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王登惠,王静,董燕平,韦宇静,农正权,龙继凤,王斌,李冬兴.喀斯特季节性雨林树种气孔性状分异格局及其驱动机制[J].广西科学院学报,2025,41(2):191-203. [点击复制]
- WANG Denghui,WANG Jing,DONG Yanping,WEI Yujing,NONG Zhengquan,LONG Jifeng,WANG Bin,LI Dongxing.Divergence Patterns and Driving Mechanisms of Stomatal Traits in Tree Species from Karst Seasonal Rainforests[J].Journal of Guangxi Academy of Sciences,2025,41(2):191-203. [点击复制]
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| 喀斯特季节性雨林树种气孔性状分异格局及其驱动机制 |
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王登惠1, 王静1,2, 董燕平3, 韦宇静1, 农正权4,5, 龙继凤4,5, 王斌1,5, 李冬兴1,5
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| (1.广西壮族自治区中国科学院广西植物研究所, 广西喀斯特植物保育与恢复生态学重点实验室, 广西桂林 541006;2.桂林理工大学地球科学学院, 广西桂林 541006;3.钟山县第二中学, 广西贺州 542699;4.崇左市广西弄岗国家级自然保护区管理中心, 广西崇左 532499;5.弄岗喀斯特生态系统广西野外科学观测研究站, 广西崇左 532499) |
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| 摘要: |
| 本研究旨在阐明广西喀斯特季节性雨林中优势树种气孔性状在不同生境梯度上的分异格局，揭示环境适应性及系统发育历史的共同驱动机制，为石漠化生态恢复提供理论依据。为此，本研究选取雨林中33种优势树种的3 300个叶片为研究对象，测定其气孔性状，并通过系统发育信号分析评估性状的进化保守性，结合环境因子进行多元回归分析，解析气孔性状的分异格局及驱动因素。结果表明，洼地、中坡和山顶生境植物的气孔性状权衡策略存在显著差异。洼地植物气孔长度较大[(10.73±2.93) μm]，密度较低[(327.82±163.50) stomata/mm2]；山顶植物气孔密度较高[(521.33±269.80) stomata/mm2],气孔开度最大(0.46±0.18)；中坡植物的气孔特性介于两者之间。系统发育信号分析显示，气孔面积与气孔周长面积比例具有显著系统发育保守性(P<0.05)；气孔开度等动态性状则无显著系统发育信号。冗余分析(Redundancy Analysis，RDA)结果表明，岩石裸露度、土壤全碳和土壤全氮是驱动植物气孔性状分异的关键因子；地形干旱指数通过影响植物调控气孔面积与密度的权衡关系，进而影响其水分利用策略。上述结果说明喀斯特植物通过多维适应策略实现进化分异，系统发育保守性与环境筛选共同塑造气孔性状进化机制。本研究可为石漠化地区生态恢复的物种筛选和群落构建提供理论依据。 |
| 关键词: 季节性雨林 气孔性状权衡 系统发育保守性 环境筛选 喀斯特峰丛洼地 |
| DOI：10.13657/j.cnki.gxkxyxb.20250722.005 |
| 投稿时间：2025-05-20修订日期：2025-06-20 |
| 基金项目:国家自然科学基金项目(32260276，32271599)，弄岗喀斯特生态系统广西野外科学观测研究站科研能力建设项目(桂科23-026-273)和广西植物研究所基本业务费项目(桂植业23014)资助。 |
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| Divergence Patterns and Driving Mechanisms of Stomatal Traits in Tree Species from Karst Seasonal Rainforests |
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WANG Denghui1, WANG Jing1,2, DONG Yanping3, WEI Yujing1, NONG Zhengquan4,5, LONG Jifeng4,5, WANG Bin1,5, LI Dongxing1,5
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| (1.Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin, Guangxi, 541006, China;2.College of Earth Sciences, Guilin University of Technology, Guilin, Guangxi, 541006, China;3.Zhongshan County Second Senior High School, Hezhou, Guangxi, 542699, China;4.Administration Center of Guangxi Nonggang National Nature Reserve, Chongzuo, Guangxi, 532499, China;5.Nonggang Karst Ecosystem Observation and Research Station of Guangxi, Chongzuo, Guangxi, 532499, China) |
| Abstract: |
| The purpose of this study is to clarify the differentiation pattern of stomatal traits of dominant tree species in karst seasonal rain forest in Guangxi on different habitat gradients,reveal the common driving mechanism of environmental adaptability and phylogenetic history,and provide theoretical basis for ecological restoration of rocky desertification.In this study,3 300 leaves of 33 dominant tree species in the rainforest were selected as the research objects,and their stomatal traits were measured.The evolutionary conservation of the traits was evaluated by phylogenetic signal analysis,and multiple regression analysis was carried out in combination with environmental factors to analyze the differentiation pattern and driving factors of stomatal traits.The results showed that there were significant differences in stomatal traits trade-off strategies among plants in depression,middle slope and peak habitats.The stomatal length of depression plants was larger [(10.73±2.93) μm],and the density was lower [(327.82±163.50) stomata/mm2].The stomatal density of plants on the peak was higher [(521.33±269.80) stomata/mm2],and the stomatal opening was the largest (0.46±0.18).The stomatal characteristics of middle slope plants were between the two.Phylogenetic signal analysis showed that the ratio of stomatal area to stomatal perimeter area had significant phylogenetic conservation (P<0.05).There was no significant phylogenetic signal for dynamic traits such as stomatal opening.The results of Redundancy Analysis (RDA) showed that the bareness degree of rock,soil total carbon and soil total nitrogen were the key factors driving plant stomatal differentiation.The topographic drought index affects the water use strategy of plants by affecting the trade-off between stomatal area and density.The above results indicate that karst plants achieve evolutionary differentiation through multi-dimensional adaptation strategies,and phylogenetic conservation and environmental screening jointly shape the evolutionary mechanism of stomatal traits.This study provides a theoretical basis for species screening and community construction for ecological restoration in rocky desertification areas. |
| Key words: seasonal rainforest stomatal traits trade-offs phylogenetic conservatism environmental filtering karst peak-cluster depression |
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