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Responses of propagule germination and sexual reproduction of submerged macrophytes exposed to cadmium

文献类型：期刊论文

作者Cao, Yu1,2; Liu, Hui1,3,4; Sun, Junyao1,2; Liu, Yang1,2,5; Jiang, Hong Sheng1,2; Wang, Wei1,2; Li, Wei1,2
刊名CHEMOSPHERE
出版日期2019-03-01
卷号219页码:436-443
关键词Submerged macrophytes Ottelia alismoides Vallisneria spinulosa Seed germination Tuber Cadmium
ISSN号0045-6535
DOI10.1016/j.chemosphere.2018.12.056
英文摘要Submerged macrophytes are considered the main primary producers in shallow lakes. Recently, they have experienced a decline due to increasing environmental impacts, e.g., excessive heavy metal loads. Compared to extensive studies on vegetative growth, reports on effects of heavy metals on propagule germination and reproduction remain scarce. In this study, three experiments were conducted to investigate the effects of cadmium (Cd) on the propagule germination and sexual reproduction of submerged macrophytes. In Experiment I, six Cd concentrations were used (0, 0.05, 0.5,1, 2.5, and 5 mg L-1), with seed germination found to be marginally affected by Cd treatment. In Experiment II, Cd exposure (5 d) at the six Cd concentrations was performed 15, 30, 60, 90, and 120 d prior to the designated germination date for turions/tubers. The Vallisneria spinulosa tubers did not germinate at >= 2.5 mg Cd L-1 when exposed to Cd 90 and 120 d prior to germination, whereas the Potamogeton crispus turions remained viable but with a low germination rate at >= 2.5 mg Cd L-1. In Experiment III, with an increase from 0 to 0.5 Cd mg L-1, the fruit weight of Ottelia alismoides and V. spinulosa decreased, whereas the fruit number increased for O. alismoides but not for V. spinulosa. Furthermore, the phenology of sexual reproduction for both species advanced under Cd exposure. In summary, Cd exposure affected the germination of asexual propagules and sexual reproduction of submerged macrophytes, with seeds found to be tolerant of Cd treatment up to 5 mg L-1. (C) 2018 Elsevier Ltd. All rights reserved.
资助项目National Natural Science Foundation of China[31800396]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000457511700050
出版者PERGAMON-ELSEVIER SCIENCE LTD
源URL[http://202.127.146.157/handle/2RYDP1HH/6752]  
专题中国科学院武汉植物园
通讯作者Li, Wei
作者单位1.Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Hubei, Peoples R China
2.Chinese Acad Sci, Hubei Key Lab Wetland Evolut & Ecol Restorat, Wuhan Bot Garden, Wuhan 430074, Hubei, Peoples R China
3.Minist Water Resources, Key Lab Ecol Impacts Hydraul Projects & Restorat, Inst Hydroecol, Wuhan 430079, Hubei, Peoples R China
4.Chinese Acad Sci, Wuhan 430079, Hubei, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Cao, Yu,Liu, Hui,Sun, Junyao,et al. Responses of propagule germination and sexual reproduction of submerged macrophytes exposed to cadmium[J]. CHEMOSPHERE,2019,219:436-443.
APA Cao, Yu.,Liu, Hui.,Sun, Junyao.,Liu, Yang.,Jiang, Hong Sheng.,...&Li, Wei.(2019).Responses of propagule germination and sexual reproduction of submerged macrophytes exposed to cadmium.CHEMOSPHERE,219,436-443.
MLA Cao, Yu,et al."Responses of propagule germination and sexual reproduction of submerged macrophytes exposed to cadmium".CHEMOSPHERE 219(2019):436-443.

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来源：武汉植物园

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