New insights into the phylogeny and evolution of Podocarpaceae inferred from transcriptomic data

Chen, Luo; Jin, Wei-Tao; Liu, Xinquan; Wang, Xiaoquan

doi:10.1016/j.ympev.2021.107341

Cited by 12 publications

(10 citation statements)

References 122 publications

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“…Hence, we classify the two families in the order Araucariales. In addition, we classified the family Podocarpaceae according to a recent phylogenomic study that resulted in robust intergeneric relationships within the family ( Chen et al., 2022 ).…”

Section: Recent Advancesmentioning

confidence: 99%

“…Clade color indicates subclasses. Relationships are basically according to recent gymnosperm phylogenies ( Lu et al., 2014 ; Ran et al., 2018a ; Stull et al., 2021 ), Cupressaceae ( Mao et al., 2010 , 2012 , 2019 ), Cycadales ( Condamine et al., 2015 ), Pinaceae ( Ran et al., 2018b ), Podocarpaceae ( Chen et al., 2022 ). …”

Section: An Updated Classificationmentioning

confidence: 99%

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Recent advances on phylogenomics of gymnosperms and a new classification

et al. 2022

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Section: Recent Advancesmentioning

confidence: 99%

Section: An Updated Classificationmentioning

confidence: 99%

Recent advances on phylogenomics of gymnosperms and a new classification

et al. 2022

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“…Whether the temporal congruence between our inferences from molecular phylogenies and the fossil record is coincidental is difficult to assess; a single new Jurassic Podocarpaceae fossil with a reduced seed cone would complicate the concordance between molecular reconstructions and the fossil record with regards to seed number, as would molecular trees with different estimated divergence ages. Indeed, inferred Podocarpaceae divergence dates do vary considerably among studies; several (Quiroga et al, 2016;Chen et al, 2022) estimate older ages than our analysis while others estimate younger dates (Biffin et al, 2012;Klaus and Matzke, 2020). In these studies, the earliest shifts to reduced cones (corresponding to shifts 1 and 2 in Figure 3C) would have most likely occurred either between the 10.3389/fevo.2022.1058746…”

Section: Discussionmentioning

confidence: 53%

“…Early to Late Jurassic (older inferred ages) or the middle to Late Cretaceous (younger ages). Taken at face value, the fossil record suggests that Jurassic splits between crown genera (e.g., Quiroga et al, 2016;Chen et al, 2022) are too old; with the exception of an undescribed possible Lepidothamnus from the mid-Cretaceous (Khan et al, 2022), the first fossils unambiguously assigned to extant genera appear only in the latest Cretaceous to Paleogene (Hill and Brodribb, 1999;Wilf, 2012;Wilf et al, 2017). On the other hand, the phylogenetic position of Jurassic and Cretaceous Podocarpaceae (e.g., Vishnu-Mittre, 1959;Archangelsky and Del Fueyo, 1989) is unresolved; they could in theory represent stem members of extant genera and it could then be argued that the Mesozoic fossil record is simply uninformative as to when deep divergences among extant clades and genera occurred.…”

Section: Discussionmentioning

confidence: 99%

“…Podocarpaceae have been the focus of many molecular phylogenetic studies (e.g., Kelch, 1998;Biffin et al, 2012;Knopf et al, 2012;Quiroga et al, 2016;Chen et al, 2022) which have generally split the group into a large clade of speciesrich, primarily tropical taxa (e.g., Dacrydium, Dacrycarpus, Podocarpus) sister to a more depauperate, primarily temperate "prumnopityoid" clade (Chen et al, 2022; Figure 2A), and both clades contain long-branched lineages often regarded as relictual (e.g., Lagarostrobus, Microstrobus, and Saxegothaea; Khan and Hill, 2021). However, most extant Podocarpaceae richness is inferred by dated phylogenies to be relatively recent, with species divergences concentrated in the Neogene (Leslie et al, 2012(Leslie et al, , 2018.…”

Section: Introductionmentioning

confidence: 99%

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Neontological and paleontological congruence in the evolution of Podocarpaceae (coniferales) reproductive morphology

Leslie

Benson²

2022

Front. Ecol. Evol.

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IntroductionPodocarpaceae are a diverse, primarily tropical conifer family that commonly produce large leaves and highly reduced, fleshy seed cones bearing large seeds. These features may result from relatively recent adaptation to closed-canopy angiosperm forests and bird-mediated seed dispersal, although determining precisely when shifts in leaf and seed cone morphology occurred is difficult due to a sparse fossil record and relatively few surviving deep lineages.MethodsWe compare the fossil record of Podocarpaceae with results from ancestral state reconstruction methods and correlated character models using neontological data and a previously published molecular time-tree.ResultsAncestral state reconstructions suggest that small leaves, small seeds, and multi-seeded cones are ancestral in crown Podocarpaceae, with reduced cones bearing few seeds appearing in the Early Cretaceous and the correlated evolution of large leaves and large seeds occurring from the Late Cretaceous onwards. The exact timing of these shifts based on neontological data alone are poorly constrained, however, and estimates of leaf and seed size are imprecise.DiscussionThe fossil record is largely congruent with results based on the molecular time-tree, but provide important constraints on the range of leaf and seed sizes that were present in Cretaceous Podocarpaceae and the time by which changes in cone morphology and seed size likely occurred. We suggest in particular that reduced seed cones appeared in the Early Cretaceous and are linked to the contemporaneous diversification of small bodied avialans (birds), with shifts to larger seed sizes occurring after the Cretaceous in association with the spread of closed-canopy angiosperm forests.

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Leaf dimorphism in Cupressus nootkatensis D. Don and Cupressus vietnamensis (Farjon & T.H. Nguyên) Silba (Cupressaceae) and its ecological and evolutionary significance

Dörken

Ladd

Parsons

2023

Trees

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Key message We examined the leaf structure of two basal Cupressus species with a distinct leaf dimorphism. Some foliar features are regarded as ancestral and it is suggested that drought adaptation was one of the important ecological drivers in the evolution of the Cupressus genus. Abstract Leaf morphology and anatomy of two Cupressus species, C. nootkatensis and C. vietnamensis, were investigated with classical paraffin technique and scanning electron microscopy (SEM). Like all Cupressus species these two are characterised by a dramatic change in the foliage. Juveniles have needle leaves first before they change abruptly to the mature scale leaf type. In C. vietnamensis, needle-leaved shoots occur next to scale-leaved ones even on mature trees, which is unique among today´s Cupressus species. Adults of C. nootkatensis develop only scale leaves throughout. In both taxa, the scale leaves show a distinct dimorphism between lateral and facial leaves, which are arranged in a flat spray; the foliate shoots are two-dimensionally flattened. These scale leaves show several xeromorphic features; e.g. strongly reduced leaf size, stomata with high, collar-like Florin rings, the presence of a distinct hypodermis as a continuous layer and well-developed transfusion tissue. The needle leaf type is found in Cunninghamia which is the basal member of the Cupressaceae and so is regarded as the ancestral condition and scale leaves as a derived one. Scale leaves are found in all the members of the cupressoid clade even within the basal taxa from mesic habitats. However scale leaves are a preadaptation to survival under xeric conditions and they are likely an evolutionary driver of the radiation of Cupressus into arid environments, as has also been the case in genera such a Callitris.

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New insights into the phylogeny and evolution of Podocarpaceae inferred from transcriptomic data

Cited by 12 publications

References 122 publications

Recent advances on phylogenomics of gymnosperms and a new classification

Recent advances on phylogenomics of gymnosperms and a new classification

Neontological and paleontological congruence in the evolution of Podocarpaceae (coniferales) reproductive morphology

Leaf dimorphism in Cupressus nootkatensis D. Don and Cupressus vietnamensis (Farjon & T.H. Nguyên) Silba (Cupressaceae) and its ecological and evolutionary significance

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