Seed Germination Ecology in Neotropical Melastomataceae: Past, Present, and Future

Ordóñez‐Parra, Carlos A.; Messeder, João Vitor S.; Mancipe-Murillo, Carolina; Calderón-Hernández, Manuela; Silveira, Fernando A. O.

doi:10.1007/978-3-030-99742-7_32

Cited by 1 publication

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References 155 publications

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“…For instance, this germination behaviour has only been reported for one species in our study system (Lippia filifolia, Pimenta et al 2007). Another possible explanation is the small variation in seed size in our data, with most species producing small (86% records, < 1 mg) seeds and from lineages known to have positively photoblastic seeds, such as Melastomataceae, Xyridaceae and Velloziaceae (Nunes et al 2016;Garcia et al 2020;Ordóñez-Parra et al 2022). Large-seeded species from campo rupestre, mainly from Fabaceae, have shown to be light-indifferent (Nunes et al 2016), so additional studies with other large-seeded species are needed to test the prevalence of the seed mass-light responses trade-off in rock outcrop vegetation.…”

Section: Campo Rupestre Species Depend On Light For Germinationmentioning

confidence: 79%

“…To test for differences in quantitative seed traits between ecological groups (growthform, microhabitat, and geographic distribution), we used phylogenetic generalised least square models as implemented in the package caper (Orme et al 2018). Likewise, variation in qualitative seed traits were assessed using a phylogenetic logistic regression (Ives and Garland 2010) implemented in the phylolm package (Ho and Ané 2014).…”

Section: Variation and Phylogenetic Signal Of Seed Functional Traitsmentioning

confidence: 99%

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Seed functional ecology in Brazilian rock outcrop vegetation: an integrative synthesis

Ordóñez‐Parra

Medeiros

Dayrell

et al. 2023

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Background and Aims: Rock outcrop vegetation is distributed worldwide and hosts a diverse, specialised, and unique flora that evolved under extremely harsh environmental conditions. The germination ecology in such ecosystems has received little attention, especially regarding the association between seed traits, germination responses and adult plants ecology. Here, we provide a quantitative and meta–analytical review of the seed functional ecology of Brazilian rocky outcrop vegetation, focusing on four vegetation types:campo rupestre,canga,campo de altitudeand inselbergs. Methods: Using a database with functional trait data for 383 taxa and 10,187 germination records for 281 taxa, we calculated the phylogenetic signal of seven seed traits and tested whether they varied among growth forms, geographical distributions, and microhabitats. We also conducted a meta–analysis to understand the effects of light, temperature, and fire–related cues on the germination ofcampo rupestrespecies and how the before mentioned ecological groups and seed mass affect such responses. Key Results: All traits showed a strong phylogenetic signal.Campo rupestrespecies responded positively to light and had optimal germination between 20–30 °C. The effect of temperatures below and above this range was modulated by growth form, with shrubs requiring and tolerating higher temperatures to germinate. We only found evidence of a moderating effect of seed mass for responses to heat shocks, with larger, dormant seeds tolerating heat better. Heat shocks above 200 °C killed seeds, but smoke accelerated germination. No consistent differences in germination responses were found between restricted and widespread species or microhabitats. Still, species from xeric habitats evolved phenological strategies to synchronise germination with higher soil water availability. Conclusions: Evolutionary history plays a major role in the seed ecology of Brazilian rock outcrop vegetation. However, seed traits and germination responses did not explain species geographic distribution and microhabitats, suggesting other traits are more likely to explain such differences.

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Section: Campo Rupestre Species Depend On Light For Germinationmentioning

confidence: 79%

Section: Variation and Phylogenetic Signal Of Seed Functional Traitsmentioning

confidence: 99%

Seed functional ecology in Brazilian rock outcrop vegetation: an integrative synthesis

Ordóñez‐Parra

Medeiros

Dayrell

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

Seed Germination Ecology in Neotropical Melastomataceae: Past, Present, and Future

Cited by 1 publication

References 155 publications

Seed functional ecology in Brazilian rock outcrop vegetation: an integrative synthesis

Seed functional ecology in Brazilian rock outcrop vegetation: an integrative synthesis

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