摘要
对甘肃省陇南市主栽的6个油橄榄品种幼苗进行不同程度的干旱胁迫处理,探索油橄榄的渗透调节作用与抗氧化能力。结果表明:随干旱程度的加剧,叶片相对电导率逐渐升高,叶绿素含量呈不同程度降低,丙二醛含量呈先升后降的趋势。对比实验所选的6个品种可知,皮肖利、佛奥受害程度较重,而莱星和鄂植8号受害程度较轻,配多灵和阿斯受害程度居中。随干旱胁迫的加剧,油橄榄叶片渗透调节物质含量基本呈现升高趋势,其中可溶性糖含量总体呈不同程度的上升;脯氨酸含量基本呈先升后降的趋势;叶片可溶性蛋白质含量除佛奥和皮肖利有所下降外,其余品种均呈不同程度的升高趋势;莱星和鄂植8号叶片渗透调节物质含量增幅相对较高,皮肖利、佛奥渗透调节物质含量增幅相对较低。6个品种叶片抗氧化酶SOD、POD和CAT活性整体上均表现为随干旱胁迫加剧呈先升后降的变化趋势,莱星和鄂植8号抗氧化能力相对较强,而皮肖利、佛奥较差。采用隶属函数法进行综合分析,得出陇南6个油橄榄主栽品种抗旱能力大小排序为:莱星>鄂植8号>配多灵>阿斯>佛奥>皮肖利,可见莱星、鄂植8号抗旱性相对较强,配多灵居中,皮肖利和佛奥较差。
Wudu district of Longnan city, Gansu province is one of the best adaptive areas in China. Different levels of drought stress were imposed on 6 olive varieties seedlings which planted at Longnan, the osmotic adjustment and antioxidant ability were measured. The results indicated that, with the drought worsening, the leaf relative conductivity increased gradually, chlorophyll contents decreased with different degrees, while malondialdehyde（MDA） content increased first and then decreased. Picholine and Frantoio suffered more seriously, while Leccino and Ezhi8 suffered more lightly. The osmotic adjustment substances contents increased basically as drought worsened.The soluble sugar contents generally increased with different degrees, the proline contents increased first and then decreased, the soluble protein contents increased with different degrees except Picholine and Frantoio decreased.Leccino and Ezhi 8 relative increased more in osmotic adjustment substances, while Picholine and Frantoio increased less. The activities of antioxidant enzyme of the 6 olive varieties generally increased first and then decreased with the drought worsening. The antioxidant ability of Leccino and Ezhi 8 were stronger, while that of Picholine and Frantoio were lower. Through subordinate function analysis, the average degree of membership, as the comprehensive evaluation value of drought hardiness were obtained, which showed the sequence of drought resistance of the 6varieties was： Leccino ﹥ Ezhi 8 ﹥ Pendolino ﹥ Ascolano Tenera ﹥ Frantoio ﹥ Picholine. Leccino and Ezhi 8 showed the highest drought resistance, Pendolino in the middle, Frantoio and Picholine showed the lowest.
出处
《热带作物学报》
CSCD
北大核心
2017年第9期1620-1627,共8页
Chinese Journal of Tropical Crops
基金
国家自然科学基金(No.31660223)
甘肃省农牧厅项目(No.GNSW-2016-28)
秦巴山片区(甘肃)精准扶贫富民产业培育及示范项目
关键词
油橄榄
干旱胁迫
渗透调节
抗氧化酶活性
隶属函数分析
抗旱性综合评价
Olea europaea
drought stress
osmotic adjustment
activity of antioxidant enzyme
subordinate function analysis
drought hardiness comprehensive evaluation
