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| DOI: | 10.11829/j.issn.1001-0629.2017-0716 |
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| Web URL(s): | http://cykx.lzu.edu.cn/article/2018/1001-0629-35-11-2602.html
Last checked: 02/19/2019
http://cykx.lzu.edu.cn/CN/article/downloadArticleFile.do?attachType=PDF&id=12254
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| Publication Type:
| Refereed |
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| Author(s): | Yu, Fei;
Mahai, Tiancai;
Zhong, Woxiu;
Chen, Shuyu;
Xie, Chengcheng;
Li, Xi |
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| Author Affiliation: | Yu, Zhong, Chen, Xie, and Li: College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, China; Mahai: Chengdu Agricultural College, Chengdu, Sichuan, China |
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| Title: | Effect of lead stress on the growth and physiological characteristics of Pogonatherum paniceum and Cynodon dactylon |
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| Section: | Pre-plant production layer
Other records with the "Pre-plant production layer" Section
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| Source: | [Caoye Kexue] [Pratacultural Science]. Vol. 35, No. 11, November 20 2018, p. 2602-2613. |
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| Publishing Information: | [Lanzhou Shi, China]: ["Cao Ye Ke Xue" Bian Jibu] |
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| # of Pages: | 12 |
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| Keywords: | TIC Keywords: Cynodon dactylon; Lead; Stress; Pogonatherum paniceum
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| Abstract/Contents: | "A pot experiment was conducted to study the growth and physiological indices of Pogonatherum paniceum and Cynodon dactylon under Pb stress by contaminating soils with different concentrations of Pb2+ (0, 250, 500, 1 000, 2 000, and 4 000 mg·kg-1). We analyzed and compared the tolerance of these two common herbs to Pb in gardens, identified herbs with excellent Pb resistance for urban ecological restoration, and provide related theoretical bases. The results showed that with increasing Pb stress, P. paniceum and C. dactylon both showed stunted growth. The appearance quality, biomass, net photosynthetic rate (Pn), and chlorophyll contents of leaves decreased, and exhibited significant differences compared with plants that were not exposed to Pb (P<0.05). Exposure to Pb significantly increased the relative electrical conductivity (REC) values (P<0.05) by promoting increases in the content of osmotic adjustment substances and modifying antioxidant enzyme activities. For both plant species, the malondialdehyde (MDA), soluble sugar, and soluble protein contents, and superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) enzyme activities all showed an initial increase in response to Pb treatment followed by a gradual decrease; the exception being the POD activity of P. paniceum, which showed a steady increase. At a Pb2+ concentration of 4 000 mg·kg-1, P. paniceum reached its Pb tolerance threshold, showing obvious Pb toxicity characteristics, whereas C. dactylon did not reach a tolerance threshold at this concentration. When exposed to 2 000 mg·kg-1 Pb2+, both P. paniceum and C. dactylon can maintain a normal growth state. These plants have a high ability to absorb and enrich lead in soil, although they do not show efficiencies comparable to those of hyperaccumulator plants. Comprehensive analyses of the different responses under Pb stress indicated that C. dactylon shows a considerably greater resistance to lead stress than P. paniceum. Our study thus provides evidence that C. dactylon has substantial potential for use in the phytoremediation of Pb-contaminated soil." |
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| Language: | Chinese |
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| References: | 40 |
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| Note: | Abstract also appears in English
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Yu, F., T. Mahai, W. Zhong, S. Chen, C. Xie, and X. Li. 2018. Effect of lead stress on the growth and physiological characteristics of Pogonatherum paniceum and Cynodon dactylon. (In Chinese) [Caoye Kexue] [Pratacultural Science]. 35(11):p. 2602-2613. |
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| DOI: 10.11829/j.issn.1001-0629.2017-0716 |
| Web URL(s):
http://cykx.lzu.edu.cn/article/2018/1001-0629-35-11-2602.html
Last checked: 02/19/2019
http://cykx.lzu.edu.cn/CN/article/downloadArticleFile.do?attachType=PDF&id=12254
Last checked: 02/19/2019
Requires: PDF Reader
Notes: Direct download |
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MSU catalog number: b10275836 |
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