摘要
镉(Cadmium,Cd)胁迫条件下,通过水培试验研究接种(寡养单胞菌属Stenotrophomonas sp.)GBR32菌株对番茄生长和Cd累积影响.结果表明,与对照组相比,接种菌株GBR32后,番茄地上部和根部的生物量分别增加了63.6%和98.6%,MDA(malondialdehyde,丙二醛)含量分别降低了46.4%和14.5%,根部的SOD(superoxide dismutase,超氧化物歧化酶)和POD(peroxidase,过氧化物酶)活性分别降低了19.8%和10.4%,叶绿素a、叶绿素b和类胡萝卜素的含量分别提高了20.5%、38.9%和14.1%,内源茉莉酸(jasmonic acid)和乙烯(ethylene)含量显著增加.接种菌株GBR32使得番茄地上部和根部的Cd含量分别提高了46.7%和60.9%,并且降低了Cd转运系数.该研究结果可为根际细菌强化重金属污染土壤安全利用修复提供参考.
Under cadmium stress conditions,hydroponic experiments were performed to evaluate the effects of inoculation(Stenotrophomonas sp.)GBR32 strain on tomato growth and Cd accumulation.The results showed that compared with the control group,after inoculation with strain GBR32,the biomass of the shoots and roots of tomato was increased by 63.6%and 98.6%,the MDA(malondialdehyde)content was reduced by 46.4%and 14.5%,and the SOD(superoxide dismutase)and POD(peroxidase)activities of the roots were reduced by 19.8%and 10.4%respectively,the content of chlorophyll a,chlorophyll b and carotenoids were increased by 20.5%,38.9%and 14.1%respectively,and the content of endogenous jasmonic acid and ethylene also increased significantly.At the same time,the inoculation of strain GBR32 increased the Cd content in the shoots and roots of tomato by 46.7%and 60.9%respectively.The research results may provide a reference for rhizosphere bacteria to strengthen the safety use and remediation of heavy metal contaminated soils.
作者
郭军康
王敏
吕欣
魏婷
贾红磊
刘洵
刘文建
GUO Jun-kang;WANG Min;LV Xin;WEI Ting;JIA Hong-lei;LIU Xun;LIU Wen-jian(School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi′an 710021, China)
出处
《陕西科技大学学报》
北大核心
2022年第1期39-44,共6页
Journal of Shaanxi University of Science & Technology
基金
国家自然科学基金项目(41473115,41977274)
陕西省科技厅重点研发计划项目(2018ZDXM-SF-022)。
关键词
CD胁迫
根际促生菌
番茄
转运系数
植物修复
Cd stress
rhizosphere growth-promoting bacteria
tomato
translocation factor
phytoremediation
