Impact of the Genetic–Environment Interaction on the Dynamic of Nitrogen Pools in Arabidopsis

Abstract

Abstract:Mineral nutrient availability and in particular nitrogen abundance has a huge impact on plant fitness and yield, so that plants have developed sophisticated adaptive mechanisms to cope with environmental fluctuations. The vast natural variation existing among the individuals of a single species constitutes a great potential to decipher complex traits such as nutrient use efficiency. By using natural accessions of Arabidopsis thaliana that differ for their pattern of adaptation to nitrogen stress, we investigated the plant response to nitrate supplies ranging from 0.01 mM up to 50 mM nitrate. The biomass allocation and the different nitrogen pools in shoot and in roots were monitored to establish the nutrition status of each plant. Analysis of variation for these traits revealed genetic differences between accessions for their sensibility to nitrate availability and for their capacity to produce shoot biomass with the same nitrogen nutrition index. From the correlation matrix of all traits measured, a statistical model was formulated to predict the shoot projected area from the nitrate supply. The proposed model points out the importance of genetic variation with respect to the correlation between root thickness and amino acids content in roots. The model provides potential new targets in plant breeding for nitrogen use efficiency.

The Correlation between Soil Nutrient and Potato Quality in Loess Plateau of China Based on PLSR

“…The forms of nitrogen in soil can be divided into inorganic nitrogen and organic nitrogen, and inorganic nitrogen mainly includes ammonium nitrogen and nitrate nitrogen. The main nitrogen sources for plant growth are ammonium nitrogen and nitrate nitrogen, but the uptake of the two forms of nitrogen by different crops is different under the influence of genetic factors and external conditions [64]. The effect of different forms of nitrogen on potato is complicated, and the mechanism of its effect on potato is not clear.…”

Variations in Nitrogen Metabolism are Closely Linked with Nitrogen Uptake and Utilization Efficiency in Cotton Genotypes under Various Nitrogen Supplies

“…The intraspecific variation in the genotypes belongs to the same species are the valuable resources for breeding the desirable traits for further improvement [11]. The use of crop genotypes to select the ideal form with desirable traits is an effective approach in order to attain high NUE [12]. Significant progress has been made in Arabidopsis, and different accessions have been used for exploiting natural variations in N uptake, utilization, and NUE in response to various N supply [12,13].…”

“…The use of crop genotypes to select the ideal form with desirable traits is an effective approach in order to attain high NUE [12]. Significant progress has been made in Arabidopsis, and different accessions have been used for exploiting natural variations in N uptake, utilization, and NUE in response to various N supply [12,13]. Moreover, such approaches also have been applied in crop plants such as rice [14], wheat [15], maize [16], rapeseed [17], tomato [18,19], soybean [20], and barley [21].…”

Plant Nutrient Dynamics in Stressful Environments: Needs Interfere with Burdens

“…The elucidation of relevant genes and of genetic potentials are an important basis for breeding crop varieties with improved performance in stressful environments [31][32][33][34][35]. Besides traditional breeding programs, new tools to improve stress responses became available over recent decades, and may allow more direct genetic improvements to be made.…”

“…The research article by Chietera et al [32] is also focused on nitrogen stress, and proposes new breeding targets including morphological and physiological properties. This research article is based on experiments with the hydroponically grown model plant Arabidopsis thaliana.…”