摘要
以4份黄瓜品系为试验材料,通过测定不同弱光处理下叶片叶绿素含量随时间变化的情况,探索黄瓜苗期耐弱光性鉴定的最适宜光照强度与最佳鉴定时期,同时对黄瓜苗期耐弱光性进行鉴定,并对黄瓜苗期的叶片叶绿素含量降低率与成株期的产量降低率、植株干质量降低率进行相关性分析,探究黄瓜苗期与成株期耐弱光性的相关性。结果表明:20mol·m^(-2)·s^(-1)弱光胁迫20d的幼苗叶片叶绿素含量降低率可以作为黄瓜苗期耐弱光筛选的快速鉴定指标。成株期产量的降低率与植株干质量的降低率均能反映成株期品种间耐弱光性的差异。苗期叶片叶绿素含量降低率与成株期的产量降低率呈显著正相关,不同品种在苗期和成株期的耐弱光性表现一致。W_(25)的耐弱光性较强,W_5的耐弱光性较差。
Taking 4 different cucumber varieties as material,this study tested chlorophyll content changesin cucumber leaves under different low light treatments,explored the most appropriate light intensity and bestappraisal period for low light tolerance identification during cucumber seedling stage,and at the same time,the low light tolerance identification was conducted. Beside,this paper analyzed the reduction rate of leaveschlorophyll content during cucumber seedling stage,and the reduction rate of fruit yield in adult stage,andalso the reduction ratio of plant dry weight. The paper explored the correlation between cucumber tolerance tolow light in seedling stage and adult plant stage. The results showed that the reduction rate of leaves chlorophyllcontent during seedling stage under 20 mol·m-2·s-1 light stress at 20 days could be used as indicator for rapididentification of low light tolerance. The reduction rates of both fruit yield in adult stage and plant dry weight couldreflect the differences in low light tolerance between varieties during adult stage. There existed a significant positivecorrelation between leaves chlorophyll content reduction rate in seedling stage and fruit yield reduction rate in adultstage. Low light tolerance in seedling and adult stages of different varieties was the same. W25 had strong toleranceto low light,and W5 had poor tolerance to low light.
出处
《中国蔬菜》
北大核心
2016年第8期35-39,共5页
China Vegetables
基金
"十二五"国家科技支撑计划项目(2012BAD02B03)
黑龙江省应用技术研究与开发计划重大项目(GA15B103)
关键词
黄瓜
耐弱光性
鉴定指标
苗期
成株期
相关性
Cucumber
Low light tolerance
Identification Index
Seeding stage
Adult stage
Correlation
