scholarly journals Rice plants respond to ammonium stress by adopting a helical root growth pattern

2020 ◽  
Vol 104 (4) ◽  
pp. 1023-1037
Author(s):  
Letian Jia ◽  
Yuanming Xie ◽  
Zhen Wang ◽  
Long Luo ◽  
Chi Zhang ◽  
...  
Keyword(s):  
Root Growth ◽  
Growth Pattern ◽  
Rice Plants ◽  
Ammonium Stress

scholarly journals Gluconacetobacter diazotrophicus Changes The Molecular Mechanisms of Root Development in Oryza sativa L. Growing Under Water Stress

2020 ◽  
Vol 21 (1) ◽  
pp. 333 ◽  
Author(s):  
Renata Silva ◽  
Luanna Filgueiras ◽  
Bruna Santos ◽  
Mariana Coelho ◽  
Maria Silva ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Drought Stress ◽  
Root Growth ◽  
Root Development ◽  
Molecular Mechanisms ◽  
Oryza Sativa L ◽  
Gluconacetobacter Diazotrophicus ◽  
Red Rice ◽  
Bacterial Inoculation ◽  
Rice Plants

Background: Inoculation with Gluconacetobacter diazotrophicus has shown to influence root development in red rice plants, and more recently, the induced systemic tolerance (IST) response to drought was also demonstrated. The goal of this study was to evaluate the inoculation effect of G. diazotrophicus strain Pal5 on the amelioration of drought stress and root development in red rice (Oryza sativa L.). Methods: The experimental treatments consist of red rice plants inoculated with and without strain Pal5 in presence and absence of water restriction. Physiological, biochemical, and molecular analyses of plant roots were carried out, along with measurements of growth and biochemical components. Results: The plants showed a positive response to the bacterial inoculation, with root growth promotion and induction of tolerance to drought. An increase in the root area and higher levels of osmoprotectant solutes were observed in roots. Bacterial inoculation increased the drought tolerance and positively regulated certain root development genes against the water deficit in plants. Conclusion: G. diazotrophicus Pal5 strain inoculation favored red rice plants by promoting various root growth and developmental mechanisms against drought stress, enabling root development and improving biochemical composition.

Effect of Environment and Heredity on the Root-Growth Pattern of Red Pine

Ecology ◽  
1968 ◽  
Vol 49 (1) ◽  
pp. 34-40 ◽  
Author(s):  
Clair Merritt
Keyword(s):  
Root Growth ◽  
Growth Pattern ◽  
Red Pine

Auxin-modulated root growth inhibition in Arabidopsis thaliana seedlings with ammonium as the sole nitrogen source

2015 ◽  
Vol 42 (3) ◽  
pp. 239 ◽  
Author(s):  
Huaiyu Yang ◽  
Jenny von der Fecht-Bartenbach ◽  
Jiřř Friml ◽  
Jan U. Lohmann ◽  
Benjamin Neuhäuser ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Growth ◽  
Nitrogen Source ◽  
Seedling Survival ◽  
Root Growth Inhibition ◽  
Gus Reporter ◽  
Primary Roots ◽  
Hormone Responses ◽  
Ammonium Stress ◽  
High Concentrations

Ammonium is the major nitrogen source in some plant ecosystems but is toxic at high concentrations, especially when available as the exclusive nitrogen source. Ammonium stress rapidly leads to various metabolic and hormonal imbalances that ultimately inhibit root and shoot growth in many plant species, including Arabidopsis thaliana (L.) Heynh. To identify molecular and genetic factors involved in seedling survival with prolonged exclusive NH4+ nutrition, a transcriptomic analysis with microarrays was used. Substantial transcriptional differences were most pronounced in (NH4)2SO4-grown seedlings, compared with plants grown on KNO3 or NH4NO3. Consistent with previous physiological analyses, major differences in the expression modules of photosynthesis-related genes, an altered mitochondrial metabolism, differential expression of the primary NH4+ assimilation, alteration of transporter gene expression and crucial changes in cell wall biosynthesis were found. A major difference in plant hormone responses, particularly of auxin but not cytokinin, was striking. The activity of the DR5::GUS reporter revealed a dramatically decreased auxin response in (NH4)2SO4-grown primary roots. The impaired root growth on (NH4)2SO4 was partially rescued by exogenous auxin or in specific mutants in the auxin pathway. The data suggest that NH4+-induced nutritional and metabolic imbalances can be partially overcome by elevated auxin levels.

scholarly journals Higher Ammonium Transamination Capacity Can Alleviate Glutamate Inhibition on Winter Wheat (Triticum aestivum L.) Root Growth under High Ammonium Stress

PLoS ONE ◽  
2016 ◽  
Vol 11 (8) ◽  
pp. e0160997 ◽  
Author(s):  
Feng Wang ◽  
Jingwen Gao ◽  
Yang Liu ◽  
Zhongwei Tian ◽  
Abid Muhammad ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Root Growth ◽  
Triticum Aestivum L ◽  
Ammonium Stress

Development of micropillar device for characterizing root growth pattern

2016 ◽  
Vol 2016 (0) ◽  
pp. J2230102
Author(s):  
Dai NISHIWAKI ◽  
Hirotaka HIDA ◽  
Tetsuya HIGASHIYAMA ◽  
Michitaka NOTAGUCHI ◽  
Isaku KANNO
Keyword(s):  
Root Growth ◽  
Growth Pattern

Root Growth-promoting Activity of Unsaturated Oligomeric Uronates from Alginate on Carrot and Rice Plants

2003 ◽  
Vol 67 (9) ◽  
pp. 2022-2025 ◽  
Author(s):  
Xu XU ◽  
Yoshiko IWAMOTO ◽  
Yoshie KITAMURA ◽  
Tatsuya ODA ◽  
Tsuyoshi MURAMATSU
Keyword(s):  
Root Growth ◽  
Rice Plants ◽  
Growth Promoting
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