中国油料作物学报Issue(3)：310-315,6.DOI:10.7505/j.issn.1007-9084.2015.03.008
苗期喷施外源脱落酸对北方白菜型冬油菜越冬生理的影响
Exogenous ABA effect on physiology of winter rapeseed(Brassica rapa L.)seedling in northern China
摘要
Abstract
To improve cold tolerance of winter rapeseed(Brassica rapa L. )in northern China,hormone effect of exogenous abscisic acid(ABA)was investigated on cultivar Longyou 8. ABA(5,10,15,20,25mg / L)were sprayed on leaves from 6 - 7 true - leaf seedlings. Cold tolerance,physiology and biochemistry characteristics were studied before winter(at 15℃)and during winter(at - 5℃). Results showed that ABA spray significantly im-proved overwintering rate. The overwintering rate was 86. 3% under 20mg / L ABA,which was the highest among other treatments,and was 26. 7% higher than water spray(CK). After spray,leaves protective enzymes(SOD, POD,CAT)were activated significantly. Contents of soluble protein(SP),soluble sugar(SS)and free proline (Pro)were significantly increased. Malonaldehyde(MDA)content was significantly reduced. Root vitality and lat-eral roots were significantly increased. Root collar diameter and root weight increased too,but the increase was not significant different from water control. Result showed that 20mg / L ABA spray was the best concentration to im-prove the cold tolerance of Longyou 8. It was benefited by the increase of protective enzyme activity and osmotic up- regulation from the aerial part. Thus the increase of root vitality and lateral root quantity proved a well condition for the seedling to overcome the chilling.关键词
白菜型油菜/冬油菜/ABA/浓度/抗寒性Key words
Brassica rapa/Winter rape/ABA/Concentration/Cold resistance分类
农业科技引用本文复制引用
武军艳,马骊,张树娟,王凯音,刘海卿,孙万仓,刘自刚,杨建胜,李学才,方彦,钱武,侯献飞..苗期喷施外源脱落酸对北方白菜型冬油菜越冬生理的影响[J].中国油料作物学报,2015,(3):310-315,6.基金项目
校创基金（GSAU - STS -1328）；国家现代农业产业技术体系建设专项（CARS -13）；国家863计划（2011AA10A104）；国家自然科学基金（31460356）；国家973计划（2015CB150206）；国家农业科技成果转化项目 （）
