为研究苜蓿组织结构对NaHCO3胁迫的响应，本实验采用石蜡切片技术和光学显微技术，以甘农3号紫花苜蓿为研究试材，比较研究了0，100和150 mmol／L的NaHCO3胁迫处理对甘农3号紫花苜蓿根、茎和叶内部结构的影响。最显著的结果在于NaHCO3盐碱胁迫对紫花苜蓿植株维管系统影响较大，使贯通于根、茎、叶3个器官的维管组织变小，导致木质部和韧皮部输导能力锐减，极大地限制了由根系吸收的溶解有盐离子的水分向地上部分的运输。此外，在NaHCO3盐碱胁迫下，各营养器官的其他组织也发生了相应的改变。盐碱胁迫使苜蓿叶片整体变薄，对海绵组织的影响强于栅栏组织，造成栅栏组织在叶片中所占比例相对增加；使茎的横切面变为不规则形，表皮细胞变小变薄，胞壁角质层加强，且使位于茎中央的髓薄壁组织细胞直径减小，数量增加，而髓细胞的内含物浓度增加；在盐碱胁迫下促进了根部的发育，根部直径显著变粗，木质导管直径显著变小但数量增多。

田晨霞

张咏梅

王凯

张万

草业学报

Acta PRATACULTURAE SINICA was founded in 1990, the journal is hosted by China Association for Science and Technology, and co-sponsored by the Chinese Grassland Society and Lanzhou University. The journal is the leading journal in grassland and pastoral research in China. It has consistently ranked as the top 4 scientific journals among 1994 journals in all fields of science and technology in China in 2009. The journal serves as an important reference for research scientists, university lecturers, post graduate students, policy markers and all others interested in the pastoral agriculture and sustainable utilization of natural and agricultural resources. The jouranl is dedicated to shareing knowledge, ideas, concepts and philosophies on development of sustainable pastoral agriculture systems for both agricultural and non-agricultural purposes, and to promoting the understanding of the processes that affect ecological values, forage production, livestock production, and market development within pastoral agriculture systems. It publishes original research in all aspects of grassland science. It also publishes reviews, comments, and short communications. The journal is particularly interested to publish work of young scientists.

Acta Prataculturae Sinica was founded in 1990 and is hosted by the China Association for Science and Technology, co-sponsored by the Chinese Grassland Society and Lanzhou University. The journal is a leading publication in the field of grassland and pastoral research in China. In 2009, it consistently ranked among the top four scientific journals out of 1994 in all fields of science and technology in China. The journal serves as an important reference for research scientists, university lecturers, postgraduate students, policymakers, and anyone interested in pastoral agriculture and the sustainable utilization of natural and agricultural resources. It is dedicated to sharing knowledge, ideas, concepts, and philosophies on the development of sustainable pastoral agriculture systems for both agricultural and non-agricultural purposes, and to promoting the understanding of the processes that affect ecological values, forage production, livestock production, and market development within pastoral agriculture systems. It publishes original research in all aspects of grassland science, as well as reviews, comments, and short communications. The journal is particularly interested in publishing the work of young scientists.

《Acta Prataculturae Sinica》创刊于1990年，由中国科学技术协会主办，中国草地学会和兰州大学共同协办。该期刊是中国草地和牧业研究领域的领先期刊。2009年，它在1994种科学技术领域的期刊中排名前四。期刊为研究科学家、大学讲师、研究生、政策制定者及所有对牧业农业和自然及农业资源的可持续利用感兴趣的人士提供了重要的参考。期刊致力于分享关于可持续牧业农业系统发展的知识、思想、概念和哲学，促进对影响生态价值、饲料生产、牲畜生产和市场发展过程的理解。它发表草地科学各个方面的原创研究，同时也刊登综述、评论和短篇通讯。该期刊特别欢迎年轻科学家的研究成果。

紫花苜蓿组织解剖结构对NaHCO3盐碱胁迫的响应

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