Flowering, Sex Ratios, Pollen-Ovule Ratios, Fruit Set, and Reproductive Effort of a Dioecious Tree, Myristica insipida (Myristicaceae), in Two Different Rain Forest Communities

Armstrong, Joseph E.; Irvine, Anthony K.

doi:10.2307/2444776

Cited by 81 publications

(122 citation statements)

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“…Females of woody species have been reported to show reduced growth and/or survivorship (e.g., Armstrong and Irvine 1989, Obeso et al 1998, Rocheleau and Houle 2001, Espí rito-Santo et al 2003. However, the existence of these detrimental effects often appear to depend on the amount of reproductive investment of energy and/or nutrients relative to that available (e.g., Popp andReinartz 1988, Vasiliauskas andAarssen 1992), to exist at the branch level or ramet level (e.g., Luken 1987, Obeso 1997), or to affect reproductive frequency rather than annual 1 We are indebted to the late John Small and his coworkers for their labeling of recruits and the initial data on heights and sex expression.…”

mentioning

confidence: 99%

Growth Rates, Survivorship, and Sex Ratios of Juniperus virginiana on the New Jersey Piedmont from 1963 to 2000

Quinn¹,

Meiners²

2004

Journal of the Torrey Botanical Society

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mentioning

confidence: 99%

Growth Rates, Survivorship, and Sex Ratios of Juniperus virginiana on the New Jersey Piedmont from 1963 to 2000

Quinn¹,

Meiners²

2004

Journal of the Torrey Botanical Society

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“…Madriz andRamírez (1996-1997) also recorded a higher production of flowers in the male inflorescences in C. uvifera. Higher production of staminate flowers has also been found in dioecious species (e.g., Armstrong and Irvine, 1989;Piratelli et al, 1998). Although larger floral displays have been shown to increase the removal of pollen (Willson and Price, 1977), the low natural fructification in C. cereifera (Table 1) indicated the limited pollination.…”

Section: Resultsmentioning

confidence: 91%

Trioecy in Coccoloba cereifera Schwacke (Polygonaceae), a narrow endemic and threatened tropical species

Silva

Oliva

Vieira

et al. 2008

Braz. arch. biol. technol.

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“…Esta analogia pode ser feita para inflorescências de T. guianensis que foram consideradas como as unidades de atração na espécie. Inflorescências masculinas maiores e com maior número de flores parecem ser a regra entre plantas dióicas (Bawa & Opler 1975, Lloyd & Webb 1977, Beach 1981, Bullock et al 1983, Armstrong & Irvine 1989a. Esse fenômeno aumenta o "display" floral masculino, melhorando a atração de visitantes (Bawa & Opler 1975, Anderson & Symon 1989.…”

Section: Discussionunclassified

“…A maturação de frutos na população estudada (12,1%) também foi alta quando comparada àquela de outras espécies dióicas entomófilas que apresentam limitação de pólen [1% em Myristica insipida R. Br. (Armstrong & Irvine 1989a) e em Neolitsea dealbata R. Br. (House 1992); 1,5% em Virola sebifera Aubl.…”

Section: Discussionunclassified

Biologia reprodutiva de Tapirira guianensis Aubl. (Anacardiaceae), uma espécie dióica em mata de galeria do Triângulo Mineiro, Brasil

Lenza¹,

Oliveira²

2005

Rev. bras. Bot.

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-(Reproductive biology of Tapirira guianensis Aubl. (Anacardiaceae), a dioecious species, in a gallery forest of Triângulo Mineiro, Brazil). The reproductive biology of a Tapirira guianensis population was studied in Uberlândia, MG. Between September 1997 and April 2000 the phenology was observed for 17 individuals. Floral biology studies involved floral morphology and rewards, anthesis and flower longevity, inflorescence length and number of flowers, flower visitors and pollinators and breeding system. Tapirira guianensis presented massive annual flowering with quick and well synchronized blooming peaks of both male and female individuals. Flowers of both sexes are small (ca. 3mm across) and inconspicuous. Male inflorescences are larger (Mann-Whitney, U = 1769,5; p < 0,001) and bear more flowers (Mann-Whitney, U = 3; p < 0,001) than the female ones. Male flower offer pollen and nectar while female flowers produce only nectar to flower visitors, all insects (41 species), mainly small social bees and flies. Flower opening occurred both during the day and night for flowers of both sexes and female flowers presented greater longevity. Fruit production and maturation after cross pollination (23,5% and 12,1% respectively) were much larger than from apomixis experiments (1,3% and 0,45% respectively) (χ 2 0,05,1 = 561,4; p < 0,001 for fruit production; χ 2 0,05,1 = 283,8; p < 0,001 for fruit maturation). Synchronous flower opening, greater floral display of male inflorescences and greater longevity of female flowers of T. guianensis probably increased pollination and consequently fruit production and maturation. Low fruit production from apomixis shows the vital role of pollination agents to the reproduction of T. guianensis, a species of widespread distribution and ecological importance.Key words -Anacardiaceae, breeding systems, dioecy, phenology, pollination RESUMO -(Biologia reprodutiva de Tapirira guianensis Aubl. (Anacardiaceae), uma espécie dióica, em mata de galeria do Triângulo Mineiro, Brasil). Foi estudada a biologia reprodutiva de uma população de Tapirira guianensis em Uberlândia, MG. Entre setembro de 1997 e abril de 2000 foi caracterizado o comportamento fenológico reprodutivo de 17 indivíduos da população. Nas análises da biologia floral foram determinados a morfologia e os recursos florais, o período de abertura e de duração das flores, o comprimento e o número de flores por inflorescências, os visitantes florais e o sistema reprodutivo. Tapirira guianensis apresentou floração anual e massiva com picos de floração rápidos e altamente sincrônicos entre os dois sexos. As flores dos dois sexos são pequenas (ca. 3 mm de diâmetro) e inconspícuas. As inflorescências masculinas são maiores (Mann-Whitney, U = 1769,5; p < 0,001) e produzem mais flores (Mann-Whitney, U = 3; p < 0,001) que as femininas. As flores masculinas oferecem pólen e néctar e as femininas apenas néctar aos visitantes florais, todos insetos (41 espécies), principalmente pequenas abelhas sociais e moscas. A antese foi tanto diurna q...

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Flowering, Sex Ratios, Pollen-Ovule Ratios, Fruit Set, and Reproductive Effort of a Dioecious Tree, Myristica insipida (Myristicaceae), in Two Different Rain Forest Communities

Cited by 81 publications

References 0 publications

Growth Rates, Survivorship, and Sex Ratios of Juniperus virginiana on the New Jersey Piedmont from 1963 to 2000

Growth Rates, Survivorship, and Sex Ratios of Juniperus virginiana on the New Jersey Piedmont from 1963 to 2000

Trioecy in Coccoloba cereifera Schwacke (Polygonaceae), a narrow endemic and threatened tropical species

Biologia reprodutiva de Tapirira guianensis Aubl. (Anacardiaceae), uma espécie dióica em mata de galeria do Triângulo Mineiro, Brasil

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