Development and evolution of the Asteraceae capitulum

New Phytologist, Journal Year: 2024, Volume and Issue: 242(1), P. 33 - 48

Published: Feb. 15, 2024

Asteraceae represent one of the largest and most diverse families plants. The evolutionary success this family has largely been contributed to their unique inflorescences, capitula that mimic solitary flowers but are typically aggregates multiple florets. Here, we summarize recent molecular genetic level studies have promoted our understanding development evolution capitula. We focus on new results patterning enlarged meristem resulting in iconic phyllotactic arrangement florets Fibonacci numbers spirals. also current networks regulating characteristic reproductive traits such as floral dimorphism differentiation highly specialized organs. So far, developmental still limited a very narrow selection model species. Along with advancements genomics phylogenomics, its relatives provide an outstanding clade for extended evo-devo exploit morphological diversity underlying translate knowledge breeding key crops family.

Language: Английский

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Insights into comparative genomics, structural features, and phylogenetic relationship of species from Eurasian Aster and its related genera (Asteraceae: Astereae) based on complete chloroplast genome

Frontiers in Plant Science, Journal Year: 2024, Volume and Issue: 15

Published: April 26, 2024

L. is an economically and phylogenetically important genus in the tribe Astereae. Here, complete plastomes of eight

Language: Английский

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Seed dormancy in Asteraceae: a global vegetation zone and taxonomic/phylogenetic assessment

Seed Science Research, Journal Year: 2023, Volume and Issue: 33(2), P. 135 - 169

Published: April 17, 2023

Abstract The Asteraceae with up to 30,000 species occurs on all continents except Antarctica and in major vegetation zones earth. Our primary aim was consider cypselae dormancy-break germination of relation ecology, evolution. Cypselae are desiccation-tolerant various tribes, genera, life forms either non-dormant (ND) or have non-deep physiological dormancy (PD) at maturity. All six types PD found among the Asteraceae, is broken by cold warm stratification afterripening. Soil banks may be formed but mostly short-lived. Much within-species variation has been found. Using data compiled for 1192 373 genera 35 tribes we considered ND form, zone tribe. Senecioneae Astereae had best representation across In evergreen semi-evergreen rainforests, more than PD, other zones, alpine/high-latitude tundra (where equal), ND. Tribes basal central grades those Heliantheae Alliance both PD. high diversity lability enhanced rate diversification promoting survival new and/or habitats that became available following globally disruptive events since origin Late Cretaceous.

Language: Английский

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South America holds the greatest diversity of native daisies (Asteraceae) in the world: an updated catalogue supporting continental-scale conservation

Frontiers in Plant Science, Journal Year: 2024, Volume and Issue: 15

Published: May 30, 2024

Asteraceae is the world’s richest plant family and found on all continents, in environments ranging from coast to highest mountains. The shows growth forms and, as other angiosperm families, species richness concentrated tropical regions. South America has diversity of world, yet taxonomic distributional knowledge gaps remain. This study compiles an updated catalog native America, based national regional checklists ongoing large-scale flora projects. resulting checklist includes a total 6,940 564 genera date, which represent about quarter family’s global diversity. Countries already considered be megadiverse show greatest diversity, such Brazil with 2,095 species, followed by Peru (1,588), Argentina (1,377), Colombia (1,244), this mainly focused Brazilian Highlands Andes. Species endemism also peaks Brazil, but Sørensen distances reveal Chilean eminently different rest continent. Tribes better represented continent are Eupatorieae, Senecioneae Astereae, remarkably presence entirely American subfamilies representing earliest diverging lineages Asteraceae, Barnadesioideae, Wunderlichioideae, Famatinanthoideae, Stifftioideae. It estimated that discovery description curves have not stabilized, number likely increase 5 10% coming years, posing major challenges continental-scale conservation.

Language: Английский

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Let’s pluck the daisy: dissection as a tool to explore the diversity of Asteraceae capitula

Botanical Journal of the Linnean Society, Journal Year: 2023, Volume and Issue: 201(4), P. 391 - 399

Published: Jan. 30, 2023

Abstract Asteraceae, the daisy family, are one of most diverse families angiosperms and predominant in many ecosystems, including grasslands, deserts, savannas high-elevation mountains. They characterized by a peculiar inflorescence, capitulum, which mimics flower, but is actually made up tightly grouped florets. The capitulum considered key character underpinning impressive evolutionary success it plays pivotal role economic importance given that species cultivated for their agricultural horticultural purposes. However, to date, there still no comprehensive understanding extent morphological diversity capitula across lineages Asteraceae. This mainly due lack appropriate tools describing such complex condensed structure. To address problem, we present protocol characterizing full from any lineage involves making whole dissection fresh material; simple cost-effective requires relatively easy-to-transport equipment meaning can be done during fieldwork.

Language: Английский

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Reproductive Biology of Asteraceae on Oceanic Islands

The Botanical Review, Journal Year: 2023, Volume and Issue: 90(1), P. 67 - 108

Published: Dec. 14, 2023

Language: Английский

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Pollen morphology of Asteraceae from Garhwal Himalaya (Uttarakhand, India): part I

Palynology, Journal Year: 2024, Volume and Issue: 48(4)

Published: April 9, 2024

Palynotaxonomy is crucial for understanding plant evolution, biodiversity, and ecological history by systematically classifying identifying species based on pollen morphology. In addition, a regional flora precise identification in various applied fields of palynology, including melissopalynology, aeropalynology, forensic paleopalynology, copropalynology. this communication, we explore the morphology 28 Asteraceae, employing both light (LM) scanning electron microscopy (SEM). The results revealed that grains were monad, isopolar, radially symmetric, tricolporate, exhibited oblate-spheroidal to prolate-spheroidal shapes. infratectum was found be columellate, caveate, or noncaveate. supratectum echinate microechinate characteristics, with exine surface showing perforate, microreticulate, perforate regulate features. Among some species, lophate pattern observed, revealing two distinct variations: one characterized '15 lacunae type,' while other '21 type'. Some unusual variations observed aperture character among certain like occurrence tricolpate dimorphism due variation number. Light microscopic examination preliminary resolving columellar structure but it clearly showed double level columella species. A cluster analysis, incorporating qualitative quantitative features an artificial key have been set forth distinguish studied supplemented LM SEM micrographs. current findings enriched existing database Asteraceae could play important role not only palynotaxonomy also allied fields.

Language: Английский

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A phylogenomic approach to disentangling the evolution of the large and diverse daisy tribe Anthemideae (Asteraceae)

Journal of Systematics and Evolution, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 7, 2024

Abstract The daisy tribe Anthemideae Cass. is one of the largest and most diverse tribes within Asteraceae. We analyzed a data set including 61 out 111 genera, all but four 19 currently recognized subtribes (Inulantherinae, Lapidophorinae, Lonadinae, Vogtiinae) using targeted high‐throughput sequencing approach, first focused on tribe. followed different phylogenomic approaches, nuclear plastid data, as well additional analytical methods to estimate divergence times diversification rates, unravel evolutionary history classification this Our results reinforce phylogenetic backbone advanced in previous studies further reveal possible occurrence ancient hybridization events, capture, and/or incomplete lineage sorting (ILS), suggesting that complex processes have played an important role evolution also support merging subtribe Physmasperminae into Athanasiinae Matricariinae Anthemidinae clarify previously unresolved relationships. Furthermore, study provides insights biogeographic patterns by identifying three main groups: Southern African Grade, Asian Clade, circum‐Mediterranean Clade. These groups partially coincide with identified ones. Overall, research more detailed understanding improves its classification. emphasizes importance approaches for deciphering dynamics large plant lineages.

Language: Английский

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Diversity and functional differentiation of renewal buds in temperate herbaceous plants

New Phytologist, Journal Year: 2024, Volume and Issue: 244(1), P. 292 - 306

Published: Aug. 12, 2024

Spring regrowth in temperate perennials relies on renewal buds, which form a key component the shoot growth cycle. Still, we possess almost no information these is becoming more pressing with current climate change. Most existing studies concentrated easy-to-study aboveground buds of woody plants, whose morphology has largely been linked to frost protection. It not clear what extent findings apply also herbaceous species. We therefore examined protective traits and preformation winter 379 species herbs, tested how are distributed across phylogeny related other bud bank whole-plant traits. identified major gradient from few, large, highly preformed, scale-covered associated larger belowground storage organs deep soil, small, numerous, less naked near soil surface. Belowground herbs show several distinct strategies for survival spring that might affect their response changing early conditions. Renewal driven only by protection but apical meristem mechanical disturbance soil.

Language: Английский

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Pollen morphology and variability among Indian cultivars of Chrysanthemum morifolium and comparative analysis with genera of the Asteraceae family

Genetic Resources and Crop Evolution, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 27, 2024

Language: Английский

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