Biologia floral de Virola surinamensis (Rol.) Warb. (Myristicaceae)

Jardim, Mário Augusto Gonçalves; Mota, Cléo Gomes da

doi:10.1590/s0100-67622007000600020

Cited by 19 publications

(10 citation statements)

References 13 publications

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“…has excellent populations in the Mocambo and Combu Is. and this reinforces the importance of conservation of these areas, even if the species is no longer threatened by exploitation pressure it suffered severe depression and reduced populations in the past (Maués, 2009;Jardim and Mota, 2007).…”

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confidence: 65%

The status of conservation of urban forests in eastern Amazonia

et al. 2012

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This study aims to identify the remnant tree flora in six forest fragments in the metropolitan area of Belém and to analyze these fragments in terms of biological conservation, species richness and diversity in the local urban landscape. The fragments and their respective sampling areas were as follows: Amafrutas reserve (15 ha), Trambioca Is. reserve (2 ha), Bosque Rodrigues Alves city park (15 ha), Combu Is. reserve (10 ha), Gunma Park reserve (10 ha) and Mocambo reserve (5 ha). Inventories were built from lineal plots of 250 m 2 and included trees with DBH equal to or greater than 10 cm at a height of 1.3 m above ground. Sixty-nine families and 759 species, of which eight were officially listed as

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confidence: 65%

The status of conservation of urban forests in eastern Amazonia

et al. 2012

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“…V. surinamensis is a relatively common canopy tree species on BCI and is native to tropical and subtropical wet lowland forests across Central America and Amazonia (38). V. surinamensis is dioecious (40), fly pollinated (41), and produces large seeds (∼2 cm) that are borne singly and surrounded by a nutritious aril that attracts several species of birds and monkeys as primary seed dispersers (42). On BCI, V. surinamensis flowering peaks in the dry season (∼January) and seed production peaks in the following wet season (∼July) (43).…”

Section: Fraction Of Pathogens That Are Genotype-specificmentioning

confidence: 99%

Evidence of within-species specialization by soil microbes and the implications for plant community diversity

Eck

Stump

Delavaux

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

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Microbes are thought to maintain diversity in plant communities by specializing on particular species, but it is not known whether microbes that specialize within species (i.e., on genotypes) affect diversity or dynamics in plant communities. Here we show that soil microbes can specialize at the within-population level in a wild plant species, and that such specialization could promote species diversity and seed dispersal in plant communities. In a shadehouse experiment in Panama, we found that seedlings of the native tree species, Virola surinamensis (Myristicaceae), had reduced performance in the soil microbial community of their maternal tree compared with in the soil microbial community of a nonmaternal tree from the same population. Performance differences were unrelated to soil nutrients or to colonization by mycorrhizal fungi, suggesting that highly specialized pathogens were the mechanism reducing seedling performance in maternal soils. We then constructed a simulation model to explore the ecological and evolutionary consequences of genotype-specific pathogens in multispecies plant communities. Model results indicated that genotype-specific pathogens promote plant species coexistence-albeit less strongly than species-specific pathogens-and are most effective at maintaining species richness when genetic diversity is relatively low. Simulations also revealed that genotype-specific pathogens select for increased seed dispersal relative to species-specific pathogens, potentially helping to create seed dispersal landscapes that allow pathogens to more effectively promote diversity. Combined, our results reveal that soil microbes can specialize within wild plant populations, affecting seedling performance near conspecific adults and influencing plant community dynamics on ecological and evolutionary time scales. plant-soil feedback | Janzen-Connell hypothesis | species coexistence | community simulation | seed dispersal

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“…Além disso, o maior display de flores estaminadas, comparado com o das pistiladas, assegura a atração e manutenção dos polinizadores, garantindo assim o sucesso reprodutivo da espécie (Jardim & Mota, 2007 …”

Section: Discussionunclassified

“…A maior longevidade das flores pistiladas, em comparação com a das estaminadas está comumente associada à dioicia, sendo uma forma de aumentar o tempo de exposição aos agentes polinizadores, consequentemente, aumentando as chances de polinização (Lenza & Oliveira, 2006;Ostrorog & Barbosa, 2009), característica também observada em outras espécies dioicas, como Jacaratia spinosa -Caricaceae (Piratelli et al, 1998), Virola surinamensis -Myristicaceae (Jardim & Mota, 2007), Tapirira guianensis -Anacardiaceae (Lenza & Oliveira, 2005).…”

Section: Características Analisadosunclassified

Biologia reprodutiva de Cordiera macrophylla (K. Schum.) Kuntze (Rubiaceae), espécie dioica da região sudoeste do Estado de Mato Grosso, Brasil

et al. 2015

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Biologia reprodutiva de Cordiera macrophylla (K. Schum.) Kuntze (Rubiaceae), espécie dioica da região sudoeste do Estado de Mato Grosso, Brasil 1O gênero Cordiera (Rubiaceae) possui aproximadamente 25 espécies e ampla distribuição no Brasil. Seus representantes são árvores ou arbustos dioicos, com flores funcionalmente unissexuadas. Este estudo foi realizado em dois fragmentos de Floresta Estacional Semidecidual, no município de Tangará da Serra, MT. Foram investigadas a fenologia reprodutiva, a razão sexual, a morfologia e a biologia floral, o sistema e o sucesso reprodutivo. Cordiera macrophylla floresceu de julho a setembro, durante a estação seca, com pico sincrônico entre flores pistiladas e estaminadas. Flores estaminadas florescem antecipadamente e por um período mais prolongado que as pistiladas. A antese das flores pistiladas apresentou maior longevidade. A razão sexual foi de 1:1. Flores estaminadas são dispostas em inflorescências umbeliformes e as pistiladas são unifloras, ambas semelhantes morfologicamente. Os frutos são bagas verrucosas, polispérmicas. A taxa de formação de frutos por polinização natural foi de 95%, evidenciando a dependência dos polinizadores para a manutenção da espécie. O sucesso reprodutivo também foi alto, confirmando que a associação entre morfologia e biologia floral favoreceu a espécie nas áreas estudadas. Palavras-chave:Biologia e morfologia floral, dioicia, display floral, fenologia de floração, sistema reprodutivo. Reproductive biology of Cordiera macrophylla (K. Schum.) Kuntze (Rubiaceae), a dioic species of the southwestern Mato Grosso, Brazil Simone Santos de OliveiraThe gender Cordiera (Rubiaceae) has about 25 species and a wide distribution in Brazil. Its representatives are dioecious trees or shrubs, with functionally unisexual flowers. The study was carried out in two fragments of seasonal semideciduous forest, in the municipality of Tangará da Serra -MT. The reproductive phenology, sex ratio, morphology, and floral biology, as well as the reproductive system and success were investigated. Cordiera macrophylla bloomed in the dry season, from July to September, with synchronous peaks between pistillate and staminate flowers. Staminate bloom earlier and for a longer period than the pistillate flowers. The longevity of anthesis of female flowers was greater. The sex ratio was 1: 1. Staminate flowers are arranged in bell-shaped inflorescences and single-flowered pistillates, and are morphologically similar. The fruits are warty, polyspermic berries. The fruit formation rate by natural pollination was 95%, demonstrating the dependence on pollinators to maintain the species. The reproductive success was also high, confirming that the association between morphology and floral biology favored the species in the studied areas.

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Biologia floral de Virola surinamensis (Rol.) Warb. (Myristicaceae)

Cited by 19 publications

References 13 publications

The status of conservation of urban forests in eastern Amazonia

The status of conservation of urban forests in eastern Amazonia

Evidence of within-species specialization by soil microbes and the implications for plant community diversity

Biologia reprodutiva de Cordiera macrophylla (K. Schum.) Kuntze (Rubiaceae), espécie dioica da região sudoeste do Estado de Mato Grosso, Brasil

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