0000000001079228
AUTHOR
Raphaël Lugan
showing 2 related works from this author
Arginase induction represses gall development during clubroot infection in Arabidopsis.
2012
Arginase induction can play a defensive role through the reduction of arginine availability for phytophageous insects. Arginase activity is also induced during gall growth caused by Plasmodiophora brassicae infection in roots of Arabidopsis thaliana; however, its possible role in this context has been unclear. We report here that the mutation of the arginase-encoding gene ARGAH2 abrogates clubroot-induced arginase activity and results in enhanced gall size in infected roots, suggesting that arginase plays a defensive role. Induction of arginase activity in infected roots was impaired in the jar1 mutant, highlighting a link between the arginase response to clubroot and jasmonate signaling. C…
Legume adaptation to sulfur deficiency
2014
BAPSPEEAGEAPSIIPM; Because sulfur-deficiency represents an agronomic issue for crops and notably for the quality of legume products, it is necessary to provide sulfur fertilizers according to crop sulfur needs along with improving sulfur use efficiency. To achieve this goal, increased knowledge of how plants respond to sulfur-deficiency is required. We subjected Medicago truncatula, a model legume species, to sulfur deficiency at different developmental stages and compared yield, nutrient allocation and seed traits. We revealed an impressive plasticity of M. truncatula that varied according to the S-stress period and influenced seed composition and germination. Sulfur deficiency at a mid-ve…