摘要
以并头黄芩幼苗为试材,研究了不同质量浓度(10%、20%、30%)聚乙二醇6000(PEG-6000)溶液对并头黄芩5个生理指标的影响,以评价其抗旱能力。结果表明:质量浓度为20%、30%的PEG-6000分别胁迫20h后,并头黄芩失去观赏价值;叶片相对含水量和细胞膜透性与胁迫程度呈正相关,复水后30%PEG-6000处理下叶片含水量与细胞膜透性无法恢复正常水平;丙二醛含量随胁迫时间延长而积累,30%浓度PEG-6000在20h达到峰值,质膜受损伤程度最大;胁迫12h保护酶系统清除活性氧自由基抵抗干旱胁迫,超氧化物歧化酶(SOD)活性在12h达到峰值后不断下降,30%降幅最大,复水后难以恢复;并头黄芩通过自身调节能够适应质量浓度20%、30%的PEG-6000胁迫12～16h,有一定的抗旱能力。
Using seedling of Scutellaria scordifolia F.as materials,the effect of drought stress by different mass concentrations（10%,20% and 30%） of PEG-6000 on five physiological characteristics of Scutellaria scordifolia F.were studied,and its drought resitance was evaluated.The results showed that Scutellaria scordifolia lost ornamental value after 20 hours of stress by 20% and 30% PGE,respectively.Leaf relative water content and cell membrane permeability correlate with stress positively,that could not be restored to normal levers after again water.MDA content accumulated stress prolonging,that concentration of 30%PEG-6000 reached the top at 20 hours.Membrance suffered huge damage.At 12 hours the protective enzyme system to scaveng oxygen free radicals resist drought stress.SOD activity reached its peak in the 12 hours than declining.30% of PEG-6000 had the largest decline,it was difficult to recover after rewatering.The results showed that Scutellaria scordifolia had a strong ability to resist drought stress,and it was able to adapt to 16-20 hours of stress by 20% and 30%PEG-6000 through self-regulation.
出处
《北方园艺》
CAS
北大核心
2013年第12期65-68,共4页
Northern Horticulture
关键词
并头黄芩
PEG-6000
干旱胁迫
生理特性
seedling of Scutellaria scordifolia F.
PEG-6000
drought stress
physiological characteristics
