16 research outputs found
The black police: a story of modern Australia / by A. J. Vogan ; with illustrations and map by the author
No full textLibrary's copy has book plate inside front cover.Electronic reproduction.Vogan, A. J. (Arthur James), 1859-194
Review of Music Education in Canada: A Historical Account, by J. Paul Green and Nancy Vogan
No full textabstract: Review of a book on a survey of the history of music education in Canada with emphasis on school music, organized by province
Carbon Costs of Constitutive and Expressed Resistance to a Non-Native Pathogen in Limber Pine.
No full textIncreasing the frequency of resistance to the non-native fungus Cronartium ribicola (causative agent of white pine blister rust, WPBR) in limber pine populations is a primary management objective to sustain high-elevation forest communities. However, it is not known to what extent genetic disease resistance is costly to plant growth or carbon economy. In this study, we measured growth and leaf-level physiology in (1) seedling families from seed trees that have previously been inferred to carry or not carry Cr4, the dominant R gene allele conferring complete, gene-for-gene resistance to WPBR in limber pine, and (2) populations that were and were not infected with C. ribicola. We found that, in the absence of C. ribicola exposure, there was no significant difference in carbon relations between families born from seed trees that harbor the resistance allele compared to those that lack it, either to plant growth and phenology or leaf-level photosynthetic traits. However, post-infection with C. ribicola, growth was significantly reduced in inoculation survivors expressing complete resistance compared to uninoculated seedlings. Furthermore, inoculation survivors exhibited significant increases in a suite of traits including photosynthetic rate, respiration rate, leaf N, and stomatal conductance and a decrease in photosynthetic water-use efficiency. The lack of constitutive carbon costs associated with Cr4 resistance in non-stressed limber pine is consistent with a previous report that the R gene allele is not under selection in the absence of C. ribicola and suggests that host resistance may not bear a constitutive cost in pathosystems that have not coevolved. However, under challenge by C. ribicola, complete resistance to WPBR in limber pine has a significant cost to plant growth, though enhanced carbon acquisition post-infection may offset this somewhat. These costs and effects on performance further complicate predictions of this species' response in warmer future climates in the presence of WPBR
Effects of low atmospheric CO2 and elevated temperature during growth on the gas exchange responses of C3, C3–C4 intermediate, and C4 species from three evolutionary lineages of C4 photosynthesis
No full textWater-use efficiency and nitrogen-use efficiency of C3-C4 intermediate species of Flaveria Juss. (Asteraceae)
No full textCombinatorial results on (1,2,1,2)-avoiding -orbit closures on
No full text35 pages, 18 figuresInternational audienceUsing recent results of the second author which explicitly identify the "-avoiding" -orbit closures on the flag manifold as certain Richardson varieties, we give combinatorial criteria for determining smoothness, lci-ness, and Gorensteinness of such orbit closures. (In the case of smoothness, this gives a new proof of a theorem of W.M. McGovern.) Going a step further, we also describe a straightforward way to compute the singular locus, the non-lci locus, and the non-Gorenstein locus of any such orbit closure. We then describe a manifestly positive combinatorial formula for the Kazhdan-Lusztig-Vogan polynomial in the case where corresponds to the trivial local system on a -avoiding orbit closure and corresponds to the trivial local system on any orbit contained in . This combines the aforementioned result of the second author, results of A. Knutson, the first author, and A. Yong, and a formula of Lascoux and Sch\"{u}tzenberger which computes the ordinary (type ) Kazhdan-Lusztig polynomial whenever is cograssmannian
Sur le théorème de Paley-Weiner d'Arthur
No full textThe Fourier transform of a C¿¿ function, f, with compact support on a real reductive Lie group G is given by a collection of operators ¿Ó(P, ¿Ð, ¿É) := ¿ÎP (¿Ð, ¿É)(f) for a suitable family of representations of G, which depends on a family, indexed by P in a finite set of parabolic subgroups of G, of pairs of parameters (¿Ð, ¿É), ¿Ð varying in a set of discrete series, ¿É lying in a complex finite dimensional vector space. The ¿ÎP (¿Ð, ¿É) are generalized principal series, induced from P. It is easy to verify the holomorphy of the Fourier transform in the complex parameters. Also it satisfies some growth properties. Moreover an intertwining operator between two representations ¿ÎP (¿Ð, ¿É), ¿ÎP(¿Ð, ¿É) of the family, implies an intertwining property for ¿Ó(P, ¿Ð, ¿É) and ¿Ó(P, ¿Ð, ¿É). There is also a way to introduce ¿hsuccessive (partial) derivatives¿h of the family of representations, ¿ÎP (¿Ð, ¿É), along the parameter ¿É, and intertwining operators between subquotients of these successive derivatives imply the intertwining property for the successive derivatives of the Fourier transform ¿Ó. We show that these properties characterize the collections of operators (P, ¿Ð, ¿É) ¿¿ ¿Ó(P, ¿Ð, ¿É) which are Fourier transforms of a C¿¿ function with compact support, for G linear. The proof, which uses Harish-Chandra¿fs Plancherel formula, rests on a similar result for left and right K-finite functions, which is due to J. Arthur. We give also a proof of Arthur¿fs result, purely in term of representations, involving the work of A. Knapp and E. Stein on intertwining integrals and Langlands and Vogan¿fs classifications of irreducible representations of G
Parameters of leaf-level resource investment and photosynthetic resource-use for R and S families of limber pine.
No full textParameters of leaf-level resource investment and photosynthetic resource-use for R and S families of limber pine.</p
Response of net CO<sub>2</sub> assimilation rate to intercellular CO<sub>2</sub> concentration for R and S families of limber pine.
No full textCurves were taken at a leaf temperature of 25°C, PPFD of 1,800 μmol photons m-2 s-1 and leaf-to-air vapor pressure difference of 1.6 kPa; net CO2 assimilation rate is expressed on a total leaf surface area basis. Statistically significant differences are denoted by an * for P < 0.05.</p
Mean leaf-level gas exchange and resource investment parameters for Inoculation Survivor and Uninoculated populations of limber pine (± SE).
No full textMean leaf-level gas exchange and resource investment parameters for Inoculation Survivor and Uninoculated populations of limber pine (± SE).</p
