摘要
为了解西鄂尔多斯地区濒危孑遗植物对干旱环境的适应性,本研究采用石蜡切片法,观察研究4种孑遗植物叶片解剖结构。结果显示:相同生境下4种植物叶片结构存在较大差异。四合木(Tetraena mongolica)叶片解剖呈半月形,沙冬青(Ammopiptanthus mongolicus)叶片解剖呈扁平状,鄂尔多斯半日花(Helianthemum ordosicum)叶片正常状态下卷曲,霸王(Sarcozygium xanthoxylon)叶片解剖呈椭圆状条形。4种植物都具有典型的等面叶,上下表皮均有栅栏组织和气孔,叶片厚度大,角质层增厚,植株储水保水能力强,可通过改变叶表面积、调节气体交换、减少蒸腾作用,实现对干旱环境的适应,4种植物对干旱生境有很强的适应性。本研究可为揭示孑遗植物的抗旱机理以及濒危植物保护提供理论支撑。
In order to understand the adaptability of several endangered relict plants to arid environment in western Ordos,the leaf anatomical structure of four relict plants were observed by paraffin section method.The results showed that there were significant differences in leaf structure among the different species in the same habitat.The leaf anatomy of Tetraena mongolica was semi-lunar,the leaf anatomy of Ammopiptanthus mongolicus was flat,the leaf anatomy of Helianthemum ordosicum was curled under normal condition,and the leaf anatomy of Sarcozygium xanthoxylon was oval strip.All the four plants had typical equilateral leaves,and the upper and lower epidermis had palisade tissue and stomata.The leaves were thick,and the cuticle was thickened,the plants had strong water storage and water retention capacity.The adaptation to the arid environment was achieved by changing the leaf surface area,regulating gas exchange and reducing transpiration.The four plants had strong adaptability to arid habitats.The research results could provide theoretical support for revealing the drought resistance mechanism of relict plants and protecting endangered plants.
作者
曹恭祥
邢钰坤
邢钟毓
李银祥
杨跃文
闫峰
曹建军
CAO Gongxiang;XING Yukun;XING Zhongyu;LI Yinxiang;YANG Yuewen;YAN Feng;CAO Jianjun(Inner Mongolia Academy of Forestry Science,Hohhot 010010,China;Inner Mongolia Ordos Forest Ecosystem Research Station,Ordos 016100,China;Inner Mongolia Forestry and Grassland Protection Station,Hohhot 010010,China)
出处
《内蒙古林业科技》
2023年第4期41-45,共5页
Journal of Inner Mongolia Forestry Science and Technology
基金
内蒙古自治区人才开发基金“西鄂尔多斯地区2种濒危孑遗植物水分利用策略及机理研究”
内蒙古自治区林业科学研究院项目“干旱区几种植物生态特性及繁殖技术研究”。