Chenopodiaceae is one of the most important families in arid and saline environments. Several studies have observed the mycorrhizal structure in Chenopodiaceae plants(i.e., chenopods), but the mycorrhizal colonization...Chenopodiaceae is one of the most important families in arid and saline environments. Several studies have observed the mycorrhizal structure in Chenopodiaceae plants(i.e., chenopods), but the mycorrhizal colonization status of chenopods in saline habitats and the influencing factors are still not well understood. The mycorrhizal colonization of twenty chenopod species in three different saline habitats(a saline alkaline meadow in the Songnen Plain of northeastern China, a saline desert in the Junggar Basin of northwestern China, and a saline alpine meadow in the Tibetan Plateau of western China) and the chenopod-associated environmental factors(including soil moisture, soil available phosphorous(P) concentration, pH, and salt content) were analyzed. Our results showed that approximately 60% of the studied chenopods were colonized by arbuscular mycorrhizal(AM) fungi with a colonization percentage ranging from 5% to 33%. Structural analysis of mycorrhizal association indicated that vesicles were quite common, while arbuscules and hyphal coils were relatively rare. In addition, a positive correlation between mycorrhizal colonization rate and soil electrical conductivity(r=0.920, P<0.01) and two negative correlations of mycorrhizal colonization rates with soil moisture(r= –0.818, P<0.01) and the soil available P concentration(r= –0.876, P<0.01) confirmed that mycorrhizal colonization rate in the roots of chenopods was environment-dependent.展开更多
rhizospheric soil samples were collected from 45 wild plants distributed in Shandong Province during 1995～1997. More than forty species of AM fungi were isolated, and the effects of some soil factors on AM fungi were...rhizospheric soil samples were collected from 45 wild plants distributed in Shandong Province during 1995～1997. More than forty species of AM fungi were isolated, and the effects of some soil factors on AM fungi were also investigated. It was proved that soil conditions were important factors to the colonization, growth, and distribution of AM fungi. Spore numbers were highest in brown earth, and lowest in alkali saline soil. Glomus occurred in all types of soil. The occurrence frequency of Gigaspora and Scutellospora was much higher in brown earth. The distribution of AM fungi was also affected by soil pH. Glomus occurred in soil with a wide pH range. The greater of soil alkalinity, the more Glomus were found, while the greater of soil acidity, the more Acaulospora were isolated. Scutellospora occurred mostly in soil with pH of 6\^0～7\^0, and Gigaspora distributed mainly in acid soil.展开更多
基金supported by the National Natural Science Foundation of China (31300097, 31470405)the Foundation of Jilin Provincial Education Department and the China Scholarship Council (201506625023)
文摘Chenopodiaceae is one of the most important families in arid and saline environments. Several studies have observed the mycorrhizal structure in Chenopodiaceae plants(i.e., chenopods), but the mycorrhizal colonization status of chenopods in saline habitats and the influencing factors are still not well understood. The mycorrhizal colonization of twenty chenopod species in three different saline habitats(a saline alkaline meadow in the Songnen Plain of northeastern China, a saline desert in the Junggar Basin of northwestern China, and a saline alpine meadow in the Tibetan Plateau of western China) and the chenopod-associated environmental factors(including soil moisture, soil available phosphorous(P) concentration, pH, and salt content) were analyzed. Our results showed that approximately 60% of the studied chenopods were colonized by arbuscular mycorrhizal(AM) fungi with a colonization percentage ranging from 5% to 33%. Structural analysis of mycorrhizal association indicated that vesicles were quite common, while arbuscules and hyphal coils were relatively rare. In addition, a positive correlation between mycorrhizal colonization rate and soil electrical conductivity(r=0.920, P<0.01) and two negative correlations of mycorrhizal colonization rates with soil moisture(r= –0.818, P<0.01) and the soil available P concentration(r= –0.876, P<0.01) confirmed that mycorrhizal colonization rate in the roots of chenopods was environment-dependent.
文摘rhizospheric soil samples were collected from 45 wild plants distributed in Shandong Province during 1995～1997. More than forty species of AM fungi were isolated, and the effects of some soil factors on AM fungi were also investigated. It was proved that soil conditions were important factors to the colonization, growth, and distribution of AM fungi. Spore numbers were highest in brown earth, and lowest in alkali saline soil. Glomus occurred in all types of soil. The occurrence frequency of Gigaspora and Scutellospora was much higher in brown earth. The distribution of AM fungi was also affected by soil pH. Glomus occurred in soil with a wide pH range. The greater of soil alkalinity, the more Glomus were found, while the greater of soil acidity, the more Acaulospora were isolated. Scutellospora occurred mostly in soil with pH of 6\^0～7\^0, and Gigaspora distributed mainly in acid soil.
