%0 Journal Article
%A BAI Shu-Lan
%A HAO Long-Fei
%A HAO Wen-Ying
%A MU Ya-Nan
%A NING Xin-Zhe
%A YAN Hai-Xia
%A ZHAO Min
%T Screening of Excellent Ectomycorrhizal Fungi-tree for Drought Resistant with <i>Pinus sylvestris</i> var. <i>mongolica</i>
%D 2020
%R 10.7525/j.issn.1673-5102.2020.01.018
%J Bulletin of Botanical Research
%P 133-140
%V 40
%N 1
%X In order to screening the excellent ectomycorrhizal fungi-tree for drought resistant with <i>Pinus sylvestris</i> var. <i>mongolica</i> in Honghuaerji. Five dominant ectomycorrhizal fungi strains in <i>P.sylvestris</i> var. <i>mongolica</i> forest were used as inoculants to artificially inoculate five-month-old seedlings of <i>P.sylvestris</i> var. <i>mongolica</i>. The mycorrhizal infection and morphology were observed after eight months, and the mycorrhizal seedlings growth and physiological and biochemical indexes were detected under non-drought stress and drought stress conditions. The results show that five native strains could successfully infect <i>P.sylvestris</i> var. <i>mongolica</i> and form typical ectomycorrhiza. All growth indexes of mycorrhizal seedlings were significantly higher than CK under drought stress condition(<i>P</i><0.05). It was the highest colonization rate, height, aboveground biomass, underground biomass, and root-shoot rate that seedlings were inoculated with <i>Suillus bovinus</i>. Ectomycorrhizal symbionts can improve drought tolerance of <i>P.sylvestris</i> var. <i>mongolica</i> by increasing SOD and POD activities and reducing MDA content. The wilting time of all inoculated seedlings was delayed compared with the control under drought stress. The longest delay was the inoculation of <i>S.bovinus</i>, which was 96.3 h later than the control. In addition, inoculation treatment could significantly prolong the critical lethal time of the host, especially the inoculation of <i>S.bovinus</i> could prolong 113.8 h. Thererfore, <i>S.bovinus</i> and <i>P.sylvestris</i> var. <i>mongolica</i> were an ideal combination of drought-resistant ectomycorrhizal fungi-tree.
%U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2020.01.018