Search results for "N2 fixation"
showing 7 items of 7 documents
Study of the adaptative response of N2 fixation to a root pruning in peas using environmental and genetic variations
2013
International audience; Pea is the first grain legume grown in Europe for its seeds rich in protein. As a legume, it has the ability to fix atmospheric N2 by the symbiosis with Rhyzobium bacteria. Still, N nutrition can be a limiting factor of pea yield, due to a high sensitivity of symbiotic N2 fixation to biotic stress like Aphanomyces that leads to root rots. The consequences of root damage on nodules and their N2 fixing activity and the possible adaptive response of plants still remain unknown. Root pruning could be an innovative experimental way to study these effects, resulting both in nodules and N2 deprivation. Still, researches described the adaptive responses of plants to a local …
ChemInform Abstract: New Developments in Nitrogen Fixation.
2010
The production of ammonia from atmospheric dinitrogen at room temperature and ambient pressure in analogy to nature is a long-term goal for coordination chemists. Novel reactions of N2 -containing transition metal complexes with H2 , the first side-on N2 -bridged structure of an actinide complex, and an interesting variation of synthetic N2 fixation are the key points addressed in this contribution. The results are related to the known chemistry of N2 complexes, and their significance is discussed with respect to enzymatic N2 fixation.
Quantification of nitrogen fluxes and explanatory plant traits during a two year legume-cereal rotation
2018
National audience; A better understanding of how plant growth, N nutrition and symbiotic nitrogen fixation (SNF) are influenced by soil inorganic N availability, for a wide range of legume species, is crucial to optimise legume productivity, N2 fixation, while limiting environmental risks such as N leaching. A comparative analysis was performed for ten legume crops, grown in a field experiment and supplied with four levels of N fertiliser. Dry matter, N concentration and SNF were measured. Parallely, root traits were studied in a greenhouse experiment. For most species, inorganic N inputs had little effect on plant growth and N nutrition. SNF was negatively affected by soil inorganic N avai…
Inhibition and recovery of symbiotic N2 fixation by peas (Pisum sativum L.) in response to short term nitrate exposure
2014
International audience; Cereal-legume intercrops are a promising way to combine high productivity and several ecological benefits in temperate agro-ecosystems. However the proportion of each species in the mixture at harvest is highly variable. N-fertilisation may be a mean for controlling these proportions (Naudin et al., 2010). Symbiotic N2 fixation (SNF) can be inhibited by nitrate exposure. Although the effect of nitrate on SNF has been extensively investigated different scales, few studies have highlighted the impact of different timings of nitrate exposure on the SNF apparatus (N2 fixation rate and nodule biomass) and on its ability to recover after nitrates removal. The aim of this s…
Isotopic fractionation due to N2 fixation in various grain legumes
2004
National audience
Agro-ecological benefits of faba bean for rainfed Mediterranean cropping systems
2017
This paper reviews the main results from a set of experiments carried out in a semiarid Mediterranean environment during the past 25 years on faba bean (<em>Vicia faba</em> L.), a crop traditionally grown in southern Italy and Sicily under rainfed conditions. These experiments focused on the residual effects of faba bean on subsequent crop(s) and assessment of the nitrogen (N) balance during the crop cycle, paying attention to both the environmental release of N (losses via volatilisation and denitrification) and estimates of N2 fixation as influenced by tillage system, intercropping, and presence/absence of mycorrhizal inoculum. Faba bean relied on N2 fixation more than other g…
Comparative effect of inorganic N on plant growth and N2 fixation of ten legume crops
2018
International audience; [pas de résumé]