Liao Xiao-Yong, Gong Xue-Gang, Yan Xiu-Lan, Ma Xu, Wu Ze-Ying
Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Huan Jing Ke Xue. 2016 Dec 8;37(12):4841-4847. doi: 10.13227/j.hjkx.201604093.
To ascertain absorption of arsenate and phenanthrene as well as their influence on carbon groups in excised roots of L., the chemical structure of the carbon groups in excised roots was characterized by solid stateC-Nuclear Magnetic Resonance (C-NMR). The results showed that the excised roots could effectively absorb As and PHE without transpiration, and PHE promoted As accumulation in the roots. Similarly, arsenate increased the adsorption of PHE by the excised roots, the concentration of PHE was increased by 15%-53% compared with CK. The carbon groups of the excised roots were dominated by O-alkyl C, the percentage of carboxyl C was the lowest, mainly composed of carboxylic acids, esters and amides. With the addition of As and PHE, the percentage of carboxyl C increased significantly. The more stable and complex aromatic organic matter was formed to improve the resistance and adaptability in excised roots of L. under As and PHE stress.
为了确定砷酸盐和菲的吸收情况以及它们对狐尾藻离体根中碳基团的影响，通过固态碳核磁共振（C-NMR）对离体根中碳基团的化学结构进行了表征。结果表明，离体根在无蒸腾作用的情况下能够有效吸收砷和菲，且菲促进了砷在根中的积累。同样，砷酸盐增加了离体根对菲的吸附，与对照相比，菲的浓度提高了15%-53%。离体根的碳基团以O-烷基碳为主，羧基碳的百分比最低，主要由羧酸、酯和酰胺组成。随着砷和菲的添加，羧基碳的百分比显著增加。在砷和菲胁迫下，狐尾藻离体根中形成了更稳定、更复杂的芳香有机物，以提高其抗性和适应性。
