Cadmium Accumulation and Tolerance in Seven Ornamental Willow Genotypes.

Weidong Yang, Feifei Wu, Zheli Ding, Xincheng Zhang, Fengliang Zhao, Yuyan Wang, Xiaoe Yang

Journal: Bulletin of environmental contamination and toxicology 2018;101(5):644-650

PMID: 30368573

Abstract

Cadmium (Cd) accumulation and tolerance in seven ornamental willow genotypes were investigated at different Cd levels (0, 5, 25, 50, and 100 µM) through hydroponic culture in a greenhouse. Severe phytotoxic symptoms in leaves and roots including leaf chlorosis and root browning were noticed when grown at ≥ 50 µM Cd. All genotypes showed high tolerance to low Cd levels (5 µM and 25 µM Cd), in contrast to high Cd levels (i.e. 50 µM and 100 µM) that severely disturbed plant growth of all genotypes. Cadmium concentrations reached 165.0-1251.0 µg g DW in leaves, 22.9-331.2 µg g in stems among the genotypes at 5-25 µM Cd, and Cd mainly accumulated in the roots. Although willow tissues can accumulate relatively high Cd concentrations under high Cd levels (≥ 50 µM), they are not suitable for phytoextraction of Cd due to poor growth.

Address: Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.; Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.; Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China.; Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.; Ministry of Agriculture Danzhou Scientific Observing and Experimental Station of Agro-Environment, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China.; Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.; College of Agricultural Economy and Technology, Jiujiang Vocational University, Jiujiang, China.; Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China. [email protected].

DOI: 10.1007/s00128-018-2434-1

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https://dx.doi.org/10.1007/s00128-018-2434-1

MeSH Terms: Biodegradation, Environmental, Cadmium, Genotype, Hydroponics, Plant Leaves, Plant Roots, Salix, Soil Pollutants