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Attributes of individual flowers of Brassica napus L. are affected by defoliation but not by intraspecific competition


, : Attributes of individual flowers of Brassica napus L. are affected by defoliation but not by intraspecific competition. Annals of Botany 88(1): 111-117

To investigate the effect of intraspecific competition on flowering in Brassica napus'Westar , a series of 30 pots was established that spanned a range of one-96 plants per pot. In each pot, the following attributes of individual flowers were quantified: petal length; petal width; stamen length; pistil length; pollen production; diameter of pollen grains; and nectar production. Certain plants contained a transgenic marker that enabled the vigour of their pollen to be quantified by screening the progeny from post-pollination trials against conventional male competitors. Plant size was strongly affected by plant density; plants in the lowest density pots comprised ten-times more dry biomass than individuals in the highest density pots. However, none of the attributes of individual flowers varied with density. In contrast, the number of flowers per plant declined rapidly with density. In the face of resource scarcity, the plants apparently conserved flower size rather than flower number. There was no difference in the response to density between transgenic and conventional plants, but transgenic plants obtained more fertilizations than expected in post-pollination competition against conventional competitors. A separate experiment demonstrated that B. napus is, nevertheless, capable of plasticity in certain flower attributes (petal size, stamen length) in response to defoliation. Explanations for the stability of flower size relative to flower number are discussed. Copyright 2001 Annals of Botany Company.

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Accession: 003655375

DOI: 10.1006/anbo.2001.1431

PDF Full Text: Attributes of individual flowers of Brassica napus L. are affected by defoliation but not by intraspecific competition


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Abdel Tawab, G.A.; Broda, E.; Kellner, G., 1959: The production of pyruvic acid, oxaloacetic acid and a-oxoglutaric acid from glucose by tissue in culture. Monolayers of chick-embryo mesenchyma tissue and of human tumor tissue (HeLa) were incubated for 24 hr. with radioactive glucose. When the supply of glucose per cell is raised, the ratio of radioactive lactic acid to radioactive CO2 accumulated in...

Oktay C., 1970: Periodontal pathology originating from accessory canals and same important points in their treatment. Ankara Universitesi Tip Fakultesi Mecmuasi 23(5): 1513-1518

Aldrich, J. R., 1996: Sex pheromones in Homoptera and Heteroptera. Sex pheromones have been chemically identified for scale insects (Margarodidae and Diaspididae), mealybugs (Pseudococcidae) and aphids (Aphididae) among Homoptera, and for plant bugs (Miridae), assassin bugs (Reduviidae), stink bugs (Pentatomidae)...

Ohnishi, H.; Kosuzume, H.; Inaba, H.; Okura, M.; Shimada, S.; Tajima, H.; Suzuki, Y., 1981: Effects of inosiplex on viral growth and experimental viral infections. Kansenshogaku Zasshi. Journal of the Japanese Association for Infectious Diseases 55(7): 490-500

Seefeld, F.; Dusing, M., 1989: Gas chromatography determination of metalaxyl in plant material. The control of mycosis on potatoes, tomatoes and cucumbers with metalaxyl demands toxicological evaluation of its residues. It was necessary to elaborate a gaschromatographic method for the determination of the active compound. The plant materials...

Liu, H.; Espinoza-Lewis, Rón.A.; Chen, C.; Hu, X.; Zhang, Y.; Chen, Y., 2013: The role of Shox2 in SAN development and function. Embryonic development is a tightly regulated process, and many families of genes functions to provide a regulatory genetic network to achieve such a program. The homeobox genes are an extensive family that encodes transcription factors with a char...

Shioji, K.; Kishimoto, C.; Nakamura, H.; Toyokuni, S.; Nakayama, Y.; Yodoi, J.; Sasayama, S., 2000: Upregulation of thioredoxin (TRX) expression in giant cell myocarditis in rats. To examine the possible involvement of a redox regulating mechanism in the pathogenesis of immune-mediated myocarditis, myocarditis was induced by immunization of porcine cardiac myosin in rats and immunohistochemistry and Western blot for thiored...

Roth, Barry, 1999: A new species of Gastrocopta from the Deep River Formation, late Oligocene or early Miocene, Montana. Veliger 42(3): 286-288, July 1

Isner, J.M., 2000: Angiogenesis: a "breakthrough" technology in cardiovascular medicine. The identification of angiogenic growth factors has generated the opportunity for novel therapies in the treatment of a variety of diseases. Antibodies and/or naturally occurring angiogenesis inhibitors are being investigated clinically to antagon...

Pusch, H.J.; Pusch, M., 1974: Significance of physical activity and purposeful programs in old age. Zeitschrift für Allgemeinmedizin 50(26): 1134-1137