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[1]杨芳 王振孟 朱大海 阳小成 向双**.常绿阔叶林林下6种木本植物叶片非结构性碳水化合物的动态特征*[J].应用与环境生物学报,2019,25(05):1-13.[doi:10.19675/j.cnki.1006-687x.2018.11018]
 YANG Fang,WANG Zhenmeng,et al.Dynamic characteristics of non-structural carbohydrates in leaves of six woody plants under evergreen broad-leaved forest*[J].Chinese Journal of Applied & Environmental Biology,2019,25(05):1-13.[doi:10.19675/j.cnki.1006-687x.2018.11018]
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常绿阔叶林林下6种木本植物叶片非结构性碳水化合物的动态特征*()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
25卷
期数:
2019年05期
页码:
1-13
栏目:
研究论文
出版日期:
2019-08-25

文章信息/Info

Title:
Dynamic characteristics of non-structural carbohydrates in leaves of six woody plants under evergreen broad-leaved forest*
作者:
杨芳12 王振孟2 朱大海3 阳小成1 向双2**
1成都理工大学环境学院 成都 610059
2中国科学院成都生物研究所,中国科学院山地生态恢复与生物资源利用重点实验室,生态恢复与生物多样性保育四川省重点实验室 成都 610041
3龙溪-虹口国家级自然保护区管理局 都江堰 611830
Author(s):
YANG Fang1 2 WANG Zhenmeng2 ZHU Dahai3 YANG Xiaocheng1 & XIANG Shuang 2**
1College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China
2CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province,Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
3Longxi-Hongkou National Nature Reserve Administration Dujiangyan, Chengdu 611830
关键词:
非结构性碳水化合物(NSC)可溶性糖淀粉光合色素比叶重(LMA)亚热带常绿阔叶林
Keywords:
non-structural carbohydrates (NSC) soluble sugar starch photosynthetic pigment leaf mass per area (LMA) subtropical evergreen broad-leaved forest
DOI:
10.19675/j.cnki.1006-687x.2018.11018
摘要:
植物叶片非结构性碳水化合物(NSC)不仅为植物代谢提供重要能量,还能一定程度上反映植物对外界环境的适应策略。以亚热带常绿阔叶林林下6种植物:茶(Camellia sinesis)、细枝柃(Eurya loquaiana)、润楠(Machilus pingii)、 短刺米槠(Castanopsis carlesii)、大叶山矾(Symplocos grandis)和薄叶山矾(S. anomala)为对象,研究各物种抽枝展叶进程中叶片大小、比叶重(LMA)、光合色素以非结构性碳水化合物及其组分含量的动态变化,分析NSC组分之间及与光合色素与比叶重(LMA)间的相互关系,探讨展叶过程中引起叶片NSC差异的原因。结果表明:(1)各物种单叶面积随叶片展开而增加直至8月下旬达到最大,为9.20 cm2(茶)-40.81 cm2(大叶山矾);而LMA在展叶初期下降后随叶片展开逐步升高,直到次年1月下旬还在持续缓慢增加,因各物种不同,最大值为82.90 g/m2 -152.10 g/m2;光合色素则在展叶进程中逐渐增加,6月下旬达到较高值后在整个夏秋季维持较高的含量,次年1月有所下降。(2)在整个当年生叶片生长进程中,6种植物叶片可溶性糖含量总体上由展叶初期逐渐增加,而淀粉含量随着叶片的生长成熟逐渐降低;各物种NSC含量为87.00 mg/g(薄叶山矾)-163.35 mg/g(细枝柃),除大叶山矾和薄叶山矾外,NSC含量随着叶片生长进程逐渐增加;(3)各物种可溶性糖含量随着淀粉含量的增加而降低,叶绿素含量随着LMA的增加而显著增加,可溶性糖与LMA具有显著的正相关关系,而淀粉与LMA呈显著负相关(R2 = 0.51-0.86, P < 0.004),表明展叶后期部分淀粉转化为可溶性糖,这与展叶后期林内光资源的可利用性以及植物的生理活动相关。综上所述,随着展叶进程,非结构性碳水化合物及其组分具有不同的变化规律,一方面与叶片增大增厚进程中的生理活动有关,另一方面也反映了叶片功能属性间的权衡关系,研究结果可为阐明亚热带常绿阔叶林林下木本植物展叶期的碳代谢提供理论基础,亦丰富了森林植物生活史对策理论。(图6参53)
Abstract:
Non-structural carbohydrates (NSC) in plant leaves can not only reflect the status of carbon supply in plants, but also reflect the adaptation strategies of plants to the external environment. Six species of subtropical evergreen broad-leaved forest woody plants including Camellia sineis, Eurya loquaiana, Machilus pingii, Castanopsis carlesii, Symplocos grandis and S. anomala were studied in this paper. The dynamic changes of leaf area, leaf mass per area, photosynthetic pigments content, non-structural carbohydrates and their components in leaves at different developmental stages were monitored, and the relationships between these traits were analyzed. The reasons for the differences of NSC among leaves were discussed. 1) During the whole process of leaf expansion, individual leaf area increased with the time till to a homeostasis, and the maximum value reached in late August, from 9.20 cm2 (Camellia sinesis) to 40.81 cm2 (Symplocos grandis). LMA decreased at the initial leaf spreading period and then continously increased. Until the end of January of the following year, it continued to increase slowly. Because of different species, the maximum value was from 82.90 g/m2 -152.10 g/m2. Content of chlorophyll increased during the whole year, and maintained a higher content throughout the summer and autumn after reaching a higher value in late June, but slightly decreased in January of the following year. 2) The contents of soluble sugar and NSC in the leaves of six plants showed similar trends, increasing gradually from the early stage of leaf expansion to the full expansion stage while starch showed the opposite trend. The content of NSC of each species is form 87.00 mg/g (S. anomala)to 163.35 mg/g (Eurya loquaiana). Except for the Symplocos grandis and S. anomala, the content of NSC increased gradually with the leaf growth process. 3)The contents of soluble sugar decreased with starch increasing, chlorophyll increased with LMA increased, the soluble sugar content positively correlated with LMA, but starch content negatively correlated with LMA (R2 = 0.51-0.86, P < 0.004), suggested at the late stage of leaf development, starch may convert to soluble sugar, which may due to light availability and physical activity of plants in the forest. The above results demonstrated that the changes of non-structural carbohydrates in the leaves of undergrowth plants in evergreen broad-leaved forest showed different dynamic changes and storage characteristics at different leaf development stages. The changes of photosynthetic pigments and LMA were related to the accumulation of non-structural carbohydrates. The results suggested NSC and the component varied with leaf development stage, it on one hand related to the physical activities during leaf expansion and thickening, moreover reflected the trade-off relationships among the functional traits, which provide a theoretical basis for elucidating the carbon metabolism during the unfolding stage of woody species in subtropical evergreen broad-leaved forest, as well as expanding the plant life history theory for forest plants adapting to the understory environment.

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备注/Memo

备注/Memo:
收稿日期 Received: 2018-11-11 接受日期 Accepted: 2019-02-26
*国家自然科学基金项目(31370594)和国家“十三五”重点研发计划项目(2017YFC0505002)资助
**通讯作者 Corresponding author(E-mail: xiangshuang@cib.ac.cn)
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更新日期/Last Update: 2019-03-13