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| Effect of ryegrass and Arbuscular Mycorrhiza on tomato resistance and Cd absorption in the field |
| Received:November 28, 2016 |
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| KeyWord:Cd;soil;ryegrass;Arbuscular mycorrhiza;tomato;resistance;absorption |
| Author Name | Affiliation | E-mail | | QIN Yu-li | College of Resources and Environment, Southwest University, Chongqing 400715, China | | | JIANG Ling | College of Resources and Environment, Southwest University, Chongqing 400715, China | | | XU Wei-hong | College of Resources and Environment, Southwest University, Chongqing 400715, China | xuwei_hong@163.com | | LI Tao | College of Resources and Environment, Southwest University, Chongqing 400715, China | | | ZHANG Chun-lai | College of Resources and Environment, Southwest University, Chongqing 400715, China | | | LI Yan-hua | College of Resources and Environment, Southwest University, Chongqing 400715, China | | | WANG Wei-zhong | College of Resources and Environment, Southwest University, Chongqing 400715, China | | | CHI Sun-lin | College of Resources and Environment, Southwest University, Chongqing 400715, China | | | CHEN Xu-gen | College of Resources and Environment, Southwest University, Chongqing 400715, China | | | CHEN Yong-qin | College of Resources and Environment, Southwest University, Chongqing 400715, China | | | ZHAO Wan-yi | College of Resources and Environment, Southwest University, Chongqing 400715, China | | | ZHANG Jin-zhong | College of Resources and Environment, Southwest University, Chongqing 400715, China | | | XIONG Zhi-ting | School of Resources and Environmental Science, Wuhan University, Wuhan 430079, China | |
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| Abstract: |
| A field experiment was carried out to investigate the effect of ryegrass and Arbuscular Mycorrhiza on the growth, resistance, and Cd concentration of two tomato varieties(“Defu mm-8” and “Luobeiqi”) exposed to Cd-polluted soil(5.943 mg·kg-1 Cd). The results showed that the dry weights of the leaf, stem, root, and fruit and the total dry weight of the plant increased by 2.7%~16.8%, 3.0%~16.8%, 8.4%~31.5%, 4.2%~38.4%, and 4.5%~36.6%, respectively, in the single or compound remediation using ryegrass and Arbuscular Mycorrhiza. The malonyldialdehyde(MDA) contents and activities of antioxidant enzymes in leaf and root were reduced by the single or compound remediation of ryegrass and Arbuscular Mycorrhiza(except for the activities of superoxide dismutase in the leaves). In the plants exposed to Cd-polluted soil, the cell ultrastructure was restored to normal; the cell wall thickened; and obvious vacuoles, nucleus, and other organelles in the root tip cells were observed upon single or compound remediation with ryegrass and Arbuscular Mycorrhiza. Compared to the control, Cd concentrations in the root, leaf, stem, and fruit of the two varieties decreased by 6.9%~40.9%, 5.7%~40.1%, 4.6%~34.7%, and 9.8%~42.4%, respectively, from the single or compound remediation via ryegrass and Arbuscular Mycorrhiza. The accumulation of Cd in the fruit of the tomato plant was less than that in the root, stem, and leaf. Comparing the two tomato varieties, Cd concentrations and Cd accumulations in the fruit and the total accumulation of Cd in the plant were in the order of Luobeiqi |
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