本文選題：茶樹 + 銅脅迫��； 參考：《江蘇農(nóng)業(yè)科學(xué)》2016年11期

【摘要】：為了分析不同茶樹對Cu脅迫的生理響應(yīng)及組織亞細(xì)胞Cu分布特性,采用水培法,探討鐵觀音、肉桂2種茶樹在不同濃度Cu脅迫下,茶樹根部、葉部生理響應(yīng)及其亞細(xì)胞Cu分布特征,以期為重金屬對茶樹毒害機(jī)制和茶樹對重金屬的自我防御研究提供理論依據(jù)。結(jié)果表明,隨著Cu脅迫濃度的增加,茶樹根部、葉部SOD、POD、CAT活性呈現(xiàn)下降趨勢,且肉桂對Cu脅迫的耐受性高于鐵觀音。相同濃度Cu脅迫下2種茶樹不同組織亞細(xì)胞中的Cu含量根部大于葉片。正常條件下,2種茶樹根部、葉部亞細(xì)胞組分中細(xì)胞器的Cu含量最高,當(dāng)脅迫Cu濃度0 mg/L、≤40 mg/L時(shí),細(xì)胞溶質(zhì)Cu含量最高,當(dāng)脅迫Cu濃度40 mg/L時(shí),細(xì)胞壁Cu含量最高。Cu脅迫下,鐵觀音主要采取提高細(xì)胞溶質(zhì)和細(xì)胞器中Cu離子含量來降低Cu離子毒害,而肉桂主要以提高細(xì)胞壁中Cu離子的結(jié)合率來降低Cu離子毒害,可見不同的茶樹在Cu脅迫下所表現(xiàn)的解毒模式存在著一定差異。
[Abstract]:In order to analyze the physiological response of different tea plants to Cu stress and the distribution characteristics of Cu in tissue subcells, the roots of tea plants were studied under different concentrations of Cu stress by using water culture method. The physiological response of leaves and the distribution of Cu in the subcells are expected to provide a theoretical basis for the study of the toxic mechanism of heavy metals to tea plants and the self-defense of tea plants against heavy metals. The results showed that the activities of POD cat in the roots and leaves of tea plants decreased with the increase of Cu stress concentration, and the tolerance of cinnamon to Cu stress was higher than that of Tieguanyin. Under the same concentration of Cu, the content of Cu in the subcells of different tissues of two tea plants was higher than that in the leaves. Under normal conditions, the content of Cu in the organelle of the subcellular components of two tea plants was the highest, when the concentration of Cu was 0 mg / L, 鈮，

本文編號：1779209