Cell wall thickness constrains photosynthesis of coexisting species in a subtropical plantation by reducing mesophyll conductance and maximum carboxylation rate
文献类型：期刊论文
| 作者 | Liao, Minru1,2; Wang, Jing1,2; Wen, Xuefa1,2 |
| 刊名 | TREE PHYSIOLOGY
 |
| 出版日期 | 2025-08-01 |
| 卷号 | 45期号:8页码:tpaf078 |
| 关键词 | biochemical processes biophysical processes CO2 demand CO2 supply leaf anatomical structure |
| ISSN号 | 0829-318X |
| DOI | 10.1093/treephys/tpaf078 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | The interspecific variation in the net photosynthetic rate (A(net)) reflects coordination and trade-offs between biophysical and biochemical processes, yet the underlying morphophysiological mechanisms remain poorly understood. To address this, we quantified photosynthetic parameters as well as morphological, anatomical and nutrient traits of 12 coexisting needle and broadleaf species within a subtropical coniferous plantation of the East Asian monsoon region. Across species, A(net) is primarily constrained by stomatal conductance (g(s)), secondarily by maximum carboxylation rate (V-cmax) and minimally by mesophyll conductance (g(m)). A negative correlation between g(s)/A(net) and g(m)/A(net) suggests that increases in g(m) partially compensate for stomatal limitations on A(net), while the negative correlation between g(t)/A(net) (g(t), total conductance) and V-cmax/A(net) reflects CO2 supply-demand trade-off during photosynthesis. Variation in g(m) reflects the coordination between cell wall thickness (T-CW) and the chloroplast surface area exposed to intercellular air spaces (S-c/S). Variation in V-cmax is negatively related to T-CW, rather than to leaf nitrogen and phosphorus per unit area. Structural equation modeling further reveals that T-CW indirectly regulates A(net) through both V-cmax and g(m), with its limiting effect on V-cmax being slightly stronger than on g(m). Needle species exhibit g(s) and V-cmax comparable to those of broadleaf species; however, their lower g(m) results in a significantly reduced A(net). This reduction is attributed to greater T-CW and lower S-c/S. Additionally, the higher T-CW in needle species may lead to increased allocation of leaf nitrogen to non-photosynthetic tissues, as their significantly higher leaf nitrogen content compared with broadleaf species is not accompanied by a corresponding increase in V-cmax. Variation in V-cmax is driven by T-CW rather than by leaf nutrient, underscoring the necessity of incorporating leaf anatomical traits into mechanistic and predictive models. Moreover, as water and nitrogen limitations increase during forest succession, needle species in subtropical plantations-characterized by low g(m) and high T-CW-are likely to be replaced by broadleaf species. |
| URL标识 | 查看原文 |
| WOS关键词 | NITROGEN-USE EFFICIENCY ; DIFFUSION CONDUCTANCE ; CO2 DIFFUSION ; LEAF ANATOMY ; TEMPERATURE RESPONSE ; LIGHT GRADIENTS ; CARBON GAIN ; LIMITATIONS ; CAPACITY ; WATER |
| WOS研究方向 | Forestry |
| 语种 | 英语 |
| WOS记录号 | WOS:001553501900001 |
| 出版者 | OXFORD UNIV PRESS |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/215598]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 通讯作者 | Wang, Jing |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, A11 Datun Rd, Beijing 100101, Peoples R China; 2.Univ Chinese Acad Sci, Coll Resources & Environm, 1 Yanqihu East Rd, Beijing 101408, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liao, Minru,Wang, Jing,Wen, Xuefa. Cell wall thickness constrains photosynthesis of coexisting species in a subtropical plantation by reducing mesophyll conductance and maximum carboxylation rate[J]. TREE PHYSIOLOGY,2025,45(8):tpaf078. |
| APA | Liao, Minru,Wang, Jing,&Wen, Xuefa.(2025).Cell wall thickness constrains photosynthesis of coexisting species in a subtropical plantation by reducing mesophyll conductance and maximum carboxylation rate.TREE PHYSIOLOGY,45(8),tpaf078. |
| MLA | Liao, Minru,et al."Cell wall thickness constrains photosynthesis of coexisting species in a subtropical plantation by reducing mesophyll conductance and maximum carboxylation rate".TREE PHYSIOLOGY 45.8(2025):tpaf078. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。