Pollen nutritional content and digestibility for animals

Roulston, T’ai H.; Cane, James H.

doi:10.1007/978-3-7091-6306-1_10

Cited by 284 publications

(339 citation statements)

References 94 publications

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“…For the nectarless rewarding plants in Pedicularis, its pollen may be major food resource of protein of bumblebee species (Goulson 1999;López et al 1999;Roulston and Cane 2000). This suggests that most pollens of the group adhering to pollinators bodies may be transported back colony rather than exported to other plants for pollination, which lead to great pollen wastage.…”

Section: Discussionmentioning

confidence: 96%

Primary floral allocation per flower in 12 Pedicularis (Orobanchaceae) species: significant effect of two distinct rewarding types for pollinators

Zhang

Wang

2011

J Plant Res

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For animal-pollinated hermaphrodite plants, the factors that affect floral allocation were usually assigned to extrinsic (environment) and intrinsic ones (resources status). Few studies focused on the effect of rewarding type of plants (pollen vs. nectar and pollen). In this study, we investigated the variation in floral allocation per flower with respect to two distinct rewarding types for pollinators in 12 Pedicularis species in alpine regions, testing for the effects of species, plant size, and elevation simultaneously. The result showed that the rewarding type affected floral allocation significantly, and there was a female-biased floral allocation pattern in nectarless rewarding species relative to nectar and pollen rewarding ones and provided a new insight into variation in floral allocation. It was discussed with respect to activities and foraging behavior of pollinators on the basis of sex allocation theory. Moreover, environmental conditions (elevation) may also play a relatively important role in determining patterns of variation in floral allocation per flower, whereas plant size may not.

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Section: Discussionmentioning

confidence: 96%

Primary floral allocation per flower in 12 Pedicularis (Orobanchaceae) species: significant effect of two distinct rewarding types for pollinators

Zhang

Wang

2011

J Plant Res

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“…is highly depending on the plant species (Schausberger 1992;van Rijn and Tanigoshi 1999;Pratt et al 1999). This might be attributed to the variable nutritional value and digestibility of pollen coming from different plant species (Roulston and Cane 2000). Moreover, the nutritional profile of pollen was shown to be variable among different maize hybrids (one transgenic and several nontransgenic) (Lundgren and Wiedenmann 2004).…”

Section: Discussionmentioning

confidence: 99%

Assessing the Effects of Bt Maize on the Predatory Mite Neoseiulus cucumeris

et al. 2006

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The investigation of Neoseiulus cucumeris in the context of the ecological risk assessment of insect resistant transgenic plants is of particular interest as this omnivorous predatory mite species is commercially available and considered important for biological control. In a multitrophic feeding experiment we assessed the impact of Bt maize on the performance of N. cucumeris when offered spider mites (Tetranychus urticae) reared on Bt (Bt11, Syngenta) or non-Bt maize (near isogenic line) and Bt or non-Bt maize pollen as a food source. Various parameters including mortality, development time, oviposition rate were measured. Spider mites were used as a prey for N. cucumeris, since these herbivores are known to contain similar levels of Cry1Ab toxin, when reared on Bt maize, as those found in the transgenic leaf material. In contrast, toxin levels in pollen of this transgenic cultivar are very low. No differences in any of the parameters were found when N. cucumeris was fed with spider mites reared on Bt and non-Bt maize. Pollen was shown to be a less suitable food source for this predator as compared to spider mites. Moreover, subtle effects on female N. cucumeris (9% longer development time and 17% reduced fecundity) were measured when fed with pollen originating from Bt maize as compared to non-Bt maize pollen. Our findings indicate that the predatory mite N. cucumeris is not sensitive to the Cry1Ab toxin as no effects could be detected when offered Bt-containing spider mites, and that the effects found when fed with Bt maize pollen can be assigned to differences in nutritional quality of Bt and non-Bt maize pollen. The significance of these findings is discussed with regard to the ecological relevance for risk assessment of transgenic plants.

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“…Pollen consumption provides higher quantities of nutrients such as amino acids than nectar (Stanley and Linskens 1974;van Rijn and Tanigoshi 1999a, b;Roulston and Cane 2000), and pollen consumption may be particularly important for female mites, which need protein for egg laying (Royce and Krantz 1989;T. Velázquez and J. F. Ornelas, unpublished data).…”

Section: Discussionmentioning

confidence: 95%

Pollen consumption by flower mites in three hummingbird-pollinated plant species

Velázquez

Ornelas

2009

Exp Appl Acarol

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Laboratory studies suggest that pollen consumption by flower mites may decrease the male fitness of the plant by reducing the available pollen for dispersal. Here we assessed pollen consumption by flower mites under natural conditions in three plant species with long-lived, protandrous flowers, Moussonia deppeana (Gesneriaceae), Lobelia laxiflora and L. cardinalis (Lobeliaceae). Total pollen mass was measured after 24 and 48 h in flowers exposed to flower mites and excluded from hummingbirds, flowers exposed to mites and hummingbird visitation, and in flowers recently opened with dehisced anthers. Compared with recently opened flowers, pollen availability was reduced about half in the presence of flower mites and the same effect was observed in the three plant species. Our results suggest that flower mites are removing a great deal of pollen and the reduction of pollen implies the possibility of direct impact on pollen transfer.

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Pollen nutritional content and digestibility for animals

Cited by 284 publications

References 94 publications

Primary floral allocation per flower in 12 Pedicularis (Orobanchaceae) species: significant effect of two distinct rewarding types for pollinators

Primary floral allocation per flower in 12 Pedicularis (Orobanchaceae) species: significant effect of two distinct rewarding types for pollinators

Assessing the Effects of Bt Maize on the Predatory Mite Neoseiulus cucumeris

Pollen consumption by flower mites in three hummingbird-pollinated plant species

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