Phenology of Guarea macrophylla Vahl (Meliaceae) in subtropical riparian forest in southern Brazil

Müller, Andressa; Schmitt, Jairo Lizandro

doi:10.1590/1519-6984.14615

Cited by 8 publications

(3 citation statements)

References 24 publications

(32 reference statements)

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“…urundeuva fruits grow in months with low rainfall (below 30 mm per month), relative humidity below 60% and high wind speed (Kill et al, 2010). This can be explained by the synchrony of pollinating agents to environmental stimuli (Müller and Schmitt, 2018) and also by the Wind, favoring the spread of propagules, facilitating later germination and the establishment of seedlings during the rainy season (Lopes et al, 2010). As can be seen in Table 2, the correlation between average humidity and germination during fruiting was negative.…”

Section: Fases Fenológicasmentioning

confidence: 94%

Climate and the Myracrodruon urundeuva Allemão seed production

Oliveira

Angelotti

Marques

et al. 2020

Rev. Bras. Geog. Fis.

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The seed physiological quality is related with climate variation during development. Thus, the aim of this study was to determinate the relation among climatic factors and germination of M. urundeuva seeds in different growing seasons and to predict the germination according to the climatic scenarios. Seeds from 14 crop seasons (2005 to 2018) and climatic data from the ‘Bebedouro’ weather station (Embrapa Semiarid) were used to determine the influence of climatic conditions on the vegetative, female and male flowers and the fruiting of M. urundeuva. The simple linear correlation and the multiple linear regression model were applied to determine the influence of climatic elements on the production of M. urundeuva seeds. The multivariate calibration model was developed using the previous selection of variables by the algorithm of successive projections. From the mathematical model, the germination of M. urundeuva seeds was predicted according to climate change, as provided by the IPCC. Seed germination showed a significant difference between harvests. Through the correlation it was observed that the temperature correlated negatively with all phenological phases of M. urundeuva. The quality of M. urundeuva seeds is related to the maximum, average and minimum temperature, average and minimum humidity, and precipitation. These climate variables during the different phenological phases of M. urundeuva affect the physiological quality of the seeds, and, in climate change scenarios, there will be a reduction in the seed production of this species. O clima e a produção de sementes de Myracrodruon urundeuva Allemão RESUMO A qualidade fisiológica das sementes está relacionada às variações climáticas durante o seu desenvolvimento. Assim, o objetivo deste trabalho foi determinar a relação entre os elementos climáticos e a germinação de diferentes safras de sementes de M. urundeuva, bem como prever a germinação frente aos cenários climáticos. Foram utilizadas sementes de 14 safras (2005 a 2018) e os dados climáticos da estação meteorológica de Bebedouro, pertencente a Embrapa Semiárido, para determinar a influência das condições climáticas nas fases vegetativa, flores femininas e masculinas e da frutificação de M. urundeuva. A correlação linear simples e o modelo de regressão linear múltipla foram aplicados para determinar a influência dos elementos climáticos na produção de sementes de M. urundeuva. O modelo de calibração multivariado foi desenvolvido empregando a seleção prévia de variáveis pelo algoritmo das projeções sucessivas. A partir do modelo matemático realizou-se a previsão da germinação de sementes de M. urundeuva frente às mudanças climáticas, previstas pelo IPCC. A germinação das sementes apresentou diferença significativa entre as safras. Por meio da correlação observou-se que a temperatura correlacionou negativamente com todas as fases fenológicas da M. urundeuva. A qualidade das sementes de M. urundeuva está relacionada com a temperatura máxima, média e mínima, umidade média e mínima, e com a precipitação. Essas variáveis de clima durante as diferentes fases fenológicas de M. urundeuva afetam a qualidade fisiológica das sementes, sendo que, em cenários de mudanças climáticas, ocorrerá uma redução na produção de sementes desta espécie.Palavras-chave: aroeira-do-sertão, mudanças climáticas, germinação.

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Section: Fases Fenológicasmentioning

confidence: 94%

Climate and the Myracrodruon urundeuva Allemão seed production

Oliveira

Angelotti

Marques

et al. 2020

Rev. Bras. Geog. Fis.

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“…Vector r can be considered as a measure of the seasonality degree. The Rayleigh test was applied to indicate the significance ( p < 0.05) of the mean angle (Dahua‐Machoa, 2018; Müller & Schmitt, 2017). Each monthly measure was regarded as a sample.…”

Section: Methodsmentioning

confidence: 99%

Flowering, floral visitors and climatic drivers of reproductive phenology of two endangered magnolias from neotropical Andean forests

Serna-González

Urrego-Giraldo

Santa-Ceballos

et al. 2021

Plant Species Biology

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Depressed fruit and seed production and scant seedling recruitment appear to be imperiling natural populations of Colombian Magnolia species. From February 2015 to April 2017, we recorded data on flowering, pollen limitation, floral visitors, and the reproductive phenology of Magnolia jardinensis and Magnolia yarumalensis, two threatened and endemic species from Colombian Andean cloud forests. Both species are protogynous with anthesis lasting two consecutive days-with M. jardinensis flowers opening in the evening, while M. yarumalensis flowers open early in the morning. Fruit abortion in both bagged flowers and open pollination experiments suggests that both species exhibit considerable reproductive limitations. There was a lower percentage of pollen germination in M. jardinensis (3-26%) than in M. yarumalensis (60-86%), suggesting more limitations in the former species. Magnolia yarumalensis was a prolific fruit producer compared to M. jardinensis, which produced only one ripe fruit during the study, in spite of its high production of floral buds. Despite sharing the same locality, these species did not share pollinators, thus further increasing their vulnerability to extinction. Floral buds in both species were negatively correlated with minimum temperature and precipitation, while ripe fruits in both species were positively correlated with increases in precipitation and temperature. Our results provide information about how climate change could affect the various phenophases of these species. Knowledge about reproductive phenology and life history traits such as flowering and pollinators is crucial for specific and efficient conservation efforts to protect these endangered species under the current climate change scenarios.

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“…Climate cues contribute significantly toward phenological variance. For example, the accumulation of days above or below certain temperature thresholds has a strong effect on the timing of germination, leaf‐out, flowering, and fruiting (Pemadasa and Lovell, 1974; Müller and Schmitt, 2018; Meng et al, 2021). While advanced phenology due to warming is the most commonly documented response (Menzel et al, 2006; Miller‐Rushing and Primack, 2008; Suonan et al, 2017; Piao et al, 2019), other studies found contradictory outcomes, including delayed phenology due to an unmet chilling requirement (Yu et al, 2010; Hart et al, 2014) and advanced phenology following regional cooling (Banaszak et al, 2020).…”

Section: Figurementioning

confidence: 99%

Beyond the usual climate? Factors determining flowering and fruiting phenology across a genus over 117 years

Bartlett

Austin

Beck

et al. 2023

American J of Botany

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Premise: Although changes in plant phenology are largely attributed to changes in climate, the roles of other factors such as genetic constraints, competition, and self-compatibility are underexplored. Methods: We compiled >900 herbarium records spanning 117 years for all eight nominal species of the winter-annual genus Leavenworthia (Brassicaceae). We used linear regression to determine the rate of phenological change across years and phenological sensitivity to climate. Using a variance partitioning analysis, we assessed the relative influence of climatic and nonclimatic factors (self-compatibility, range overlap, latitude, and year) on Leavenworthia reproductive phenology. Results: Flowering advanced by ~2.0 days and fruiting by ~1.3 days per decade. For every 1°C increase in spring temperature, flowering advanced ~2.3 days and fruiting ~3.3 days. For every 100 mm decrease in spring precipitation, each advanced ~6-7 days. The best models explained 35.4% of flowering variance and 33.9% of fruiting. Spring precipitation accounted for 51.3% of explained variance in flowering date and 44.6% in fruiting. Mean spring temperature accounted for 10.6% and 19.3%, respectively. Year accounted for 16.6% of flowering variance and 5.4% of fruiting, and latitude for 2.3% and 15.1%, respectively. Nonclimatic variables combined accounted for <11% of the variance across phenophases. Conclusions: Spring precipitation and other climate-related factors were dominant predictors of phenological variance. Our results emphasize the strong effect of precipitation on phenology, especially in the moisture-limited habitats preferred by Leavenworthia. Among the many factors that determine phenology, climate is the dominant influence, indicating that the effects of climate change on phenology are expected to increase.

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Phenology of Guarea macrophylla Vahl (Meliaceae) in subtropical riparian forest in southern Brazil

Cited by 8 publications

References 24 publications

Climate and the Myracrodruon urundeuva Allemão seed production

Climate and the Myracrodruon urundeuva Allemão seed production

Flowering, floral visitors and climatic drivers of reproductive phenology of two endangered magnolias from neotropical Andean forests

Beyond the usual climate? Factors determining flowering and fruiting phenology across a genus over 117 years

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