4种盐生植物抗盐能力的综合评价

Comprehensive Evaluation of Salt-resistance Traits in Four Halophytes

比较柽柳、白刺、芨芨草和黄花补血草等宁夏常见的四种盐生植物抗盐能力大小,为宁夏盐碱地适地适树提供依据。在常规生理指标测定基础上,利用隶属函数法评价对四种盐生植物进行综合评价。结果表明,在不同浓度NaCl胁迫下,测定叶绿素含量随胁迫程度增强而呈降低的趋势,丙二醛含量、脯氨酸含量随胁迫增强呈升高的趋势、SOD、POD和CAT酶活性等与抗盐密切相关的生理指标,在此基础上计算四种植物隶属函数值。隶属函数法对材料进行了抗盐性综合评价,得出四种植物抗盐能力依次为:白刺>甘肃柽柳>黄花补血草>芨芨草。

The study was conducted with four halophytes with different sah-sistanee under NaCl conditions, In order to offer basic theory for matching species with the site. On the base of determined indexes, they have been used by the subordinate function analyse and gotten the subordinate function value of different sah-sistanee varieties. 6 physiologieal indexes closely related to the salt resistance eharaeteristies were measured, such as chlorophyll content, MDA content, proline content, SOD activity, CAT activity and POD activity. And a comprehensive evaluation on salt resistance of four plants was given based on subordinate function values analysis. According to the subordinate function value of different halophytes, it could be known that the degree of salt tolerance as follows： Tamarix chinensis〉Nitraria scbobeff 〉Limonium aureum〉Achnatherum splendens.