菊苣航天诱变新品系叶片旱生结构的比较研究  

Study on Anatomical Structures Related to Drought Resistance of Leaves of New Strains of Chicory Mutated in Space

作　　者：韩永芬[1,2] 卢欣石[1] 孟军江 王铁梅[1] 舒健虹 

机构地区：[1]北京林业大学林学院草业科学,北京100083 [2]贵州省草业研究所,贵州贵阳550006

出　　处：《中国草地学报》2011年第1期111-116,共6页Chinese Journal of Grassland

基　　金：贵州省创新能力建设项目(黔科合院所创能[2009]4013);贵州省农业攻关项目(黔科合NY字[2009]3083)

摘　　要：对15个菊苣空间诱变新品系叶片进行解剖,选取9项抗旱指标,采用单因素分析方法对各品系进行两两多重比较,得到各指标的灵敏度,以下表皮气孔密度和气孔长度、维管束厚度、叶片厚度4个指标为主进行聚类分析。结果表明不同菊苣新品系叶片的抗旱性解剖结构除表皮厚外差异均达极显著水平。各指标的灵敏度大小依次为:下表皮气孔密度>下表皮气孔长度>上表皮气孔长度>上表皮气孔密度>维管束>叶片厚度、叶脉厚度>下、上表皮厚度。聚类分析结果表明,15个菊苣新品系可聚为3个级别:其中PA-95、PA-96、PA-11、PA-93、PA-49、PA-20、PA-82、PA-42具有较好的抗旱性结构;PA-36、PA-31、PA-57、PA-186、PA-54、PA-26抗旱性结构中等;PA-43的抗旱性结构较差。The anatomical structures related to drought resistance of the leaves of 15 new chicory strains by space mutagenesis were studied based on 9 xeromorphic indexes,the single factor multiple comparison was done between two strains in order to conclude the sensitiveness sequence of the 9 indexes to the drought,and the clustering analysis was conducted based on four most sensitive indexes including the stoma density on lower epidermis,the stoma length,the thickness of bundle,the thickness of leaves.The results showed that there was highly significant difference between the strains.The sequence of the sensitivity was as follows： lower epidermis stoma density lower epidermis stoma length upper epidermis stoma length upper epidermis stoma density bundle thickness leaf thickness,midrib thickness upper and lower epidermis thickness.And according to clustering analysis,the 15 strains could be divided into three classes in terms of the ability of the leaves structures against the drought：PA-95,PA-96,PA-11,PA-93,PA-49,PA-20,PA-82,PA-42 were the best,while PA-43 were the worst,and PA-36,PA-31,PA-57,PA-186,PA-54 and PA-26 were between them.The leaves of the different new strains had the different anatomical structures related to drought resistance.

关 键 词：菊苣新品系 叶片 解剖结构 抗旱性 

分 类 号：Q944.56[生物学—植物学]