摘要
采用蒽酮比色法 ,测定了克隆植物慈竹构件和分株水平的可溶性糖含量 ,以探讨其对环境的生理适应性 .结果表明 ,在构件水平 ,可溶性糖含量以慈竹叶最大 ,枝条次之 ,秆最小 .不同构件的可溶性糖含量对分株年龄和分株部位的反应格局不同 ,1龄分株枝和秆的可溶性糖含量较高 ,而分株年龄对叶的可溶性糖含量影响不显著 ;分株下层叶和秆的可溶性糖含量大于上中层 .高光条件下 1龄分株叶的可溶性糖含量显著高于弱光条件下的 1龄分株 .叶可溶性糖含量受季节影响显著 ,1月最低 ,4月最高 ,但 2龄和 3龄分株间差异不显著 .母分株和子分株上、中两层叶可溶性糖含量呈显著正相关 ,而下层相关性不显著 .在分株水平 ,慈竹 5个龄级间的可溶性糖含量无显著差异 .总之 ,慈竹可溶性糖含量受生物和非生物因子的影响显著 ,且分株和构件层次存在差异 .
In this paper,soluble sugar content of Neosinocalamus affinis was measured by anthrone colorimetry at two levels of module and ramet in order to reveal its ecological and physiological adaptability.The results showed that soluble sugar content decreased in the order of leaf > branch > culm.As for soluble sugar content,different modules responded to ramet age and position in different ways.The branch and culm of 1-year-old ramets contented more soluble sugar than those of other four ages,but soluble sugar content in leaf was independent to ramet age.For leaf and culm,lower parts of ramet contented more soluble sugar than middle and upper parts.Under high irradiance,the soluble sugar content of Neosinocalamus affinis leaf was more than that under low irradiance.Seasonal change had significant effect on soluble sugar content.The soluble sugar content of leaf presented a monthly change,with a bottom and upper value in January and in April,respectively,but there was no obvious difference between 2-year-old and 3-year-old ramets.The soluble sugar content of parent ramet leaves was positively correlative to that of daughter ramet in upper and middle parts of ramets.There was no significant difference between ramet ages at ramet level.Hierarchical response of physiological character to environmental changes existed at the module and ramet levels of Neosinocalamus affinis.
出处
《应用生态学报》
CAS
CSCD
2004年第11期1994-1998,共5页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目 (3 0 3 70 14 9)
四川省重点学科建设项目(SZD0 42 0 )
西华师范大学科研启动基金资助项目 (2 0 0 1)
关键词
可溶性糖含量
慈竹
克隆植物
构件水平
分株水平
Soluble sugar content, Neosinocalamus affinis, Clonal plant, Module level, Ramet level.
