不同立地条件下南方红豆杉幼苗的生长和生理特性  

Growth and physiological characteristics of Taxus wallichiana var. mairei seedlings under different site conditions

作　　者：刘建福[1] 王明元[1] 杨晨[1] 范燕萍[2] 刘春冬 傅建卿 

机构地区：[1]华侨大学生物工程与技术系,福建厦门361021 [2]华南农业大学园艺学院,广州510642 [3]福建省南安市农业科学研究所,福建泉州362300

出　　处：《生态学杂志》2012年第12期3011-3017,共7页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(31101512;30972026);福建省星火计划项目(2010S0037);中央高校基本科研业务费专项(JB-ZR1151);泉州市科技计划重点项目(2010N10)资助

摘　　要：为阐明不同立地条件下南方红豆杉的生长发育、光合特性、活性氧代谢及其与环境的关系,本试验以2年生南方红豆杉幼苗为材料,在福建省泉州地区开展桉树林、樟树林和空地3种生境下南方红豆杉幼苗的生长和生理特性研究,探索适宜南方红豆杉幼苗生长的环境特点。结果表明:桉树林和樟树林下南方红豆杉幼苗的株高和新梢长度显著高于空地,桉树林和樟树林有利于南方红豆杉幼苗的生长;桉树林和樟树林下南方红豆杉幼苗叶绿素b含量和类胡萝卜素含量显著高于空地,气孔导度和蒸腾速率显著提高,净光合速率也高于空地;桉树林和樟树林下南方红豆杉幼苗可溶性糖和氨基酸含量高于空地,蛋白质含量低于空地。桉树林和樟树林下南方红豆杉幼苗超氧化物歧化酶和过氧化氢酶活性显著低于空地,而过氧化物酶活性高于空地;这可能是空地生境对南方红豆杉幼苗产生一定的光胁迫效应,桉树林和樟树林可为南方红豆杉幼苗生长提供必要的遮荫环境,有利于南方红豆杉幼苗的生长。To clarify the relationships between the growth, photosynthesis, and active oxygen me tabolism of Taxus wallichiana var. mairei and the environment under different stand conditions, and to approach the habitats suitable for the growth of T. wallichiana var. mairei seedlings, an investigation was made on the growth and physiological characteristics of two-year-old T. wallichi ana vat. mairei seedlings in three different habitats （Camphor stand, Eucalyptus stand, and open space） in Quanzhou of Fujian Province, East China. As compared with those in open space, the plant height and new shoot length of the seedlings in Eucalyptus and Camphor planta tions were significantly improved, suggesting that woodland habitats benefited the growth of the seedlings. The seedlings chlorophyll b and carotenoid contents, stomatal conductance, transpira tion rate, and net photosynthetic rate in woodland habitats increased significantly, compared with those in open space. The seedling＇ s soluble sugar and amino acid contents were higher in wood- land habitats than in open space, while the seedling＇ s protein contents were in adverse. The SOD and CAT activities of the seedlings in woodland habitats decreased, while the POD activities vironment for the seedling growth, and thus, it would be suitable for T. wallichiana var. mairei seedlings growing in Eucalyptus and Camphor plantations.

关 键 词：南方红豆杉 光合特性 活性氧代谢 环境因素 

分 类 号：S791.49[农业科学—林木遗传育种]