摘要
以猪血木幼苗为研究对象,在非灭菌条件下进行幼苗接种丛枝菌根的盆栽试验。通过测定幼苗株高、叶片光合色素含量和叶片数生长动态,结合动态生命表和株高增长动态分析方法,探讨了非灭菌条件下丛枝菌根对濒危植物猪血木幼苗生长的影响。结果表明,与对照组相比,接种丛枝菌根提高了叶片光合色素的含量,显著提高了幼苗的存活率,促进幼苗的株高和叶片生长;动态生命表分析表明,接种丛枝菌根的幼苗在生长初期的48周中无明显的危险死亡期;对照组幼苗存活率曲线为Deevey-III型,幼苗在初期表现出较高的死亡率。故接种丛枝菌根能促进猪血木幼苗的生长,增强幼苗对环境的适应性,提高幼苗的存活率。研究结果为该濒危物种的有效保护和种群恢复提供了理论依据。
Euryodendron excelsum H.T.Chang is an endangered species from the family Theaceae endemic to China.It has been reduced to one remnant population with less than 200 individuals in Bajia region of Yangchun County, Guangdong Province.The species is listed as a Grade Two endangered plant for state protection in the Red Data Book of plants in China.A pot experiment was conducted toinvestigate the effect of indigenous Arbuscular Mycorrhizal（AM） inoculation on the seedling growth dynamics of E.excelsum under non-sterilized soil conditions.The individual height, survival rate, number of leaves and the content of photosynthetic pigments in the leaves were recorded.Moreover, the dynamic life table and survival curve of E.excelsum were also tabulated and analyzed.Results show that AM inoculation of E.excelsum seedling not only can increase the survival rate, but also may promote the height and leaves growth.Furthermore, the content of photosynthetic pigments in the leaves was increased after indigenous AMF inoculation, indicting the improvement of photosynthesis.The seedlings which inoculated AM have no obvious mortality during the first 48 weeks, while the survival curve of the control treatment belongs to Deevey-Ⅲ, suggesting a high mortality rate in the early seedling growth stage.It is concluded that AM inoculation can promote E.excelsum seedling＇s growth and increase its environmental fitness.The research results could provide a reference for the effective conservation and population recovery of this critically endangered species.
出处
《科技导报》
CAS
CSCD
北大核心
2009年第16期19-25,共7页
Science & Technology Review
基金
国家自然科学基金项目(30560017)
<科技导报>"博士生创新研究资助计划"项目(kjdb20090101-4)
国家基础科学人才培养科学基金项目(J0730652)
关键词
丛枝菌根
动态生命表
濒危植物
猪血木
种群恢复
Arbuscular mycorrhizal
dynamic life table
endangered plant
Euryodendron excelsum
population recovery
作者简介
申仕康，博士研究生，研究方向为保护生物学和丛枝菌根，电子信箱：ssk168＠yahoo．com．cn；
王跃华（通信作者），教授，研究方向为保护生物和植物学等，电子信箱：wangyh58212@yahoo．com．cn
