Pollen and flower volatiles in two Rosa species

Dobson, Heidi E. M.; Bergström, Jakob; Bergström, Günnar; Groth, Inga

doi:10.1016/s0031-9422(00)82464-4

Cited by 72 publications

(40 citation statements)

References 16 publications

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“…Numerous studies have been published on volatile compounds from Rosa petals. More than 400 volatile compounds have been described in the floral flavor of various rose varieties (Dobson et al, 1987;Pavlov et al, 2005;Rusanov et al, 2011). As far as we know, volatile compounds in fruits of rosehip species were determined by HS-SPME/GC-MS in only one study (Demir et al, 2014), and no research has been previously performed by Im-SPME/GC-MS.…”

Section: Resultsmentioning

confidence: 99%

Determination of fatty acids and volatile compounds in fruits of rosehip(Rosa L.) species by HS-SPME/GC-MS and Im-SPME/GC-MS techniques

Murathan¹,

Zarifikhosroshahi²,

Kafkas³

2016

Turk J Agric For

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IntroductionHorticulture is concerned with plants that are used by people for food, either as edible products or for culinary ingredients, for medicinal use, or for ornamental and aesthetic purposes. They are a genetically very diverse group and play a major role in modern society's end economy. They are important components of traditional food, but are also central to healthy diets of modern urban populations (

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Section: Resultsmentioning

confidence: 99%

Determination of fatty acids and volatile compounds in fruits of rosehip(Rosa L.) species by HS-SPME/GC-MS and Im-SPME/GC-MS techniques

Murathan¹,

Zarifikhosroshahi²,

Kafkas³

2016

Turk J Agric For

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“…Knudsen & Tollsten (1993) relataram que a fragrância do pólen de espécies do gênero Rosa (Rosaceae) é rica em compostos geranólicos. Dobson et al (1987) demonstraram que geranial está presente no pólen de Rosa rugosa Thunb., que oferece pólen como recurso. Embora seja interessante o fato de substâncias que ocorrem no aroma do pólen de algumas espécies estarem presentes em uma espécie com pseudopólen como recurso, estudos ainda são necessários testando as substâncias no campo para comprovação de que o odor possa estar envolvido na atração dos polinizadores.…”

Section: Resultsunclassified

Biologia reprodutiva e polinização de duas espécies de Polystachya Hook. no Sudeste do Brasil: evidência de pseudocleistogamia em Polystachyeae (Orchidaceae)

Pansarin¹,

Amaral²

2006

Rev. bras. Bot.

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-(Reproductive biology and pollination of two species of Polystachya Hook. in southeastern Brazil: evidence of pseudocleistogamy in Polystachyeae (Orchidaceae)). Phenology, floral biology, pollinators, breeding system and natural fruit set of Polystachya estrellensis Rchb. f. and P. concreta (Jacq.) Garay & H. R. Sweet were studied in mesophytic forests at Serra do Japi, and in mangroves at a seashore plain at Picinguaba, respectively. Both study areas are natural reserves in southeastern Brazil. Both species flower in summer, are epiphytes and produce terminal inflorescences with up to 150 non-resupinate flowers. The flowers produce a citric fragrance, mainly in the warmest hours of the day. Both species are pollinated by solitary and social small native bees, which collect pseudopollen from the lip of the flowers. The pollinarium is placed frontally on the head of the bees, when they are collecting pseudopollen. Polystachya estrellensis and P. concreta are self-compatible. The majority of flowers of P. estrellensis (96,7%) is cleistogamous, while P. concreta produces only chasmogamous flowers. The cleistogamous flowers of P. estrellensis present dimensions and number of floral elements identical to the chasmogamous, a phenomenon called pseudocleistogamy. The chasmogamous flowers of P. estrellensis, as well as all flowers of P. concreta are pollinator dependent. The natural fruit set of P. estrellensis was higher than that of P. concreta as a consequence of pseudocleistogamy. In mesophytic forests of the Serra do Japi, in which the fruit set of several orchid species is low, mainly because of pollinator scarcity, the strategy presented by P. estrellensis is an important factor that increases the reproductive success of this species, compared with to the non-autogamous members of Epidendroideae that occur in the same region.Key words -cleistogamy, Orchidaceae, Polystachya, pseudopollen, reproductive biology RESUMO -(Biologia reprodutiva e polinização de duas espécies de Polystachya Hook. no Sudeste do Brasil: evidência de pseudocleistogamia em Polystachyeae (Orchidaceae)). A fenologia, a biologia floral e reprodutiva, e o sucesso reprodutivo de Polystachya estrellensis Rchb. f. e P. concreta (Jacq.) Garay & H.R. Sweet foram estudados em matas mesofíticas semidecíduas da Serra do Japi (Jundiaí, SP), e na planície litorânea de Picinguaba (Ubatuba, SP), respectivamente. Ambas as espécies florescem no verão. Elas são principalmente epífitas e produzem inflorescências terminais com até 150 flores não ressupinadas. As flores exalam odor cítrico suave, principalmente nas horas mais quentes do dia. Ambas as espécies foram polinizadas por pequenas abelhas nativas, solitárias e sociais, que coletam pseudopólen do labelo das flores. O polinário é depositado na face frontal da cabeça das abelhas, enquanto elas recolhem pseudopólen. Tanto P. estrellensis como P. concreta são autocompatíveis. A maioria das flores de P. estrellensis (96,7%) é cleistógama, enquanto P. concreta produz apenas flores casmógamas. As flores...

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“…It was shown previously that stamens and pollen of P. vulgaris and P. rubra produce volatile compounds [19]. The pollen scent is determined by pollenkitt, which contains various compounds such as neutral lipids, carotenoids, flavonoids, izoprenoids (terpenoids), and benzenoids [41][42][43]. The last-mentioned two groups of organics are Tab.…”

Section: Odor Of Pulsatilla Flowersmentioning

confidence: 98%

Ecological aspects of the floral structure and flowering in Pulsatilla species

et al. 2017

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In terms of flowering ecology, Pulsatilla flowers are classified as "pollen flowers" producing inconsiderable amounts of nectar. The aim of this study was to assess the length of the flowering period in Pulsatilla slavica and P. vulgaris and to investigate the structure of the epidermis of the perianth and generative elements of their flowers. Special focus was placed on the structure of hairs and the distribution of stomata. The weight of nectar released by the flowers of the two Pulsatilla species and the content of sugars in the nectar was also evaluated. In SE Poland, both species flowered for similar periods between the second half of April and the first half of May. The flower life-span of both was determined to be 9-14 days. The lower part of each sepal was observed to be covered by long hairs having cellulose-pectin cell walls of varying thickness. Hairs present on the pistil style are thinner; they may provide some protection against cold and can play a role of a secondary pollen presenter for insects. The bowl-shaped structure of the perianth and the nature of the adaxial surface of the sepal epidermis may facilitate reflection of sunlight into the inner parts of the flower, which may contribute to an elevation of the intraflower temperature. This is particularly important for the functionality of the ovary. The surface of the hairs was seen to be covered by a cuticle ensuring water impermeability. Flowers are visited by honeybees, bumblebees, butterflies, and ants, for which nectar and pollen are the main attractants. Ants, which are regarded as illegitimate flower visitors, were found to cause damage to the androecium. The number of fruits produced in the flowers of both Pulsatilla species was lower than 50% of the number of pistils.

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Pollen and flower volatiles in two Rosa species

Cited by 72 publications

References 16 publications

Determination of fatty acids and volatile compounds in fruits of rosehip(Rosa L.) species by HS-SPME/GC-MS and Im-SPME/GC-MS techniques

Determination of fatty acids and volatile compounds in fruits of rosehip(Rosa L.) species by HS-SPME/GC-MS and Im-SPME/GC-MS techniques

Biologia reprodutiva e polinização de duas espécies de Polystachya Hook. no Sudeste do Brasil: evidência de pseudocleistogamia em Polystachyeae (Orchidaceae)

Ecological aspects of the floral structure and flowering in Pulsatilla species

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