3种木本地被植物耐盐性的研究

Study on the salt tolerance of three woody ground cover plants

采用盆栽试验法,分别用2,3,4,5,6 μg／g NaCl溶液对亮叶忍冬(Lonicera nitida‘Maigrun’)、红叶 女贞(Ligustrum．quihoni Carr．f．atropurea)和蔓生紫薇(Lagerstroemia indica ‘summer and summer’)进行了盐胁 迫处理,测定了试材的生长量、相对生长量、盐害指数、盐害率、叶片中游离脯氨酸含量等指标,对这3种木本地被 植物的耐盐性进行了研究。结果表明,在盐胁迫下,3种供试植物的生长均受到明显抑制,其中蔓生紫薇的相对生长 量最小,亮叶忍冬的最大;盐害指数和盐害率表现为蔓生紫薇最高,亮叶忍冬最低;盐胁迫对3种植物的脯氨酸含 量均有较大影响。综合各指标的分析可知,参试3种植物的耐盐性差异较大,其耐盐性的强弱表现为亮叶忍冬>红 叶女贞>蔓生紫薇。

Three woody ground cover plants, Yunnan honeysuckle (Lonicera nitida 'Maigrun') ,Purpus privet (Ligustrum. quihoni Carr. f. atropurea) and Capemrtle (Lagerstroemia indica 'summer and summer') were studied to understand their salt tolerance when they were treated with NaCl solution in the concentration of 2,3,4,5,6 μg/g respectively. Growth increments(G)、relative growth increments (RG)、 salt injury index 、salt injury rates and free proline content in the leaves were measured after the treatments to the potted plants. The results showed that,with salinity stress,plant growth was inhibited obviously; Yunnan honeysuckle had the biggest relative growth increments and Capemrtle had the smallest one of the three. Index and rate of salt injury reached highest in Capemrtle and smallest in Yunnan honeysuckle. According to multiple analysis of the total indexes,there were significant differences between the tested plants in the respect of salt tolerance;the order of salt tolerance for the testing plants were determined as follows: Yunnan honeysuckle>Purpus privet>Capemrtle.