| 镉胁迫下黑曲霉TL-F2的促生特征及其对黑麦草种子萌发、幼苗生长和镉含量的影响 |
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| 引用本文： | 刘如,董畅茹,张祎雯,屈铭慧,张伟,洒海洋,陈海燕,叶文玲,樊霆.镉胁迫下黑曲霉TL-F2的促生特征及其对黑麦草种子萌发、幼苗生长和镉含量的影响[J].浙江农业学报,2021,33(2):326. |
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| 作者姓名： | 刘如 董畅茹 张祎雯 屈铭慧 张伟 洒海洋 陈海燕 叶文玲 樊霆 |
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| 作者单位： | 安徽农业大学 资源与环境学院,农田生态保育与污染防控安徽省重点实验室,安徽 合肥 230036 |
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| 基金项目： | 国家重点研发计划(2019YFC1805203);国家自然科学基金(41101485);安徽省高等学校自然科学研究项目(K1952001);安徽省农田生态保育与污染防控安徽省重点实验室开放基金(FECPP201903);国家级大学生创新创业训练计划(202010364065);安徽省大学生创新创业训练计划(201910364228);安徽农业大学大学生创新基金(XJDC2019207);安徽农业大学大学生创新基金(XJDC2020463) |
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| 摘 要： | 以黑曲霉(Aspergillus niger)TL-F2为供试菌株,黑麦草为供试植物,研究Cd胁迫下A. niger TL-F2的促生特性,以及对黑麦草种子萌发、幼苗生长和Cd含量的影响。结果表明:与不加Cd的对照组相比,低浓度Cd(5 mg·L-1)胁迫下,A. niger TL-F2产吲哚乙酸(IAA)和溶磷的能力无显著变化,但产铁载体的能力显著(P<0.05)降低48.18%;中(20 mg·L-1)、高(50 mg·L-1)浓度Cd胁迫下,A. niger TL-F2产IAA的能力分别显著(P<0.05)降低55.76%和65.69%,溶磷量分别显著(P<0.05)降低50.07%和78.19%,产铁载体的能力分别显著(P<0.05)降低69.71%和80.08%。接种高浓度(1×108 mL-1)A. niger TL-F2有助于促进Cd胁迫下黑麦草种子的萌发和生长,高浓度Cd胁迫下,黑麦草地上部Cd含量较不接菌的显著(P<0.05)增加,增幅为17.95%;接种低浓度(1×106 mL-1)A. niger TL-F2对黑麦草种子萌发、Cd含量无明显促进作用。综合来看,接种适当量的A. niger TL-F2有助于促进Cd胁迫下黑麦草种子的萌发和生长,增加黑麦草地上部Cd含量,可作为黑麦草修复Cd污染水体和土壤的强化措施。
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| 关 键 词： | 黑麦草 镉 黑曲霉 种子萌发 促生特性 |
| 收稿时间： | 2020-08-17 |
Growth-promoting characteristics of Aspergillus niger TL-F2 and its effect on seed germination and cadmium content in seedlings of ryegrass under cadmium stress |
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| LIU Ru,DONG Changru,ZHANG Yiwen,QU Minghui,ZHANG Wei,SA Haiyang,CHEN Haiyan,YE Wenling,FAN Ting.Growth-promoting characteristics of Aspergillus niger TL-F2 and its effect on seed germination and cadmium content in seedlings of ryegrass under cadmium stress[J].Acta Agriculturae Zhejiangensis,2021,33(2):326. |
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| Authors: | LIU Ru DONG Changru ZHANG Yiwen QU Minghui ZHANG Wei SA Haiyang CHEN Haiyan YE Wenling FAN Ting |
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| Institution: | Anhui Province Key Lab of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China |
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| Abstract: | The growth-promoting characteristics of Aspergillus niger TL-F2, and its effects on seed germination, seedling growth and Cd content of ryegrass under Cd stress were studied. The results showed that the siderophore production of A. niger TL-F2 was significantly (P<0.05) decreased by 48.18%, and there was no significant change of indoleacetic acid (IAA) production and phosphate solubilization under low Cd (5 mg·L-1) stress. However, under medium (20 mg·L-1) and high (50 mg·L-1) Cd stress, the IAA production, phosphate solubilization and siderophore production of A. niger TL-F2 was significantly (P<0.05) decreased by 55.76% and 65.69%, 50.07% and 78.19%, 69.71% and 80.08%, respectively. Inoculation of 1×108 mL-1 A. niger TL-F2 could benefit the seed germination and seedling growth of ryegrass, and the Cd content in shoots was significantly (P<0.05) increased by 17.95% than that without inoculation under high Cd stress. However, inoculation of 1×106 mL-1 A. niger TL-F2 showed no significant effect on seed germination and seedling growth of ryegrass. The results suggested that inoculation of proper amount of A. niger TL-F2 could promote seed germination and seedling growth of ryegrass, and enhance the accumulation of Cd in the shoots of ryegrass seedlings. Therefore, inoculation of A. niger TL-F2 had the potential as a new means to enhance the remediation of Cd polluted soil and water by using ryegrass. |
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| Keywords: | ryegrass cadmium Aspergillus niger seed germination growth-promoting characteristics |
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