大果榉和榆树对深秋低温的生理反应
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摘要
以深秋大果榉和榆树的叶片为试验材料,研究低温环境下叶片内部叶绿素含量、质膜相对透性、丙二醛含量及可溶性蛋白含量的差异和动态变化情况,为探明深秋大果榉和榆树对低温的生理响应机制以及为园林绿化树种选择、保护提供理论依据。结果表明,随着低温胁迫程度的加深,大果榉叶片叶绿素含量持续下降,榆树叶片叶绿素含量先增加后降低;相同时间内大果榉的丙二醛含量和质膜相对透性均高于榆树,呈现出不断上升趋势,且二者间差异显著;大果榉的可溶性蛋白含量持续增加,而榆树的可溶性蛋白含量先上升后下降,在相同低温条件下大果榉的可溶性蛋白含量均低于榆树,且差异显著。大果榉和榆树对深秋低温的生理响应差异显著,且大果榉的耐寒能力较榆树弱,故在园林绿化中应采取合理的抗寒措施。
To explore the physiological responses mechanism of Zelkova sinica and Ulmus pumila to low temperature in late autumn,and to provide theoretical basis for the selection and protection of tree species in landscaping, the chlorophyll content, relative membrane permeability, MDA content and soluble protein content in the leaves of Zelkova sinica and Ulmus pumila were studied at low temperature. The results showed that with the deepening of low temperature stress, the chlorophyll content in Zelkova sinica continued to decrease, and chlorophyll content in Ulmus pumila increased firstly and then decreased. MDA content and the relative permeability membrane of Zelkova sinica were higher than Ulmus pumila with an increasing trend in the same period, and the difference between them was significant. The content of soluble protein in Zelkova sinica increased continuously, Ulmus pumila first went up and then went down, the content of soluble protein in Zelkova sinica was lower than Ulmus pumila under the same low temperature environment,and the differences were significant. The physiological response of Zelkova sinica and Ulmus pumila to low temperature in late autumn is significantly different, and the cold tolerance of Zelkova sinica is weaker than Ulmus pumila. Therefore, reasonable measures should be taken to resist cold in the landscaping.
To explore the physiological responses mechanism of Zelkova sinica and Ulmus pumila to low temperature in late autumn,and to provide theoretical basis for the selection and protection of tree species in landscaping, the chlorophyll content, relative membrane permeability, MDA content and soluble protein content in the leaves of Zelkova sinica and Ulmus pumila were studied at low temperature. The results showed that with the deepening of low temperature stress, the chlorophyll content in Zelkova sinica continued to decrease, and chlorophyll content in Ulmus pumila increased firstly and then decreased. MDA content and the relative permeability membrane of Zelkova sinica were higher than Ulmus pumila with an increasing trend in the same period, and the difference between them was significant. The content of soluble protein in Zelkova sinica increased continuously, Ulmus pumila first went up and then went down, the content of soluble protein in Zelkova sinica was lower than Ulmus pumila under the same low temperature environment,and the differences were significant. The physiological response of Zelkova sinica and Ulmus pumila to low temperature in late autumn is significantly different, and the cold tolerance of Zelkova sinica is weaker than Ulmus pumila. Therefore, reasonable measures should be taken to resist cold in the landscaping.
引文
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[19]石如意,王腾飞,李军,等.低温胁迫下外源ABA对玉米幼苗抗寒性的影响[J].华北农学报,2018,33(3):136-143.
[2]乔虹,王雪珂,白晋华,等.基质种类对大果榉硬枝扦插生根的影响[J].山西农业科学,2018,46(12):2037-2039.
[3]乔虹,白晋华,张芸香,等.珍稀乡土树种大果榉研究现状与展望[J].山西农业科学,2018,46(8):1421-1424,1428.
[4]张若晨,陈莲芸,王良民.珍稀乡土树种大果榉在国土绿化中的应用[J].山西林业科技,2010,39(1):38-41.
[5]金雅琴,崔梦凡,黄琳曦,等.榆属植物资源培育及其在城市园林建设中的应用[J].金陵科技学院学报,2018,34(2):79-83.
[6]臧德奎,徐晖春.中国景观植物应用大全(木本卷)[M].北京:中国林业出版社,2015.
[7]陈杰中,徐春香.植物冷害及其抗冷生理[J].福建果树,1998(2):21-23.
[8]蔡庆生.植物生理学[M].北京:中国农业大学出版社,2011:80-82.
[9]沈漫,王明庥,黄敏仁.植物抗寒机理研究进展[J].植物学通报,1997,14(2):1-8.
[10]黄承玲,赵孝梨,刘广超. 3种高山杜鹃对低温的生理响应[J].西南农业学报,2016,29(10):2346-2350.
[11]张鸽香.瓜叶菊对低温胁迫的生理反应[J].南京林业大学学报,2004,28(5):89-92.
[12]邓菊庆,蹇洪英,李淑斌,等.几种云南特有蔷薇资源的抗寒性研究[J].西南农业学报,2013,26(2):723-727.
[13]郭延平,张良诚,沈允钢.低温胁迫对温州蜜柑光合作用的影响[J].园艺学报,1998,25(2):111-116.
[14]刘慧民,王昆,李奇石.五叶地锦低温处理条件下与抗寒相关的部分生理生化指标的变化规律[J].东北林业大学学报,2003,31(4):74-75.
[15]李合生,孙群,赵世杰.植物生理生化实验原理和技术[M].北京:高等教育出版社,2000:196-197.
[16]王芳,刘鹏,朱靖文.镁对大豆根系活力叶绿素含量和膜透性的影响[J].农业环境科学学报,2004,23(2):235-239.
[17]邹奇.植物生理学实验指导[M].北京:中国农业出版社,2000.
[18]缴丽莉,路丙社,白志英,等.四种园林树木抗寒性的比较分析[J].园艺学报,2006,33(3):667-670.
[19]石如意,王腾飞,李军,等.低温胁迫下外源ABA对玉米幼苗抗寒性的影响[J].华北农学报,2018,33(3):136-143.
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