Role of Apomixis in Perpetuation of Flowering Plants: Ecological Perspective

Sharma, Roopam; Bhat, Vishnu

doi:10.1007/978-981-15-4210-7_13

Cited by 4 publications

(3 citation statements)

References 92 publications

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“…This view was based on the assumption that apomixis is an irreversible, derived trait. However, our results suggest that transitions from apomixis to sexuality are very common in Limonium (Figure 5) and corroborate recent studies that support apomixis-to-sex reversals enabled by the usually facultative nature of apomixis in angiosperms (Hörandl et al, 2007;Hörandl and Hojsgaard, 2012;Hand and Koltunow, 2014;Hojsgaard et al, 2014;Hojsgaard and Hörandl, 2015;Carman et al, 2019;Sharma and Bhat, 2020). While the result that transitions from apomixis to sexuality are more common than vice versa is strongly supported for both MCC trees in Limonium, it should be interpreted with caution because the limited phylogenetic resolution in the "Mediterranean lineage" could affect the inferred transition rates.…”

Section: Apomixis As a Biotic Driver Of Diversification And The Interplay Between Biotic And Abiotic Factors In Bolstering Diversificatiosupporting

confidence: 92%

Geo-Climatic Changes and Apomixis as Major Drivers of Diversification in the Mediterranean Sea Lavenders (Limonium Mill.)

et al. 2021

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The Mediterranean realm, comprising the Mediterranean and Macaronesian regions, has long been recognized as one of the world’s biodiversity hotspots, owing to its remarkable species richness and endemism. Several hypotheses on biotic and abiotic drivers of species diversification in the region have been often proposed but rarely tested in an explicit phylogenetic framework. Here, we investigate the impact of both species-intrinsic and -extrinsic factors on diversification in the species-rich, cosmopolitan Limonium, an angiosperm genus with center of diversity in the Mediterranean. First, we infer and time-calibrate the largest Limonium phylogeny to date. We then estimate ancestral ranges and diversification dynamics at both global and regional scales. At the global scale, we test whether the identified shifts in diversification rates are linked to specific geological and/or climatic events in the Mediterranean area and/or asexual reproduction (apomixis). Our results support a late Paleogene origin in the proto-Mediterranean area for Limonium, followed by extensive in situ diversification in the Mediterranean region during the late Miocene, Pliocene, and Pleistocene. We found significant increases of diversification rates in the “Mediterranean lineage” associated with the Messinian Salinity Crisis, onset of Mediterranean climate, Plio-Pleistocene sea-level fluctuations, and apomixis. Additionally, the Euro-Mediterranean area acted as the major source of species dispersals to the surrounding areas. At the regional scale, we infer the biogeographic origins of insular endemics in the oceanic archipelagos of Macaronesia, and test whether woodiness in the Canarian Nobiles clade is a derived trait linked to insular life and a biotic driver of diversification. We find that Limonium species diversity on the Canary Islands and Cape Verde archipelagos is the product of multiple colonization events followed by in situ diversification, and that woodiness of the Canarian endemics is indeed a derived trait but is not associated with a significant shift to higher diversification rates. Our study expands knowledge on how the interaction between abiotic and biotic drivers shape the uneven distribution of species diversity across taxonomic and geographical scales.

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Section: Apomixis As a Biotic Driver Of Diversification And The Interplay Between Biotic And Abiotic Factors In Bolstering Diversificatiosupporting

confidence: 92%

Geo-Climatic Changes and Apomixis as Major Drivers of Diversification in the Mediterranean Sea Lavenders (Limonium Mill.)

et al. 2021

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“…The persisting genera with an enormous number of species is therefore appearing as an arbitrary balance between practical convenience and true underlying phylogenetic pattern, rather than reflect properly the evolutionary differentiation. In botany, the existence of the genera with a really enormous number of species probably also due to the peculiarities of the biology of plants, per se, presence less differentiated than in animals' characters, and also often a well-defined clonal reproduction which promote an almost "infinite" number of microspecies and other processes that may influence the taxonomic decisions (e.g., Sharma & Bhat, 2020). Despite on that, in the botany, there is also argumentation on necessity of the much higher number of genera (e.g., Schuettpelz et al, 2018).…”

Section: Hidden Species Problem Promotes Fine-scale Taxonomic Differe...mentioning

confidence: 99%

Narrowly defined taxa on a global scale: The phylogeny and taxonomy of the genera Catriona and Tenellia (Nudibranchia, Trinchesiidae) favours fine‐scale taxonomic differentiation and dissolution of the “lumpers & splitters” dilemma

Korshunova

Lundin

Malmberg

et al. 2023

Evolutionary Applications

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By applying morphological and molecular data on two genera of the nudibranch molluscs it is shown that the tension between taxonomic practice and evolutionary processes persists. A review of the related genera Catriona and Tenellia is used to demonstrate that the fine‐scale taxonomic differentiation is an important tool in the integration of morphological and molecular data. This is highlighted by the hidden species problem and provides strong argument that the genus must be kept as a maximally narrowly‐defined entity. Otherwise, we are forced to compare a highly disparate species under the putatively lumped name “ Tenellia ”. We demonstrate this in the present study by applying a suite of delimitation methods and describing a new species of Tenellia from the Baltic Sea. The new species possesses fine‐scale morphological distinguishing features, which were not investigated before. The true, narrowly defined genus Tenellia represents a peculiar taxon with a clearly expressed paedomorphic characters and predominantly brackish‐water habitats. The phylogenetically related genus Catriona , of which three new species are described here, clearly demonstrates different features. A lumping decision to call many morphologically and evolutionary different taxa as “ Tenellia ” will downgrade the taxonomic and phylogenetic resolution of the entire family Trinchesiidae to just a single genus. The dissolution of the dilemma of “lumpers & splitters”, which still significantly affects taxonomy, will further help to make systematics a true evolutionary discipline.

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“…Plant breeders and crop geneticists will be enriched by Chaps. 8,11,12,13,and 15. Chapters 2,14,and 16 are of wide interest, focusing on the impact of climate change, the availability of pollinators and seed-dispersing birds, and the accomplishment of plant reproduction.…”

Section: Forewordmentioning

confidence: 99%

Reproductive Ecology of Flowering Plants: Patterns and Processes

Tandon¹,

Shivanna²,

Koul³

2020

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Role of Apomixis in Perpetuation of Flowering Plants: Ecological Perspective

Cited by 4 publications

References 92 publications

Geo-Climatic Changes and Apomixis as Major Drivers of Diversification in the Mediterranean Sea Lavenders (Limonium Mill.)

Geo-Climatic Changes and Apomixis as Major Drivers of Diversification in the Mediterranean Sea Lavenders (Limonium Mill.)

Narrowly defined taxa on a global scale: The phylogeny and taxonomy of the genera Catriona and Tenellia (Nudibranchia, Trinchesiidae) favours fine‐scale taxonomic differentiation and dissolution of the “lumpers & splitters” dilemma

Reproductive Ecology of Flowering Plants: Patterns and Processes

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