番茄砧木苗期耐旱性鉴定评价  

Identification and evaluation of tomato rootstock seedlings for drought tolerance

作　　者：张志焕[1] 韩敏[1] 张逸[1] 王允[1] 徐坤[1] 

机构地区：[1]山东农业大学园艺科学与工程学院山东果蔬优质高效生产协同创新中心/农业部黄淮地区园艺作物生物学与种质创制重点实验室,山东泰安271018

出　　处：《生态学杂志》2016年第3期719-725,共7页Chinese Journal of Ecology

基　　金：山东省现代农业产业技术创新体系项目(SDAIT-02-022-05)资助

摘　　要：为探讨番茄砧木耐旱性鉴定的便捷指标,筛选耐旱材料,以32份番茄砧木为试材,研究其幼苗在土壤脱水前后根、茎、叶鲜重、叶片水势和根系活力的变化,并通过综合比较分析,对番茄砧木品种耐旱性进行评价。结果表明:随土壤脱水胁迫天数的增加,番茄砧木幼苗旱害指数显著增加,但变异系数则显著降低,复水过程则相反;旱害指数回归模型中仅脱水前根鲜重、叶片水势和脱水后根鲜重相对增加值3个因子入选;通过对模型变量因子分别进行系统聚类分析,均可将供试番茄砧木材料分成3类,且除脱水后根鲜重相对增加值外,其他因子聚类结果一致,据此确定了脱水前幼苗根鲜重、叶片水势可作为鉴定番茄耐旱性的便捷指标,进而筛选出"砧木606"、"Anka-T"、"060813"、"0301112"等为耐旱番茄砧木材料。In order to obtain the indexes which can be conveniently used to identify the drought tolerance of tomato rootstocks and to screen out tomato rootstocks with strong drought tolerance from thirty-two tomato rootstocks,we measured the changes of root fresh weight,stem fresh weight,leaf fresh weight,leaf water potential,root activity both before and after soil dehydration treatment,then evaluated the drought tolerance of tomato rootstock seedlings through comprehensive comparative analysis. It was found that,with increasing the duration of soil dehydration,the average value of drought damage index of tomato rootstock seedlings increased,while the coefficient of variation of drought damage index decreased. However,after the seedlings were watered,the changes were opposite. In the regression model of drought damage indexes,only root fresh weight,leaf water potential before soil dehydration treatment and the relative increment value of root fresh weight were selected. Tomato rootstocks could be divided into three classes by clustering analysis based on each of all variable factors of the model. With the exception of the relative increment value of root fresh weight,the other factors had same results on the grouping. So root fresh weight and leaf water potential of seedlings before soil dehydration treatment could be used as convenient indicators identifying tomato drought tolerance,and 606,Anka-T,060813 and0301112 were screened out as drought-tolerant rootstocks of tomato.

关 键 词：番茄砧木 生长量 叶片水势 旱害指数 聚类分析 

分 类 号：S641.2[农业科学—蔬菜学]