七彩花生根瘤内生菌对氮添加的响应及其与植物化学计量特征的关系

李林, 孙毅, 杨晓琼, 方海东, 闫帮国

Response of endophytes in root nodules of Arachis hypogaea ‘Qicai’ to nitrogen addition and its relationship with plant stoichiometry characteristics

LI Lin, SUN Yi, YANG Xiao-Qiong, FANG Hai-Dong, YAN Bang-Guo

图2 不同施氮处理下七彩花生根瘤内生菌多样性(A)、主要内生菌各属丰度变化(B)、主坐标分析(PCoA) (C)、根瘤内生细菌丰度变化火山图(D)。A图中不同小写字母表示处理间差异显著(p < 0.05)。D图中的点表示一个扩增子序列变体, 红色表示在氮添加下显著上调, 绿色表示显著下调。N0, 0 kg·hm-2; N1, 140 kg·hm-2; N2, 280 kg·hm-2。Allorhizobium-Neorhizobium- Pararhizobium-Rhizobium, 根瘤菌属; Bradyrhizobium, 慢生根瘤菌属; Burkholderia-Caballeronia-Paraburkholderia, 伯克霍尔德菌属; Enterobacter, 肠杆菌属; Kosakonia, 科萨克氏菌属; Mycobacterium, 分歧杆菌属; Novosphingobium, 新鞘氨醇菌属; Pantoea, 泛菌属; Saccharimonadales, 糖单孢菌; Unassigned, 未分类。*, p < 0.05。

Fig. 2 Diversity (A), changes in the relative abundance of dominant genera (B), principal coordination analysis (PCoA) (C) and volcano plot illustrating changes in the relative abundance (D) of endophytes in root nodules under different nitrogen addition treatments of Arachis hypogaea ‘Qicai’. Different lowercase letters in A indicate significant differences among treatments (p < 0.05). Each point represents an amplicon sequence variant (ASV) in D. Each red point indicate an enriched ASV while each blue point represents a depleted ASV. N0, 0 kg·hm-2; N1, 140 kg·hm-2; N2, 280 kg·hm-2. *, p < 0.05.