中幼龄林华山松非结构性碳水化合物季节变化  

Seasonal variations of non-structural carbohydrates of young and middle-age Pinus armandii plantations

作　　者：李志琪 吴俊文 陈刚 段贵河 文程敬 LI Zhiqi;WU Junwen;CHEN Gang;DUAN Guihe;WEN Chengjing(Key Laboratory of Biodiversity Conservation in Southwest China,State Forestry Administration,Southwest Forestry University,Kunming 650224,China;Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China,Ministry of Education,Southwest Forestry University,Kunming 650224,China)

机构地区：[1]西南林业大学西南地区生物多样性保育国家林业局重点实验室,昆明650224 [2]西南林业大学西南山地森林资源保育与利用教育部重点实验室,昆明650224

出　　处：《西北植物学报》2024年第5期782-791,共10页Acta Botanica Boreali-Occidentalia Sinica

基　　金：华山松和云南松人工林针叶δ^(13)C值季节变化研究项目(2019FD074)

摘　　要：【目的】探究不同龄林华山松非结构性碳水化合物(NSC)及其组分在各器官的分配随季节变化特征,对于揭示不同龄林华山松的碳分配机制有重要意义。【方法】以幼、中龄林华山松为研究对象,通过周期性采样,测定不同龄林华山松不同器官NSC及其组分含量,探究其年内季节动态变化。【结果】(1)不同龄林华山松植株NSC及其组分在各器官间的分配规律基本一致,淀粉含量表现为根>叶>枝>茎,且茎中淀粉含量显著低于其他器官,可溶性糖和NSC含量在叶、根、枝间差异不明显;茎中糖淀比显著高于其他器官。(2)在整个生长季内,华山松NSC及其组分主要受季节影响,季节×器官间交互作用的影响次之,林龄的影响最小。(3)在不同龄林中各器官NSC及其组分之间的相关性基本一致,除幼龄林糖淀比与淀粉、NSC,中龄林糖淀比与淀粉为负相关外,其余指标之间均为正相关。【结论】华山松各器官NSC及其组分含量存在明显的季节波动,当环境变化时不同器官间的碳供需协同变化,有利于华山松生长,并增强其应对极端环境的抵抗力和适应性。[Objective]It is of great significance to explore the distribution of NSC(non-structural carbohydrate)and their components in different organs with seasonal changes for revealing the mechanism of carbon distribution in different age Pinus armandii.[Methods]The contents of NSC and their components in different organs of young and middle-aged P.armandii were determined by periodic sampling to explore the seasonal changes of P.armandii during the year.[Results](1)The distribution pattern of NSC and their components in different age P.armandii was the same among all organs,where the starch content was in the order:Roots>leaves>branches>stems.The starch content in stems was significantly lower than that in other organs,while the content of soluble sugar and NSC in leaves,roots and branches was not significantly different.The ratio of sugar to starch in stems was significantly higher than that in other organs.(2)During the growing season,NSC and their components were mainly affected by seasons,followed by the interaction between seasons and organs,and the influence of forest age was the least.(3)The correlation between NSC and their components in different P.armandii organs was the same.Except the negative correlation between the ratio of sugar to starch and starch,NSC in young-aged P.armandii and the ratio of sugar to starch and starch in middle-aged P.armandii,the other indexes were positively correlated.[Conclusion]NSC and their components in various organs of P.armandii had obvious seasonal fluctuations.When the environment changed,the carbon supply and demand of different organs changed synergistically,which was conducive to the growth of P.armandii,and enhanced its resistance and adaptability to cope with extreme environment.

关 键 词：非结构性碳水化合物 华山松 季节动态 器官 碳分配 

分 类 号：S791.241[农业科学—林木遗传育种]