Hexavalent chromium induced stress and metabolic responses in hybrid willows.

作者: Xiao-Zhang Yu , Ji-Dong Gu , Shen-Zhuo Huang

DOI: 10.1007/S10646-006-0129-6

关键词: Superoxide dismutaseCatalaseChlorophyllSalix matsudanaHexavalent chromiumShootTranspirationAscorbic acidChemistryHorticultureBotany

摘要: Metabolic responses to hexavalent chromium (Cr6+) stress and the uptake translocation of Cr6+, were investigated using pre-rooted hybrid willows (Salix matsudana Koidz x Salix alba L.) exposed hydroponic solution spiked with K2CrO4 at 24.0+1 degrees C for 192 h. Various physiological parameters plants monitored determine toxicity from Cr6+ exposure. At treatments 50% higher than that non-treated control plants. As Cr concentrations increased further, a slight increase in transpiration rate was also observed compared controls. Negligible difference chlorophyll contents leaves between treated measured, except 1.05 mg Cr/l. The response soluble proteins remarkable. Cr-induced appeared all resulting reduced activities catalase (CAT) peroxidase (POD) Superoxide dismutases (SOD) activity leaf cells showed positive after Of selected parameters, most sensitive doses, showing significant linear correlation negatively (R-2=0.931). Uptake by grown flasks found linearly added (a zero order kinetics), as indicated high R-2 (0.9322). Recovery different parts plant materials varied significantly roots being dominant site accumulation. Although shoots detected, amount translocated considerably small. capacity assimilate evaluated detached sealed glass vessels vivo. mediated possibly through an active transport mechanism, whereas cuticle major obstacle solution. In addition, both cysteine ascorbic acid remarkable potential reduce neutral pH. Results did not cause deleterious effects on functions over 192-h period Significant removal presence willows. data suggest phytoremediation is possible ecologically safe due minor aerial tissues.

参考文章(51)
Maria Greger, Metal Availability, Uptake, Transport and Accumulation in Plants Springer, Berlin, Heidelberg. pp. 1- 27 ,(2004) , 10.1007/978-3-662-07743-6_1
Jörg Schönherr, Markus Riederer, Foliar Penetration and Accumulation of Organic Chemicals in Plant Cuticles Reviews of Environmental Contamination and Toxicology. ,vol. 108, pp. 1- 70 ,(1989) , 10.1007/978-1-4613-8850-0_1
Jerome O Nriagu, Evert Nieboer, None, Chromium in the natural and human environments Wiley. ,(1988)
Sonal Srivastava, Satya Prakash, M.M. Srivastava, Chromium mobilization and plant availability — the impact of organic complexing ligands Plant and Soil. ,vol. 212, pp. 201- 206 ,(1999) , 10.1023/A:1004691217480
Adel M. Zayed, Norman Terry, Chromium in the environment: factors affecting biological remediation Plant and Soil. ,vol. 249, pp. 139- 156 ,(2003) , 10.1023/A:1022504826342
I.M. Zeid, Responses of Phaseolus Vulgaris Chromium and Cobalt Treatments Biologia Plantarum. ,vol. 44, pp. 111- 115 ,(2001) , 10.1023/A:1017934708402
V. K. Madan, Radha Jain, S. Srivastava, Influence of chromium on growth and cell division of sugarcane. Indian journal of plant physiology. ,vol. 5, pp. 228- 231 ,(2000)
B Halliwell, J M C Gutteridge, OXYGEN TOXICITY, OXYGEN RADICALS, TRANSITION METALS AND DISEASE Biochemical Journal. ,vol. 219, pp. 1- 14 ,(1984) , 10.1042/BJ2190001