Pollination ecology of Citrullus lanatus at Yatta, Kenya

Njoroge, Grace N.; Gemmill, Barbara; Bussmann, Rainer W.; Newton, L. E.; Ngumi, Victoria Wambui

doi:10.1079/ijt20042

Cited by 23 publications

(13 citation statements)

References 3 publications

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“…The flowers were marked one day before the evaluation of these parameters. The anther dehiscence period was measured with methodologies previously described (Njoroge et al, 2004). The stigmatic receptivity of hermaphrodite flowers in all cultivars was determined with hydrogen peroxide (H 2 O 2 ) following the methodology described by Dafni et al (2005).…”

Section: Floral Biology Of the Six Melon Cultivarsmentioning

confidence: 99%

Diversity and flower-visiting rates of bee species as potential pollinators of melon (Cucumis melo L.) in the Brazilian Cerrado

Tschoeke

Oliveira

Dalcin

et al. 2015

Scientia Horticulturae

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a b s t r a c tAlthough bees are important pollinators in many ecosystems worldwide, studies on bee diversity and their contribution to pollination of commercial plants in the Brazilian Cerrado (savannah-like biome) are scarce. The Cerrado biome covers approximately 23% of Brazil and is one of the world's most important agricultural frontiers. Here, we conducted field experiments in the Brazilian Cerrado to evaluate the diversity of bees, their foraging behaviors and flower visiting periods, and their potential contribution to the performance of six melon (Cucumis melo L.) cultivars. Five bee species (Apis mellifera, Halictus sp., Plebeia sp., Trigona pallens, and T. spinipes) were recorded visiting both male and hermaphrodite flower types of all C. melo cultivars. Whereas A. mellifera showed two peaks of flower visitation (an intense first one between 8:00 a.m. and 11:00 a.m. and a second less intense one after 4:00 p.m.), all other bee species visited the C. melo flowers only in the morning, with intensities and visitation peaks similar to those of A. mellifera. All of these bees collected nectar and pollen. Our results also indicated a moderate correlation between the intensity of bee visitation and fruit weight, demonstrating that all of these bees had the potential to pollinate C. melo and to influence its productivity. Except for the cultivar 'Hibrix', all the other cultivars showed economic feasibility and produced fruits of marketable sizes, with an estimated yield (over 25 tons/ha) in the range registered in other Brazilian regions.

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Section: Floral Biology Of the Six Melon Cultivarsmentioning

confidence: 99%

Diversity and flower-visiting rates of bee species as potential pollinators of melon (Cucumis melo L.) in the Brazilian Cerrado

Tschoeke

Oliveira

Dalcin

et al. 2015

Scientia Horticulturae

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“…The Park covers an area of 21 km 2 and was gazetted in 1967. The climatic conditions show variations in rainfall of between 760 and 1015 mm per annum with temperature ranges of 24-26 • C (Njoroge et al 2004). Four vegetation types comprising bushlands, closed canopy forests, open grasslands and herbaceous vegetation characterise the Park (Njoroge et al 2004).…”

Section: Study Areamentioning

confidence: 99%

Socio-economics and wildlife conservation of a peri-urban national park in central Kenya

Owino

Jillo

Kenana

2012

Journal for Nature Conservation

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“…No Kenya, estudos realizados com a melancieira indicaram que as abelhas Apis mellifera visitaram em maior número as flores masculinas, porém permaneceram mais tempo nas flores femininas, o que pode ser benéfico para a polinização, uma vez que, quando as abelhas visitam as flores femininas já estão com bastante pólen no corpo, o que garante uma polinização efetiva (NJOROGE, 2004).…”

Section: Introductionunclassified

Floração e morfologia floral de variedades de melancieira em Juazeiro-BA

et al. 2015

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Resumo-A melancieira apresenta comumente flores masculinas e femininas na mesma planta, necessitando assim dos serviços de polinização para a transferência dos grãos de pólen e consequente produção de frutos. A atratividade aos polinizadores está na dependência dos recursos florais oferecidos como recompensa durante as visitas, e como consequência a planta é beneficiada com a polinização. O objetivo desse trabalho foi registrar aspectos relevantes da floração incluindo a razão sexual e a descrição da morfologia floral de variedades de melancieira. As variedades demelancieira utilizadas foram, Congo, Elisa, Crimson super e Charleston super, em cultivo orgânico, com irrigação por gotejamento. Foram avaliados quatro tratamentos e quatro repetições, utilizando o delineamento experimental inteiramente casualizado. Para todas as variedades analisadas, foi registrada a emissão inicial de flores masculinas. Não foi registrada diferença significativa na emissão de flores femininas entre as variedades, porém para as flores masculinas a variedade Congo apresentou um maior número. Foi registrada diferença nas características da morfologia floral entre variedades e tipos florais em relação ao diâmetro e altura da flor. A presença de flores hermafroditas foi registrada com média de 1,45 (Crimson) a 0,15 flores por planta (Congo). A variedade Charleston apresentou a menor média de dias para a emissão da primeira flor feminina em relação a masculina (4,6±2,81) já a Congo apresentou a maior média (9,05±3,28). A menor razão sexual foi registrada para a variedade Elisa(1:13,32) e a maior para a Congo (1:24,05). Os menores períodos de floração foram registrados para as variedades Crimson e Elisa. Palavras-chave-Citrulus lanatu; biologia floral; razão sexualAbstract-The watermelon commonly presents male and female flowers on the same plant, thus requiring the pollination services for the transfer of pollen grains and consequent production of fruits. The attractiveness to pollinators is dependent on the floral resources offered as a reward during visits and as a result the plant benefits from pollination. The objective of this study was to record important aspects of flowering including sex ratio and the description of floral morphology of varieties of watermelon. The varieties of watermelon were used, Congo, Elisa, super super Crimson and Charleston in organic farming, drip irrigation. Four treatments and four repetitions were performed using a completely randomized design. For all varieties analyzed, it was registered the initial issue of male flowers. It did not record significant difference in the issue of female flowers between varieties, but the male flowers to the Congo variety presented more. There was recorded differences in the characteristics of morphology flower varieties and types in relation to the height and flower diameter. The presence of hermaphrodite flowers was recorded with an average of 1.45 (Crimson) 0.15 flowers per plant (Congo). The Charleston variety had the lowest average number of days to issue the first ...

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Pollination ecology of Citrullus lanatus at Yatta, Kenya

Cited by 23 publications

References 3 publications

Diversity and flower-visiting rates of bee species as potential pollinators of melon (Cucumis melo L.) in the Brazilian Cerrado

Diversity and flower-visiting rates of bee species as potential pollinators of melon (Cucumis melo L.) in the Brazilian Cerrado

Socio-economics and wildlife conservation of a peri-urban national park in central Kenya

Floração e morfologia floral de variedades de melancieira em Juazeiro-BA

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