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      2. 云南省綠春縣胡椒病害的發生與叢枝菌根真菌的調查
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        作者:
        作者單位:

        1.西南林業大學;2.西南地區生物多樣性保育國家林業局重點實驗室

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        基金項目:

        云南省高校林下生物資源保護與利用科技創新團隊(2018KF02);國家自然科學基金(31260175,31360198,31560207);云南省高校干熱河谷植被恢復創新團隊,國家自然科學基金項目(面上項目,重點項目,重大項目)


        The occurrence of pepper disease and investigation of arbuscular mycorrhizal fungi in Lvchun County, Yunnan Province
        Author:
        Affiliation:

        1.Key Laboratory for Forest Biotechnology in Universities of Yunnan Province,Southwest Forestry University;2.Key Laboratory for Biodiversity Conservation in Southwest ChinaSof StateSForestry Administration,Kunming Yunnan

        Fund Project:

        云南省高校林下生物資源保護與利用科技創新團隊(項目編號2018KF02);國家自然科學基金項目(31860208,31360198,31560207);云南省高校干熱河谷植被恢復創新團隊(218033);

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          摘要:

          采集云南省紅河州綠春縣騎馬壩鄉的胡椒種植地的胡椒根系及土壤樣品并進行胡椒瘟病的調查計算胡椒瘟病的發病率與病情指數,并利用濕篩沉淀法 、植株根部染色等方法對所選樣地的胡椒根際及根部周圍的叢枝菌根真菌的孢子密度、豐富度、多樣性指數及菌根侵染率進行調查和計算,再用SPSS軟件進行最后的數據分析。結果顯示,當菌根侵染率最高為62.5%時,孢子的密度也最高,達到11.725個/g,胡椒瘟病的發病率和病情指數最低,分別為20%和9;當菌根侵染率和孢子的密度最低為11%和2.475個/g時,胡椒瘟病的發病率和病情指數最高,分別為80%和53.5;相關性分析結果表明叢枝菌根真菌的孢子密度、豐富度和菌根侵染率與胡椒瘟病發病率和病情指數呈顯著負相關關系(p<0.05),即叢枝菌根真菌孢子的豐富度及孢子密度越大,菌根侵染率越高,胡椒瘟病的發病率就越低,病情指數也就越小。由此可看出,胡椒根系土壤中叢枝菌根真菌的存在能增強胡椒的抗病性,減少病害的發生。

          Abstract:

          The pepper root system and soil samples were collected from the pepper planting area in Qimaba Township, Lvchun County, Honghe Prefecture, Yunnan Province. To investigate pepper phytophthora root rot and calculate its incidence and disease index, The spore density, richness, diversity index and mycorrhizal infection rate of arbuscular mycorrhizal fungi(AMF) in the rhizosphere and around roots of pepper were investigated by wet-screen precipitation method and Plant root staining. Then the final data were analyzed by SPSS software. The results showed that when the mycorrhizal infection rate was 62.5%, the spore density was also the highest, reaching 11.725 spores/ g, the incidence and disease index of pepper phytophthora root rot were the lowest (20% and 9, respectively). when mycorrhizal infection rate and spore density were the lowest 11% and 2.475 spores/ g, the incidence and disease index of pepper phytophthora root rot were the highest at 80% and 53.5, respectively. The results of the correlation analysis showed that the spore density, richness and mycorrhizal infection rate of the AMF were negatively correlated with the incidence and the disease index of pepper phytophthora root rot. That is, the higher the spore richness and spore density of AMF, the higher the mycorrhiza infection rate, the lower the incidence of pepper phytophthora root rot and the smaller the disease index. It follows that the existence of AMF in pepper root soil can enhance the disease resistance of pepper and reduce the occurrence of diseases.

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        • 收稿日期:2019-10-11
        • 最后修改日期:2020-07-26
        • 錄用日期:2020-08-10
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