文献类型：期刊文献

英文题名：Variability in growth and cadmium accumulation capacity among willow hybrids and their parents: implications for yield-based selection of Cd-efficient cultivars

作者：Wang, Shufeng[1] Volk, Timothy A.[2] Xu, Jin[2]

第一作者：王树凤

通信作者：Volk, TA[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China;[2]State Univ New York, Coll Environm Sci & Forestry, 1 Forestry Dr, Syracuse, NY 13210 USA

年份：2021

卷号：299

外文期刊名：JOURNAL OF ENVIRONMENTAL MANAGEMENT

收录：;Scopus(收录号：2-s2.0-85114136824);WOS:【SCI-EXPANDED(收录号:WOS:000704783200001)】；

基金：The study was supported by Natural Science Foundation of China (grant No. 31770653), China Scholarship Council (file No. 201803270005), Zhejiang Science and Technology Major Program on Agricultural New Variety Breeding (2016C02056-11) and the State University of New York College of Environmental Science and Forestry. We are grateful to Karl Hallen, Kaitlin Knutson, and Nafisa Tabassum for the help with willow cuttings collection in the field, to Cole Canty and Justin Heavey for helping with plant harvest and data collection, and to Mark Eisenbies for providing statistical assistance.

语种：英文

外文关键词：Cadmium (Cd); Salix; Phytoremediation; Biomass production; Cadmium accumulation and translocation; Cd heterosis

摘要：Growth responses and cadmium (Cd) accumulation in willow cultivars help determine their potential in remediation of Cd-contaminated conditions. Seventeen willow cultivars, including hybrids and their parents, were grown in hydroponic conditions in a greenhouse, and their capacity for Cd tolerance and accumulation was compared. The results showed that shoot length, biomass production, and concentrations of photosynthetic pigments were significantly affected by 10 mu M and 30 mu M Cd treatments compared with the control. Biomass production varied across all cultivars and treatments, with maximum shoot dry weight in Owasco grown in 10 mu M Cd (11.7 +/- 4.5 g plant-1), and minimum in FC187 in 30 mu M Cd (0.3 +/- 0.1 g plant-1). Furthermore, shoot growth proved to be more sensitive to Cd than root growth. Cultivars tolerance to Cd stress varied as indicated by tolerance indices (TIs) ranging from 0.13 to 1.81 for shoots, and from 0.49 to 2.63 for roots. Cd accumulation also differed across treatments and cultivars, with average concentration of 217.49 mu g. g-1 in shoots and 478.47 mu g. g-1 in roots. Total amounts of Cd in all plant parts ranged from 38.98 to 4116.05 mu g per plant, and cultivars SX64, Cicero, and Owasco exhibited a translocation factor (TF) of greater than 1. The correlation and path coefficient analyses demonstrated that shoot biomass reflected Cd transport and phytoextraction ability in selected willow cultivars. Our results also revealed that cultivars with higher leaf Cd concentration could be used as Cdefficient parents to generate hybrids for Cd phytoextraction. Cultivars with higher biomass production translocated and accumulated more Cd in their aerial parts, and this finding will facilitate yield-based selection of candidates for Cd phytoextraction and for bioenergy production.