Flowering, pollen characteristics and insect foraging on Campanula bononiensis (Campanulaceae), a protected species in Poland

Denisow, Bożena; Wrzesień, Małgorzata; Bożek, Małgorzata; Jeżak, Anna; Strzałkowska-Abramek, Monika

doi:10.5586/aa.2014.021

Cited by 5 publications

(8 citation statements)

References 24 publications

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“…Most of the flowers open between 10.00 and 16.00 h, similarly not synchronized opening time was described for the flowers of C. rapunculus by Schlindwein et al [2005]. Similar pattern was also observed in C. bononiensis [Denisow et al 2014] and in C. patula (personal observation; unpublished data).…”

Section: Discussionsupporting

confidence: 75%

“…Nectar-and pollen-yielding plants can be used to improve diversity and population size of pollinators. Therefore, the interest in plant species suitable as food for pollinators is increasing [Denisow et al 2014, Denisow and Wrzesień 2015, Hicks et al 2016. Number of studies have shown that traits of floral rewards (the quantity and quality) impact on insect visitors rate [e.g.…”

Section: Introductionmentioning

confidence: 99%

“…The Campanula flowers are typically entomophilic and attract diverse floral visitors, i.e. pollen-generalists and pollen specialist species, and nectar-feeding insects [Kapyla 1978, Cresswell and Robertson 1994, Blionis and Vokou 2001, Denisow et al 2014, Denisow and Wrzesień 2015. Nectar production in Campanula species has not been adequately studied; the data apply to only few Campanula taxa [Kapyla 1978].…”

Section: Introductionmentioning

confidence: 99%

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NECTAR PRODUCTION IN SEVERAL Campanula SPECIES (CAMPANULACEAE)

Strzałkowska-Abramek¹,

Jachuła²,

Wrzesień³

et al. 2018

Acta Sci.Pol.Hortorum Cultus

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The flowering, nectar production and sugar content were examined in 2012-2013 seasons for three Campanula species (C. persicifolia L., C. glomerata L., C. trachelium L.). The flowers of all studied Campanula spp. are distinctly protandrous; most of them opened between 10.00 and 14.00; only the flowers of C. glomerata continued the opening process until 16.00 (GMT + 2 h). The flower life-span differed between species and was the longest for C. persicifolia -ca. 5.5 days and lasted 3.0-3.5 days in C. glomerata and C. trachelium. The duration of the male phase was 2-3 fold shorter (C. persicifolia and C. glomerata) than the female phase or was equal (C. trachelium). Irrespective of the year of study and the species, the female-biased nectar production pattern was evidenced. The amount of nectar accumulated at the female phase reached 70-87% of the maximum nectar produced by a flower. The total sugar yield (0.4-12.2 g/10 m 2 ) established for the studied species is low compared to other herbaceous meadow species. However, due to diverse insect visitors groups, the Campanula flowers can be recommended to support pollinators in home gardens or on idle lands.

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Section: Discussionsupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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NECTAR PRODUCTION IN SEVERAL Campanula SPECIES (CAMPANULACEAE)

Strzałkowska-Abramek¹,

Jachuła²,

Wrzesień³

et al. 2018

Acta Sci.Pol.Hortorum Cultus

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“…The genus Campanula (Campanulaceae) includes about 400 species distributed mainly in the temperate zone (mainly in Europe and Asia), with nine species recorded in Poland [25][26][27]. Flowers of Campanula are protandrous with a secondary pollen presentation mechanism [5,[28][29][30][31][32][33]. Dichogamous plants with functional separation of gender phases are ideal for use in studies that analyze the male and female impact on different flower functions.…”

Section: Introductionmentioning

confidence: 99%

Nectar secretion and pollen production in protandrous flowers of Campanula patula L. (Campanulaceae)

2018

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Nectar secretion was noted both in the male and female floral phases of the protandrous flowers of Campanula patula (Campanulaceae). Female-biased sugar accumulation was evidenced and plasticity in the duration of sexual phases observed. Flowers in the male phase produced twofold less nectar with lower sugar concentrations compared to female-phase flowers. The sugar mass content averaged 0.6 mg ±0.45 SD per flower in the male phase and 1.4 ±0.5 SD per flower in the female phase. The pollen mass averaged 0.16 mg ±0.10 SD per flower. An understanding of the evolution of functional relationships between floral sexes requires consideration of the compensation of the reproductive costs, including the plastic response to interdependent factors, i.e., photosynthesis and growth, the effect of pollinators, pollen robbers, and external environmental forces.

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“…2 days of flower life span). The flower life span is speciesspecific (van Doorn, 1997;Masierowska, 2006;Denisow et al, 2014b), but is also under the control of various exogenous factors, e.g. the air temperature, air humidity, and whether or not the flower is pollinated (Ashman and Shoen, 1994;Denisow, 2009).…”

Section: Solitary Beesmentioning

confidence: 99%

Nectar and Pollen Production and Insect Visitation on Ornamentals from the Genus Hosta Tratt. (Asparagaceae)

Bożek

Strzałkowska-Abramek

Denisow

2015

Journal of Apicultural Science

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Properly arranged ornamental gardens in both urban and agricultural landscapes can be of a benefit to bees. In this study, we observed the flowering phenology, nectar, and pollen production of the ornamental Hosta species and varieties (H. sieboldiana Engler, H. capitata Nakai, H. crispula Maekawa, H. fluctuans Maekawa, syn. H. sieboldiana var. fluctuans hort., H. undulata var. univittata Miquel (Hylander), syn. H. univittata). Our experiment was conducted in the 2012 - 2014 time period, at the UMCS Botanical Garden in Lublin, Poland (51° 14’ N, 21° 34’ E). The total sugar yield varied almost 5-fold among Hosta ornamentals; the lowest amount was calculated for H. fluctuans (2.31 g per 10 m2) and the highest for H. capitata (11.80 g per 10 m2). The average pollen yield was from 0.24 g per 10 m2 (H. undulata var. univittata) to 9.53 g per 10 m2 (H. capitata). Pollen grains were bilaterally symmetrical, and large-sized. In polar view, they were prolatum (shape index 1.33 - 1.61), while in equatorial view, oblatum (shape index 0.5 - 0.7). Hosta species can complete the summer pasture mainly for bumblebees. In four of the five Hosta representatives, bumblebees accounted for 60 - 70% of the total visits. The honeybee predominated only on the flowers of H. capitata (54 - 71%). Solitary bees were rarely observed (3 - 9% of visits). The phenotypic traits of Hosta flowers (the accumulation of nectar in the deep and narrow perianth tube) reduced the access to nectar reward and restricted an array of insect visitors.

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Flowering, pollen characteristics and insect foraging on Campanula bononiensis (Campanulaceae), a protected species in Poland

Cited by 5 publications

References 24 publications

NECTAR PRODUCTION IN SEVERAL Campanula SPECIES (CAMPANULACEAE)

NECTAR PRODUCTION IN SEVERAL Campanula SPECIES (CAMPANULACEAE)

Nectar secretion and pollen production in protandrous flowers of Campanula patula L. (Campanulaceae)

Nectar and Pollen Production and Insect Visitation on Ornamentals from the Genus Hosta Tratt. (Asparagaceae)

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