文献类型：期刊文献

英文题名：Integrating 3D Canopy Reconstruction to Assess Photosynthetic and Carbon Sequestration Responses of Larch Plantations to Drought Stress

作者：Wu, Chunyan[1,2] Yang, Tingdong[3] Chen, Dongsheng[1] Cheng, Min[4] Li, Yanjie[5] Sun, Xiaomei[1] Zhang, Shougong[1]

第一作者：Wu, Chunyan;吴春燕

通信作者：Sun, XM[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat State Forestry &, Beijing, Peoples R China;[2]Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess Pl, Yangling 712100, Shaanxi, Peoples R China;[3]Chinese Acad Forestry, Inst Forest Resource Informat Tech, Beijing, Peoples R China;[4]Zhejiang Univ Finance & Econ, Inst Land & Urban Rural Dev, Hangzhou 310018, Peoples R China;[5]Chinese Acad Forestry, Res Inst Subtrop Forestry, Ctr Smart Forestry Innovat & Res, Hangzhou 311400, Zhejiang, Peoples R China

年份：2025

卷号：7

期号：3

外文期刊名：PLANT PHENOMICS

收录：;EI(收录号：20252518639575);Scopus(收录号：2-s2.0-105008373205);WOS:【SCI-EXPANDED(收录号:WOS:001518695800001)】；

基金：This work is supported by the Fundamental Research Funds of CAF (CAFYBB2023QA001) , State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling 712100 Shaanxi, P.R. China (F2010121002-202429) , The National Key Research and Development Program of China (2023YFD2200801) , National Natural Science Foundation of China (General Program) (32371862) . We appreciate the comments and suggestions given by all anonymous reviewers of this study.

语种：英文

外文关键词：Plant phenotyping; 3D canopy reconstruction; Drought resilience; Photosynthetic traits; Structural-functional dynamics

摘要：Forest phenotypic responses are significantly influenced by extreme climate conditions, particularly canopy structure and photosynthetic traits. However, the underlying mechanisms driving these responses, especially in conifer species, remain poorly understood. This study employs advanced phenotyping technologies, combining three-dimensional (3D) canopy reconstruction with high-resolution physiological trait analysis, quantifying changes in key physiological traits that light interception, gas exchange parameters stomatal conductance, and chlorophyll content. Developing 3D reconstruction algorithms tailored to conifer canopies is essential for simulating forest ecosystem responses under varying canopy densities. We investigate the following questions: (1) How does thinning affect canopy light penetration and photosynthetic efficiency? Thinning significantly increased light penetration from 15 % (CK) to 22 %, enhancing photosynthetic efficiency, resulting in an 18 % increase in carbon absorption under drought conditions. (2) How does reduced-rainfall affect photosynthetically active radiation (PAR) and stomatal conductance? Reduced-rainfall caused a 12 % decrease in PAR, a 20 % reduction in stomatal conductance, and an 8 % decrease in chlorophyll content. (3) What are the synergistic effects of thinning and reduced-rainfall in carbon absorption? Thinning under reduced-rainfall increased carbon absorption by 25 %. This study reveals a significant correlation between chlorophyll content, leaf nitrogen content, and canopy structural dynamics under drought and elevated temperature conditions, offering new insights into the adaptive mechanisms plants employ to adjust their photosynthetic processes. In conclusion, the development of 3D reconstruction algorithms tailored for conifer canopies, in regulating photosynthetic traits, is crucial for improving forest adaptation, contributing to functional trait-based forest management and ecosystem modeling.