NaCl Improves Suaeda salsa Aniline Tolerance in Wastewater

Jie Xu, Yi Liu, Chao Zhu, Honglei Jia, Changyan Tian, Hongrui Ma and Guanghui Lv
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Jie Xu: State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
Yi Liu: State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
Chao Zhu: School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China
Honglei Jia: School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China
Changyan Tian: State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
Hongrui Ma: School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China
Guanghui Lv: College of Resources and Environment Science, Xinjiang University, Urumqi 830046, China

Sustainability, 2020, vol. 12, issue 18, 1-16

Abstract: Halophytes have been studied as a model for morphological traits of adaptation to saline environments. However, little information has been given on plant growth, chlorophyll fluorescence responses, and change of ion content in halophytes grown in an aniline–salinity coexistent environment. This study hypothesized that aniline could induce alterations in plant growth, chlorophyll fluorescence, and ion content in Suaeda salsa , but salinity could promote the tolerance of halophytes to aniline. A 6 (aniline) × 3 (NaCl) factorial experiment (for a total of 18 treatments) was conducted to test the above hypothesis. After 30 d of cultivation, roots and shoots were harvested separately to analyze the effects of salinity on the seedling growth under aniline stress. Biomass accumulation was inhibited by aniline treatment, and the inhibition was significantly alleviated by 200 mM NaCl. The change in chlorophyll fluorescence in leaves with aniline stress was moderated by the addition of NaCl. The removal efficiency of aniline was significantly enhanced by moderate salinity. Aniline stress decreased the accumulation of Mg 2+ , but various concentrations of NaCl increased the accumulation of Mg 2+ , especially with 200 mM NaCl in both roots and shoots. Both aniline and salinity decreased the content of Ca 2+ . There was a negative correlation between the K + and NaCl concentrations and between the Cl − and aniline concentrations. Our results indicated that Suaeda salsa may be suitable for the remediation of salinity and aniline-enriched wastewater.

Keywords: halophytes; aniline; salinity; chlorophyll fluorescence (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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