Annals of botany最新文献

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Transcriptional signatures associated with waterlogging stress responses and aerenchyma formation in barley root tissue. 大麦根组织内涝胁迫响应和通气组织形成的转录特征。
IF 3.6 2区 生物学
Annals of botany Pub Date : 2025-06-18 DOI: 10.1093/aob/mcaf104
Orla L Sherwood, Rory Burke, Jennifer O'Rourke, Conor V Whelan, Frances Downey, Louise Ryan, Eoin F McCabe, Zixia Huang, Carl K Y Ng, Paul F McCabe, Joanna Kacprzyk
{"title":"Transcriptional signatures associated with waterlogging stress responses and aerenchyma formation in barley root tissue.","authors":"Orla L Sherwood, Rory Burke, Jennifer O'Rourke, Conor V Whelan, Frances Downey, Louise Ryan, Eoin F McCabe, Zixia Huang, Carl K Y Ng, Paul F McCabe, Joanna Kacprzyk","doi":"10.1093/aob/mcaf104","DOIUrl":"https://doi.org/10.1093/aob/mcaf104","url":null,"abstract":"<p><strong>Background and aims: </strong>The frequency of extreme precipitation events is predicted to increase due to climate change, leading to soil waterlogging and crop yield losses, particularly in the case of susceptible species such as barley (Hordeum vulgare). Aerenchyma formation is a key morphological adaptation to waterlogging stress and hypoxic conditions, however, its genetic regulation in barley remains largely unresolved. The aim of this study was to address this knowledge gap and characterize the transcriptional signatures associated with waterlogging stress response and aerenchyma formation in barley roots.</p><p><strong>Methods: </strong>Two barley cultivars (Franklin and Yerong) were subjected to waterlogging stress, followed by analysis of phenotypic traits including root aerenchyma formation, and transcriptomic profiling of root tissue. Differential gene expression analysis and gene regulatory network construction were carried out using generated RNA-seq datasets.</p><p><strong>Key results: </strong>Performed analyses identified genes transcriptionally responsive to 24 and 72 h of waterlogging in both cultivars, and highlighted metabolic adaptations, regulation of ROS signalling and management of stress responses as key elements of the waterlogging response in barley roots. Large intra-individual variation was observed for root aerenchyma formation. This variation was exploited to identify 81 candidate aerenchyma-associated genes and ascertain pathways involved in aerenchyma formation. Further, network analyses suggested that DNA damage response gene, DRT100 and cell wall modifying genes: XTH16, XTH15 are regulatory hub genes in aerenchyma formation.</p><p><strong>Conclusions: </strong>This study provides new insights into transcriptional signatures associated with waterlogging responses and aerenchyma formation in barley roots. Identified candidate aerenchyma associated genes offer new targets for future research and breeding efforts aimed at enhancing waterlogging tolerance in this crop species.</p>","PeriodicalId":8023,"journal":{"name":"Annals of botany","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Leaf manganese concentrations reveal phosphorus-mining strategies and trait diversification of Myrtaceae in south-eastern Australia. 叶片锰浓度揭示了澳大利亚东南部桃金娘科植物的采磷策略和性状多样化。
IF 3.6 2区 生物学
Annals of botany Pub Date : 2025-06-17 DOI: 10.1093/aob/mcaf129
Li Yan, Patrick E Hayes, Francis J Nge, Erin I E Rogers, Ian J Wright, Kosala Ranathunge, David S Ellsworth, Hans Lambers
{"title":"Leaf manganese concentrations reveal phosphorus-mining strategies and trait diversification of Myrtaceae in south-eastern Australia.","authors":"Li Yan, Patrick E Hayes, Francis J Nge, Erin I E Rogers, Ian J Wright, Kosala Ranathunge, David S Ellsworth, Hans Lambers","doi":"10.1093/aob/mcaf129","DOIUrl":"https://doi.org/10.1093/aob/mcaf129","url":null,"abstract":"<p><strong>Background and aims: </strong>Phosphorus (P)-impoverished soils shape plant adaptation in biodiverse ecosystems worldwide, from Australian heathlands to Amazonian rainforests to southern China's karst regions. While non-mycorrhizal lineages like Proteaceae and Cyperaceae use carboxylate exudation that mobilise P, and are celebrated for such strategies, the mechanisms allowing mycorrhizal Myrtaceae-especially eucalypts-to thrive in these soils without fungal assistance remain unclear. Given Myrtaceae's dominance in P-impoverished Australian ecosystems, a key question arises: How do mycorrhizal plants succeed in P-impoverished environments without relying on fungal symbiosis? We challenge the paradigm that carboxylate-driven P acquisition is exclusive to non-mycorrhizal species.</p><p><strong>Methods: </strong>Using leaf manganese concentrations ([Mn]) as a proxy for carboxylate exudation, we assessed trait diversification across Myrtaceae genera. We collected leaf and soil samples from 34 species of eucalypt (Angophora, Blakella, Corymbia, Eucalyptus) and other Myrtaceae from 18 sites in south-eastern Australia.</p><p><strong>Key results: </strong>Our findings reveal consistently high leaf [Mn] in many Myrtaceae, comparable to that in known carboxylate-releasing species, indicating intensive P mining. This suggests convergent evolution of carboxylate exudation in mycorrhizal Myrtaceae, fundamentally reshaping our understanding of nutrient acquisition in symbiotic plants. Significant interspecific variation was observed, with Angophora showing markedly higher [Mn] than Eucalyptus, suggesting divergent P-acquisition strategies within Myrtaceae. Weak phylogenetic signals for leaf [Mn] and [P] in eucalypts imply repeated evolutionary change in these traits, similar to what is known in other Australian species adapted to P scarcity.</p><p><strong>Conclusions: </strong>By demonstrating carboxylate-driven P mining in mycorrhizal Myrtaceae, we redefine the mechanisms behind their dominance in low-P environments. Trait diversity-linked to variation in carboxylate-mediated P acquisition and plant-soil feedbacks-likely drives niche differentiation and genus-level distribution across south-eastern Australia. Connecting leaf [Mn] to carboxylate-driven P mining advances our understanding of trait evolution in Myrtaceae and provides a framework for predicting plant-soil interactions in P-impoverished ecosystems globally.</p>","PeriodicalId":8023,"journal":{"name":"Annals of botany","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 life without leaves, roots, or stems: anatomy, development, and 3D structure of the endoparasite Pilostyles blanchetii (Apodanthaceae) in Mimosa hosts. 无叶、无根、无茎的植物生命:含羞草寄主内寄生毛蕊毛蕊的解剖、发育和三维结构。
IF 3.6 2区 生物学
Annals of botany Pub Date : 2025-06-17 DOI: 10.1093/aob/mcaf127
Gregorio Ceccantini, Marina M Amaral, Luiza Teixeira-Costa
{"title":"Plant life without leaves, roots, or stems: anatomy, development, and 3D structure of the endoparasite Pilostyles blanchetii (Apodanthaceae) in Mimosa hosts.","authors":"Gregorio Ceccantini, Marina M Amaral, Luiza Teixeira-Costa","doi":"10.1093/aob/mcaf127","DOIUrl":"https://doi.org/10.1093/aob/mcaf127","url":null,"abstract":"<p><strong>Background and aims: </strong>The vegetative body of Pilostyles (Apodanthaceae) is highly reduced, composed of cell clusters that occupy the bark of the host plant. From these clusters, tracheary elements connect with the host vascular system during the parasite reproductive stages. We analyze the developmental morphology of P. blanchetii to better understand its growth within the host body, as well as xylem and phloem connections between the two plants, providing new interpretations about the parasite's life history.</p><p><strong>Methods: </strong>Iodine and lead contrasting solutions were perfused through samples of parasitized host material before microtomography scanning to facilitate posterior virtual segmentation of parasite structures within host tissues. Samples were then prepared for light, fluorescence, and confocal microscopy to analyze xylem and phloem connections between parasite and host plants.</p><p><strong>Key results: </strong>We detected the presence of parasitic tissue within the host body before flower meristem differentiation and reveal the interconnectedness of the parasitic endophyte. Parasite-host xylem connections are mediated by highly modified vessels elements differentiated in the parasite sinkers. Within the host bark, the parasite develops small sieve tube elements lacking companion cells.</p><p><strong>Conclusions: </strong>Pilostyles blanchetii develops an extensive tissue network within the bark of its hosts, linking pistillate and staminate flowers, thus suggesting monoecy. Vascular tissue is extremely reduced and includes only vessel elements for the xylem and sieve tube elements for the phloem, which connect directly to the corresponding cells of the host.</p>","PeriodicalId":8023,"journal":{"name":"Annals of botany","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Resolving relationships in the radiation of Australia's largest pea clade (Fabaceae tribe Mirbelieae) with target-capture sequencing. 用目标捕获测序解决澳大利亚最大的豌豆分支(豆科部落Mirbelieae)辐射中的关系。
IF 3.6 2区 生物学
Annals of botany Pub Date : 2025-06-17 DOI: 10.1093/aob/mcaf128
James A R Clugston, Russell L Barrett, Daniel J Murphy, Matthew A M Renner, Peter H Weston, Lyn G Cook, Peter C Jobson, Brendan J Lepschi, Michael D Crisp
{"title":"Resolving relationships in the radiation of Australia's largest pea clade (Fabaceae tribe Mirbelieae) with target-capture sequencing.","authors":"James A R Clugston, Russell L Barrett, Daniel J Murphy, Matthew A M Renner, Peter H Weston, Lyn G Cook, Peter C Jobson, Brendan J Lepschi, Michael D Crisp","doi":"10.1093/aob/mcaf128","DOIUrl":"https://doi.org/10.1093/aob/mcaf128","url":null,"abstract":"<p><strong>Background and aims: </strong>Tribe Mirbelieae (Fabaceae) represents one of the great species radiations in Australian flora and the largest in the pea-flowered legumes. Traditional amplicon sequencing has failed to resolve relationships within this species-rich and morphologically diverse tribe.</p><p><strong>Methods: </strong>Target capture sequencing was used to reconstruct relationships within the core Mirbelioid legumes which represent a previously hypothesised rapid radiation that dates to the Oligocene and early Miocene epochs.</p><p><strong>Key results: </strong>We recovered strongly supported deep nodes resolving relationships between all recognised genera and four novel clades based on 289 low-copy nuclear markers derived from the Angiosperms353 universal probe set. The taxonomically challenging genus Pultenaea was demonstrated to be polyphyletic. Minor changes are required in Aotus, Callistachys, Mirbelia, Oxylobium, Phyllota and Urodon.</p><p><strong>Conclusions: </strong>Phylogenomic data has robustly resolved relationships in a large legume clade where relationships long-feared irresolvable. This resolution enables the recognition of monophyletic genera within the tribe with only minimal taxonomic rearrangements. Critically, a new circumscription of Pultenaea supported by both phylogenomic and morphological data has now been achieved.</p>","PeriodicalId":8023,"journal":{"name":"Annals of botany","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
On the origin of euphyllophyte roots - hypotheses from an Early Devonian Psilophyton. 浅叶植物根的起源——来自早泥盆世一种裸生植物的假说。
IF 3.6 2区 生物学
Annals of botany Pub Date : 2025-06-13 DOI: 10.1093/aob/mcaf121
Jeffrey B Doran, Alexandru M F Tomescu
{"title":"On the origin of euphyllophyte roots - hypotheses from an Early Devonian Psilophyton.","authors":"Jeffrey B Doran, Alexandru M F Tomescu","doi":"10.1093/aob/mcaf121","DOIUrl":"https://doi.org/10.1093/aob/mcaf121","url":null,"abstract":"<p><strong>Background and aims: </strong>Rooting structures have been documented in different Early Devonian plants, including rhyniophytes and zosterophylls. However, the basal euphyllophytes - the plexus from which modern ferns, equisetophytes and seed plants evolved - are the only group with no known rooting structures in Early Devonian representatives. We revisit the early euphyllophyte Psilophyton crenulatum whose emergences have implications for rooting structure evolution within the clade.</p><p><strong>Methods: </strong>Well preserved Early Devonian (earliest Emsian) material from the Val d'Amour Formation in New Brunswick (Canada) was freed from the rock matrix using acid. Over 2000 emergences from 28 randomly selected P. crenulatum axes were characterized qualitatively and quantitatively in terms of morphology and distribution.</p><p><strong>Key results: </strong>The features of the emergences are more consistent with a rooting function than with any other possible role: irregular morphology, including forms with complex branching; anatomy involving external layers of thin-walled cells; apical meristematic growth that allowed for branching; terminations in filiform rhizoid-sized tips; and vertically polarized distribution, with nearly twice as many emergences on the lower sides of axes compared to the upper sides. The absence of any other potential rooting structures associated with P. crenulatum also supports a rooting function for the emergences.</p><p><strong>Conclusions: </strong>If the emergences of P. crenulatum had a rooting function, they are the oldest euphyllophyte rooting structures. They are also a novel, sui generis type of such structures among Early Devonian plants. They also provide the oldest direct evidence for gravity-induced morphological features in euphyllophytes. If they evolved from emergences like those of P. crenulatum, then euphyllophyte roots probably inherited from them apical growth and branching, and gene networks responsible for production of tip-growing filamentous cells. Progressive increase in size of such emergences could have increased auxin fluxes, leading to specification of vascular connections to subtending axes.</p>","PeriodicalId":8023,"journal":{"name":"Annals of botany","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144282140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Revealing programmed cell death events during flower (petal) senescence. 揭示花(花瓣)衰老过程中的程序性细胞死亡事件。
IF 3.6 2区 生物学
Annals of botany Pub Date : 2025-06-13 DOI: 10.1093/aob/mcaf105
Elena T Iakimova, Ernst J Woltering
{"title":"Revealing programmed cell death events during flower (petal) senescence.","authors":"Elena T Iakimova, Ernst J Woltering","doi":"10.1093/aob/mcaf105","DOIUrl":"https://doi.org/10.1093/aob/mcaf105","url":null,"abstract":"<p><strong>Background: </strong>Flower petals serve to attract pollinators and inherently have a short life span. The senescence of these plant parts is programmed in the flower's developmental plan. Also at the cellular level, petal cell death is highly programmed going through a number of different phases that culminate in cellular suicide (programmed cell death - PCD). The signalling, biochemical, molecular and gene determinants involved in the regulation of PCD and the morphological characteristics of the process in flower petals have to some extent been described. Still important issues of theoretical and practical significance related to PCD functioning and its contribution to petal deterioration remain unsolved.</p><p><strong>Scope: </strong>This review discusses the occurrence and role of PCD in petal senescence in models of ornamental plants. For comparison, the distinctive and common features of plant and animal PCD types are outlined. The two major plant cell death categories - vacuolar (V) PCD, reminiscent to animal autophagic PCD and apoptosis-like (AL) PCD, sharing features with animal apoptosis - and their ontribution to petal senescence are discussed.</p><p><strong>Conclusions: </strong>The findings indicate that cellular PCD is tightly connected to petal senescence and support the view that senescence is a specific form of developmental PCD (senescence/PCD), dominated by large scale autophagy and eventual breakdown of the vacuole membrane. Depending on the measured PCD markers, petal cell death is often characterized being either V-PCD or AL-PCD. However, alongside the ongoing V-PCD, in early or late stages of senescence, often AL-PCD-associated features are observed. This indicates that, in senescing petal cells, both PCD pathways operate in parallel and are presumably interconnected. The specific conditions may determine their relative contribution to cell death. The cell death cascade may, in general, start earlier in parenchyma than in epidermal cells. In a fully open, visibly non-senescent flower, a large part of the mesophyll cells may already have died or even disappeared, indicating that petal senescence is well on its way and cannot be reversed. Petal abscission may occur in both non-senescent and senescent petals and its regulation seems independent from petal PCD.</p>","PeriodicalId":8023,"journal":{"name":"Annals of botany","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144282141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Characterizing and distinguishing the earliest woody euphyllophytes based on secondary xylem anatomy: method development and application. 基于次生木质部解剖的最早木本植物的特征与区分:方法开发与应用。
IF 3.6 2区 生物学
Annals of botany Pub Date : 2025-06-13 DOI: 10.1093/aob/mcaf122
Emma Casselman, Alexandru M F Tomescu
{"title":"Characterizing and distinguishing the earliest woody euphyllophytes based on secondary xylem anatomy: method development and application.","authors":"Emma Casselman, Alexandru M F Tomescu","doi":"10.1093/aob/mcaf122","DOIUrl":"https://doi.org/10.1093/aob/mcaf122","url":null,"abstract":"<p><strong>Background and aims: </strong>The oldest vascular cambial growth (woody growth) has been recognized in several Early Devonian (ca. 410-395 Ma) euphyllophytes. Incomplete preservation of these fossils, in multiple cases, makes it difficult to evaluate their taxonomic diversity, in the absence of quantitative methods for distinguishing plants based on secondary xylem anatomy. In turn, this hinders understanding of their implications for the evolution of plant development. To develop and apply metrics that quantify secondary xylem anatomy and allow for conclusive comparisons, we investigated extant and Early Devonian fossil woody taxa.</p><p><strong>Methods: </strong>We developed multiple metrics for quantifying tracheid size as a function of position in the secondary xylem and tested them against a dataset of extant gymnosperm wood. The four metrics that showed consistent trends within taxa and captured differences among taxa were then applied to previously recognized Early Devonian fossil woody taxa and to previously undescribed Early Devonian woody specimens to compare them and evaluate taxonomic diversity and placement of the new fossils.</p><p><strong>Key results: </strong>The four new secondary xylem metrics, considered alongside other anatomical characters, differentiated the previously recognized Early Devonian taxa from each other, allowed assignment of two of the new fossils to the previously described species Franhueberia gerriennei and separated two new woody euphyllophyte taxa.</p><p><strong>Conclusions: </strong>The metrics developed here for quantifying secondary xylem anatomy are effective in demonstrating conspecificity and in separating distinct woody taxa, especially in combination with data on the primary xylem and xylem rays. They provide a new method for assessing the taxonomic placement of fossils with incomplete preservation, opening up a new avenue for exploring fossil plant diversity and for characterizing anatomy, with implications for the evolution of plant development.</p>","PeriodicalId":8023,"journal":{"name":"Annals of botany","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144282139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Murbeckiella is dead, long live Oreophyton - Origin and systematics of Tribe Oreophytoneae (Brassicaceae). Murbeckiella是死的,是活的苔藓植物——苔藓植物族(芸苔科)的起源与分类学。
IF 3.6 2区 生物学
Annals of botany Pub Date : 2025-06-11 DOI: 10.1093/aob/mcaf115
Nora Walden, Guilhem Mansion, Hektor Schnorf, Marcus A Koch, Alessia Guggisberg
{"title":"Murbeckiella is dead, long live Oreophyton - Origin and systematics of Tribe Oreophytoneae (Brassicaceae).","authors":"Nora Walden, Guilhem Mansion, Hektor Schnorf, Marcus A Koch, Alessia Guggisberg","doi":"10.1093/aob/mcaf115","DOIUrl":"https://doi.org/10.1093/aob/mcaf115","url":null,"abstract":"<p><strong>Background and aims: </strong>The small genus Murbeckiella from the Brassicaceae family underwent manifold taxonomic changes reflecting morphological uncertainties, but also unusual biogeographic distribution patterns ranging from Spain and northern Africa to Caucasus. Close relationships with Oreophyton have been proposed, and both genera have been placed in the orphan tribe Oreophytoneae. We explore phylogenetic relationships to unravel and revise present-day taxonomic treatments, propose a biogeographic framework and contribute to our understanding of the local endemic Murbeckiella omissa from France. For detecting putative hybrids and reticulate evolutionary patterns on polyploid level the newly introduced Paralog PhyloGenomics (PPG) approach has been tested.</p><p><strong>Methodology: </strong>Short-read whole-genome-sequencing (WGS) was used to map to a 1,000 nuclear gene target data. In addition, coding sequences from the plastome were extracted for phylogenetic reconstruction and divergence time estimates. The PPG approach was applied for phylogenetic reconstructions and evolutionary inference.</p><p><strong>Key findings: </strong>The PPG concept resolved phylogenetic relationships among diploids and polyploids successfully. Murbeckiella appeared poly- and paraphyletic and the majority of species have been taxonomically integrated into a newly defined genus Oreophyton. One single species, Murbeckiella sousae, is placed in a clade of distinct tribe Arabideae and is awaiting future taxonomic revision. Biogeographic evidence suggests an origin of the tribe in Anatolia or adjacent Levant with crown group diversification of the different species starting with the early Pleistocene.</p><p><strong>Conclusions: </strong>The genus Murbeckiella is a suitable system to apply WGS methods to unravel reticulate evolutionary histories of young species complexes. Its small genome allows deep sequencing at high quality, which may facilitate future studies illustrating the genomic footprints and genetic backgrounds of range expansion and transcontinental migration as well as adaptation in rapidly changing alpine environments.</p>","PeriodicalId":8023,"journal":{"name":"Annals of botany","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144265115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
An interlamellar lipophilic layer regulates hygroscopic movements in moss peristomes. 层间亲脂层调节苔藓表皮的吸湿运动。
IF 3.6 2区 生物学
Annals of botany Pub Date : 2025-06-11 DOI: 10.1093/aob/mcaf118
Mathilde Ruche, Michelle J Price, Fred W Stauffer, Anne Utz-Pugin, Cécile V K Weber, Lara Bois, Sylvain Loubéry
{"title":"An interlamellar lipophilic layer regulates hygroscopic movements in moss peristomes.","authors":"Mathilde Ruche, Michelle J Price, Fred W Stauffer, Anne Utz-Pugin, Cécile V K Weber, Lara Bois, Sylvain Loubéry","doi":"10.1093/aob/mcaf118","DOIUrl":"https://doi.org/10.1093/aob/mcaf118","url":null,"abstract":"<p><strong>Background and aims: </strong>The moss peristome regulates spore release via the hygroscopic movements of the articulated teeth over the capsule mouth. The presence of hydrophobic material inside the teeth has been sporadically reported, with different names and compositions proposed, and it was thought to cause hygroscopic movements. Here we investigated the origin, characteristics and function of this deposition, now termed the interlamellar lipophilic layer (ILL), with the aim of understanding it and its contribution to peristome hygroscopic movements.</p><p><strong>Methods: </strong>The ontogeny of the ILL in Dicranum scoparium was elaborated using histology and transmission electron microscopy. Histological, structural and physiological analyses of peristomes were conducted in 14 species of Bryopsida.</p><p><strong>Key results: </strong>The ILL is formed simultaneously with the deposition of secondary thickenings in the developing peristome. In mature peristomes, the ILL resembles the cuticular layer of plant cuticles. The ILL is present in peristomes with single and double rings of teeth and its absence in three species was confirmed. The responses of the teeth under dry and humid conditions combined with the presence or absence of the ILL led us to reconsider its influence on the hygroscopic movements.</p><p><strong>Conclusions: </strong>The presence of a polyester layer in moss peristome teeth is confirmed. We named it the interlamellar lipophilic layer (ILL). The absence of the ILL was revealed in three of the 14 species investigated. We confirm that hygroscopic movements occur when the ILL is present or absent. When the ILL is present the peristome teeth remain erect whereas when it is absent the teeth are reflexed. These findings led us to hypothesise that the ILL influences the amplitude of movements rather than causing them, playing a regulatory role in the gradual dispersal of spores. The species that lacked the ILL were xerophytic which may represent a novel spore dispersal strategy.</p>","PeriodicalId":8023,"journal":{"name":"Annals of botany","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144265114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
A gap and synergy analysis of the European Research Infrastructure (RI) ecosystem: advancing the novel GRACE-RI dedicated to Plant Genetic Resources. 欧洲研究基础设施(RI)生态系统的差距和协同分析:推进致力于植物遗传资源的新型GRACE-RI。
IF 3.6 2区 生物学
Annals of botany Pub Date : 2025-06-10 DOI: 10.1093/aob/mcaf092
Domenico De Paola, Francesca Taranto, Soraya Mousavi, Francesco Mercati, Wilma Sabetta, Marina Tumolo, Sharif Islam, Roland Pieruschka, Andrea Scaloni, Anne-Francoise Adam-Blondon, Lorenzo Maggioni, Sandra Goritschnig, Filippo Guzzon, Massimo Ianigro, Giovanni Giuseppe Vendramin, Giovanni Giuliano, Gabriele Bucci
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