Honey bees are essential for pollination of Vitellaria paradoxa subsp. paradoxa (Sapotaceae) in Burkina Faso

Lassen, Kristin Marie; Nielsen, Lene Rostgaard; Lompo, Djingdia; Dupont, Yoko L.; Kjær, Erik Dahl

doi:10.1007/s10457-016-0007-z

Cited by 9 publications

(28 citation statements)

References 41 publications

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“…5). This significant difference in mean weight agrees with Lassen et al (2018) and Stout et al (2018) who recorded heavier nuts under open pollination as compared with bagged inflorescences. This could be due to the ability of pollination to mediate the production of growth hormones in plants (Klatt et al 2013).…”

Section: Influence Of Insect Pollination On Fruit Production and Kernsupporting

confidence: 89%

“…The yield of V. paradoxa can therefore be influenced significantly by the availability of insect pollinators (Okullo 2004). In the study of Lassen et al (2018), the exclusion of larger bees (honeybee) from accessing shea flowers resulted in 35% reduced fruit yield which indicates high dependence on honeybees for pollination.…”

Section: Influence Of Insect Pollination On Fruit Production and Kernmentioning

confidence: 98%

“…It is an insect-pollinated plant (Hall et al 1996) in which floral structures and sequence of events in anthesis are known to favor pollen out-crossing (Okullo 2004). Stingless and honeybees have been identified as the primary pollinators of V. paradoxa in most countries including Ghana, Burkina Faso, and Uganda (Okullo 2004;Kwapong 2014;Lassen et al 2018). The studies of Okullo (2004) and Lassen et al (2018) reported reduced fruit set in shea when insect pollination and bagged inflorescences were compared.…”

Section: Introductionmentioning

confidence: 99%

“…Stingless and honeybees have been identified as the primary pollinators of V. paradoxa in most countries including Ghana, Burkina Faso, and Uganda (Okullo 2004;Kwapong 2014;Lassen et al 2018). The studies of Okullo (2004) and Lassen et al (2018) reported reduced fruit set in shea when insect pollination and bagged inflorescences were compared. However, information on insect-pollinated plants will remain incomplete until we estimate the quantity of shea yield dependent on insect pollination as well as the monetary value of insect pollination services.…”

Section: Introductionmentioning

confidence: 99%

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Insect pollinator dependence of shea (Vitellaria paradoxa C.F. Gaertn.) in the Guinea Savanna zone of Ghana

2019

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Shea (Vitellaria paradoxa C.F. Gaertn.) is a multipurpose tree species indigenous to the Sudano Sahelian zone of Africa and occurs as the most abundant economic tree species in northern Ghana. The edible oil (shea butter) extracted from shea kernel is ranked as the most economic product of the species. Although fruit set and yield of shea are known to be influenced by insect pollination, the actual contribution of insect pollinators to its reproductive success has rarely been studied. This study estimated the percentage insect pollinator dependence and monetary value of insect pollination per bag of shea kernel (85 kg) in the Guinea savanna zone. Open pollination and insect exclusion treatments were applied to the flowers of 18 randomly selected matured shea trees and observed from the onset of flowering to fruit maturity. Proportion of total production value attributed to insect pollination approach was used in estimating the monetary value of pollination per bag of shea kernel with the average market price as proxy. The study revealed an insect pollinator dependence of 77% and 73% for fruit set and dry kernel yield, respectively. Mean number of fruit set per inflorescence varied significantly between insectexcluded and open-pollinated inflorescences (p < 0.05). The monetary value of insect pollination was estimated at GH₵ 73.21 (US$ 18.67) per bag of kernel as of August 2016. Shea is a high insect pollinator-dependent species and the conservation of insect pollinators would be critical to the sustainability of yield.

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Section: Influence Of Insect Pollination On Fruit Production and Kernsupporting

confidence: 89%

Section: Influence Of Insect Pollination On Fruit Production and Kernmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Insect pollinator dependence of shea (Vitellaria paradoxa C.F. Gaertn.) in the Guinea Savanna zone of Ghana

2019

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“…According to the Most Effective Pollinator Principle, a flower’s characteristics will be molded by those pollinators that visit it most frequently and effectively in the region where it is, but this does not mean that the flower is pollinated exclusively by this vector (sensu Stebbins, 1970). Pollination by the Hymenoptera (mainly bees) and/or Diptera orders is common in Sapotaceae species (e.g., Manilkara subsericea , Pouteria venosa , Sideroxylon obtusifolium and Vitellaria paradoxa ) (Gomes & Pinheiro, 2007; Gomes et al, 2010; Kiill et al, 2014; Lassen et al, 2018) and other families with floral attributes similar to neotropical Sapotaceae, such as Erythroxylaceae, Flacourtiaceae (e.g., Bawa et al, 1985; Oliveira & Gibbs, 2000) and Rhamnaceae (e.g., Medan & Arce, 1999 and references). In Panama, Chrysophyllum cainito seems to be pollinated mainly by species of Tetragonisca bees (Gonzálvez, Chen, & Rodríguez‐Gironés, 2015; Parker et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Chrysophyllum marginatum (Sapotaceae): Generalist pollination and cryptic gynomonoecious

Sigrist

Leme

Fabiano

et al. 2021

Plant Species Biology

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Chrysophyllum (Chrysophylloideae, Chrysophylleae) is the second largest genus in the Sapotaceae. Studies of pollination ecology in this genus are non‐existent, although there are records of entomophily for this family. Considering the lack of detailed studies on pollination ecology and sexual systems in Chrysophyllum species, we investigate the floral morphology and biology and floral visitors of Chrysophyllum marginatum to verify which sexual system is present in the studied population and whether flowers of this species are visited and pollinated by different insect groups. The population of C. marginatum has weak and cryptic gynomonoecy because the plants produce a low percentage of functionally pistillate flowers (4.2%) and these flowers appear to be perfect flowers (hermaphrode). Flowers of C. marginatum are phenotypically, ecologically and functionally generalist because: (a) they are actinomorphic, open and not restrictive in terms of access to floral resources; (b) they are visited by 26 species of insects that are potential pollinators; and (c) among these species several groups can be effective pollinators, mainly bees and flies, according to the most effective pollinator principle. We consider bees and flies to be the main pollinator group of C. marginatum, due to their high visitation rate, richness and intrafloral visiting behavior, and because they especially forage among plant individuals and are able to promote xenogamy. Nectaries were found in the ovary base and osmophores in the petal margins, as floral attractants. For Chrysophyllum, this is the first record of gynomonoecy and for the family this is considered the second record. Chrysophyllum marginatum has generalist and entomophilous pollination, as recorded in other Sapotaceae Neotropical species.

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Beekeeping improves shea pollination and fruit set in West African agroforestry parklands

Nasare,

Stout,

Kwapong

2024

Ecol Sol and Evidence

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Shea (Vitellaria paradoxa C.F. Gaertn) is a fruit tree of domestic and industrial importance in arid and semi‐arid regions of Sub‐Saharan Africa. Fruit set is largely dependent on insect pollination but recent studies have revealed a pollen deficit. The introduction of managed bees into orchards is an effective approach for enhanced pollination services in temperate climates. However, there is limited information to guide the adoption of this practice in agroforestry parklands. This study investigated the effect of managed honey bee colonies (Apis mellifera) on fruit yield of shea in six parklands across three regions of Ghana. Tree proximity to the apiary had a detectable effect on fruit set within a 500 m range of the apiary. Proximity of shea trees to apiary was significantly related to number of immature fruit set but not number of mature fruits. Fruit weight and size were not significantly related to distance from apiary or pollination treatment. This implies that the introduction of beekeeping has the potential to address shea pollination deficit at least within a 500 m range of the apiary. Further studies are needed to determine the optimal hive density per acreage of shea parkland to maximise pollination services.

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Honey bees are essential for pollination of Vitellaria paradoxa subsp. paradoxa (Sapotaceae) in Burkina Faso

Cited by 9 publications

References 41 publications

Insect pollinator dependence of shea (Vitellaria paradoxa C.F. Gaertn.) in the Guinea Savanna zone of Ghana

Insect pollinator dependence of shea (Vitellaria paradoxa C.F. Gaertn.) in the Guinea Savanna zone of Ghana

Chrysophyllum marginatum (Sapotaceae): Generalist pollination and cryptic gynomonoecious

Beekeeping improves shea pollination and fruit set in West African agroforestry parklands

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