甘肃河西地区典型沙生植物叶绿素和脯氨酸累积研究  

Proline and Chlorophyll Content in Leaves of Typical Sand Plants in the Hexi Region of Gansu Province

作　　者：李亚[1] 魏怀东 陈芳[1] 周兰萍[1] 胡小柯[1] 丁峰[1] 张勃[2] LI Ya;WEI Huai-dong;CHEN Fang;ZHOU Lan-ping;HU Xiao-ke;DING Feng;ZHANG Bo(Gansu Desert Control Research Institute, Lanzhou, Gansu 730070, China;Geography and Environmental Sciences, Northwest Normal University ,Lanzhou,Gansu,730070 ,China)

机构地区：[1]甘肃省治沙研究所,甘肃兰州730070 [2]西北师范大学地理与环境学院,甘肃兰州730070

出　　处：《西北林学院学报》2018年第3期27-32,73,共7页Journal of Northwest Forestry University

基　　金：国家自然科学基金(31360204;41661008);甘肃省自然科学基金(1506RJZA137);甘肃省基础研究创新群体(145RJIA335)

摘　　要：甘肃河西地区恶劣的自然条件严重限制了植物的正常生长,植物在受到逆境胁迫时会在生理生化方面作出快速响应。通过分析河西地区典型沙生植物叶绿素和脯氨酸含量,了解其在干旱环境下的适应特征。结果表明,植物叶绿素的含量随着叶片形状的改变发生相应的变化,河西地区63种典型荒漠植物叶绿素含量0.25~1.65mg·g^(-1),其中卷叶类植物叶绿素含量最高,其次为薄叶,多浆和肉茎均较低,卷叶类与其他3类的差异极显著(P<0.01);同一叶片类型不同植物间的差异较小。相反,脯氨酸的含量与叶片形状的改变没有太大关系,同一叶片类型不同植物间脯氨酸含量差异很大,同一属不同种间脯氨酸含量差异也非常大,河西地区63种典型荒漠植物脯氨酸含量为1.54~3 704.10μg·g^(-1),其中白刺和泡泡刺的脯氨酸含量明显高于其他植物,分别达到3 704.10μg·g^(-1)和1 955.39μg·g^(-1),脯氨酸含量相对较高的植物还有红砂、多枝柽柳、荒漠锦鸡儿、霸王、中麻黄、木贼麻黄、骆驼蓬、沙枣等。研究结果为荒漠植物抗逆评价指标体系的建立和抗逆植物的选择提供基础。The adverse natural conditions in Gansu Corridor significantly inhibit the normal growth of plants.The plants that were in adversity stress will quickly response the environment both physiologically and biochemically.This study analyzed the proline and chlorophyll contents in leaves of 63 typical sand plants in Gansu Corridor to understand the adaptation characteristics of the plants in arid environment.The results showed that the chlorophyll content changed with the change of leaf shape,ranged from 0.25 to 1.65 mg·g^（-1） among 63 typical sand plants,high in roll leaf plants,low in thin leaf,succulent,and succulent stem plants with extremely significant differences（P〈0.01）.Among different species of the same leavf types,the differences were not significant.On the contrary,there was no correlationship between the proline content and leaf shape,and significant differences in proline content were observed among different species with the same leaf type,also the proline content in different species of same genera was significantly different with the range of 1.54-3 704.10μg·g^（-1）.The highest of proline content was found in Nitraria tangutorum（3 704.10μg·g^（-1））,followed by Nitraria sphaerocarpa（1 955.39μg·g^（-1））.the proline contents in these two species were significantly higher than the other species.Relatively higher proline con-tents were also found in the plants such as Reaumuria songarica,Tamarix ramosissima,Caragana roborovskyi,Zygophllum xanthoxylon,Ephedra intermedia etc.The resulte would provide basic references for building evaluation index system and selecting adverse-resistant plants.

关 键 词：沙生植物 叶片变形 叶绿素 脯氨酸 适应策略 

分 类 号：Q945.1[生物学—植物学]