| Cite this article: | 肖亚涛,王德哲,李世欣,等.不同Cd浓度处理下两玉米品种植株Cd分布富集和转运特性[J].灌溉排水学报,0,():-. |
| XIAO Ya-tao,WANG De-zhe,LI shixin,et al.不同Cd浓度处理下两玉米品种植株Cd分布富集和转运特性[J].灌溉排水学报,0,():-. |
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| Distribution Enrichment and Transport Characteristics of Cd in Two Maize Varieties under different Cd Concentration Treatments |
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XIAO Ya-tao1,2, WANG De-zhe2, LI shixin2, WANG Long3, SUN Chaoxiang2, SHAO Long2, GUO Wei1
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1.Key Laboratory of High-efficient and Safe Utilization of Agriculture Water Resources,Institute of Farmland Irrigation of CAAS,Chinese Academy of Agricultural Sciences;2.College of Mechanical and Electrical Engineering,Henan Agricultural University;3.College of Resources and Environment, Henan Agricultural University
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| Abstract: |
| 【Objective】In order to clarify the effect of different Cd concentration stress on the Cd accumulation process in maize, and to reveal the suitability of maize planting in Cd contaminated soil,【Method】in this study, six Cd concentration treatments were used to determine the tissue distribution of Cd in maize plants of Zhengdan 985 (ZD) and Xiangyu 335 (XY) varieties under different Cd concentration treatments. We analyzed the enrichment and transport capacity of each tissue organ for Cd, and also established the correlation analysis between Cd concentration gradient and Cd concentration of maize tissues and organs.【Result】Under the Cd contamination treatment, the distribution of Cd content was mainly concentrated in the root system, leaves and bracts, followed by the stalk/ear axis, and the lowest percentage of Cd content in the seeds was 0.08%-5.12%; the Cd content in ZD seeds increased with the increase of Cd treatment concentration, while the Cd content in XY seeds reached the maximum value of 0.26 mg.kg-1 under T3 treatment. The enrichment and translocation analysis showed that ZD and XY plants had the strongest root enrichment capacity and the weakest seed enrichment capacity, while the enrichment capacity of stems, leaves and bracts fluctuated depending on the Cd stress concentration and varietal differences. Under the same Cd concentration treatment, root-leaf and root-bud transport capacity was the strongest, but there were varietal differences and concentration effects; Cd concentration gradients were highly significantly correlated (P< 0.01) with Cd content in the root system, stem, leaf, bract, rachis and seeds of the plants, with the correlation coefficients reaching 0.973, 0.961 and 0.963 for the root system, stem and leaf, respectively.【Conclusion】The distribution, enrichment and translocation of Cd in maize plants were affected by the concentration of Cd stress and there were varietal differences. ZD and XY could be grown safely as fodder only on 1.70-15.76 mg.kg-1Cd contaminated soils, and XY had better production suitability compared to ZD only for the 1.70-6.71 mg.kg-1Cd contamination concentration range. |
| Key words: Maize; Cadmium; Distribution; Enrichment; Transport |
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