由于植物AMF的特异性,丛枝菌根真菌(AMF)对植物的影响跨越了从共生到寄生的连续体,这掩盖了AMF在退化土地恢复中的利用。锦鸡儿,海参草,小叶锦鸡儿,和甘菊是库布其沙漠中最常用的植被恢复植物,中国,AMF对其重建的影响还有待进一步探讨。在这里,使用温室实验,我们测试了4种植物和它们的同源或异源AMF之间的植物-AMF反馈,从库布其沙漠的根际找到的。对于所有这些植物-AMF对,AMF显示出对植物生长的有益作用。一般来说,AMF增加了C.korshinskii的生物量,H.laeve,C.小叶,和P.annua分别为97.6、50.6、46.5和381.1%,分别,相对于控制。此外,检测到AMF-植物特异性。P.Annua长得最好,但在同种AMF群落中,小叶菜生长最差。来自黄菊的AMF群落对所有植物表现出最大的有益作用(生物量增加63.9-734.4%),而来自C.microphilla的AMF群落对所有植物的有益作用最小(生物量增加9.9-59.1%),除了黄花假单胞菌(生物量增加292.4%)。AMF对植物生长的影响程度与相应AMF共现网络的复杂性呈负相关。总的来说,这项研究表明,由于植物-AMF的特异性,AMF对植物生长的影响有所不同。我们还观察到来自黄花假单胞菌的天然AMF的广谱益处,这表明其在沙漠植被恢复中的潜在利用。
Effects of arbuscular mycorrhizal fungi (AMF) on plants span the continuum from mutualism to parasitism due to the plant-AMF specificity, which obscures the utilization of AMF in the restoration of degraded lands. Caragana korshinskii, Hedysarum laeve, Caragana microphylla, and Poa annua are the most frequently used plants for revegetation in Kubuqi Desert, China, and the influence of AMF on their re-establishment remains to be explored further. Herein, using a greenhouse experiment, we tested the plant-AMF feedbacks between the four plant species and their conspecific or heterospecific AMF, retrieved from their rhizosphere in the Kubuqi Desert. AMF showed beneficial effects on plant growth for all these plant-AMF pairs. Generally, AMF increased the biomass of C. korshinskii, H. laeve, C. microphylla, and P. annua by 97.6, 50.6, 46.5, and 381.1%, respectively, relative to control. In addition, the AMF-plant specificity was detected. P. annua grew best, but C. microphylla grew worst with conspecific AMF communities. AMF community from P. annua showed the largest beneficial effect on all the plants (with biomass increased by 63.9-734.4%), while the AMF community from C. microphylla showed the least beneficial effect on all the plants (with biomass increased by 9.9-59.1%), except for P. annua (a 292.4% increase in biomass). The magnitude of AMF effects on plant growth was negatively correlated with the complexity of the corresponding AMF co-occurrence networks. Overall, this study suggests that AMF effects on plant growth vary due to plant-AMF specificity. We also observed the broad-spectrum benefits of the native AMF from P. annua, which indicates its potential utilization in the restoration of the desert vegetation.