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Divergent Evolution of Plant NBS-LRR Resistance Gene Homologues in Dicot and Cereal Genomes
The results suggest that the two main groups of resistance genes underwent divergent evolution in cereal and dicot genomes and imply that their cognate signaling pathways have diverged as well.
Superoxide production by plant homologues of the gp91(phox) NADPH oxidase. Modulation of activity by calcium and by tobacco mosaic virus infection.
In contrast to the mammalian gp91(phox), the plant homolog can produce O(2)(-) in the absence of additional cytosolic components and is stimulated directly by Ca(2+), indicating that the formazan precipitates were due to reduction by O( 2)(-) radicals catalyzed by an NADPH-dependent flavin containing enzyme.
Two Distinct Sources of Elicited Reactive Oxygen Species in Tobacco Epidermal Cells.
The physiological relevance of ROS-generated signals was indicated by the rapid alteration of the epidermal cell glutathione pool and the cellular redox state, and induction of ROS by all elicitors was correlated with subsequent cell death.
Production of Reactive Oxygen Species by Plant NADPH Oxidases1
NADPH oxidases catalyze the production of superoxides, a type of reactive oxygen species (ROS), and their role in promoting pathogen killing has long motivated research in this area.
Comparative genetics of nucleotide binding site-leucine rich repeat resistance gene homologues in the genomes of two dicotyledons: tomato and arabidopsis.
The data indicate remarkably rapid evolution of R-gene homologues during diversification of plant families and the existence of a null allele within Lycopersicon.
A critical role for ureides in dark and senescence-induced purine remobilization is unmasked in the Atxdh1 Arabidopsis mutant.
- G. Brychkova, Z. Alikulov, R. Fluhr, M. Sagi
- Environmental ScienceThe Plant journal : for cell and molecular…
- 1 May 2008
The regulation of ureide levels by Atxdh1 has general implications for optimal plant survival during nutrient remobilization, such as occurs during normal growth, dark stress and senescence, and point to the dual functionality of Ureides as efficient stores of nitrogen and as cellular protectants.
The role of calcium and activated oxygens as signals for controlling cross-tolerance.
The I2C family from the wilt disease resistance locus I2 belongs to the nucleotide binding, leucine-rich repeat superfamily of plant resistance genes.
Members of a new multigene family, complex I2C, were isolated by map-based cloning from the I2 F. o.
Update on Production of Reactive Oxygen Species by Rboh Production of Reactive Oxygen Species by Plant NADPH Oxidases
This Update will focus on recent advances in the understanding of intrinsic molecular properties of Rboh as they are related to their function in plants.
Plant Respiratory Burst Oxidase Homologs Impinge on Wound Responsiveness and Development in Lycopersicon esculentum Online version contains Web-only data.
The results provide novel insights into how the steady state cellular level of ROS is controlled and portrays the role of Rboh as a signal transducer of stress and developmental responses.