COMPARATIVE STUDY ON LEAF ANATOMICAL STRUCTURE AND PHOTOSYNTHETIC CHARACTERISTICS OF WILD AND RETROGRESSION POPULATIONS OF PAPHIOPEDILUM EMERSONII

IF 0.7 4区环境科学与生态学 Q4 ECOLOGY

Applied Ecology and Environmental Research Pub Date : 2025-01-01 DOI:10.15666/aeer/2306_1091310926

Xiaojie Cai, Lihong Gao, Sam Yang, Lu Liang, Fengshou Tang, Yebin Jiang, Rong Zou, Xiaochun Wei

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Abstract

This study systematically compared the differences in photosynthetic physiological characteristics and leaf anatomical structure between the population of the original habitat and the regression population of Paphiopedilum emersonii.The results showed that the in situ plants showed significant advantages in photosynthetic performance, including higher net photosynthetic rate, maximum photosynthetic rate (Pmax), light saturation point (LSP) and apparent quantum yield (AQY), but their chlorophyll content was lower than that of the regression plants.The anatomical structure showed that the leaves of the regression plants were thicker, and the thickness of palisade tissue and sponge tissue and stomatal area were significantly larger than those of the regression plants, which was positively correlated with their higher chlorophyll content.It is worth noting that photosynthetic parameters (Pmax, LSP, AQY) were significantly positively correlated with pigment parameters (Car/Chl a + b) and upper epidermis thickness (UET).Based on these findings, it is recommended to select a moist habitat with shading when returning to the introduction to alleviate photoinhibition and maintain water balance, thereby increasing the survival rate of the returning plants.

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野生草与退化居群叶片解剖结构及光合特性的比较研究

本研究系统比较了原生境与回归种群在光合生理特性和叶片解剖结构上的差异。结果表明，原位植株在净光合速率、最大光合速率（Pmax）、光饱和点（LSP）和表观量子产率（AQY）方面具有显著优势，但叶绿素含量低于回归植株。解剖结构分析表明，退耕植株叶片更厚，栅栏组织、海绵组织厚度和气孔面积均显著大于退耕植株，这与其较高的叶绿素含量呈正相关。值得注意的是，光合参数（Pmax、LSP、AQY）与色素参数（Car/Chl a + b）和上表皮厚度（UET）呈显著正相关。综上所述，建议在返回引种时选择有遮荫的湿润生境，以减轻光抑制，维持水分平衡，从而提高返回植株的成活率。

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来源期刊

Applied Ecology and Environmental Research ECOLOGY-ENVIRONMENTAL SCIENCES

CiteScore

1.40

自引率

14.30%

发文量

104

审稿时长

14 months

期刊介绍： The Journal publishes original research papers and review articles. Researchers from all countries are invited to publish pure or applied ecological, environmental, biogeographical, zoological, botanical, paleontological, biometrical-biomathematical and quantitative ecological or multidisciplinary agricultural research of international interest on its pages. The focus is on topics such as: -Community, ecosystem and global ecology- Biometrics, theoretical- and quantitative ecology- Multidisciplinary agricultural and environmental research- Sustainable and organic agriculture, natural resource management- Ecological methodology, monitoring and modeling- Biodiversity and ecosystem research, microbiology, botany and zoology- Biostatistics and modeling in epidemiology, public health and veterinary- Earth history, paleontology, extinctions, biogeography, biogeochemistry- Conservation biology, environmental protection- Ecological economics, natural capital and ecosystem services- Climatology, meteorology, climate change, climate-ecology. The Journal publishes theoretical papers as well as application-oriented contributions and practical case studies. There is no bias with regard to taxon or geographical area. Purely descriptive papers (like only taxonomic lists) will not be accepted for publication.