HeMaMaEtAl2013

Référence

He, J., Ma, C., Ma, Y., Li, H., Kang, J., Liu, T., Polle, A., Peng, C., Luo, Z.-B. (2013) Cadmium tolerance in six poplar species. Environmental Science and Pollution Research, 20(1):163-174. (Scopus )

Résumé

Selection of poplar species with greater Cd tolerance and exploiting the physiological mechanisms involved in Cd tolerance are crucial for application of these species to phyto-remediation. The aim of this study is to investigate variation in Cd tolerance among the six poplar species and its underlying physiological mechanisms. Cuttings of six Populus species were cultivated for 10 weeks before exposure to either 0 or 200 µM CdSO4 for 20 days. Gas exchange in mature leaves was determined by a portable photosynthesis system. Cd concentrations in tissues were analyzed by a flame atomic absorbance spectrometry. Subsequently, Cd amount per plant, bio-concentration factor (BCF) and translocation factor (Tf) were calculated. Nonenzymatic compounds and activities of antioxidative enzymes in tissues were analyzed spectrophotometrically. Cd exposure caused decline in photosynthesis in four poplar species including Populus cathayana (zhonghua 1). Among the six species, P. cathayana (zhonghua 1) displayed the highest Cd concentrations in tissues, the largest Cd amount in aerial parts, the highest BCF in aerial parts and Tf under Cd exposure. Under Cd stress, increases in total soluble sugars in roots but decreases in starch in roots, wood, and leaves of P. cathayana (zhonghua 1) were found. Induced O2 ·- and H2O2 production in roots and leaves, and increases in free proline, soluble phenolics, and activities of antioxidative enzymes were observed in P. cathayana (zhonghua 1). Based on results of this pot experiment, it is concluded that P. cathayana (zhonghua 1) is superior to other five species for Cd phyto-remediation, and its well-coordinated physiological changes under Cd exposure confer the great Cd tolerance of this species. © 2012 Springer-Verlag.

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@ARTICLE { HeMaMaEtAl2013,
    AUTHOR = { He, J. and Ma, C. and Ma, Y. and Li, H. and Kang, J. and Liu, T. and Polle, A. and Peng, C. and Luo, Z.-B. },
    TITLE = { Cadmium tolerance in six poplar species },
    JOURNAL = { Environmental Science and Pollution Research },
    YEAR = { 2013 },
    VOLUME = { 20 },
    PAGES = { 163-174 },
    NUMBER = { 1 },
    ABSTRACT = { Selection of poplar species with greater Cd tolerance and exploiting the physiological mechanisms involved in Cd tolerance are crucial for application of these species to phyto-remediation. The aim of this study is to investigate variation in Cd tolerance among the six poplar species and its underlying physiological mechanisms. Cuttings of six Populus species were cultivated for 10 weeks before exposure to either 0 or 200 µM CdSO4 for 20 days. Gas exchange in mature leaves was determined by a portable photosynthesis system. Cd concentrations in tissues were analyzed by a flame atomic absorbance spectrometry. Subsequently, Cd amount per plant, bio-concentration factor (BCF) and translocation factor (Tf) were calculated. Nonenzymatic compounds and activities of antioxidative enzymes in tissues were analyzed spectrophotometrically. Cd exposure caused decline in photosynthesis in four poplar species including Populus cathayana (zhonghua 1). Among the six species, P. cathayana (zhonghua 1) displayed the highest Cd concentrations in tissues, the largest Cd amount in aerial parts, the highest BCF in aerial parts and Tf under Cd exposure. Under Cd stress, increases in total soluble sugars in roots but decreases in starch in roots, wood, and leaves of P. cathayana (zhonghua 1) were found. Induced O2 ·- and H2O2 production in roots and leaves, and increases in free proline, soluble phenolics, and activities of antioxidative enzymes were observed in P. cathayana (zhonghua 1). Based on results of this pot experiment, it is concluded that P. cathayana (zhonghua 1) is superior to other five species for Cd phyto-remediation, and its well-coordinated physiological changes under Cd exposure confer the great Cd tolerance of this species. © 2012 Springer-Verlag. },
    COMMENT = { Export Date: 21 February 2013 Source: Scopus CODEN: ESPLE doi: 10.1007/s11356-012-1008-8 },
    ISSN = { 09441344 (ISSN) },
    KEYWORDS = { Accumulation, Cadmium, Phenolics, Photosynthesis, Populus, Sugar, Tolerance, Translocation, antioxidant, bioaccumulation, cadmium, concentration (composition), deciduous tree, environmental stress, enzyme activity, gas exchange, physiology, phytoremediation, pollution exposure, pollution tolerance, root system, spectrophotometry, sugar, translocation, Populus, Populus cathayana },
    OWNER = { Luc },
    TIMESTAMP = { 2013.02.21 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84872004263&partnerID=40&md5=ff6bcbfc91bb746a28a785198d993533 },
}

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