文献类型： 外文期刊

作者： Yin, Junjie ¹ ; Li, Xiao ¹ ; Gu, Xiaoxuan ¹ ; Hao, Saiqi ¹ ; Dai, Jingding ¹ ; Chen, Luzhen ¹ ; Li, Qingshun Q. ¹ ;

作者机构： 1.Xiamen Univ, Coll Environm & Ecol, Key Lab Minist Educ Coastal & Wetland Ecosyst, 4221 Xiangan South Rd, Xiamen 361102, Fujian, Peoples R China

2.Nanjing Forestry Univ, Coll Ecol & Environm, Collaborat Innovat Ctr Sustainable Forestry Southe, State Key Lab Tree Genet & Breeding, 159 Longpan Rd, Nanjing 210037, Jiangsu, Peoples R China

3.Tianjin Acad Agr Sci, Res Inst Forestry & Pomol, Tianjin 300192, Peoples R China

4.Western Univ Hlth Sci, Coll Dent Med, Biomed Sci, 309 Second St, Pomona, CA 91766 USA

关键词： coastal wetland plant; convergent evolution; leaf development; photosynthesis productivity; transcriptomics

期刊名称：TREE PHYSIOLOGY （ 影响因子：3.7； 五年影响因子：4.1 ）

ISSN： 0829-318X

年卷期： 2025 年 45 卷 8 期

页码：

收录情况： SCI

摘要： Photosynthesis in mangroves contributes to one of the most carbon-rich ecosystems on Earth and plays a significant role in mitigating global climate change. However, the mechanisms underlying the high productivity of mangroves remain largely unexplored. Through anatomical analyses, we found that mangrove species with higher biomass production, such as Sonneratia apetala, exhibit isobilateral leaves, which enhance light harvesting and reduce light inhibition, resulting in higher photosynthetic yields. Transcriptomic and genomic analyses revealed the molecular processes underlying the formation of isobilateral leaves. We found that auxin is rapidly synthesized and works in coordination with gibberellin and brassinosteroid in the isobilateral leaves of S. apetala. Interestingly, we identified a group of genes related to adaxial-abaxial leaf polarity in S. apetala, with upregulated genes associated with chlorophyll synthesis, adaxial cell identity and erect leaf growth, while genes related to the recognition of adaxial cell boundaries-possibly related to the lower palisade tissues-were downregulated. Additionally, we identified amino acid substitutions and changes in promoter cis-acting elements in Indole-3-acetic acid carboxylmethyltransferase 1 (IAMT1) in Sonneratia species. These findings provide new insights into the formation of isobilateral leaves in mangroves and their adaptation to intertidal high-light coastal conditions.