Biology Reference
In-Depth Information
Roulston, T.H., Cane, J.H., & Buchmann, S.L. (2000). What governs protein content of
pollen: pollinator preferences, pollen-pistil interactions, or phylogeny?
Ecological Mono-
graphs
,
70
, 617-643.
Rowley, D.A., & Halliwell, B. (1983). Formation of hydroxyl radicals from hydrogen perox-
ide and iron salts by superoxide- and ascorbate-dependent mechanisms: relevance to the
pathology of rheumatoid disease.
Clinical Science (London)
,
64
, 649-653.
Rusterholz, H.P., & Erhardt, A. (1998). Effects of elevated CO
2
on flowering phenology and
nectar production of nectar plants important for butterflies of calcareous grasslands.
Oecologia
,
113
, 341-349.
Sandhu, D.K., & Waraich, M.K. (1985). Yeasts associated with pollinating bees and flower
nectar.
Microbial Ecology
,
11
, 51-58.
Sazima, M., Vogel, S., do Prado, A.L., de Oliveira, D.M., Franz, G., & Sazima, I. (2001). The
sweet jelly of
Combretum lanceolatum
flowers (Combretaceae): a cornucopia resource for
bird pollinators in the Pantanal, western Brazil.
Plant Systematics and Evolution
,
227
,
195-208.
Schwerdtfeger, M. (1996). Die Nektarzusammensetzung der Asteridae und ihre Beziehung zu
Blütenökologie und Systematik.
Dissertationes Botanicae
,
264
, 95 pp. Berlin: Gebrüder
Borntraeger.
Scobell, S.A., & Scott, P.E. (2002). Visitors and floral traits of a hummingbird-adapted cactus
(
Echinocereus coccineus
) show only minor variation along an elevational gradient.
Ameri-
can Midland Naturalist
,
147
, 1-15.
Scogin, R. (1979). Nectar constituents in the genus
Fremontia
(Sterculiaceae): sugars, flavon-
oids, and proteins.
Botanical Gazette
,
140
, 29-31.
Seigler, D., Simpson, B.B., Martin, C., & Neff, J.L. (1978). Free 3-acetoxyfatty acids in floral
glands of
Krameria
species.
Phytochemistry
,
17
, 995-996.
Shiraishi, A., & Kuwabara, M. (1970). The effects of amino acids on the labellar hair chemo-
sensory cells of the fly.
Journal of General Physiology
,
56
, 768-782.
Singaravelan, N., Nee'man, G., Inbar, M., & Izhaki, I. (2005). Feeding responses of free-
flying honeybees to secondary compounds mimicking floral nectars.
Journal of Chemical
Ecology
,
31
, 2791-2804.
Smith, G.F., Van Wyk, B.-E., Steyn, E.M.A., & Breuer, I. (2001). Infrageneric classification
of
Haworthia
(Aloaceae): perspectives from nectar sugar analysis.
Systematics and Geog-
raphy of Plants
,
71
, 391-397.
Smith, L.L., Lanza, J., & Smith, G.C. (1990). Amino acid concentrations in extrafloral nectar
of
Impatiens sultani
increase after simulated herbivory.
Ecology
,
71
, 107-115.
Sols, A., Cadenas, E., & Alvarado, F. (1960). Enzymatic basis of mannose toxicity in honey
bees.
Science
,
131
, 297-298.
Sroka, Z., Cisowski, W., Seredyńska, M., & Luczkiewicz, M. (2001). Phenolic extracts from
meadowsweet and hawthorn flowers have antioxidative properties.
Zeitung für Naturfor-
schung C
,
56
, 739-744.
Stebbins, G.L. (1989). Adaptive shifts toward hummingbird pollination. In: J.H. Bock, &
Y.B. Linhart (Eds.),
The evolutionary ecology of plants
(pp. 39-60). Boulder, Colorado:
Westview Press.
Stephenson, A.G. (1982). Iridoid glycosides in the nectar of
Catalpa speciosa
are unpalatable
to nectar thieves.
Journal of Chemical Ecology
,
8
, 1025-1034.
Stiles, F.G. (1981). Geographical aspects of bird-flower coevolution, with particular reference
to Central America.
Annals of the Missouri Botanical Garden
,
68
, 323-351.
Stiles, F.G., & Freeman, C.E. (1993). Patterns in floral nectar characteristics of some bird-
visited plant species from Costa Rica.
Biotropica
,
25
, 191-205.
