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Morphoanatomical characteristics of fruits in Bixa orellana L. accessions with contrasting dehiscence phenotypes 裂裂表型对比的Bixa orellana .材料果实形态解剖学特征

IF 1.7 4区生物学

Flora Pub Date : 2025-05-10 DOI: 10.1016/j.flora.2025.152743

Rocío Tamayo-García , José Alberto Narváez-Zapata , Angela Ku-González , Felipe Barredo-Pool , Margarita Aguilar-Espinosa , Renata Rivera-Madrid

{"title":"Morphoanatomical characteristics of fruits in Bixa orellana L. accessions with contrasting dehiscence phenotypes","authors":"Rocío Tamayo-García , José Alberto Narváez-Zapata , Angela Ku-González , Felipe Barredo-Pool , Margarita Aguilar-Espinosa , Renata Rivera-Madrid","doi":"10.1016/j.flora.2025.152743","DOIUrl":"10.1016/j.flora.2025.152743","url":null,"abstract":"<div><div>The main source of bixin is the <em>Bixa orellana</em> L. plant, known as achiote. Bixin, a red apocarotenoid, accumulated mainly in the seeds. The major genetic improvement goal in <em>B. orellana</em> plants is to increase their bixin content. In the search for the most relevant trait associated with bixin production, one of the significant features was the fruit's dehiscence. To generate insight into this characteristic, three variants of <em>B. orellana</em> were selected with different fruit phenotypes related to the dehiscent phenomenon level (dehiscent, indehiscent, and partially dehiscent) and bixin content. Detailed analysis of the anatomical structures of the fruits reveals differences in the dehiscence zone, which is important for seed release, the endocarp glands and vascular bundles vary widely between the three phenotypes. The distribution and number of the endocarp gland vary according to dehiscent phenomena. The dehiscent fruits have smaller cells and a well-defined dehiscence zone with enzymatic degradation. The partially dehiscent fruits combine characteristics of both fruit of the other phenotypes. Lignin deposition was accessed through phloroglucinol-HCl and autofluorescence. Dehiscent fruits showed low lignin deposition, while indehiscent fruits exhibited a clear lignin accumulation in several structures but not in the dehiscence zone. Partially dehiscent fruits showed an intermediate pattern that reinforces their dehiscent or non-dehiscent character. This detailed analysis shows how lignification patterns are associated with each fruit phenotype’s functionality and opening capacity. Lignification and dehiscent phenomena may be important traits in characterizing the <em>B. orellana</em> variants.</div></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":"328 ","pages":"Article 152743"},"PeriodicalIF":1.7,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on the stipe morpho-anatomical traits in some members of Pteridaceae and its Taxonomic relevance 标题蕨科植物柱头形态解剖特征及其分类相关性的研究

IF 1.7 4区生物学

Flora Pub Date : 2025-05-05 DOI: 10.1016/j.flora.2025.152747

Saradiya Mitra, Saurav Moktan

{"title":"Investigation on the stipe morpho-anatomical traits in some members of Pteridaceae and its Taxonomic relevance","authors":"Saradiya Mitra, Saurav Moktan","doi":"10.1016/j.flora.2025.152747","DOIUrl":"10.1016/j.flora.2025.152747","url":null,"abstract":"<div><div>The vascular arrangement of fern and fern-allies has been a source of great fascination for botanists since the nineteenth century to modern times. The study of stipe anatomy has been accepted to be of great taxonomical value and the patterns of organization and vasculature in ferns is a great point for comparative study. The morpho-anatomical traits of fern stipes provide essential insights into fern systematics and phylogenetics. This study explores the morpho-anatomy of stipes in 24 species of Pteridaceae span under four subfamilies, Pteridoideae, Vittarioideae, Cryptogrammoideae, and Cheilanthoideae, collected from the eastern Himalayan region. The morphological traits such as stipe length, colour, surface texture, and scale characteristics were systematically examined. Concurrently, anatomical investigations revealed variations in stipe outlines, vascular bundle shapes, and xylem strand configurations.</div><div>The study highlights significant interspecific variability, with vascular bundle ranging from U to inverted Ω shaped, and xylem strands adopting diverse morphologies such as V, U, and hippocampus-shaped configurations. These anatomical traits show potential taxonomic and phylogenetic value, aiding in species delineation, particularly in cases where morphological features overlap due to convergent evolution.</div><div>Additionally, the study confirms the presence of consistent sclerenchymatous epidermal layers across species, reinforcing the adaptive role of these structures in their ecological niches. The findings emphasize the importance of stipe anatomy as a reliable tool for taxonomic delineation, enhancing the understanding of evolutionary relationships within Pteridaceae.</div></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":"328 ","pages":"Article 152747"},"PeriodicalIF":1.7,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative morpho-anatomy of the female flowers in species of the amazonia palm genuS Oenocarpus Martius 亚马孙棕榈属（Oenocarpus Martius）种雌花形态解剖学比较

IF 1.7 4区生物学

Flora Pub Date : 2025-04-29 DOI: 10.1016/j.flora.2025.152745

Genise Luz de Oliveira , Maria Gracimar Pacheco de Araújo , Fred Stauffer , Kaio Cesar Marinho da Cunha

{"title":"Comparative morpho-anatomy of the female flowers in species of the amazonia palm genuS Oenocarpus Martius","authors":"Genise Luz de Oliveira , Maria Gracimar Pacheco de Araújo , Fred Stauffer , Kaio Cesar Marinho da Cunha","doi":"10.1016/j.flora.2025.152745","DOIUrl":"10.1016/j.flora.2025.152745","url":null,"abstract":"<div><div>Among the Amazon native palm species with potential economic use are those of genus Oenocarpus Mart., tribe Euterpeae, considered one of the most ecologically and economically important tribes within Arecaceae. Considering that floral structure provides a wide range of morphological characters with complex evolutionary patterns, and that morphology and anatomy contribute to our better understanding of physiology and ecological, taxonomic, and phylogenetic relationships, we studied female flowers of four <em>Oenocarpus</em> species (<em>O. bacaba, O. bataua, O. minor</em> and <em>O. mapora</em>) occurring in the Amazonas state, Brazil, representing most species in the Brazilian Amazon. Morphoanatomy indicates that an oval shape pattern is the main trend for the flowers of the genus, with specific differences observed in stigmas, whereas anatomy, histochemistry, and SEM analyses revealed that the main differentiating characteristics are restricted to the perianth. Geometric morphology helped establish similarities and distances between species in shape of the floral outline. Anatomy and histochemistry show that there is a pattern of structural and metabolic organization within the genus, regardless of environment, reinforcing the putative affinity between the species.</div></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":"328 ","pages":"Article 152745"},"PeriodicalIF":1.7,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Seed morphology and its systematic implication in Noccaea s.l. (Brassicaceae) 芸苔科Noccaea s.l.种子形态及其系统意义

IF 1.7 4区生物学

Flora Pub Date : 2025-04-26 DOI: 10.1016/j.flora.2025.152746

Kurtuluş Özgişi , Barış Özüdoğru

{"title":"Seed morphology and its systematic implication in Noccaea s.l. (Brassicaceae)","authors":"Kurtuluş Özgişi , Barış Özüdoğru","doi":"10.1016/j.flora.2025.152746","DOIUrl":"10.1016/j.flora.2025.152746","url":null,"abstract":"<div><div>The current research work was aimed to determine the macro- and micromorphological characters of seeds in <em>Noccaea</em> s.l. members and evaluate the potential phylogenetic utility of the seed coat character. Forty-two of the ca. 136 <em>Noccaea</em> s.l. species and one species of <em>Thlaspi</em> from 57 different accessions were investigated using light microscopy (LM) and scanning electron microscopy. Phylogenetic analysis was conducted by using internal transcribed spacer (ITS) DNA sequences obtained from NCBI.</div><div>SEM studies revealed eight types (areolate, colliculate, ocellate, papillate, reticulate, ruminate, tuberculate and verrucate) of sculpture on the surface of the seeds and these types were found in species across different clades of the phylogenetic tree, indicating that the seed coat patterns of the examined specimens exhibit significant convergence. Our results revealed that the only synapomorphic characteristic for members of <em>Noccaea</em> s.l. is their non-ribbed seed surface, in contrast to the ribbed seed surface found in <em>T. arvense.</em></div><div>This research suggests that macro- and micromorphological characteristics of seeds are typically specific to individual species rather than to entire genera. Therefore, generic classifications based solely on seed characters may lead to inaccurate phylogenetic conclusions.</div></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":"328 ","pages":"Article 152746"},"PeriodicalIF":1.7,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative anatomy of the gynoecia of Iris species (Iridaceae) with different degrees of longitudinal fusion of the carpels 不同心皮纵向融合程度的鸢尾属植物雌蕊的比较解剖学

IF 1.7 4区生物学

Flora Pub Date : 2025-04-25 DOI: 10.1016/j.flora.2025.152744

Jinyan Guo

{"title":"Comparative anatomy of the gynoecia of Iris species (Iridaceae) with different degrees of longitudinal fusion of the carpels","authors":"Jinyan Guo","doi":"10.1016/j.flora.2025.152744","DOIUrl":"10.1016/j.flora.2025.152744","url":null,"abstract":"<div><div>The gynoecia of <em>Iris</em> exhibit three different degrees of longitudinal fusion of the carpels. Most species, including <em>Iris pallida</em> Lam., have a very short stylar tube and three long tangentially flattened and broadened style branches. <em>Iris domestica</em> (L.) Goldblatt & Mabb. is the only species that has a very long stylar tube and three extremely reduced style branches. In three other species, including <em>Iris dichotoma</em> Pall., both the stylar tube and style branches are well developed, with the stylar tube occupying approximately one-third to half of the length of the style. Anatomical characteristics are compared for the gynoecia of these three species using serial transverse sections and light microscopy. Except the stylar crest, homologous regions of the main body of the carpel (MBC), stylar wings, stylar flaps, and stylar canals were found in the stylar tube and style branches of all three species. A conserved pattern of vascular distribution was found in the stylar tube and ovary, and vascular tissues were only found in the MBC of all three species. The style branches of these three species differ in terms of quantity and location of vascular branching. This study indicated that heterotopic development of the stylar tube and style branches may contribute to the evolution of three different types of gynoecia in <em>Iris</em>.</div></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":"328 ","pages":"Article 152744"},"PeriodicalIF":1.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of altitude on tree species diversity, structure and composition in a protected area of the Eastern Himalayas, Mizoram, India 海拔对印度米佐拉姆东喜马拉雅保护区树种多样性、结构和组成的影响

IF 1.7 4区生物学

Flora Pub Date : 2025-04-22 DOI: 10.1016/j.flora.2025.152741

Lalrinmuana, J. Lalbiaknunga, P.C. Lalbiaknii

{"title":"Influence of altitude on tree species diversity, structure and composition in a protected area of the Eastern Himalayas, Mizoram, India","authors":"Lalrinmuana, J. Lalbiaknunga, P.C. Lalbiaknii","doi":"10.1016/j.flora.2025.152741","DOIUrl":"10.1016/j.flora.2025.152741","url":null,"abstract":"<div><div>Deciphering the composition, structure, and diversity of tree communities is crucial for effective forest ecosystem conservation, particularly as climate change accelerates. However, basic knowledge of forest structure and composition remains limited in remote areas of the Eastern Himalayas. This study aimed to examine the diversity, structure, and composition of tree communities along an altitudinal gradient in Phawngpui National Park, Mizoram. The study site was stratified into three altitudinal zones: Low Altitude Forest (273–900 m), Mid Altitude Forest (900–1500 m), and High Altitude Forest (1500–2157 m). The data was collected using the random stratified sampling method. In each altitudinal zone, 40 plots of 100 m² were established, in which all individual trees having at least 10 cm DBH (diameter at breast height), which is 1.3 m above the ground, were measured and recorded in the field. A total of 107 tree species, distributed among 78 genera and 39 families, were recorded. The family Fagaceae and its species <em>Castanopsis tribuloides</em> dominated the forest. The non-metric multidimensional scaling (NMDS) analysis showed that species composition varied across altitudinal zones. Stem density, basal area, and stem DBH were highest in the MAF zone. Size class distribution showed a reverse J-shaped curve, indicating uneven-aged forest. Species richness and diversity exhibited a hump-shaped pattern. While alpha diversity followed a unimodal pattern, beta diversity exhibited a contrasting trend. This study will help understand the relationship between forest attributes and altitude, enhancing the design of efficient conservation and management plans.</div></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":"327 ","pages":"Article 152741"},"PeriodicalIF":1.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Plant diversity decrease and directional species turnover induced by shifting overstory dominance in the oak-hornbeam forest reserve over 50 years 50年来栎树角木保护区植被优势度变化导致的植物多样性下降和物种定向更替

IF 1.7 4区生物学

Flora Pub Date : 2025-04-22 DOI: 10.1016/j.flora.2025.152742

Janez Kermavnar, Lado Kutnar

{"title":"Plant diversity decrease and directional species turnover induced by shifting overstory dominance in the oak-hornbeam forest reserve over 50 years","authors":"Janez Kermavnar, Lado Kutnar","doi":"10.1016/j.flora.2025.152742","DOIUrl":"10.1016/j.flora.2025.152742","url":null,"abstract":"<div><div>Due to a long history of various anthropogenic pressures, lowland forest reserves are scarce and lack historical datasets suitable for analysing long-term vegetation trends. This study investigated changes in plant diversity and species composition in the long-untouched Krakovo forest reserve, the only preserved remnant of lowland oak-hornbeam forests with primary status in Slovenia. The original vegetation sampling was conducted in the 1970s. In 2024, we resurveyed 30 semi-permanent plots capturing the natural variation in soil moisture gradient. We found the decline of <em>Quercus robur</em> in the upper tree layer and the expansion of shade-casting tree <em>Carpinus betulus</em> in the lower tree layer, a pattern mainly attributed to the lowering of the groundwater table. This shift in overstory dominance manifested in a directional change of herb-layer composition associated with high species turnover (61 %). The deterioration of light conditions at the forest floor resulted in significant decrease of species richness, accompanied by the process of taxonomic homogenization. The analysis of Ellenberg indicator values revealed a reorganization of the plant communities in response to the increasingly shaded and cooler understory environment, benefitting a limited number of perennial herbs preferring closed canopies. The change towards nutrient-demanding species was probably caused by improved litter quality, nitrogen input from agricultural areas and nutrient release from accumulated deadwood. In terms of soil moisture, the reserve still exhibits a mosaic of interchanging distribution between wetter and more mesic habitats. However, given that oak natural regeneration is very poor, we anticipate even more drastic vegetation changes in the future.</div></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":"327 ","pages":"Article 152742"},"PeriodicalIF":1.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metabolite analysis indicates role of flavones and free fatty acids in water deficit stress response of Cenchrus spinifex 代谢物分析表明黄酮类化合物和游离脂肪酸在香梨水分亏缺胁迫反应中的作用

IF 1.7 4区生物学

Flora Pub Date : 2025-04-21 DOI: 10.1016/j.flora.2025.152729

Jing Cao , Zhensong Li , Thomas A. Monaco , Yuping Rong

{"title":"Metabolite analysis indicates role of flavones and free fatty acids in water deficit stress response of Cenchrus spinifex","authors":"Jing Cao , Zhensong Li , Thomas A. Monaco , Yuping Rong","doi":"10.1016/j.flora.2025.152729","DOIUrl":"10.1016/j.flora.2025.152729","url":null,"abstract":"<div><div>Each spiny bur of <em>Cenchrus spinifex</em> Cav. (field sandbur) typically contains two seeds: a relatively large seed resembling a mango (M-type seed), and a relatively small seed resembling a pear (P-type seed). Metabolic variations arising from seed heteromorphism are regarded as crucial adaptive strategies enabling plants to thrive in unpredictable conditions. Nevertheless, metabolic studies on <em>C. spinifex</em> remain scarce. In this study, we utilized an untargeted metabolomics analysis by UHPLC-MS/MS to delineate the metabolic profiles associated with water deficit stress response in M- and P-type seedlings of <em>C. spinifex.</em> Seedlings were exposed to three watering regimes equating to 65–70 %, 45–50 %, and 25–30 % soil water-holding capacity. M-type seedlings prioritized root biomass allocation under stress, while P-type seedlings favored spikelet production, reflecting divergent survival–reproduction trade-offs. Metabolomic profiling revealed 43 differentially accumulated metabolites, with flavonoids as key discriminators between seedling types. In summary, <em>C. spinifex</em> exhibits pronounced metabolic divergence under water deficit stress, with flavonoids and free fatty acids serving as central adaptive metabolites. Crucially, flavonoids emerged as the key differential factor between M- and P-type seedlings. These findings demonstrate that seed heteromorphism in <em>C. spinifex</em> drives differential metabolic and allocation strategies, enhancing drought resilience and invasion success in arid environments.</div></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":"327 ","pages":"Article 152729"},"PeriodicalIF":1.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geo-climatic factors and soil properties affect phenolic compound synthesis and antioxidant activities in Betula platyphylla in Northeast China 地理气候因素和土壤性质对东北白桦酚类化合物合成和抗氧化活性的影响

IF 1.7 4区生物学

Flora Pub Date : 2025-04-16 DOI: 10.1016/j.flora.2025.152731

Siru Guo , Haitong Liu , Qianru Ji , Shuang Wu , Shengfang Wang , Xiaochao Ji , Cholil Yun , Xiting Zhang , Wenjie Wang , Huimei Wang

{"title":"Geo-climatic factors and soil properties affect phenolic compound synthesis and antioxidant activities in Betula platyphylla in Northeast China","authors":"Siru Guo , Haitong Liu , Qianru Ji , Shuang Wu , Shengfang Wang , Xiaochao Ji , Cholil Yun , Xiting Zhang , Wenjie Wang , Huimei Wang","doi":"10.1016/j.flora.2025.152731","DOIUrl":"10.1016/j.flora.2025.152731","url":null,"abstract":"<div><div>Phenolic compounds, one of the most important bioactive compounds, are susceptible to environmental factors. White birch (<em>Betula platyphylla</em> Suk<em>.</em>) is a major commercial tree species in Northeast China, and its bark is rich in phenolic compounds. We explored the influences of environmental factors on the concentrations of total phenols and total flavonoids, and individual phenolic compounds and DPPH (1, 1-diphenyl-2-picrylhydrazyl) free radical scavenging activity of <em>B. platyphylla</em> from seven producing areas in Northeast China were evaluated. The data analysis demonstrated that there were obvious differences in phenolic compound concentrations and bioactivities of the <em>B. platyphylla</em> bark extract from different locations. The concentrations of phenolic compounds, including total phenols, total flavonoids, hyperoside, and chlorogenic acid, were found to be higher in cold and dry high-latitude regions. The extracts of <em>B. platyphylla</em> bark had high antioxidant activities and were closely related to soil properties and geo-climate. Redundancy analysis revealed that soil moisture content produced a greater effect on phenolic compounds in <em>B. platyphylla</em> bark than other environmental factors. The total phenol and total flavonoid concentrations were negatively correlated with longitude, soil moisture content, and precipitation of wettest quarter, while they were significantly positively correlated with latitude. This study highlighted that geo-climatic factors, particularly soil moisture content, play a critical role in regulating the biosynthesis of phenolic compounds and their antioxidant activities, thereby enhancing the adaptation of <em>B. platyphylla</em> to its natural environment.</div></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":"327 ","pages":"Article 152731"},"PeriodicalIF":1.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lianas exhibit lower leaf drought resistance than trees in both tropical dry and wet forests in Thailand 在泰国的热带干湿森林中，藤本植物表现出较低的叶片抗旱性

IF 1.7 4区生物学

Flora Pub Date : 2025-04-15 DOI: 10.1016/j.flora.2025.152730

Lu Han , Pimnara Tinprabat , Phisamai Maenpuen , Wirong Chanthorn , Dokrak Marod , Pantana Tor-ngern , Sathid Thinkampheang , Anuttara Nathalang , Warren Y. Brockelman , Shubin Zhang , Yajun Chen

{"title":"Lianas exhibit lower leaf drought resistance than trees in both tropical dry and wet forests in Thailand","authors":"Lu Han , Pimnara Tinprabat , Phisamai Maenpuen , Wirong Chanthorn , Dokrak Marod , Pantana Tor-ngern , Sathid Thinkampheang , Anuttara Nathalang , Warren Y. Brockelman , Shubin Zhang , Yajun Chen","doi":"10.1016/j.flora.2025.152730","DOIUrl":"10.1016/j.flora.2025.152730","url":null,"abstract":"<div><div>The abundance and diversity of tropical lianas have been increasing, particularly in forests experiencing seasonal drought. Leaf drought resistance is a critical leaf function associated with plant survival, growth, and reproduction. However, it remains debated whether leaf drought resistance between coexisting trees and lianas differs along gradients of water availability. In this study, we compared leaf pressure volume curves and leaf morphological traits of 78 co-occurring liana and tree species from two tropical seasonal forests with differing water availability in Thailand. We found that lianas showed a less negative (lower drought resistance) water potential at turgor loss (Ψ<sub>tlp</sub>) than co-occurring trees in both tropical dry and wet forests. Lianas and trees from the tropical dry forest exhibited a higher leaf drought resistance than those from the tropical wet forest. Overall, growth-form and site explained more variation in leaf drought resistance than phylogeny, indicating that leaf drought resistance is labile under contrasting water availability. When considering the effects of phylogeny, there is a correlated evolution of leaf drought resistance and morphological traits (e.g. leaf thickness, leaf mass per area, leaf density, and leaf dry mass content) across species. We conclude that lianas have lower leaf drought resistance compared to co-occurring trees in both tropical dry and wet forests. Further studies are necessary to examine how these trait differences between co-occurring lianas and trees change along a broader aridity gradient.</div></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":"327 ","pages":"Article 152730"},"PeriodicalIF":1.7,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0