河南农业大学学报2018，Vol.52Issue(3)：313-321,9.
PEG模拟水分胁迫对白菜型冬油菜幼苗生长及生长特性的影响
Response of winter rapessed seeding growth and physiological characteristics under PEG drought tolerance
摘要
Abstract
Different mass fractions of polyethylene glycol 6000(PEG6000)solution were used to simulate the water stress.The morphological characteristics and physiological and biochemical characteristics of four B.campestris were studied and the drought resistance of different varieties was evaluated.The results showed that PEG had a significant inhibitory effect on seedling rate,main root length,seedling height,fresh weight per plant,and relative vigor index of four kinds of winter campestris.At 5％to 15％PEG mass fraction,there was a positive correlation between superoxide dismutase(SOD)activity,peroxidase(POD)activity,catalase(CAT)activity and stress mass fraction,while at a mass fraction of 15％to 20％,the enzyme activity peaked,reaching a significant level(P≤0.05),followed by a decrease.There was a significant positive correlation between soluble sugar(SS)content,soluble protein(SPr)content,proline content,relative conductivity,malondialdehyde(MDA)content and stress mass fraction.Linear regression analysis showed that the semi-lethal mass fraction(LC50)of PEG stress was 18.2％and the EC of LC50 was 15.73％.The order of drought resistance of the four varieties was as follows: Longyou 6＞ Longyou 7 ＞Tianyou 7≥Tianyou 5.关键词
水分胁迫/白菜型冬油菜/形态特征/生理生化特征/半致死浓度Key words
drought resistance/winter B.campestris/morphological characteristics/physiological and biochemical characteristics/half lethal concentration分类
农业科技引用本文复制引用
董小云,米超,刘自刚,孙万仓,武军艳,方彦,李学才,赵艳宁,刘海卿..PEG模拟水分胁迫对白菜型冬油菜幼苗生长及生长特性的影响[J].河南农业大学学报,2018,52(3):313-321,9.基金项目
国家现代农业产业技术体系(CARS-12) （CARS-12）
国家自然科学基金项目(31460356) （31460356）
国家"973"计划(2015CB150206) （2015CB150206）
国家863计划(2011AA10A104) （2011AA10A104）
国家农业科技成果转化项目(2014G10000317) （2014G10000317）
丝绸之路经济带新疆核心区农田周年覆盖高效种植模式研究与示范项目(2016E02009) （2016E02009）
