scholarly journals Function of abscisic acid in maintenance of maize primary root growth under water deficit

2006 ◽  
Author(s):  
In-jeong Cho
Keyword(s):  
Abscisic Acid ◽  
Root Growth ◽  
Water Deficit ◽  
Primary Root ◽  
Primary Root Growth

Hydrogen peroxide plays an important role in PERK4-mediated abscisic acid-regulated root growth in Arabidopsis

2019 ◽  
Vol 46 (2) ◽  
pp. 165 ◽  
Author(s):  
Xiaonan Ma ◽  
Xiaoran Zhang ◽  
Ling Yang ◽  
Mengmeng Tang ◽  
Kai Wang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Abscisic Acid ◽  
Root Growth ◽  
Primary Root ◽  
Root Tip ◽  
Exogenous Aba ◽  
Ros Accumulation ◽  
Primary Root Growth ◽  
Respiratory Burst Oxidase ◽  
Respiratory Burst Oxidase Homologue

Abscisic acid (ABA) is a crucial factor that affects primary root tip growth in plants. Previous research suggests that reactive oxygen species (ROS), especially hydrogen peroxide, are important regulators of ABA signalling in root growth of Arabidopsis. PROLINE-RICH EXTENSIN-LIKE RECEPTOR KINASE 4 (PERK4) plays an important role in ABA responses. Arabidopsis perk4 mutants display attenuated sensitivity to ABA, especially in primary root growth. To gain insights into the mechanism(s) of PERK4-associated ABA inhibition of root growth, in this study we investigated the involvement of ROS in this process. Normal ROS accumulation in the primary root in response to exogenous ABA treatment was not observed in perk4 mutants. PERK4 deficiency prohibits ABA-induced expression of RESPIRATORY BURST OXIDASE HOMOLOGUE (RBOH) genes, therefore the perk4-1 mutant showed decreased production of ROS in the root. The perk4-1/rbohc double mutant displayed the same phenotype as the perk4 and rbohc single mutants in response to exogenous ABA treatment. The results suggest that PERK4-stimulated ROS accumulation during ABA-regulated primary root growth may be mediated by RBOHC.

scholarly journals Mechanisms for Abscisic Acid Inhibition of Primary Root Growth

2018 ◽  
Vol 13 (9) ◽  
pp. e1500069 ◽  
Author(s):  
Li Rong Sun ◽  
Yi Bin Wang ◽  
Shi Bin He ◽  
Fu Shun Hao
Keyword(s):  
Abscisic Acid ◽  
Root Growth ◽  
Primary Root ◽  
Acid Inhibition ◽  
Primary Root Growth

scholarly journals The Nitrate Transporter MtNPF6.8 (MtNRT1.3) Transports Abscisic Acid and Mediates Nitrate Regulation of Primary Root Growth in Medicago truncatula

2014 ◽  
Vol 166 (4) ◽  
pp. 2152-2165 ◽  
Author(s):  
Anthoni Pellizzaro ◽  
Thibault Clochard ◽  
Caroline Cukier ◽  
Céline Bourdin ◽  
Marjorie Juchaux ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Root Growth ◽  
Medicago Truncatula ◽  
Primary Root ◽  
Nitrate Transporter ◽  
Primary Root Growth

scholarly journals Water-deficit responsive microRNAs in the primary root growth zone of maize

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Candace M. Seeve ◽  
Ramanjulu Sunkar ◽  
Yun Zheng ◽  
Li Liu ◽  
Zhijie Liu ◽  
...  
Keyword(s):  
Root Growth ◽  
Water Deficit ◽  
Stress Responses ◽  
Primary Root ◽  
Growth Zone ◽  
Water Deficit Stress ◽  
Mild Stress ◽  
Nutrient Deficiencies ◽  
Mirna Regulation ◽  
Primary Root Growth

Abstract Background MicroRNA-mediated gene regulatory networks play a significant role in plant growth and development and environmental stress responses. Results We identified 79 microRNAs (miRNAs) and multiple miRNA variants (isomiRs) belonging to 26 miRNA families in the primary root growth zone of maize seedlings grown at one of three water potentials: well-watered (− 0.02 MPa), mild water deficit stress (− 0.3 MPa), and severe water deficit stress (− 1.6 MPa). The abundances of 3 miRNAs (mild stress) and 34 miRNAs representing 17 families (severe stress) were significantly different in water-deficit stressed relative to well-watered controls (FDR < 0.05 and validated by stem loop RT-qPCR). Degradome sequencing revealed 213 miRNA-regulated transcripts and trancriptome profiling revealed that the abundance of 77 (miRNA-regulated) were regulated by water-defecit stress. miR399e,i,j-3p was strongly regulated by water-defcit stress implicating the possibility of nutrient deficiency during stress. Conclusions We have identified a number of maize miRNAs that respond to specific water deficits applied to the primary root growth zone. We have also identified transcripts that are targets for miRNA regulation in the root growth zone under water-deficit stress. The miR399e,i,j-3p that is known to regulate phosphate uptake in response to nutrient deficiencies responds to water-deficit stress, however, at the seedling stage the seed provides adequate nutrients for root growth thus miR399e,i,j-3p may play a separate role in water-deficit responses. A water-deficit regulated maize transcript, similar to known miR399 target mimics, was identified and we hypothesized that it is another regulatory player, moderating the role of miR399e,i,j-3p, in primary root growth zone water deficit responses.

scholarly journals AtrbohD and AtrbohF positively regulate abscisic acid-inhibited primary root growth by affecting Ca2+ signalling and auxin response of roots in Arabidopsis

2013 ◽  
Vol 64 (14) ◽  
pp. 4183-4192 ◽  
Author(s):  
Yiheng Jiao ◽  
Lirong Sun ◽  
Yalin Song ◽  
Limin Wang ◽  
Liping Liu ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Root Growth ◽  
Primary Root ◽  
Auxin Response ◽  
Primary Root Growth

scholarly journals CRISPR/Cas9-targeted mutagenesis of OsERA1 confers enhanced responses to abscisic acid and drought stress and increased primary root growth under nonstressed conditions in rice

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0243376
Author(s):  
Takuya Ogata ◽  
Takuma Ishizaki ◽  
Miki Fujita ◽  
Yasunari Fujita
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Stress Response ◽  
Root Growth ◽  
Primary Root ◽  
Targeted Mutagenesis ◽  
Negative Regulator ◽  
Aba Signaling ◽  
Primary Root Growth ◽  
Mutant Lines

Abscisic acid (ABA) signaling components play an important role in the drought stress response in plants. Arabidopsis thaliana ENHANCED RESPONSE TO ABA1 (ERA1) encodes the β-subunit of farnesyltransferase and regulates ABA signaling and the dehydration response. Therefore, ERA1 is an important candidate gene for enhancing drought tolerance in numerous crops. However, a rice (Oryza sativa) ERA1 homolog has not been characterized previously. Here, we show that rice osera1 mutant lines, harboring CRISPR/Cas9-induced frameshift mutations, exhibit similar leaf growth as control plants but increased primary root growth. The osera1 mutant lines also display increased sensitivity to ABA and an enhanced response to drought stress through stomatal regulation. These results illustrate that OsERA1 is a negative regulator of primary root growth under nonstressed conditions and also of responses to ABA and drought stress in rice. These findings improve our understanding of the role of ABA signaling in the drought stress response in rice and suggest a strategy to genetically improve rice.

scholarly journals Developmental Distribution of the Plasma Membrane-Enriched Proteome in the Maize Primary Root Growth Zone

2013 ◽  
Vol 4 ◽  
Author(s):  
Zhe Zhang ◽  
Priyamvada Voothuluru ◽  
Mineo Yamaguchi ◽  
Robert E. Sharp ◽  
Scott C. Peck
Keyword(s):  
Plasma Membrane ◽  
Root Growth ◽  
Primary Root ◽  
Growth Zone ◽  
Primary Root Growth
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