Taxa de panmixia na goiabeira (Psidium guajava L.)

Sobrinho, J. Soubihe; Gurgel, J. T. A.

doi:10.1590/s0006-87051962000100002

Cited by 12 publications

(6 citation statements)

References 6 publications

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“…Essa espécie é considerada subespontânea no Brasil (Sobral et al 2012), sendo que as espécies encontradas no país são cultivares e não a espécie silvestre (Pereira 1984). Essa espécie é natural da América Tropical, ocorrendo do sul do México ao norte da América do Sul (Soubihe Sobrinho & Gurgel 1962). A goiabeira é muita atrativa para a fauna, devido à grande quantidade de frutos, podendo ser facilmente dispersa por possuir numerosas sementes.…”

Section: Resultsunclassified

Fitossociologia e estrutura do estrato arbóreo de um reflorestamento com espécies nativas em Mogi-Guaçu, SP, Brasil

Colmanetti

Barbos

2013

Hoehnea

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-(Phytosociology and structure of woody overstory from a reforestation with native species at Mogi-Guaçu, São Paulo State, Brazil). We have developed a phytosociological survey on tree stratum (woody overstory) from a nine-year-old reforestation at a Private Reserve of Natural Heritage, São Paulo State, Brazil. We evaluated all the specimens from the tree stratum (Circumference at Breast Height (CBH) ≥ 15 cm). They were obtained from 20 subplots (12.5 × 18 m), located at 20 permanent plots. We evaluated 364 specimens from the tree stratum and found 76 species, 63 genera, and 24 families at a 0.45 ha area. The canopy height ranged from 5 to 11 m. The estimated basal area was 18.29 m² ha -1, and the pioneer species contributed with 69.2 percent of the total plant species. Both basal area and average height parameters increased throughout time, whereas the diversity did not. The diversity index was considered high for a reforestation. Key words: ecological restoration, high diversity, reforestation RESUMO -(Fitossociologia e estrutura do estrato arbóreo de um reflorestamento com espécies nativas em Mogi-Guaçu, SP, Brasil). Foi realizado um estudo fitossociológico do estrato arbóreo, de um reflorestamento com nove anos após o plantio, na Reserva Particular do Patrimônio Natural Parque Florestal São Marcelo, em Mogi-Guaçu, SP, Brasil. Analisaram-se todos os indivíduos do estrato arbóreo com perímetro a 1,3 m de altura do solo ≥ 15 cm, obtidos em amostragens realizadas em 20 subparcelas (12,5 × 18 m), instaladas em 20 parcelas permanentes. Obtiveram-se, no levantamento, 364 indivíduos pertencentes a 76 espécies, de 63 gêneros e 24 famílias, para uma área total de 0,45 ha. O dossel variou, predominantemente, entre cinco e 11 m de altura. A área basal foi estimada em 18,29 m² ha -1 , sendo que as espécies pioneiras contribuíram com 69,2%. Parâmetros como a área basal e altura média aumentaram, enquanto a diversidade não variou ao longo do tempo. A diversidade encontrada foi considerada alta para um reflorestamento. Palavras-chave: alta diversidade, reflorestamento, restauração ecológica Um ponto relevante para a restauração ecológica, conforme previsto pela Resolução SMA n o 8/2008, corresponde ao uso de alta riqueza de espécies nativas (80 ou mais espécies arbóreas) nos reflorestamentos. Essa iniciativa é bastante plausível, considerando que a maioria dos ecossistemas brasileiros é formada por um

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Section: Resultsunclassified

Fitossociologia e estrutura do estrato arbóreo de um reflorestamento com espécies nativas em Mogi-Guaçu, SP, Brasil

Colmanetti

Barbos

2013

Hoehnea

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“…Species of the superfamily Apoidea are important pollinators of both P. guajava and P. guineense ( Lughadha and Proença, 1996 ; Boti, 2001 ; Alves and Freitas, 2007 ; de Siqueira, 2012 ; Ramos et al, 2019 ). Both species are also pollinated by the European honeybee, Apis mellifera ( Soubihe Sobrinho and Gurgel, 1962 ; Boti, 2001 ; Gressler et al, 2006 ; Pommer and Murakami, 2009 ). Psidium guyanense , P. nutans , P. rostratum , and P. rutidocarpum lack comprehensive studies of their breeding systems, pollination, and dispersal.…”

Section: Natural History Of Psidium Guajavamentioning

confidence: 99%

The Taming of Psidium guajava: Natural and Cultural History of a Neotropical Fruit

et al. 2021

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Guava (Psidium guajava L., Myrtaceae) is a Neotropical fruit that is widely consumed around the world. However, its evolutionary history and domestication process are unknown. Here we examine available ecological, taxonomic, genetic, archeological, and historical evidence about guava. Guava needs full sunlight, warm temperatures, and well-distributed rainfall throughout the year to grow, but tolerates drought. Zoochory and anthropochory are the main forms of dispersal. Guava’s phylogenetic relationships with other species of the genus Psidium are unclear. A group of six species that share several morphological characteristics are tentatively accepted as the Psidium guajava complex. DNA analyses are limited to the characterization of crop genetic diversity within localities and do not account for possible evolutionary and domestication scenarios. A significant amount of archeological information exists, with a greater number and older records in South America than in Mesoamerica, where there are also numerous historical records. From this information, we propose that: (1) the guava ancestor may have originated during the Middle or Late Miocene, and the savannas and semi-deciduous forests of South America formed during the Late Pleistocene would have been the most appropriate ecosystems for its growth, (2) the megafauna were important dispersers for guava, (3) dispersal by humans during the Holocene expanded guava’s geographic range, including to the southwestern Amazonian lowlands, (4) where its domestication may have started, and (5) with the European conquest of the Neotropics, accompanied by their domestic animals, new contact routes between previously remote guava populations were established. These proposals could direct future research on the evolutionary and domestication process of guava.

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“…Allard (1960) reported that the effective execution of an improvement program depends on the knowledge of the reproductive mode of the species because the choice of the breeding method is based on this characteristic, i.e., whether the species is autogamous or allogamous. In guava, this information is still controversial because different studies have reported that guava is allogamous and has a high rate of autogamy or vice versa (Dasarathy, 1951;Soubihe Sobrinho & Gurgel, 1962;Alves & Freitas, 2007). This information is still scarce for P. guineense.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the reproduction mode in Psidium spp. using the pollen:ovule ratio

et al. 2020

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This research aimed to explore the reproductive characteristics of three species of Psidium (P. guajava L., P. cattleyanum Sabine, and P. guineense Sw.) and estimate a probable reproduction strategy based on the pollen:ovule (P:O) methodology. The number of pollen grains per floral bud (NGPB), number of pollen grains per anther (NGPA), number of anthers per flower bud (NAB), number of ovules per flower bud (NOB), and the P:O ratio of each species were estimated. All species had a P:O ratio over 2,000 and were classified as xenogamous. P.guajava presented the highest values for all characteristics evaluated, with the NGPB at 3,777,519, the NOB at 584.50 and a P:O ratio of 6,462.82. Similarly, P. cattleyanum had a P:O ratio of 5,649.89 (NGPB 762,736 and NOB 135). However, P. guineense was considered facultative xenogamous, with P:O of 2,085.75, the NGPB at 741,484 and the NOB at 355.50. Thus, it was concluded that the studied species have a preference for allogamy and require many pollen grains to fertilize each ovule, demonstrating that the transfer of pollen to the stigma is not very specialized.

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Taxa de panmixia na goiabeira (Psidium guajava L.)

Cited by 12 publications

References 6 publications

Fitossociologia e estrutura do estrato arbóreo de um reflorestamento com espécies nativas em Mogi-Guaçu, SP, Brasil

Fitossociologia e estrutura do estrato arbóreo de um reflorestamento com espécies nativas em Mogi-Guaçu, SP, Brasil

The Taming of Psidium guajava: Natural and Cultural History of a Neotropical Fruit

Analysis of the reproduction mode in Psidium spp. using the pollen:ovule ratio

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