摘要
【目的】胡颓子属植物的耐盐特性在近年来受到了广泛关注。【方法】以栽植于江苏盐城大丰盐碱地的胡颓子(Elaeagnus pungens)和埃比速生胡颓子(Elaeagnus×ebbingei)的杂交后代为研究对象,探究其种子特征以及对盐胁迫的响应。【结果】(1)杂交后代的种子为黄褐色、椭圆球状具肋,氨基酸总量达1.81%,矿质元素含量丰富,以K含量最高。种子出芽率与播种季节关系密切,5月份播种的出芽率可达80.3%。(2)2018年至2020年收集的果肉可食率为71.89%~77.34%。除2018年外,果实的糖酸比均在5以上,且不同矿质元素的含量均未超过国家对食品中重金属的限量卫生标准。(3)盐胁迫试验显示,随着NaCl含量的增加,种子中渗透调节物质的含量以及抗氧化酶系统的活性呈现出不同的变化。Na^(+)、K^(+)含量在叶片和果实组织中也不同,新叶和种子的K^(+)/Na^(+)比值高于成熟叶和果肉。【结论】杂交后代通过不同渗透调节物质和抗氧化酶系统的协同作用以及对不同元素的选择性吸收和运输维持种子在盐胁迫环境下的功能和品质。
[Objective]This study aims to explore the characteristics of salt tolerance of genus Elaeagnus plants[.Method]In this study,the hybrid offspring of E.pungens and Elaeagnus×ebbingei planted in the saline-alkali land of Yancheng City,Jiangsu Province was collected to explore their seed characteristics and responses to salt stress.[Result](1)The seeds are yellowish-brown,oval-shaped,and ribbed,with a total amino acid content of 1.81%.They are rich in minerals,especially potassium.The germination rate of seeds is closely related to the sowing season,which in May can reach 80.3%(.2)The edible rate of the pulp collected from 2018 to 2020 ranged from 71.89%to 77.34%.Except for 2018,the sugar-acid ratio of the fruits was all above 5,and none of the contents of mineral elements exceeded the national hygiene standards for the limits of heavy metals in food.(3)The gradient salt stress test showed that with the increase of NaCl concentration,the content of osmotic regulatory substances and the activity of the antioxidant enzyme system in seeds changed differently.The contents of Na^(+) and K^(+) contents in leaf and fruit tissues were also different.The K^(+)/Na^(+) ratio in young leaves and seeds is higher than that in mature leaves and pulp.[Conclusion]These combined results indicated that the hybrid offspring maintains the function and quality of seeds under salt stress through the synergistic effect of different osmotic regulatory substances and antioxidant enzyme systems,as well as the selective absorption and transport of different elements.
作者
李乃伟
徐裕玲
陈红
吴宝成
王忠
庄维兵
王涛
LI Naiwei;XU Yuling;CHEN Hong;WU Baocheng;WANG Zhong;ZHUANG Weibing;WANG Tao(Jiangsu Key Laboratory for Conservation and Utilization of Plant Resources,Institute of Botany,Jiangsu Province and Chinese Academy of Sciences(Nanjing Botanical Garden Mem.Sun Yat-Sen),Nanjing 210014,China)
出处
《江西农业大学学报》
北大核心
2026年第1期83-92,共10页
Acta Agriculturae Universitatis Jiangxiensis
基金
江苏省林业科技创新与推广项目(LYKJ[2025]06)
江苏省海洋科技创新专项(HY2018-5)。
关键词
胡颓子属
杂交后代
种子特征
耐盐性
genus Elaeagnus
hybrid offspring
seed characteristics
salt tolerance
