园林植物桂花叶片矿质元素及生理特征对冬季异常低温的响应  

Response of Mineral Elements and Physiological Characteristics in Garden Plants Osmanthus Fragrans Lour Leaves to Unusual Low Temperature in Winter

作　　者：徐广平[1] 何成新[1] 李先琨[1] 邱正强 黄玉清[1] 姚月锋[1] 孙英杰[1] 潘复静[1] 

机构地区：[1]广西壮族自治区中国科学院广西植物研究所,广西桂林541006 [2]河北建筑工程技术学院,河北张家口07500

出　　处：《核农学报》2013年第3期365-372,共8页Journal of Nuclear Agricultural Sciences

基　　金：中国科学院"西部之光"人才培养计划资助项目[科发人教字(2011)180号];广西植物研究所基本业务费(桂植业11004);岩溶动力学重点实验室基金资助项目(KDL2011-09);国家科技支撑计划(2012BAC16B02);广西科技攻关计划(桂科攻1298006-1)

摘　　要：以南方常绿园林观赏植物桂花为研究对象,在自然异常低温下,测定了桂花叶片矿质元素、叶片相对含水量、叶绿素以及超氧化物歧化酶、过氧化物酶、可溶性蛋白、可溶性糖、脯氨酸和丙二醛生理指标的变化,探讨桂花叶片对冬季异常低温的响应。结果表明,异常低温下,桂花叶片矿质元素含量并不是全部急剧下降,元素C、Ca、Mn、Zn、Cu和Ni含量表现为逐渐减小,而N、P、Na、Mg、K和Fe含量则表现为先增大后减小。相对含水量、叶绿素a、叶绿素b、叶绿素a+b、可溶性蛋白和脯氨酸一致表现了逐渐减小的趋势;超氧化物歧化酶、可溶性糖和过氧化物酶表现出先增大,后减小的变化趋势;丙二醛则表现为先减小,后增大的大小关系。桂花叶片对异常低温有较高的抗逆性,桂花叶片衰老程度并不严重,受害程度相对较轻,保持了一定的矿质元素含量,桂花叶片通过矿质元素含量与生理指标的相互协调,对冬季异常低温有一定的适应性。In this paper,Osmanthus fragrans Lour,one of the southern evergreen landscape plants was employed to investigate the adaptability on leaves to unusual low temperature in winter.The physiological and biochemical indexes,including mineral elements,leaf relative water content,chlorophyll,superoxide dismutase,streptavidin peroxidase,soluble protein,proline and malondialdehyde in leaves were determined in the Guilin Arboretum.Results showed that no sharp decline in nutrient elements of Osmanthus fragrans Lour leaves was observed under abnormal low temperature.The contents of C,Ca,Mn,Zn,Cu and Ni showed a decreased trend as well as RWC,chlorophyll a,chlorophyll b,chlorophyll a＋b,SP and Pro.The contents of N,P,Na,Mg,K and Fe firstly increased and then decreased,and SOD,WSS and POD followed the same way.However,MDA first decreased and then increased.Leaf senescence was not serious after abnormal low temperature.Meanwhile,there were a lot of nutrient elements in Osmanthus fragrans Lour leaves.The good intercoordination between content of nutrient elements and physiological characteristics indicated better adaptability to abnormal low temperature in winter.

关 键 词：桂花 矿质元素 异常低温 生理特征 

分 类 号：S685.13[农业科学—观赏园艺]