Rapid radiation of Rheum (Polygonaceae) and parallel evolution of morphological traits

Sun, Yongshuai; Wang, Ailan; Wan, Dongshi; Wang, Qian; Liu, Jianquan

doi:10.1016/j.ympev.2012.01.002

Cited by 115 publications

(144 citation statements)

References 48 publications

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“…MP analysis yielded nine equally parsimonious trees, and a strict consensus tree of these trees is shown in Figure 1. The topology of the MP tree was similar with the molecular phylogenies published to date [4,24]. Because only the catalytic region of the rbcL gene was taken into account, the clustering relationship was basically consistent with the geographical distribution within Rheum in the MP tree, and all of the Rheum species comprised a well-supported lineage with a sister relationship to Oxyria.…”

Section: Resultssupporting

confidence: 62%

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Adaptive evolution of the rbcL gene in the genus Rheum (Polygonaceae)

Zhao

Yuan

et al. 2017

Biotechnology & Biotechnological Equipment

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Rapid putative radiations of Rheum might be caused by the recent uplifts of the Qinghai-Tibetan Plateau and the quaternary climate oscillations. To better understand the molecular adaptation associated with Rheum radiation, in this study, the adaptive evolution of the chloroplast rbcL gene was analysed using the Phylogenetic Analysis Program. The results showed that two amino acid residues (75F, 203I) were under positive selection. The spatial analysis indicated that the site (75F) was located in the b-sheet of the N-terminal loops involved in subunit interactions in the L8S8 molecule, and the site (203I) was in the a/b-barrel active centre located on the C-terminal domain of the large subunit of Rubisco. These results suggest that potential positive selection in rbcL might have played an important role in the adaption of Rheum species to the extreme environments in Qinghai-Tibetan Plateau regions, and different species lineages might have been subjected to different selective pressures.

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Section: Resultssupporting

confidence: 62%

“…The distribution and the ancestral area reconstruction analyses implied that rapid radiations of Rheum have taken place, possibly as a result of the extensive uplifts of the Qinghai-Tibetan Plateau [3,4]. As a reflection of their adaptation to the new alterations of the habitat, these plants show marked phenotypic diversification [5].…”

Section: Introductionmentioning

confidence: 99%

Adaptive evolution of the rbcL gene in the genus Rheum (Polygonaceae)

Zhao

Yuan

et al. 2017

Biotechnology & Biotechnological Equipment

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“…These two clades of plants evolved as a response of temperature changes and the apparition of dry habitat conditions. It is likely that climate changes facilitated bursts of diversification [19,27,66]. Again, although these studies show an association between vicariance and species diversification, likely mediated through climate change or emergence of new barriers, it is not clear which mechanisms were involved here.…”

Section: Pure and Applied Biogeographymentioning

confidence: 75%

“…[35]). After the historical inference is conducted, it is crucial to identify whether these same nodes where a dispersal or vicariance event was inferred exhibit a notable shift in diversification dynamics [2,3,66].…”

Section: Limitations Of Current Methods To Link Historical Events Witmentioning

confidence: 99%

“…For instance, rapid Andean uplift during the Miocene, with the concomitant climate changes, likely promoted allopatric speciation in Heliotropium plant lineages, which adapted to new arid conditions in southern South America [31]. Similarly, the Miocene uplift of the Qinghai-Tibetan plateau promoted allopatric speciation in Asteraceae clades plants [27] and Rheum plants [66]. These two clades of plants evolved as a response of temperature changes and the apparition of dry habitat conditions.…”

Section: Pure and Applied Biogeographymentioning

confidence: 99%

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Are Historical Biogeographical Events Able to Promote Biological Diversification?

Velasco¹

2018

Pure and Applied Biogeography

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One of the goals of evolutionary biology is understanding how biological diversification change across spatial and temporal scales. Theoretically, it has been established that external (i.e., dispersals) and internal (i.e., origin of a key innovations) factors can modulate shifts in rates of species diversification. However, the role of historical events as trigger of species diversification rates have not been well understood in empirical studies. I reviewed the literature linking historical biogeographic events and species diversification in many groups. Many of studies conclude that dispersals can be associated with exceptional changes in species diversification rates in insular and mainland areas. I discuss the limitations of some approaches used to discover the link between historical biogeography and macroevolution. I propose some predictions under biogeographic scenarios to gain understanding in how historical events promote biological diversification. I suggest that future studies linking biogeography and macroevolution should incorporate ecologically-relevant traits to discern the mechanisms underlying these historical associations. Although new developments in phylogenetic comparative methods have been done, still is necessary more traditional field-based ecological and evolutionary research. The link between biogeography and diversification still remains narrative and a comprehensive approach is necessary to establish how diversification was triggered by historical events.

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When it only takes one to tango: assessing the impact of apomixis in the fern genus Pteris

Picard

Ranft

Grusz

et al. 2021

American J of Botany

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Premise Apomixis (asexual reproduction by seed, spore, or egg) has evolved repeatedly across the tree of life. Studies of animals and angiosperms show that apomictic lineages are often evolutionarily short‐lived and frequently exhibit different distributions than their sexual relatives. However, apomixis is rare in these groups. Less is known about the role of apomixis in the evolution and biogeography of ferns, in which ~10% of species are apomictic. Apomixis is especially common in the fern genus Pteris (34–39% of species); however, because of the limited taxonomic and geographic sampling of previous studies, the true frequency of apomixis and its associations with geography and phylogeny in this lineage remain unclear. Methods We used spore analyses of herbarium specimens to determine reproductive mode for 127 previously unsampled Pteris species. Then we leveraged biogeographic and phylogenetic analyses to estimate the global distribution and evolution of apomixis in Pteris. Results Among all Pteris species examined, we found that 21% are exclusively apomictic, 71% are exclusively sexual, and 8% have conflicting reports. Apomixis is unevenly distributed across the range of the genus, with the Paleotropics exhibiting the highest frequency, and has evolved numerous times across the Pteris phylogeny, with predominantly East Asian and South Asian clades containing the most apomictic species. Conclusions Apomixis arises frequently in Pteris, but apomictic species do not appear to diversify. Species that encompass both apomictic and sexual populations have wider ranges than exclusively sexual or apomictic species, which suggests that sexual and apomictic ferns could occupy separate ecological niches.

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Rapid radiation of Rheum (Polygonaceae) and parallel evolution of morphological traits

Cited by 115 publications

References 48 publications

Adaptive evolution of the rbcL gene in the genus Rheum (Polygonaceae)

Adaptive evolution of the rbcL gene in the genus Rheum (Polygonaceae)

Are Historical Biogeographical Events Able to Promote Biological Diversification?

When it only takes one to tango: assessing the impact of apomixis in the fern genus Pteris

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