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10 期               陈娇娇等: 镉积累对艾纳香内生菌群落结构和共发生网络的影响                                          1 8 9 1

            Berry 和 Widder(2014) 阐述的复杂网络能更好应                     distribution and chemical forms of cadmium in Blumea
            对环境变化观点相一致ꎮ 在本研究中ꎬCd 积累下                             balsamifera [J]. Seedꎬ 41(2): 31-39. [陈子涵ꎬ 任建国ꎬ
            艾纳香器官叶的模块性远低于茎和根ꎬ说明叶部                                庞玉新ꎬ 等ꎬ 2022. 镉胁迫对艾纳香抗性生理、亚细胞镉
            内生菌共发生网络模块间联系紧密且不同物种分                                分布和镉化学形态的影响 [J]. 种子ꎬ 41(2): 31-39.]
                                                               CHENG Cꎬ WANG Rꎬ SUN LJꎬ et al.ꎬ 2021. Cadmium ̄
            布于不同的模块ꎬ有利于形成特定生态位相对稳
                                                                 resistant and arginine decarboxylase ̄producing endophytic
            定的共生内生菌群落以适应 Cd 积累胁迫ꎮ 因此ꎬ
                                                                 Sphingomonas sp. C40 decreases cadmium accumulation in
            在本研究中ꎬCd 污染可能通过诱导艾纳香建立更
                                                                 host rice (Oryza sativa cliangyou 513) [J]. Chemosphereꎬ
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            关联强度来应对 Cd 积累的影响ꎮ 值得注意的是ꎬ                          CHU CQꎬ FAN MYꎬ SONG CYꎬ et al.ꎬ 2021. Unveiling
            本文并未设置 Cd 对艾纳香生长的抑制浓度且研                              endophytic bacterial community structures of different rice
            究样本量有限ꎬ存在不足之处ꎮ 因此ꎬ在后续的研                              cultivars grown in a cadmium ̄contaminated paddy field

            究中将进一步改进研究方案ꎬ使其变得更加深入、                               [J]. Front Microbiolꎬ 12: 756327.
                                                               FUENTES ̄RAMIREZ   LEꎬ  CABALLERO ̄MELLADO    Jꎬ
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                 (1)MiSeq 测序表明ꎬCd 积累提高了艾纳香各
                                                                 common reed harboring an endophytic bacterium promoting
            器官内生菌 α 多样性ꎬ各器官 α 多样性总体表现                            seedling growth under cadmium stress [ J]. Environ Sci
            为根>茎>叶ꎮ (2) RDA 分析表明ꎬ艾纳香器官内                          Pollut Res Intꎬ 25(9): 8871-8879.
            生菌群落组成与植株器官 Cd 含量和根际土壤 Cd                          HALLMANN Jꎬ QUADT ̄HALLMANN Aꎬ MAHAFFEE WFꎬ et
            含量密切相关ꎬ并且大多数内生菌与植株体 Cd 含                             al.ꎬ 1997. Bacterial endophytes in agricultural crops
            量和根际土壤 Cd 含量呈正相关ꎮ (3) 线性判别分                          [J]. Can J Microbiolꎬ 43(10): 895-914.
            析(LEfSe)表明ꎬ艾纳香根中内生菌差异物种较茎                          HARDOIM PRꎬ VAN OVERBEEK LSꎬ ELSAS JDꎬ 2008.
            和叶丰富ꎮ 此外ꎬCd 积累显著增加了根、茎和叶中                            Properties of bacterial endophytes and their proposed role in
                                                                 plant growth [J]. Trends Microbiolꎬ 16(10): 463-471.
            的分枝杆菌属、类诺卡氏菌属、慢性根瘤菌属、鞘
                                                               HE Lꎬ REN YZꎬ ZENG WMꎬ et al.ꎬ 2021. Deciphering the
            氨醇单细胞菌属、乳杆菌属、纤维单胞菌属、芽孢
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            杆菌属、Mesorhizobium、Rhizobacter 等属的耐 Cd 内
                                                                 metallophyte Commelina communis in different Cu ̄polluted
            生菌数量ꎮ (4)共发生网络分析表明ꎬ艾纳香根和
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            叶中 Cd 积累使内生菌共发生网络变得更加复杂ꎮ                           HE YMꎬ YANG ZXꎬ LI MRꎬ et al.ꎬ 2017. Effects of a dark
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