Biologia reprodutiva de Psychotria spectabilis Steyrm. e Palicourea cf. virens (Poepp &amp; Endl.) Standl. (Rubiaceae) em uma floresta tropical úmida na região de Manaus, AM, Brasil

Santos, Otilene dos Anjos; Webber, Antonio Carlos; Costa, Flávia R. C.

doi:10.1590/s0102-33062008000100025

Cited by 7 publications

(11 citation statements)

References 49 publications

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“…(Puff 1991), because the stigma is receptive from the pre-anthesis stage and it remains receptive throughout the whole life of the flower. Several studies on floral biology (Coelho & Barbosa 2004;Santos et al 2008) realized on heterostylous species of Rubiaceae indicate that the stigmatic receptivity starts after anthesis so O. salzmannii is different as it has been verified that the stigma is already receptive in floral buds before anthesis. Riveros et al (1995) cite two species of Hymenoptera, one species of Apidae, Apis mellifera the most common visitor, one species of Halicitade and two species of Diptera (Syrphidae) as pollinators of Oldenlandia salzmannii.…”

Section: Phenologymentioning

confidence: 99%

Morpho-anatomical and morphometric studies of the floral structures of the distylous Oldenlandia salzmannii (Rubiaceae)

2016

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Th e genus Oldenlandia (Rubiaceae) has a confl icting generic delimitation, with representatives that show diff erent fl oral syndromes. Oldenlandia salzmannii is a marshy herb that is widespread in South America. It is heterostylous, specifi cally distylous, and self-compatible. Recent molecular phylogenetic studies found that this species forms a clade that is isolated from the remaining described taxa of Oldenlandia. Information about the fl oral anatomy and reproductive biology of genera in the Spermacoceae tribe, particularly Oldenlandia, is insuffi cient, especially among the neotropical species. Accordingly, the present study aimed at contributing information on the reproductive biology of Oldenlandia salzmannii by analyzing its fl oral morpho-anatomy, morphometrics and phenology of both fl oral morphs. Th ese analyses were conducted with natural, cultivated and fi xed material using optical and scanning electron microscopes. Morphologically, the species is typically heterostylous with two fl oral morphs, long-styled and short-styled, the main diff erence being the indument of the corolla. Th e short-styled fl owers have larger anthers and pollen grains. Morphometrics show a high degree of herkogamic reciprocity. Th e mature ovules have a hemitropous position, which is the fi rst record of this position for the Spermacoceae tribe. Th is study represents the fi rst comprehensive morphological study of Oldenlandia salzmannii.

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Section: Phenologymentioning

confidence: 99%

Morpho-anatomical and morphometric studies of the floral structures of the distylous Oldenlandia salzmannii (Rubiaceae)

2016

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“…Pollen harvesting by Neotropical stingless bees is common in flowers of Rubiaceae (see Roubik, 1989;Wilms et al, 1996;Ramalho et al, 2007), but in most cases they were considered pollen thieves (Stone, 1996;Consolaro et al, 2005;Santos et al, 2008) or their role as pollinators was not well established (Ornelas et al, 2004;Jonjitvimol & Wattanachaiyingcharien, 2006;Ramalho et al, 2007;Sakai & Wright, 2008). Thus, pollination of Rubiaceae species by meliponids seems to be rare.…”

Section: Discussionmentioning

confidence: 99%

“…Members of the family are quite diverse in both floral biology (morphology and size of flowers and anthesis dynamics) and reproductive systems (e.g., presence of dioecy, monoecy, and heterostyly) (Barrett & Richards, ). Its members also have a wide spectrum of pollination agents, mainly diurnal and nocturnal insects of different orders (e.g., Riveros et al, ; Ortiz et al, ; Lasso & Naranjo, ; Teixeira & Machado, ; Consolaro et al, ; Santos et al, ; Ávila & Freitas, ; Xie et al, ), and also hummingbirds (e.g., Sobrevilla et al, ; Ornelas et al, ) and bats (Sazima et al, ). As the angiosperm family with the most heterostylic taxa (Barrett & Richards, ), reproductive studies have focused on species with this trait, and little is known about pollinators and self‐incompatibility systems in homomorphic taxa (Souza et al, ).…”

mentioning

confidence: 99%

Is the pollination biology of Bathysa and Schizocalyx consistent with their segregation? A first approach for two sympatric species in southeastern Brazil

Freitas

Andrich

2013

J of Sytematics Evolution

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Tribe Condamineeae appears to be well supported in recent phylogenetic studies. However, the species of Bathysa were divided into two clades, leading to restoration of Schizocalyx. We studied the reproductive biology of one species from each clade, which occur sympatrically in the montane Brazilian Atlantic forest. Flowering overlap was short (from December to March in B. australis and from February to June in S. cuspidatus). The flowers of both species are protogynous and homostylous and last for about 3 days. The unit of pollination in B. australis is the inflorescence. Its flowers have a greenish hypocrateriform corolla (tube about 5 mm long) and were mainly pollinated by bees and wasps in search of nectar. Schizocalyx cuspidatus has white flowers with an infundibuliform corolla (tube about 8 mm long), and its main pollinators were stingless bees in search of pollen. The pollination systems of the two species did not correspond to their pollination syndromes. Morphological differences between Bathysa and Schizocalyx were reflected in their pollination systems, with greater phenotypic specialization in S. cuspidatus, the flowers of which offer pollen as the main resource, an unusual feature within Rubiaceae. Schizocalyx cuspidatus showed higher reproductive capacity by having more inflorescences per plant, more ovules per flower, and twice the proportion of flowering individuals. However, the reproductive efficiency (fruit set, seed/ovule ratio) did not differ between the species, despite the higher frequency of visits by pollinators to S. cuspidatus. Self‐compatibility in B. australis and self‐incompatibility in S. cuspidatus seem to explain these results.

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“…The fl owers have tubular corolla and are odorless, brightly colored and hummingbird-pollinated (e.g. Feinsinger & Busby 1987, Feinsinger et al 1988, Ree 1997, Contreras & Ornelas 1999, Coelho & Barbosa 2003, Lau & Bosque 2003, Ornelas et al 2004a, b, Mendonça & Anjos 2006, Santos et al 2008. Palicourea longepedunculata Gardner is a distylous shrub found in the forest understory in southern Brazil (Taylor 1997, Pereira et al 2006.…”

Section: Introductionmentioning

confidence: 99%

Floral attributes, ornithophily and reproductive success of Palicourea longepedunculata (Rubiaceae), a distylous shrub in southeastern Brazil

Silva

Vieira²,

Amaral³

2010

Rev. bras. Bot.

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-(Floral attributes, ornithophily and reproductive success of Palicourea longepedunculata (Rubiaceae), a distylous shrub in southeastern Brazil). Floral attributes, ornithophily and reproductive success of Palicourea longepedunculata Gardner were studied in a fragment of the Atlantic Forest in southeastern Brazil. This species is a distylous shrub that occurs in wet forest understory. In an area of seven hectares, the frequency of the morphs was found at a ratio very close to the expected 1:1. The fl owering period extended from March (end of the rainy season) to September, with a fl owering peak in May/June (dry season). The fl oral attributes of the morphs were similar, i.e., the fl owering of the fl oral morphs was synchronous, and the numbers of infl orescences per plant, fl owers per infl orescence, open fl owers per infl orescence and per plant of the fl oral morphs were similar. The pollen grains of the morphs presented similar sizes, as well as their viability. Palicourea longepedunculata is self-incompatible and mainly pollinated by Phaethornis rubber (Aves, Trochilidae), which accounted for 62.07% of the foraging bouts. The reproductive success was similar between morphs: the numbers of fruits per infl orescence were, in average, 85.7 (L-morph) and 107.1 (S-morph) and there was no signifi cant difference in the production of seeds (one or two) per fruit between the morphs. Fruits were similar in height, width and weight.Key words -Atlantic forest, fl owering phenology, hummingbirds, Palicourea, Phaethornis RESUMO -(Atributos fl orais, ornitofi lia e sucesso reprodutivo de Palicourea longepedunculata (Rubiaceae), um arbusto distílico no sudeste do Brasil). Os atributos fl orais, a ornitofi lia e o sucesso reprodutivo de Palicourea longepedunculata Gardner foram estudados em fragmento de Floresta Atlântica do sudeste do Brasil. Essa espécie é um arbusto distílico que ocorre em sub-bosque úmido de fl orestas. Em uma área de sete hectares, os indivíduos dos morfos brevistilo e longistilo foram encontrados em uma taxa muito próxima da esperada, 1:1. O período de fl oração estendeu-se de março (fi nal da estação chuvosa) a setembro, com um pico em maio/junho (estação seca). Os atributos fl orais dos morfos foram similares, isto é, a fl oração dos morfos fl orais foi sincronizada e os números de infl orescências por planta, de fl ores por infl orescência, de fl ores abertas por infl orescência e por planta dos morfos foram semelhantes. Os grãos de pólen dos morfos apresentaram tamanho e viabilidade similares. Palicourea longepedunculata é autoincompatível e polinizada principalmente por Phaethornis ruber (Aves, Trochilidae), que realizou 62,07% das ondas de forrageamento. Os morfos apresentaram sucessos reprodutivos similares: os números de frutos por infl orescência foram, em média, 85,7 (longistilo) e 107,1 (brevistilo) e não houve diferença signifi cativa na produção de sementes (uma ou duas) por fruto entre os morfos. Os frutos foram similares em altura, largura e peso.Palavras-chave -beija-fl or...

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Biologia reprodutiva de Psychotria spectabilis Steyrm. e Palicourea cf. virens (Poepp & Endl.) Standl. (Rubiaceae) em uma floresta tropical úmida na região de Manaus, AM, Brasil

Cited by 7 publications

References 49 publications

Morpho-anatomical and morphometric studies of the floral structures of the distylous Oldenlandia salzmannii (Rubiaceae)

Morpho-anatomical and morphometric studies of the floral structures of the distylous Oldenlandia salzmannii (Rubiaceae)

Is the pollination biology of Bathysa and Schizocalyx consistent with their segregation? A first approach for two sympatric species in southeastern Brazil

Floral attributes, ornithophily and reproductive success of Palicourea longepedunculata (Rubiaceae), a distylous shrub in southeastern Brazil

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