خيارات البحث
النتائج 1 - 8 من 8
Response of abscisic acid in soybean leaves to NO2 exposure
1990
Sandhu, R. | Gupta, G. | Mulchi, C. (University of Maryland Eastern Shore, Princess Anne, MD 21853 (USA))
Stress physiological investigations of Norway spruce at a stand in northern Germany
1992
Lalk, I. (Hamburg Univ. (Germany). Inst. fuer Allgemeine Botanik und Botanischer Garten) | Naumann, R. | Ludewig, M. | Fenner, R. | Doerffling, K.
Molecular marker technology to study the role of abscisic acid
1995
Quarrie, S.A. | Steed, A. | Semikhodsky, A. (John Innes Centre, Norwich (United Kingdom)) | Pekic, S. (Belgrade Univ. (Yugoslavia). Agriculture Fac.) | Lazic-Jancic, V. (Maize Research Inst., Belgrade-Zemun (Yugoslavia)) | Calestani, C. (Bologna Univ. (Italy). Agronomy Dept.) | Tuberosa, R. (Parma Univ. (Italy). Biology Dept.)
With the development of molecular marker technologies to construct detailed molecular maps of crop species it has become possible to study much more precisely than before the possible roles of ABA by analysing the distribution of quantitative trait lici (QTL). This has been done with mapping populations of maize and wheat to study the importance of endogenous ABA in determining stomatal function, water-use efficiency and root growth in plants growing under water-stressed conditions. An F2 population of maize was mapped with 100 RFLP markers and F2 plants and their F3 progenies sampled for leaf and xylem ABA contents and stomatal conductance. Correlations using genotype mean data at QTL significant for ABA content showed that stomatal conductance was more likely to be regulated by xylem ABA content than leaf ABA content. The same maize F3 population was used to identify QTL for root growth was positively associated with root ABA content. Water-use efficiency, measured as 13C discrimination, was measured in a mapping population of doubled haploid lines of wheat. Leaf ABA concentrations were also measured. Comparison of QTL for the two traits showed that leaf ABA concentrations were unlikely to have had an effect on plant water-use efficiency in those field conditions. QTL analysis is a very powerful technique for testing the likely roles of endogenous ABA.
اظهر المزيد [+] اقل [-]The role of plant hormones as modifiers of sensitivity to air pollutants and other stresses
1995
Lucas, P.W. | Wolfended, J. (Lancaster Univ., (United Kingdom). Institute of Environmental and Biological Sciences)
Plant hormones play a major role in the development and control of a wide range of plant physiological processes. Here we examine the ways in which they may influence the response of plants to air pollutants both indirectly, for example through the control of stomatal behaviour by ABA and directly, through their reactions with oxidising pollutants, which can lead to the formation of further damaging molecular species.
اظهر المزيد [+] اقل [-][Studies on physiological indicators for the evaluation of the amount of damage to Norway spruce]
1988
Naumann, R. (Hamburg Univ. (Germany, F.R.). Inst. fuer Allgemeine Botanik) | Ludewig, M. | Fenner, R. | Lalk, I. | Bigdon, M. | Doerffling, K.
Assessing the vitality of beech stands under the impact of various air pollution load in the Beskids [Czech Republic]
1995
Penaz, J. | Martinek, J. (Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Lesnicka a Drevarska Fakulta)
Changes of plant hormone levels in conifers subjected to immissions
1990
Frenzel, B. (Hohenheim Univ. (Germany, F.R.). Inst. fuer Botanik) | Christmann, A.
Investigations on the hormone-balance of healthy and damaged conifers
1986
Frenzel, B. (Hohenheim Univ., Stutgart (Germany, F.R.). Botanisches Inst.) | Christmann, A.
