Effects of heterogeneous Cd stress on root growth of <i>Vicia faba</i> and <i>Sonchus asper</i>

• Main Authors: LI Bo, YUAN Xing-chao, ZHAN Fang-dong, YIN Xiao-qing, JIANG Ming, QIN Li, ZU Yan-qun, LI Yuan
• Format: Article
• Language: zho
• Published: Agro-Environmental Protection Institute, Ministry of Agriculture 2019-01-01
• Series: Journal of Agricultural Resources and Environment
• Subjects: <i>Vicia faba</i>, <i>Sonchus asper</i>, heterogeneous Cd stress, root length, root surface area, root volume
• Online Access: http://www.aed.org.cn/nyzyyhjxb/html/2019/1/20190108.htm

A controlled glasshouse experiment was conducted to explore the effects of heterogeneous Cd stress on root growth of <i>Vicia faba</i> and <i>Sonchus asper</i>. The root length, root surface area and root volume were examined. The results showed that the root length, root surface area and root volume of <i>Vicia faba</i> was greater increase in no Cd patches than in the Cd stress patches. The root length, root surface area and root volume of <i>Sonchus asper</i> was greater increase in Cd stress patches than in no Cd patches. When the root diameter of <i>Vicia faba</i> was 0~0.5 mm and the soil depth was 15~20 cm, the root length, root surface area and root volume in no Cd patches were 4.63, 3.14 times and 2.39 times that in the Cd stress patches; Root diameter for 0.5~1 mm and greater than 1 mm, soil depth of 30~35 cm, root length in no Cd patches were 1.69 times and 5.04 times that in the Cd stress patches, root surface area in no Cd patches were 1.78 times and 5.05 times that in the Cd stress patches, root volume in no Cd patches were 1.85 times and 33 times that in the Cd stress patches. When the root diameter of <i>Sonchus asper</i> was 0~0.5mm and the soil depth was 0~5 cm, the root length, root surface area and root volume in the Cd stress patches were 1.66, 1.36 times and 1.57 times that in no Cd patches; Root diameter for 0.5~1 mm, soil depth of 35~40 cm, the root length, root surface area and root volume in the Cd stress patches were 2.86, 2.16 times and 2.81 times that in no Cd patches; Root diameter for greater than 1 mm, soil depth of 15~20 cm, the root length, root surface area and root volume in the Cd stress patches were 26.94, 52.26 times and 139.33 times that in no Cd patches. The root growth of <i>Vicia faba</i> was alleviated, and the root growth of <i>Sonchus asper</i> was promoted under Cd stress.