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

Observed vegetation changes in Danish dry heathlands since 2004 自 2004 年以来丹麦干旱热地的植被变化观测结果

IF 1.7 4区生物学

Flora Pub Date : 2025-04-11 DOI: 10.1016/j.flora.2025.152728

Christian Damgaard

引用次数: 0

Nectar characteristics and pollination ecology of Camellia perpetua in South China 中国南方永久山茶的花蜜特征及传粉生态学

IF 1.7 4区生物学

Flora Pub Date : 2025-04-04 DOI: 10.1016/j.flora.2025.152727

Hai-du Jiang , Dan-juan Zeng , Hui-zhen Qin , Li-hui Peng , Yi-shan Yang , Zong-you Chen , Rong Zou , Jian-min Tang , Yun-sheng Jiang , Zhong-chen Xiong , Xiao Wei , Sheng-feng Chai

{"title":"Nectar characteristics and pollination ecology of Camellia perpetua in South China","authors":"Hai-du Jiang , Dan-juan Zeng , Hui-zhen Qin , Li-hui Peng , Yi-shan Yang , Zong-you Chen , Rong Zou , Jian-min Tang , Yun-sheng Jiang , Zhong-chen Xiong , Xiao Wei , Sheng-feng Chai","doi":"10.1016/j.flora.2025.152727","DOIUrl":"10.1016/j.flora.2025.152727","url":null,"abstract":"<div><div>Temporal variation in floral nectar properties and their effects on reproductive success in plants that flower from winter to summer remain poorly understood. <em>Camellia perpetua</em> (Theaceae) blooms almost year-round in the karst regions of Guangxi, South China. Nectar characteristics and pollinator visits were observed in two populations: in the Guilin Botanical Garden (GBG) and PaiRu Village, Chongzuo White-Headed Langur National Reserve (PRV). Nectar is secreted in the buds of <em>C. perpetua</em> approximately 4–5 h before opening. The total nectar volume per flower was higher in winter (453.66 ± 4.67 μL) than in summer (129.14 ± 4.48 μL). Nectar secretion decreased during the day but increased in the evening. The amount of sucrose /(fructose + glucose) ratio was significantly higher in winter (49.69 ± 2.56) than in summer (6.99 ± 0.42). The glutamic acid content was higher in summer than in winter. During the summer and winter flowering seasons, birds (<em>Aethopyga christinae</em> [the fork-tailed sunbird] in the GBG and PRV) and three bee species (in the GBG: <em>Apis cerana, Apis mellifera ligustica</em>, and <em>Nomia chalybeata</em>) were the primary visitors. The frequency of birds visiting flowers, fruit and seed set was significantly higher in winter than in summer in both populations. Furthermore, the seed set was significantly higher in PRV than in the GBG. The higher floral visitation rates by birds during winter compared to summer were associated with a larger volume and higher proportion of sucrose in the nectar during that season. This seasonal differentiation in floral nectar traits seemed to be associated with different pollinator functional groups. However, further studies are needed to determine whether factors other than the variation in nectar traits, such as temperature, play a role.</div></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":"327 ","pages":"Article 152727"},"PeriodicalIF":1.7,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823607","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

Distribution and morphological differentiation of native alder taxa (Alnus Mill.) in the Iberian Peninsula 伊比利亚半岛原生桤木分类群（Alnus Mill.）的分布和形态分化

IF 1.7 4区生物学

Flora Pub Date : 2025-04-03 DOI: 10.1016/j.flora.2025.152723

Macarena Cuerdo , José Ignacio Márquez-Corro , Francisco Lara , Ricardo Garilleti , Ilia J. Leitch , Eduardo Cires , David G. del Olmo , Alba Romero , Carmen Andrés , Eduardo Ballesteros , Álvaro Prado , Juan A. Calleja

{"title":"Distribution and morphological differentiation of native alder taxa (Alnus Mill.) in the Iberian Peninsula","authors":"Macarena Cuerdo , José Ignacio Márquez-Corro , Francisco Lara , Ricardo Garilleti , Ilia J. Leitch , Eduardo Cires , David G. del Olmo , Alba Romero , Carmen Andrés , Eduardo Ballesteros , Álvaro Prado , Juan A. Calleja","doi":"10.1016/j.flora.2025.152723","DOIUrl":"10.1016/j.flora.2025.152723","url":null,"abstract":"<div><div>The riparian environments of Europe host a remarkable richness of plant communities, often dominated by a single tree species. Understanding the identity of this species, including its morphology and distribution, is essential for the effective management and conservation of biodiversity. In Iberian alder forests, <em>Alnus lusitanica</em> Vít, Douda & Madák appears to be more common than <em>Alnus glutinosa</em> (L.) Gaertn., which dominates most of western Europe. Previous studies based on limited sampling suggested <em>A. lusitanica</em> was widespread in the western and southern Iberian Peninsula, while <em>A. glutinosa</em> was scattered in the Pyrenees and across the Cantabrian Range. Although some morphological differences have been observed, the two species are mainly differentiated by their ploidy levels: <em>A. lusitanica</em> is tetraploid, and <em>A. glutinosa</em> is diploid.</div><div>This study aims to document the detailed distribution and morphological differentiation between <em>A. lusitanica</em> and <em>A. glutinosa</em> in the Iberian Peninsula, and determine whether putative hybrids (triploids) exist. Fresh and herbaria samples covering the entire Iberian range of <em>Alnus</em>, plus others from Europe, were collected. Ploidy levels were determined by flow cytometry. A morphometric study was also carried out with 26 variables and ratios. The results indicate that <em>A. glutinosa</em> is more widespread than previously reported and no triploid hybrids were detected. The distinction from <em>A. lusitanica</em> can be made using a set of characters. These are described in a new identification key that successfully identifies 87.5% of specimens.</div></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":"326 ","pages":"Article 152723"},"PeriodicalIF":1.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760882","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

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