作 者：
梁泽锐;梁芳;刘冰;檀小辉;黄兰清;招敏萍;李佳;屈子钰
单 位：
玉林师范学院 ;广西壮族自治区亚热带作物研究所
摘 要：
为筛选适宜镉污染土壤的园林湿生植物树种,以二年生红花玉蕊为试验材料,模拟全日潮、设置不同Cd~(2+)浓度对红花玉蕊进行处理,胁迫60d后测定植株叶片中的矿质元素含量且进行相关性分析。结果表明:0～100mg·kg~(-1) Cd~(2+)胁迫下的红花玉蕊植株生长发育正常,叶片中N、P、K、Fe、Cu元素含量随着Cd~(2+)浓度的增加均呈先升高后下降的趋势,各元素出现吸收高峰值在Cd~(2+)浓度25～75mg·kg~(-1),其中,N、K、Fe、Cu含量的低峰值在100mg·kg~(-1),较对照组均呈显著差异(P<0.05),P含量较对照组无显著差异。此外,不同Cd~(2+)浓度与N、K、Fe、Cu呈负相关,与P呈正相关,但均不显著。可见Cd~(2+)胁迫下红花玉蕊对矿质元素N、P、K、Fe、Cu的吸收有一定程度的影响,整体呈低浓度促进,高浓度抑制的现象,但并不影响植株正常生长发育,表明红花玉蕊对0～75mg·kg~(-1)的Cd~(2+)胁迫有较好的耐受性,在城市内河或湖泊受镉金属污染地段的景观绿化、生态修复、植物群落多样性等有一定的园林应用前景。
译 名：
Effects of Cadmium Stress on the Content of Mineral Elements in the Leaf of Barringtonia acutangula and Its Correlation Analysis
作 者：
LIANG Ze-rui;LIANG Fang;LIU Bing;TAN Xiao-hui;HUANG Lan-qing;ZHAO Min-ping;LI Jia;QU Zi-yu;Yulin Normal University;Guangxi Subtropical Crops Research Institute;
关键词：
Barringtonia acutangula;;cadmium stress;;mineral elements;;correlation analysis
摘 要：
In order to screen the garden plants suitable for cadmium polluted soil,the relationship between the changes of nitrate nitrogen(N),available phosphorus(P),available potassium(K),iron(Fe),copper(Cu)and cadmium tolerance of plants under Cd~(2+)stress was studied.Two year old Barringtonia acutangula was used as the experimental material to simulate the diurnal tide and set different concentration of Cd~(2+)to Barringtonia acutangula.The content of mineral elements in leaves of plants was measured and correlation analysis was carried out after 60 days of stress.The results showed that the plant growth and development were normal under the stress of 0-100 mg·kg~(-1) Cd~(2+),the contents of N,P,K,Fe and Cu in leaves increased first and then decreased with the increase of Cd~(2+),the highest absorption peak of each element was 25-75 mg·kg~(-1) Cd~(2+),and the low peak of N,K,Fe and Cu was 100 mg·kg~(-1),which was significantly different from the control group.There was no significant difference in P content between the two groups.In addition,different concentrations of Cd~(2+)were negatively correlated with N,K,Fe,Cu and positively correlated with P,but not significantly.It could be seen that Barringtonia acutangula had a certain degree of influence on the absorption of mineral elements N,P,K,Fe,Cu under Cd~(2+)stress,which was generally promoted by low concentration and inhibited by high concentration,but does not affect the normal growth and development of plants,indicating that Barringtonia acutangula had a good tolerance to Cd~(2+)stress within the concentration range of less than75 mg·kg~(-1),and landscape greening in urban rivers or lakes polluted by cadmium metal,ecological restoration,plant community diversity and so on have certain landscape application prospects.
