Abscisic acid and nitric oxide modulate cytoskeleton organization, root hair growth and ectopic hair formation in Arabidopsis

Nitric Oxide ◽  
2018 ◽  
Vol 80 ◽  
pp. 89-97 ◽  
Author(s):  
María Cristina Lombardo ◽  
Lorenzo Lamattina
Keyword(s):  
Nitric Oxide ◽  
Abscisic Acid ◽  
Root Hair ◽  
Hair Growth ◽  
Cytoskeleton Organization ◽  
Root Hair Growth ◽  
Hair Formation

scholarly journals Extracellular ATP and nitric oxide signaling pathways regulate redox-dependent responses associated to root hair growth in etiolated Arabidopsis seedlings

2010 ◽  
Vol 5 (6) ◽  
pp. 698-701 ◽  
Author(s):  
María Cecilia Terrile ◽  
Claudia Virginia Tonón ◽  
María José Iglesias ◽  
Lorenzo Lamattina ◽  
Claudia Anahí Casalongué
Keyword(s):  
Nitric Oxide ◽  
Signaling Pathways ◽  
Root Hair ◽  
Hair Growth ◽  
Extracellular Atp ◽  
Nitric Oxide Signaling ◽  
Root Hair Growth

scholarly journals GTL1 is required for a robust root hair growth response to avoid nutrient overloading

2021 ◽  
Author(s):  
Michitaro Shibata ◽  
David S Favero ◽  
Ryu Takebayashi ◽  
Ayako Kawamura ◽  
Bart Rymen ◽  
...  
Keyword(s):  
Nutrient Availability ◽  
Root Hair ◽  
Hair Growth ◽  
Root Hairs ◽  
The Face ◽  
Hand Defects ◽  
Positive Regulators ◽  
Root Hair Formation ◽  
Root Hair Growth ◽  
Hair Formation

Root hair growth is tuned in response to the environment surrounding plants. While most of previous studies focused on the enhancement of root hair growth during nutrient starvation, few studies investigated the root hair response in the presence of excess nutrients. We report that the post-embryonic growth of wild-type Arabidopsis plants is strongly suppressed with increasing nutrient availability, particularly in the case of root hair growth. We further used gene expression profiling to analyze how excess nutrient availability affects root hair growth, and found that RHD6 subfamily genes, which are positive regulators of root hair growth, are down-regulated in this condition. On the other hand, defects in GTL1 and DF1, which are negative regulators of root hair growth, cause frail and swollen root hairs to form when excess nutrients are supplied. Additionally, we observed that the RHD6 subfamily genes are mis-expressed in gtl1-1 df1-1. Furthermore, overexpression of RSL4, an RHD6 subfamily gene, induces swollen root hairs in the face of a nutrient overload, while mutation of RSL4 in gtl1-1 df1-1 restore root hair swelling phenotype. In conclusion, our data suggest that GTL1 and DF1 prevent unnecessary root hair formation by repressing RSL4 under excess nutrient conditions.

scholarly journals Multi-Walled Carbon Nanotubes Can Promote Brassica napus L. and Arabidopsis thaliana L. Root Hair Development through Nitric Oxide and Ethylene Pathways

2020 ◽  
Vol 21 (23) ◽  
pp. 9109
Author(s):  
Gan Zhao ◽  
Yingying Zhao ◽  
Wang Lou ◽  
Dyaaaldin Abdalmegeed ◽  
Rongzhan Guan ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Carbon Nanotubes ◽  
Root Hair ◽  
Hair Growth ◽  
Root Hair Development ◽  
Multi Walled Carbon Nanotubes ◽  
Root Hair Growth ◽  
Hair Development ◽  
Walled Carbon Nanotubes ◽  
Hair Morphogenesis

Here, we report that multi-walled carbon nanotubes (MWCNTs) can promote plant root hair growth in the species analyzed in this study; however, low and excessive concentrations of MWCNTs had no significant effect or even an inhibiting influence. Further results show that MWCNTs can enter rapeseed root cells. Meanwhile, nitrate reductase (NR)-dependent nitric oxide (NO) and ethylene syntheses, as well as root hair formation, were significantly stimulated by MWCNTs. Transcription of root hair growth-related genes were also modulated. The above responses were sensitive to the removal of endogenous NO or ethylene with a scavenger of NO or NO/ethylene synthesis inhibitors. Pharmacological and molecular evidence suggested that ethylene might act downstream of NR-dependent NO in MWCNTs-induced root hair morphogenesis. Genetic evidence in Arabidopsis further revealed that MWCNTs-triggered root hair growth was abolished in ethylene-insensitive mutants ein2-5 and ein3-1, and NR mutant nia1/2, but not in noa1 mutant. Further data placed NO synthesis linearly before ethylene production in root hair development triggered by MWCNTs. The above findings thus provide some insights into the molecular mechanism underlying MWCNTs control of root hair morphogenesis.

scholarly journals Multi-Walled Carbon Nanotubes can Promote Root Hair Development Through Nitric Oxide and Ethylene Pathways

2020 ◽  
Author(s):  
Gan Zhao ◽  
Yingying Zhao ◽  
Wang Lou ◽  
Dyaaaldin Abdalmegeed ◽  
Rongzhan Guan ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Carbon Nanotubes ◽  
Root Hair ◽  
Hair Growth ◽  
Plant Root ◽  
Molecular Data ◽  
Root Cells ◽  
Root Hair Development ◽  
Root Hair Growth ◽  
Hair Development

Abstract Background: Although carbon nanotubes (CNTs) have the risk of polluting the ecological system, it still cannot deny its huge potential in agriculture. Studying the effects of CNTs on plant growth will help to make new assessments of the application of CNTs in agriculture. Results: Here, we observed that the stimulation of plant root hair growth triggered by multi-walled carbon nanotube (MWCNTs) with appropriate concentrations is a universal event; however, low or excessive had no significant effect or even inhibition. Further results showed that MWCNTs could enter rapeseed root cells. Meanwhile, nitrate reductase (NR)-dependent nitric oxide (NO) and ethylene syntheses, as well as root hair formation were significantly stimulated by MWCNTs. Transcription of root hair growth related genes were also modulated. Above responses were obviously blocked by the removal of endogenous NO and ethylene with a scavenger of NO or NO/ethylene synthetic inhibitors. Similarly, MWCNTs-triggered root hair growth was obviously impaired in ein2-5 and ein3-1, two ethylene-insensitive mutants, and nia1/2, a nitric reductase defective mutant, but not in noa1 mutant, with impaired in NO-associated protein 1. Further molecular data placed NR-dependent NO synthesis linearly before ethylene production in root hair development triggered by MWCNTs.Conclusion: Above results revealed that MWCNTs could promote root hair growth. Ethylene and NR-dependent NO were required for MWCNTs-induced root hair morphogenesis via regulating genes related to root hair development, and ethylene might act downstream of NO in this process. Since root hair is one of important components for root organogenesis, above findings open a new window for the possible usage of CNTs in agriculture.

scholarly journals The TOR–Auxin Connection Upstream of Root Hair Growth

Plants ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 150 ◽  
Author(s):  
Katarzyna Retzer ◽  
Wolfram Weckwerth
Keyword(s):  
Cell Fate ◽  
Root Hair ◽  
Hair Growth ◽  
Environmental Changes ◽  
Growth Control ◽  
Root Hairs ◽  
Signaling Cascades ◽  
Continuous Growth ◽  
Root Hair Cell ◽  
Root Hair Growth

Plant growth and productivity are orchestrated by a network of signaling cascades involved in balancing responses to perceived environmental changes with resource availability. Vascular plants are divided into the shoot, an aboveground organ where sugar is synthesized, and the underground located root. Continuous growth requires the generation of energy in the form of carbohydrates in the leaves upon photosynthesis and uptake of nutrients and water through root hairs. Root hair outgrowth depends on the overall condition of the plant and its energy level must be high enough to maintain root growth. TARGET OF RAPAMYCIN (TOR)-mediated signaling cascades serve as a hub to evaluate which resources are needed to respond to external stimuli and which are available to maintain proper plant adaptation. Root hair growth further requires appropriate distribution of the phytohormone auxin, which primes root hair cell fate and triggers root hair elongation. Auxin is transported in an active, directed manner by a plasma membrane located carrier. The auxin efflux carrier PIN-FORMED 2 is necessary to transport auxin to root hair cells, followed by subcellular rearrangements involved in root hair outgrowth. This review presents an overview of events upstream and downstream of PIN2 action, which are involved in root hair growth control.

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