Germiantion of Brassica chinensis L. grown in the solution with different concentrations of lead, cadmium and chromium (single and combinative) was investigated. Root lengths decreased with the increase of lead, cadmi...Germiantion of Brassica chinensis L. grown in the solution with different concentrations of lead, cadmium and chromium (single and combinative) was investigated. Root lengths decreased with the increase of lead, cadmium and chromium in hydroponic solution. The physiological toxicity order for these three ions was Cr 6+ >Cd 2+ >Pb 2+ . The uptake of Pb by Brassica chinensis was enhanced with Pb addition. The toxicity of Cr and Pb was reduced due to precipitation of Cr 2O 7 2- and Pb 2+ . The toxicity of Cd to plant decreased when Cr 6+ was added.展开更多
In order to understand the physiological and biochemical reasons of leafcolor transformation in Loropetalum chinense var. rubrum,three types of L. chinense var. rubrum, Zihei (black purple), Zihong(red purple)and Hong...In order to understand the physiological and biochemical reasons of leafcolor transformation in Loropetalum chinense var. rubrum,three types of L. chinense var. rubrum, Zihei (black purple), Zihong(red purple)and Hongzhe(red_ochre), and L. chinense were taken as materials. The contents of chlorophyll, carotenoid and soluble sugar, and activity of phenylalanine ammonialyase (PLA) in the leaves were measured from early March to June. The results showed that the contents of chlorophyll, carotenoid and soluble sugar increased gradually during the leafcolor changing from red to green, but there were obviously differences among types of Zihei, Zihong and Hongzhe. Anthocyanins contents in Zihe and Zihong leaves maintained high level, so their leaves still kept red when they got mature in early June. Phenylalanine ammonialyase (PLA) activity decreased, and had positive relationship with anthocyanin contents. Some measures such as shading or watering to lower air temperature could be taken to maintain leaves of L. chinense var. rubrum fresh red during summer.展开更多
文摘Germiantion of Brassica chinensis L. grown in the solution with different concentrations of lead, cadmium and chromium (single and combinative) was investigated. Root lengths decreased with the increase of lead, cadmium and chromium in hydroponic solution. The physiological toxicity order for these three ions was Cr 6+ >Cd 2+ >Pb 2+ . The uptake of Pb by Brassica chinensis was enhanced with Pb addition. The toxicity of Cr and Pb was reduced due to precipitation of Cr 2O 7 2- and Pb 2+ . The toxicity of Cd to plant decreased when Cr 6+ was added.
文摘In order to understand the physiological and biochemical reasons of leafcolor transformation in Loropetalum chinense var. rubrum,three types of L. chinense var. rubrum, Zihei (black purple), Zihong(red purple)and Hongzhe(red_ochre), and L. chinense were taken as materials. The contents of chlorophyll, carotenoid and soluble sugar, and activity of phenylalanine ammonialyase (PLA) in the leaves were measured from early March to June. The results showed that the contents of chlorophyll, carotenoid and soluble sugar increased gradually during the leafcolor changing from red to green, but there were obviously differences among types of Zihei, Zihong and Hongzhe. Anthocyanins contents in Zihe and Zihong leaves maintained high level, so their leaves still kept red when they got mature in early June. Phenylalanine ammonialyase (PLA) activity decreased, and had positive relationship with anthocyanin contents. Some measures such as shading or watering to lower air temperature could be taken to maintain leaves of L. chinense var. rubrum fresh red during summer.
