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| Effect of Cadmium on Accumulation Characteristics of Cadmium in the Two Ecotypes of Kyllinga brevifolia Rottb |
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| KeyWord:Kyllinga brevifolia Rottb; cadmium; accumulation characteristics; ecotypes |
| Author Name | Affiliation | | HAO Xiao-qing | College of Resource and Environmental Science, Sichuan Agricultural University, Chengdu 611130, China | | LI Ting-xuan | College of Resource and Environmental Science, Sichuan Agricultural University, Chengdu 611130, China | | ZHANG Xi-zhou | College of Resource and Environmental Science, Sichuan Agricultural University, Chengdu 611130, China | | YU Hai-ying | College of Resource and Environmental Science, Sichuan Agricultural University, Chengdu 611130, China | | ZHANG Shu-jin | College of Resource and Environmental Science, Sichuan Agricultural University, Chengdu 611130, China
Meishan Agricultural Quality Inspection and Testing Center, Meishan 620010, China |
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| Abstract: |
| Kyllinga brevifolia Rottb, a perennial herb, is reported to accumulate Pb from soil. However, little is known about its ability to accumulate cadmium（Cd） from soil. Here we examined the plant growth and Cd accumulation of two ecotypes of K. brevifolia Rottb（mining ecotype-ME and non-mining ecotype-NME） grown at different levels of Cd for 60 days using a pot experiment. The biomass of two ecotypes was not affected by 2 mg·kg-1 Cd treatment, while it decreased significantly at higher Cd concentrations. At 200 mg·kg-1, the ME plants died, whereas the NME still grew, showing a higher Cd tolerance than ME. The Cd concentrations and accumulation of K. brevifolia Rottb increased with soil Cd. Exposed to 200 mg·kg-1, the NME contained 498.66 mg·kg-1 and 1 016.09 mg·kg-1 Cd, and accumulated 80.00 μg·pot-1 and 123.82 μg·pot-1 Cd in the shoots and roots, respectively. The Cd bioaccumulation coefficient of two ecotypes of K. brevifolia Rottb was greater than 1, indicating their Cd enrichment ability. The maximum translocation factor was 0.55 and 0.53 for the ME and NME, respectively. The results show that two ecotypes of K. brevifolia Rottb have ability to tolerate and accumulate Cd, with the NME showing better performance in higher Cd soils. |
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