major yield-limiting pathogen of soybean. Natural suppression of SCN exists and becomes increasingly attractive. However, ecological mechanism leading to the suppressive state of cyst nematode is rarely studied.The glasshouse experiments were performed to determine the effects of soil disturbance and fermentation filtrate of parasitic fungal on soybean cyst nematode.Soil disturbance was simulated by soil passing through a sieve(aperture 0.5 cm) and compared with no-disturbance (non-sieve) treatment. Different fermentation filtrate of parasitic fungi were mixed by applying.Paecilomyces lilacinus, Fusarium spp. and Pochonia chlamydosporium.Density of SCN were investigated 35 days after soybeans planted in each pot- It showed that the SCN female, density of cyst, egg and J2 were significantly reduced with 20.0%-35.9%, 18.3%-35.0%, 21.5%-38.5% and 14.6%-35.3% respectively in the treatment of soil disturbance with mixed fermentation filtrate compared with soil disturbance without mixed fermentation, and the disturbance of the 4th mixed fermentation filtrate on soybean cyst nematode density was the most significantly. Without soil disturbance, applying mixed fermentation filtrate could reduce the SCN female, density of cyst, egg and J2 by 19.5%-32.7%, 19.5%-35.2%, 21.1%-37.8% and 8.0%-27.6% respectively.Compared with control treatments, there were no significant difference in the population of SCN female, when J2 treated with different mixed fermentation filtrate. This study also showed that soil disturbance could stimulate the growth of soybean, and increase the fresh weight of soybean plants, but there were no significant difference between those without disturbance.These results indicated that mixed fermentation filtrate could inhibit the development of the SCN female, density of cyst, egg and J2.Soil disturbance could promote preventive effectiveness of fungus metabolism in glasshouse and play an active role on reducing the population density of SCN. Fungi inhibit the growth and development of SCN, coordination application of soil disturbance interference and fungal metabolites might induce the population density of SCN and affect its biological control efficiency in soil.
参考文献/References:
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备注/Memo
基金项目:国家自然科学基金(39071900)。