不同宁夏枸杞品种种子耐锂性综合评价

Comprehensive evaluation of lithium tolerance of seeds of different Lycium barbarum cultivars

摘要:

【目的】 探究不同品种宁夏枸杞（Lycium barbarum）种子的耐锂性强弱。【方法】 采用氯化锂 （LiCl）溶液模拟锂环境，研究11份宁夏枸杞种子的发芽势、发芽率、发芽指数、芽长、根长和活力指数， 并利用隶属函数法对其耐锂性进行综合评价。【结果】 宁杞7号、宁农杞1号、宁农杞9号、14-401NM 和16-23-8-10的发芽率随着锂浓度的增加呈现先升高后下降的趋势，低浓度的锂对种子的萌发有促进作用，枸杞对锂有一定的耐性。14-4-4-16品种虽然不存在上述的变化趋势，但发芽率在任意浓度下都高于其他品种，且在高浓度下也保持着高的萌发率。综合评价各品种排名顺序为：14 401NM＞14-4-4-13＞16-23-8-10＞宁农杞2号＞宁农杞1号＞16-23-7-8＞宁农杞9号＞ 宁杞5号＞宁杞1号＞14-16＞宁杞7号。【结论】 14-401NM、14-4-4-13和16-23-8-10综合隶属排名较高，耐锂性相对较强。

Abstract:

【Objective】 To investigate the lithium tolerance of different Lycium chinense seeds.【Method】 The germination potential，germination rate，germination index，bud length，root length and vitality index of 11 L. barbarum seeds were studied by using LiCl solution to simulate lithium environment. The lithium tolerance was evaluated by membership function method.【Result】 The germination rates of Ningqi No. 7，Ningnongqi No. 1，Ningnon- gqi No. 9，14-401NM and 16-23-8-10 increased first and then decreased with the increase of concentration. Low concentration of lithium could promote seed germination，and L. barbarum had a certain tolerance to lithium. Although the 14-4-4-16 varieties did not have the above change trend，the germination rate was higher than that of other varieties at any concentration，and also maintained a high germination rate at high concentration. Therefore， through comprehensive evaluation，the ranking order was as follows： 14-401NM＞14-4-4-13＞16-23-8-10 ＞ Ningnongqi 2 ＞ Ningnongqi 1 ＞16-23-7-8＞ Ningnongqi 9 ＞ Ningqi 5 ＞ Ningqi 1 ＞14-16＞ Ningqi 7. 【Conclusion】 14-401NM，14-4-4-13 and 16-23-8-10 have higher comprehensive affiliations and relatively strong lithium resistance. This study can provide theoretical basis for the remediation of lithium polluted soil by L. barbarum.