scholarly journals Effects of AOX1a Deficiency on Plant Growth, Gene Expression of Respiratory Components and Metabolic Profile Under Low-Nitrogen Stress in Arabidopsis thaliana

2010 ◽  
Vol 51 (5) ◽  
pp. 810-822 ◽  
Author(s):  
Chihiro K. Watanabe ◽  
Takushi Hachiya ◽  
Kentaro Takahara ◽  
Maki Kawai-Yamada ◽  
Hirofumi Uchimiya ◽  
...  
Keyword(s):  
Gene Expression ◽  
Arabidopsis Thaliana ◽  
Plant Growth ◽  
Metabolic Profile ◽  
Nitrogen Stress ◽  
Low Nitrogen Stress ◽  
Low Nitrogen

scholarly journals Expression Analysis of Nitrogen Metabolism-Related Genes Reveals Differences in Adaptation to Low-Nitrogen Stress between Two Different Barley Cultivars at Seedling Stage

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Zhiwei Chen ◽  
Chenghong Liu ◽  
Yifei Wang ◽  
Ting He ◽  
Runhong Gao ◽  
...  
Keyword(s):  
Gene Expression ◽  
Nitrogen Metabolism ◽  
Expression Analysis ◽  
Nitrogen Fertilizers ◽  
Nitrogen Stress ◽  
Environmental Damage ◽  
Barley Cultivars ◽  
Low Nitrogen Stress ◽  
Low Nitrogen Tolerance ◽  
Low Nitrogen

The excess use of nitrogen fertilizers causes many problems, including higher costs of crop production, lower nitrogen use efficiency, and environmental damage. Crop breeding for low-nitrogen tolerance, especially molecular breeding, has become the major route to solving these issues. Therefore, in crops such as barley (Hordeum vulgare L.), it is crucial to understand the mechanisms of low-nitrogen tolerance at the molecule level. In the present study, two barley cultivars, BI-04 (tolerant to low nitrogen) and BI-45 (sensitive to low nitrogen), were used for gene expression analysis under low-nitrogen stress, including 10 genes related to primary nitrogen metabolism. The results showed that the expressions of HvNIA2 (nitrite reductase), HvGS2 (chloroplastic glutamine synthetase), and HvGLU2 (ferredoxin-dependent glutamate synthase) were only induced in shoots of BI-04 under low-nitrogen stress, HvGLU2 was also only induced in roots of BI-04, and HvGS2 showed a rapid response to low-nitrogen stress in the roots of BI-04. The expression of HvASN1 (asparagine synthetase) was reduced in both cultivars, but it showed a lower reduction in the shoots of BI-04. In addition, gene expression and regulation differences in the shoots and roots were also compared between the barley cultivars. Taken together, the results indicated that the four above-mentioned genes might play important roles in low-nitrogen tolerance in barley.

scholarly journals Gluconacetobacter diazotrophicus Pal5 Enhances Plant Robustness Status under the Combination of Moderate Drought and Low Nitrogen Stress in Zea mays L.

2021 ◽  
Vol 9 (4) ◽  
pp. 870
Author(s):  
Muhammad Aammar Tufail ◽  
María Touceda-González ◽  
Ilaria Pertot ◽  
Ralf-Udo Ehlers
Keyword(s):  
Zea Mays ◽  
Plant Growth ◽  
Zea Mays L ◽  
Growth Promotion ◽  
Nitrogen Stress ◽  
Rrna Gene ◽  
N Fixation ◽  
Gluconacetobacter Diazotrophicus ◽  
Maize Plants ◽  
Low Nitrogen

Plant growth promoting endophytic bacteria, which can fix nitrogen, plays a vital role in plant growth promotion. Previous authors have evaluated the effect of Gluconacetobacter diazotrophicus Pal5 inoculation on plants subjected to different sources of abiotic stress on an individual basis. The present study aimed to appraise the effect of G. diazotrophicus inoculation on the amelioration of the individual and combined effects of drought and nitrogen stress in maize plants (Zea mays L.). A pot experiment was conducted whereby treatments consisted of maize plants cultivated under drought stress, in soil with a low nitrogen concentration and these two stress sources combined, with and without G. diazotrophicus seed inoculation. The inoculated plants showed increased plant biomass, chlorophyll content, plant nitrogen uptake, and water use efficiency. A general increase in copy numbers of G. diazotrophicus, based on 16S rRNA gene quantification, was detected under combined moderate stress, in addition to an increase in the abundance of genes involved in N fixation (nifH). Endophytic colonization of bacteria was negatively affected by severe stress treatments. Overall, G. diazotrophicus Pal5 can be considered as an effective tool to increase maize crop production under drought conditions with low application of nitrogen fertilizer.

Expression Profiles of 10,422 Genes at Early Stage of Low Nitrogen Stress in Rice Assayed using a cDNA Microarray

2006 ◽  
Vol 60 (5) ◽  
pp. 617-631 ◽  
Author(s):  
Xingming Lian ◽  
Shiping Wang ◽  
Jianwei Zhang ◽  
Qi Feng ◽  
Lida Zhang ◽  
...  
Keyword(s):  
Cdna Microarray ◽  
Early Stage ◽  
Expression Profiles ◽  
Nitrogen Stress ◽  
Low Nitrogen Stress ◽  
Low Nitrogen

Three NPF genes in Arabidopsis are necessary for normal nitrogen cycling under low nitrogen stress

2019 ◽  
Vol 143 ◽  
pp. 1-10 ◽  
Author(s):  
Benjamin A. Babst ◽  
Fei Gao ◽  
Lucia M. Acosta-Gamboa ◽  
Abhijit Karve ◽  
Michael J. Schueller ◽  
...  
Keyword(s):  
Nitrogen Cycling ◽  
Nitrogen Stress ◽  
Low Nitrogen Stress ◽  
Normal Nitrogen ◽  
Low Nitrogen
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