scholarly journals Root hair formation at the root-hypocotyl junction in CPC-LIKE MYB double and triple mutants of Arabidopsis

2015 ◽  
Vol 10 (11) ◽  
pp. e1089372 ◽  
Author(s):  
Takuji Wada ◽  
Naoto Hayashi ◽  
Rumi Tominaga-Wada
2021 ◽  
Vol 12 ◽  
Author(s):  
Yang Liu ◽  
Lu-Lu Yu ◽  
Ye Peng ◽  
Xin-Xin Geng ◽  
Fei Xu

Alternative oxidase (AOX) is the terminal oxidase of the mitochondrial respiratory electron transport chain in plant cells and is critical for the balance of mitochondrial hemostasis. In this study, the effect of inhibition of AOX with different concentrations of salicylhydroxamic acid (SHAM) on the tobacco root development was investigated. We show here that AOX inhibition significantly impaired the development of the main root and root hair formation of tobacco. The length of the main root of SHAM-treated tobacco was significantly shorter than that of the control, and no root hairs were formed after treatment with a concentration of 1 mM SHAM or more. The transcriptome analysis showed that AOX inhibition by 1 mM SHAM involved in the regulation of gene expression related to root architecture. A total of 5,855 differentially expressed genes (DEGs) were obtained by comparing SHAM-treated roots with control. Of these, the gene expression related to auxin biosynthesis and perception were significantly downregulated by 1 mM SHAM. Similarly, genes related to cell wall loosening, cell cycle, and root meristem growth factor 1 (RGF1) also showed downregulation on SHAM treatment. Moreover, combined with the results of physiological measurements, the transcriptome analysis demonstrated that AOX inhibition resulted in excessive accumulation of reactive oxygen species in roots, which further induced oxidative damage and cell apoptosis. It is worth noting that when indoleacetic acid (20 nM) and dimethylthiourea (10 mM) were added to the medium containing SHAM, the defects of tobacco root development were alleviated, but to a limited extent. Together, these findings indicated that AOX-mediated respiratory pathway plays a crucial role in the tobacco root development, including root hair formation.


1986 ◽  
Vol 68 (4) ◽  
pp. 653-656 ◽  
Author(s):  
Francoise Jaunin ◽  
Rose-Marie Hofer

Euphytica ◽  
2007 ◽  
Vol 157 (1-2) ◽  
pp. 95-111 ◽  
Author(s):  
Agnieszka Janiak ◽  
Iwona Szarejko

2010 ◽  
Vol 22 (10) ◽  
pp. 3268-3279 ◽  
Author(s):  
Irene García ◽  
José María Castellano ◽  
Blanca Vioque ◽  
Roberto Solano ◽  
Cecilia Gotor ◽  
...  

1959 ◽  
Vol 37 (1) ◽  
pp. 33-39 ◽  
Author(s):  
R. G. H. Cormack

This paper describes the action of the metal-chelating reagent disodium versenate on the epidermis of living Brassica seedlings. Striking abnormalities were produced, characterized by the repression of root-hair formation and by swelling and deformity of the epidermal cells. The results of the present study are briefly discussed in the light of evidence obtained by use of the electron microscope.


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