Effects of CO2 application coupled with endophyte inoculation on rhizosphere characteristics and cadmium uptake by Sedum alfredii Hance in response to cadmium stress

被引：16
作者：
Tang, Lin [1 ]
Hamid, Yasir [1 ]
Sahito, Zulfiqar Ali [1 ]
Gurajala, Hanumanth Kumar [1 ]
He, Zhenli [2 ]
Yang, Xiaoe [1 ]
机构：
[1] Zhejiang Univ, Coll Environm & Resources Sci, Minist Educ, Key Lab Environm Remediat & Ecosyst Hlth, Hangzhou 310058, Zhejiang, Peoples R China
[2] Univ Florida, Inst Food & Agr Sci, Indian River Res & Educ Ctr, Ft Pierce, FL 34945 USA
来源：
JOURNAL OF ENVIRONMENTAL MANAGEMENT | 2019年 / 239卷
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
Biofortification; Heavy metal; Hyperaccumulator; Root exudation; Root morphological properties; GROWTH-PROMOTING BACTERIA; ELEVATED ATMOSPHERIC CO2; PLANT-GROWTH; HYPERACCUMULATING PLANT; PHOTOSYNTHETIC CHARACTERISTICS; SUBCELLULAR-DISTRIBUTION; CONTAMINATED SOILS; TOLERANT PLANT; ROOT EXUDATION; TRACE-ELEMENTS;
D O I：
10.1016/j.jenvman.2019.03.084
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Comparative impact of CO2 application and endophyte inoculation was investigated on the growth, rhizosphere characteristics, and cadmium (Cd) absorption of two ecotypes of Sedum alfredii Hance in response to Cd stress under hydroponic or rhizo-box culture conditions. The results showed that both CO2 application and endophyte inoculation significantly (P < 0.05) promoted plant growth (fresh weight and dry weight), improved root morphological properties (SRL, SRA, SRV, ARD and RTN) and exudation (pH, TOC, TN, soluble sugar and organic acids), changed Cd uptake and distribution of both ecotypes of S. alfredii. Meanwhile soil total and DTPA extractable Cd in rhizo-box decreased by biofortification treatments. Superposition biofortification exhibits utmost improvement for the above mentioned parameters, and has potential for enhancing phytoremediation efficiency of hyperaccumulator and sustaining regular growth of non-hyperaccumulator in Cd contaminated soils.
引用
收藏
页码：287 / 298
页数：12
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