摘要
以青芋1号、青芋2号菊芋幼苗为实验材料,采用PEG-6000人工模拟干旱胁迫环境,设4个胁迫强度处理(0%、10%、20%、30%),4个胁迫持续时间(12h、24h、36h、48h),研究干旱胁迫下菊芋幼苗叶片、茎段、根中果聚糖含量变化;结果表明:青芋1号、青芋2号两个菊芋品种在不同浓度的PEG模拟干旱胁迫下,果聚糖对干旱胁迫的响应首先出现在茎部,均在胁迫的12h时即出现了显著变化;叶和根均在24h时对胁迫产生显著感应,其中两个菊芋品种的叶中果聚糖含量均在胁迫浓度为30%、胁迫24h时出现显著变化;在不同浓度胁迫下,菊芋各部位(叶、茎、根)果聚糖含量整体呈现缓慢下降趋势,青芋1号、青芋2号菊芋均在20%PEG胁迫下24h时达到其干旱响应阈值。
Qingyu 1 and Qingyu2 Jerusalem artichoke seedlings as experimental material,the PEG- 6000 artificial simulated drought stress environment,set up four stress intensity treatment（ 0%,10%,20%,30%）,four stress duration（ 12 h,24h,36 h,48h）,study on the Jerusalem artichoke seedling leaves under drought stress,in roots and stems fructan content; the results showed that Qingyu1,Qingyu2 two Jerusalem artichoke varieties under drought stress at different concentrations of PEG,fructan response to drought stress first appeared in the stems,when 12 h had significant changes; Leafs and roots were significant induction of stress during 24 h,the leaves of two varieties of Jerusalem artichoke leaves are in stress concentration was 30%,there was a significant change stress 24h; Under the stress of different concentration and different parts of Jerusalem artichoke（ leaf,stem,root）,the overall decline,albeit slowly,fructan content Qingyu1,Qingyu2 during 24 h under 20% PEG stress reached to the drought response threshold.
出处
《内蒙古农业大学学报（自然科学版）》
CAS
北大核心
2014年第4期30-34,共5页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
农业部“948”项目(2013-Z72)
青海省科技厅应用基础研究项目(2012-H-809)
关键词
菊芋
PEG胁迫
果聚糖代谢
Helianthus tuberosus Linn.
PEG stress
fructan metabolic
