干旱地区农业研究2017，Vol.35Issue(5)：229-235,7.DOI:10.7606/j.issn.1000-7601.2017.05.34
PEG模拟水分胁迫下白菜型冬油菜芽期根系特征及抗旱性研究
Research on root morphology characteristics and drought resistance of winter rapeseed (Brassica campestris L.) at bud stage under PEG simulated drought
摘要
Abstract
This study use(d) sand culture,with 18％ (w/V) polyethylene glycol (PEG6000) to simulate water stress on root morphology characteristic of 18 germinating winter rapeseed,combined with pot experiment studied the root characteristics and drought resistance.The results showed that water stress had a significant inhibitory effect on root number,root weight and root/shoot ratio of winter rapeseed,and had little effect on root length.The correlation analysis demonstrated that there was a significant positive correlation between the relative root number,the relative root length and the relative vigor index,and the results could be used as an assistant index for drought resistance evaluation of winter rapeseed.Drought resistance of materials cluster analysis showed that 18 materials can be divided into five groups at a distance of 10,where are the strongest drought resistance class A,the average relative lateral root number,average relative root length,average relative root weight,the average relative shoot ratio,and the average relative vigor index is 72.90％,100.37％,79.60％,119.93 and 0.64.Depending on the relative vigor index and cluster analysis,the 3 winter rapeseed (which are Ningyou 2,Longyou 7 and Pingyou 1) were identified as drought resistance.The results of the pot experiment showed that there was a significant positive correlation between the dry weight of total biomass and root/shoot ratio,root dry weight,dry weight and root length of shoots at bud stage under PEG simulated drought resistance,and the higher the early growth vigor,the stronger the growth potential.Therefore,the PEG simulated drought method can be uesed to filter the drought-resistant materials.关键词
白菜型冬油菜/PEG/抗旱性/根系特征Key words
winter rapeseed(Brassica campestris L.)/PEG/drought resistance/root characteristic分类
农业科技引用本文复制引用
米超,赵艳宁,刘自刚,孙万仓,刘海卿,方彦,李学才,武军燕..PEG模拟水分胁迫下白菜型冬油菜芽期根系特征及抗旱性研究[J].干旱地区农业研究,2017,35(5):229-235,7.基金项目
国家现代农业产业技术体系(CARS-13) （CARS-13）
国家自然基金(31460356) （31460356）
国家“973”计划(2015CB150206) （2015CB150206）
国家自然基金(31660404) （31660404）
油菜杂种优势利用技术与强优势杂交种创制(2016YFD0101300) （2016YFD0101300）
