Effect of Zn toxicity on root morphology, ultrastructure, and the ability to accumulate Zn in Moso bamboo (Phyllostachys pubescens)
Effect of Zn toxicity on root morphology, ultrastructure, and the ability to accumulate Zn in Moso bamboo (Phyllostachys pubescens)
复制标题
锌毒性对毛竹根系形态、超微结构和富锌能力的影响
DOI：
10.1007/s11356-014-3271-3
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发表时间：
2014-12-01
影响因子：
5.8
通讯作者：
Lu, Kouping
中科院分区：
文献类型：
--
作者：
Liu, Dan;Chen, Junren;Lu, Kouping
研究了锌对毛竹种子萌发和生长的影响。锌胁迫下，种子发芽率与对照差异不显著。水培试验表明，毛竹笋对锌的积累能力较强，在100亩时达到最大值。根锌浓度变化范围为2,329.29~8,642.51 mg kg(-1)，10亩施锌处理的根锌浓度是对照的58.23倍。根形态参数在低锌处理下略有增加，而在高锌处理下生长受到明显抑制。根的超微结构研究表明，与对照相比，锌胁迫下根的细胞结构、根尖和细胞器发生了明显的变化。根细胞的细胞壁、液泡、线粒体、质膜、液泡膜和木质部薄壁组织有明显的异常。虽然毛竹似乎是一种合适的植物修复候选者，但其对金属的修复能力应在未来的研究中进一步探索。
The effects of zinc (Zn) on seed germination and growth of Moso bamboo (Phyllostachys pubescens) were investigated. Under zinc stress, the seed germination rate did not show significant difference from that of the control. Hydroponics experiments indicated that Moso bamboo had a strong ability to accumulate Zn in the shoot and it reached its maximum value in the shoot at 100 mu M Zn. The root Zn concentration ranged from 2,329.29 to 8,642.51 mg kg(-1), with the root Zn concentration at 10 mu M Zn being 58.23 times that of the control. The root morphology parameters slightly increased at the lower Zn treatments, while growth restriction was evident at higher Zn treatments. Root ultrastructural studies revealed that the cell structure, root tips, and organelles were significantly changed under Zn stress as compared to those of the control. Some abnormalities were evident in the cell walls, vacuoles, mitochondria, plasmalemma, tonoplast, and xylem parenchyma of root cells. While Moso bamboo seems a suitable candidate for phytoremediation, its metal remediation ability should be further explored in future investigations.