The Encyclopedia of Rhododendron Species

Schmid, Rudolf; Cox, Peter Alfred; Cox, Kenneth N. E.

doi:10.2307/1224053

Cited by 7 publications

(2 citation statements)

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“…28 N), but also the only species examined outside of the Sino-Himalaya, which makes it difficult to determine the cause of the observed pattern. Additionally, differences among subgenera may be linked to clade-specific morphological characters such as leaf habit (Cox & Cox 1997;Goetsch et al 2005). The deciduous subgenus Pentanthera, for example, might experience less stress through winter conditions or drought compared to the rest of our species.…”

Section: Resultsmentioning

confidence: 99%

Ageing varies greatly within a single genus: evidence from Rhododendrons in botanic gardens

Baden,

Colchero,

Cubey

et al. 2024

Preprint

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There is mounting evidence that age matters in plant demography, but also indications of that relationships between age and demographic rates may vary significantly among species. Age-based plant demographic data, however, is difficult to collect, and still lacking for most species. We used individual birth and death records for twelve Rhododendron species from botanical gardens and Bayesian survival trajectory analysis to assess how mortality changes with age and whether differences between species are related to ancestral environmental conditions. We found substantial among-species variation in age-trajectories of mortality, no clear relationships between demographic measures and ancestral habitat, but statistically significant differences among taxonomic groups. We conclude that demographic consequences of ageing can differ remarkably, even among species in the same genus, but that causes of this variation are still unclear. Furthermore, we suggest there is untapped potential in using botanic garden records in future studies on plant life history.

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Section: Resultsmentioning

confidence: 99%

Ageing varies greatly within a single genus: evidence from Rhododendrons in botanic gardens

Baden,

Colchero,

Cubey

et al. 2024

Preprint

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“…The distribution of the genus Rhododendron is strongly linked with geography (Irving and Hebda, 1993), which makes it difficult to speculate about the cause of the observed pattern. One possibility, however, is that differences among subgenera are associated with clade‐specific characters such as leaf habit (Cox and Cox, 1997; Goetsch et al, 2005), with leaves in subgenus Pentanthera being deciduous, in Hymenanthes evergreen, and in Rhododendron sometimes semi‐evergreen. Also, for example, leaf morphology and age at first reproduction are known to differ significantly between the major groups (Medeiros et al, 2017; R. Milne, personal communication).…”

Section: Discussionmentioning

confidence: 99%

Aging varies greatly within a single genus: A demographic study of Rhododendron spp. in botanic gardens

Baden,

Colchero,

Cubey

et al. 2023

American J of Botany

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PREMISE OF THE STUDYThere is mounting evidence that age matters in plant demography, but also indications that relationships between age and demographic rates may vary significantly among species. Age‐based plant demographic data, however, is time‐consuming to collect, and still lacking for most species, and little is known about general patterns across species or what may drive differences.METHODSWe used individual birth and death records for twelve Rhododendron species from botanical gardens and conducted Bayesian survival trajectory analyses to assess how mortality changed with age. We calculated the demographic measures of aging rate, lifespan equality, and life expectancy for each species, and assessed their relationships with the climatic conditions at species’ sites of ancestral origin and with taxonomic group (subgenus).KEY RESULTSWe found substantial among‐species variation in survival trajectories, with mortality increasing, decreasing, or remaining constant with advancing age. Moreover, we found no relationships between demographic measures and ancestral climatic conditions but there were statistically significant differences among taxonomic groups in the rate of change in mortality with age (aging rate).CONCLUSIONSWe conclude that demographic consequences of aging can differ qualitatively, even among species in the same genus. In addition, taxonomic trends in aging rates indicate they may be genetically determined even though evolutionary drivers are still unclear. Furthermore, we suggest there is untapped potential in using botanic garden records in future studies on plant life history.This article is protected by copyright. All rights reserved.

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Are rhododendron hybrids distinguishable on the basis of morphology and microsatellite polymorphism?

Caser

Akkak

Scariot

2010

Scientia Horticulturae

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The Encyclopedia of Rhododendron Species

Cited by 7 publications

References 0 publications

Ageing varies greatly within a single genus: evidence from Rhododendrons in botanic gardens

Ageing varies greatly within a single genus: evidence from Rhododendrons in botanic gardens

Aging varies greatly within a single genus: A demographic study of Rhododendron spp. in botanic gardens

Are rhododendron hybrids distinguishable on the basis of morphology and microsatellite polymorphism?

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