Change in floral nectar components from fresh to senescent flowers ofCapparis spinosa (Capparidaceae), a nocturnally flowering Mediterranean shrub

Petanidou, Theodora; Laere, André J. Van; Smets, Erik

doi:10.1007/bf00985919

Cited by 63 publications

(64 citation statements)

References 37 publications

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“…Furthermore, Zimmerman (1983) found that watered plants of Delphinium nelsonii produced significantly more nectar per flower than the un-watered controls. Other studies have also shown that water availability, in years of higher precipitation or under irrigation, increased nectar production (Wyatt et al 1992;Petanidou et al 1999;Keasar et al 2008) or decreased sugar concentrations (Petanidou et al 1995). In the present study, sugar concentration remained unchanged, whereas nectar volume decreased substantially.…”

Section: Discussionsupporting

confidence: 58%

Herbivory by sucking mirid bugs can reduce nectar production in Asphodelus aestivus Brot.

Samocha

Sternberg

2010

Arthropod-Plant Interactions

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This experimental study focused on the effects of a mirid bug herbivore, Capsodes infuscatus on the flower nectar yield of a Mediterranean geophyte, Asphodelus aestivus. The effects of increasing densities of adult C. infuscatus bugs on A. aestivus, on the nectar volume and concentration were examined. Significant decreases were found in the number of flowers and nectar production as C. infuscatus densities increased. Analysis of covariance (ANCOVA) showed that nectar production was not affected by environmental variables (air temperature, relative air humidity and day-time) that were treated as covariates for the various bug herbivory intensities. Sugar concentration did not vary significantly among treatments, indicating that abiotic conditions were not responsible for differing nectar amounts. In light of A. aestivus's dependence on pollinator visits to produce seeds, we conclude that C. infuscatus could impair pollination success by reducing the amount of nectar in flowers. To the best of our knowledge, the present study is the first to show that insect herbivores do not necessarily have to remove segments from the flower in order to decrease nectar secretion.

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Section: Discussionsupporting

confidence: 58%

Herbivory by sucking mirid bugs can reduce nectar production in Asphodelus aestivus Brot.

Samocha

Sternberg

2010

Arthropod-Plant Interactions

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“…Recent studies using improved methods of quantitation such as HPLC have demonstrated that the amino acid composition of Impatiens capensis nectar can vary significantly within a single plant, within a population, and also between populations (Lanza et al, 1995). Other investigators have found that amino acid concentrations may vary with the age of the flower (Gottsberger et al, 1990;Petanidou et al, 1996). Although the concentrations of amino acids in nectar from any given species can be quite variable, Gardener and Gillman (2001a) found that the overall amino acid composition of nectar is generally more highly conserved than the individual amino acid concentrations.…”

Section: Nectar Amino Acids Are Under the Control Of Environmental Famentioning

confidence: 97%

Nectar chemistry

Nicolson

Thornburg

2007

Nectaries and Nectar

395

513

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“…Investigations by Petanidou, Van Laere & Smets (1996) have also revealed that nectar secretion in Capparis spinosa L. depends on precipitation.…”

Section: Water Stressmentioning

confidence: 99%

Does temperature stress induce nectar secretion in Mediterranean plants?

Petanidou

Smets

1996

New Phytologist

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SUMMARYWe Studied the effect of temperature on nectar secretion in Thymiis capitatus, a typical labiate of phrygana (i,e, the garrigue of the East Mediterranean Basin). Experiments were carried out at controlled temperatures in a climatic chamber. We measured the nectar standing crop of the flowers at the end of the first day of their anthesis. All nectar values (i,e, volume per flower, sugar content and concentration) increased witb temperature up to 38 °C, as long as the plants were not water stressed. However, in the open and under normal temperate conditions (i,e, at relatively low temperatures) nectar secretion depended more on changes in solar irradiance than on temperature.Under the same conditions, nectar secretion in Ballota acetabulosa, a species that is sympatric and coflowering with T. capitatus, was afTected neither by light nor temperature. Since in the wild these two species are found in different microhabitats (full sun and shade, for T. capitatus and B. acetabulosa, respectively), we attribute the differences we observed to the differential natural adaptation of the plants to these factors. We conclude that T. capitatus is very well adapted to the Mediterranean conditions. By performing optimally as a nectar source at high temperatures, it can support a very large insect fauna that visits its flowers for nectar. It is in fact a temperatureinduced cornucopian species, K ey words: Nectar secretion, temperature effect, Thymus capitatus, Ballota acetabulosa, Mediterranean plants. INTRODrcTIONNectar secretion rate is temperature dependent (

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Change in floral nectar components from fresh to senescent flowers ofCapparis spinosa (Capparidaceae), a nocturnally flowering Mediterranean shrub

Cited by 63 publications

References 37 publications

Herbivory by sucking mirid bugs can reduce nectar production in Asphodelus aestivus Brot.

Herbivory by sucking mirid bugs can reduce nectar production in Asphodelus aestivus Brot.

Nectar chemistry

Does temperature stress induce nectar secretion in Mediterranean plants?

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