文献类型：期刊文献

英文题名：Sexual differences in root growth and antioxidant characteristics in Salix viminalis exposed to cadmium stress

作者：Zou, Junzhu[1] Zhang, Yixin[1] Li, Xia[2] Ma, Xiaodong[3] Liu, Junxiang[1] Peng, Xiangyong[4] Sun, Zhenyuan[1]

第一作者：Zou, Junzhu

通信作者：Sun, ZY[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat State Forestry A, Beijing 100091, Peoples R China;[2]Heze Univ, Coll Agr & Bioengn, Peony Inst, Heze, Peoples R China;[3]Beijing Res & Dev Ctr Grass & Environm, Beijing, Peoples R China;[4]Qufu Normal Univ, Coll Life Sci, Qufu, Shandong, Peoples R China

年份：2021

卷号：23

期号：14

起止页码：1466-1475

外文期刊名：INTERNATIONAL JOURNAL OF PHYTOREMEDIATION

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000654190700001)】；

基金：This research was funded by the Fundamental Research Funds for the Central Nonprofit Research Institution of Chinese Academy of Forestry (CAF), grant [number CAFYBB2018ZB002].

语种：英文

外文关键词：Antioxidant system; cadmium stress; phytoremediation; root morphology; sexual dimorphism; shrub willow

摘要：Salix viminalis is a typical dioecious shrub willow, which has been widely used in the heavy metal polluted soil phytoremediation due to its fast growth rate, deep root system, and metal-resistance trait. It has been reported that dioecious plants present sex-specific characteristics when exposed to biotic and abiotic stress. However, different responses to heavy metal cadmium stress between male and female plants of S. viminalis have not been clarified. In this study, male and female S. viminalis clones were treated by 100 mu M cadmium stress for a period of 21 days, and the root morphology, hydrogen peroxide content, malondialdehyde, and free proline content, antioxidant enzyme activities, and glutathione content were investigated after every 7-day interval. The results showed that female plants of S. viminalis developed thicker root diameter and volume and also accumulated more hydrogen peroxide than males at the first 7-day interval. Furthermore, sexual dichotomous indexes showed the most significant on the second 7-day interval. These findings suggest that male plants of S. viminalis have stronger cadmium tolerance than female plants and sexual differences in adaptive responses to cadmium are duration dependent, which adds to present evidence of sex-related responses to environmental stress in dioecious plants. Novelty statement Salix viminalis, a dioecious shrub willow, has been widely used in phytoremediation, yet sexually differences in tolerance to cadmium of which remained unclear. This study focused on different responses to cadmium stress between roots of male and female S. viminalis. Results show that male plants of S. viminalis have stronger cadmium tolerance than female plants, which indicates male S. viminalis should be more considered to be applied for phytoremediation and ecological restoration of cadmium-accumulated soil considering cadmium tolerance characteristics. The findings can provide valuable evidence and insights for researches focused on phytoremediation with dioecious woody plants and sexual dimorphism under abiotic stress.