广西科学2024，Vol.31Issue(6)：1121-1131,11.DOI:10.13656/j.cnki.gxkx.20241207.006
漓江流域常见植物叶片非结构性碳水化合物动态及其生态适应性
Dynamics and Ecological Adaptability of Non-Structural Carbo-hydrates in Leaves of Common Plants in the Lijiang River Basin
摘要
Abstract
Non-Structural Carbohydrates(NSC)can effectively reveal the adaptive mechanisms of plants to external environments.With the aim of exploring the adaptive changes of plants in the Lijiang River Basin across karst and non-karst habitats during rainy and dry seasons,the dynamic changes and differences in the content of NSC and its components(soluble sugars and starch)were analyzed.The results are expected to provide a scientific basis for the selection of suitable plants in different habitats.Leaves of 12 representative plant species were collected during both the dry and rainy seasons to measure the content of NSC,soluble sugars,and starch.A Bayesian multivariate regression model was established to quantitatively analyze the effects of rainy and dry seasons,habitat conditions,plant life forms,and plant growth forms on the content of NSC and its components in plant leaves.The results were summarized as follows.(1)Among the 12 plant species,the average content of NSC during rainy and dry seasons was(84.23±57.04)mg/g,in which soluble sugars were the main component,with the average content of(114.80±62.84)mg/g,significantly higher than the starch content of(30.60±23.06)mg/g.(2)Significant dynamic shifts were observed in the content of soluble sugars and starch in the leaves of the 12 plant species between dry and rainy seasons,with starch content being significantly higher and soluble sugar content significantly lower during the rainy season than those during the dry season.(3)There were significant differences in the leaf content of starch and soluble sugars between karst slope and non-karst slope,while no significant differences were observed in the content of NSC and its components in the leaves of plants growing in karst depression,karst pass,and non-karst habi-tats.(4)The content of NSC and its components varied among plants of different life forms,with deciduous plants showing significantly higher content of NSC and its components than evergreen plants.Additionally,a-mong plants of different growth forms,tree species had significantly higher leaf starch content but signifi-cantly lower soluble sugar content than shrubs.In conclusion,the content of NSC,soluble sugars,and starch in the leaves of common plant species in the Lijiang River Basin is closely related to their biological character-istics and habitat conditions,and it is also influenced by dry and rainy seasons.The seasonal variation in leaf NSC content is a complex dynamic process.关键词
非结构性碳水化合物/淀粉/可溶性糖/不同降水季节/生态适应性Key words
Non-Structural Carbohydrates(NSC)/starch/soluble sugars/dry and rainy seasons/ecological adaptability分类
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钟艺倩,王斌,吴淼锐,杨美雪,徐泽帅,陶旺兰,李健星,赵弘明,李先琨..漓江流域常见植物叶片非结构性碳水化合物动态及其生态适应性[J].广西科学,2024,31(6):1121-1131,11.基金项目
广西重点研发计划项目(桂科AB22080057)和国家重点研发计划课题(2019YFC0507503)资助. （桂科AB22080057）
