scholarly journals The POLARIS Peptide of Arabidopsis Regulates Auxin Transport and Root Growth via Effects on Ethylene Signaling

2006 ◽  
Vol 18 (11) ◽  
pp. 3058-3072 ◽  
Author(s):  
Paul M. Chilley ◽  
Stuart A. Casson ◽  
Petr Tarkowski ◽  
Nathan Hawkins ◽  
Kevin L.-C. Wang ◽  
...  
Keyword(s):  
Root Growth ◽  
Auxin Transport ◽  
Ethylene Signaling

scholarly journals Arabidopsis HB52 mediates the crosstalk between ethylene and auxin signaling pathways by regulating PIN2, WAG1, and WAG2 during primary root elongation

2018 ◽  
Author(s):  
Zi-Qing Miao ◽  
Ping-Xia Zhao ◽  
Jie-Li Mao ◽  
Lin-Hui Yu ◽  
Yang Yuan ◽  
...  
Keyword(s):  
Root Growth ◽  
Signaling Pathways ◽  
Molecular Mechanism ◽  
Root Elongation ◽  
Auxin Transport ◽  
Primary Root ◽  
Auxin Signaling ◽  
Elongation Zone ◽  
Ethylene Signaling ◽  
Physiological Processes

AbstractThe gaseous hormone ethylene participates in many physiological processes of plants. It is well known that ethylene-inhibited root elongation involves basipetal auxin delivery requiring PIN2. However, the molecular mechanism how ethylene regulates PIN2 is not well understood. Here, we report that the ethylene-responsive HD-Zip gene HB52 is involved in ethylene-mediated inhibition of primary root elongation. Using biochemical and genetic analyses, we demonstrated that HB52 is ethylene-responsive and acts immediately downstream of EIN3. HB52 knock-down mutants are insensitive to ethylene in primary root elongation while the overexpression lines have dramatically shortened roots like ethylene treated plants. Moreover, HB52 upregulates PIN2, WAG1, and WAG2 by directly binding to their promoter, leading to an enhanced basipetal auxin delivery to the elongation zone and thus inhibiting root growth. Our work uncovers HB52 as an important crosstalk node between ethylene signaling and auxin transport in root elongation.

scholarly journals Sound Waves Promote Arabidopsis thaliana Root Growth by Regulating Root Phytohormone Content

2021 ◽  
Vol 22 (11) ◽  
pp. 5739
Author(s):  
Joo Yeol Kim ◽  
Hyo-Jun Lee ◽  
Jin A Kim ◽  
Mi-Jeong Jeong
Keyword(s):  
Arabidopsis Thaliana ◽  
Cell Division ◽  
Root Growth ◽  
Apical Meristem ◽  
Cell Number ◽  
Root Apical Meristem ◽  
Control Group ◽  
Auxin Signaling ◽  
Ethylene Signaling ◽  
Sound Waves

Sound waves affect plants at the biochemical, physical, and genetic levels. However, the mechanisms by which plants respond to sound waves are largely unknown. Therefore, the aim of this study was to examine the effect of sound waves on Arabidopsis thaliana growth. The results of the study showed that Arabidopsis seeds exposed to sound waves (100 and 100 + 9k Hz) for 15 h per day for 3 day had significantly longer root growth than that in the control group. The root length and cell number in the root apical meristem were significantly affected by sound waves. Furthermore, genes involved in cell division were upregulated in seedlings exposed to sound waves. Root development was affected by the concentration and activity of some phytohormones, including cytokinin and auxin. Analysis of the expression levels of genes regulating cytokinin and auxin biosynthesis and signaling showed that cytokinin and ethylene signaling genes were downregulated, while auxin signaling and biosynthesis genes were upregulated in Arabidopsis exposed to sound waves. Additionally, the cytokinin and auxin concentrations of the roots of Arabidopsis plants increased and decreased, respectively, after exposure to sound waves. Our findings suggest that sound waves are potential agricultural tools for improving crop growth performance.

scholarly journals AUXIN UP-REGULATED F-BOX PROTEIN1 Regulates the Cross Talk between Auxin Transport and Cytokinin Signaling during Plant Root Growth

2011 ◽  
Vol 156 (4) ◽  
pp. 1878-1893 ◽  
Author(s):  
Xiaohua Zheng ◽  
Nathan D. Miller ◽  
Daniel R. Lewis ◽  
Matthew J. Christians ◽  
Kwang-Hee Lee ◽  
...  
Keyword(s):  
Root Growth ◽  
Cross Talk ◽  
Auxin Transport ◽  
Plant Root ◽  
Cytokinin Signaling ◽  
The Cross
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