scholarly journals OsTCP19 influences developmental and abiotic stress signaling by modulatingABI4-mediated pathways

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Pradipto Mukhopadhyay ◽  
Akhilesh Kumar Tyagi
Keyword(s):  
Lateral Root ◽  
Root Formation ◽  
Developmental Pathways ◽  
Stress Signaling ◽  
Oxygen Species ◽  
Lateral Root Formation ◽  
Rice Gene ◽  
Developmental Abnormalities ◽  
Biosynthesis Gene

Abstract Class-I TCP transcription factors are plant-specific developmental regulators. Inthis study, the role of one such rice gene, OsTCP19, in water-deficit andsalt stress response was explored. Besides a general upregulation by abioticstresses, this transcript was more abundant in tolerant than sensitive ricegenotypes during early hours of stress. Stress, tissue and genotype-dependentretention of a small in-frame intron in this transcript was also observed.Overexpression of OsTCP19 in Arabidopsis caused upregulation ofIAA3, ABI3 and ABI4 and downregulation of LOX2, andled to developmental abnormalities like fewer lateral root formation. Moreover,decrease in water loss and reactive oxygen species and hyperaccumulation of lipiddroplets in the transgenics contributed to better stress tolerance both duringseedling establishment and in mature plants. OsTCP19 was also shown to directlyregulate a rice triacylglycerol biosynthesis gene in transient assays. Genes similarto those up- or downregulated in the transgenics were accordingly found to coexpresspositively and negatively with OsTCP19 in Rice Oligonucleotide ArrayDatabase. Interactions of OsTCP19 with OsABI4 and OsULT1 further suggest itsfunction in modulation of abscisic acid pathways and chromatin structure. Thus,OsTCP19 appears to be an important node in cell signaling whichcrosslinks stress and developmental pathways.

scholarly journals To branch or not to branch: the role of pre-patterning in lateral root formation

Development ◽  
2013 ◽  
Vol 140 (21) ◽  
pp. 4301-4310 ◽  
Author(s):  
J. M. Van Norman ◽  
W. Xuan ◽  
T. Beeckman ◽  
P. N. Benfey
Keyword(s):  
Lateral Root ◽  
Root Formation ◽  
Lateral Root Formation

Cobalt chloride-induced lateral root formation in rice: The role of heme oxygenase

2013 ◽  
Vol 170 (12) ◽  
pp. 1075-1081 ◽  
Author(s):  
Yun Yen Hsu ◽  
Yun-Yang Chao ◽  
Ching Huei Kao
Keyword(s):  
Heme Oxygenase ◽  
Lateral Root ◽  
Cobalt Chloride ◽  
Root Formation ◽  
Lateral Root Formation

scholarly journals Nitrate Modulates Lateral Root Formation by Regulating the Auxin Response and Transport in Rice

Genes ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 850
Author(s):  
Bobo Wang ◽  
Xiuli Zhu ◽  
Xiaoli Guo ◽  
Xuejiao Qi ◽  
Fan Feng ◽  
...  
Keyword(s):  
Lateral Root ◽  
Root Formation ◽  
Signalling Pathways ◽  
Lateral Root Formation ◽  
Auxin Response ◽  
Short Term ◽  
Exogenous Auxin ◽  
Mutant Lines ◽  
Auxin Efflux Carrier

Nitrate (NO3-) plays a pivotal role in stimulating lateral root (LR) formation and growth in plants. However, the role of NO3- in modulating rice LR formation and the signalling pathways involved in this process remain unclear. Phenotypic and genetic analyses of rice were used to explore the role of strigolactones (SLs) and auxin in NO3--modulated LR formation in rice. Compared with ammonium (NH4+), NO3- stimulated LR initiation due to higher short-term root IAA levels. However, this stimulation vanished after 7 d, and the LR density was reduced, in parallel with the auxin levels. Application of the exogenous auxin α-naphthylacetic acid to NH4+-treated rice plants promoted LR initiation to levels similar to those under NO3- at 7 d; conversely, the application of the SL analogue GR24 to NH4+-treated rice inhibited LR initiation to levels similar to those under NO3- supply by reducing the root auxin levels at 14 d. D10 and D14 mutations caused loss of sensitivity of the LR formation response to NO3-. The application of NO3- and GR24 downregulated the transcription of PIN-FORMED 2(PIN2), an auxin efflux carrier in roots. LR number and density in pin2 mutant lines were insensitive to NO3- treatment. These results indicate that NO3- modulates LR formation by affecting the auxin response and transport in rice, with the involvement of SLs.

Lateral root formation and nutrients: nitrogen in the spotlight

2021 ◽  
Author(s):  
Pierre-Mathieu Pélissier ◽  
Hans Motte ◽  
Tom Beeckman
Keyword(s):  
Signaling Pathways ◽  
Root System ◽  
Root Development ◽  
Lateral Root ◽  
Molecular Mechanisms ◽  
Root Formation ◽  
Lateral Roots ◽  
Nutrient Use Efficiency ◽  
Lateral Root Formation ◽  
Lateral Root Development

Abstract Lateral roots are important to forage for nutrients due to their ability to increase the uptake area of a root system. Hence, it comes as no surprise that lateral root formation is affected by nutrients or nutrient starvation, and as such contributes to the root system plasticity. Understanding the molecular mechanisms regulating root adaptation dynamics towards nutrient availability is useful to optimize plant nutrient use efficiency. There is at present a profound, though still evolving, knowledge on lateral root pathways. Here, we aimed to review the intersection with nutrient signaling pathways to give an update on the regulation of lateral root development by nutrients, with a particular focus on nitrogen. Remarkably, it is for most nutrients not clear how lateral root formation is controlled. Only for nitrogen, one of the most dominant nutrients in the control of lateral root formation, the crosstalk with multiple key signals determining lateral root development is clearly shown. In this update, we first present a general overview of the current knowledge of how nutrients affect lateral root formation, followed by a deeper discussion on how nitrogen signaling pathways act on different lateral root-mediating mechanisms for which multiple recent studies yield insights.

scholarly journals Involvement of cytokinins in adventitious and lateral root formation

Plant Root ◽  
2007 ◽  
Vol 1 ◽  
pp. 27-33 ◽  
Author(s):  
Takeshi Kuroha ◽  
Shinobu Satoh
Keyword(s):  
Lateral Root ◽  
Root Formation ◽  
Lateral Root Formation

scholarly journals Cross–talk between nitric oxide and Ca2+in elevated CO2-induced lateral root formation

2013 ◽  
Vol 8 (2) ◽  
pp. e23106 ◽  
Author(s):  
Huan Wang ◽  
Yaofang Niu ◽  
Rushan Chai ◽  
Miao Liu ◽  
Yongsong Zhang
Keyword(s):  
Nitric Oxide ◽  
Elevated Co2 ◽  
Cross Talk ◽  
Lateral Root ◽  
Root Formation ◽  
Lateral Root Formation
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