scholarly journals WD 40‐ REPEAT 5a represses root meristem growth by suppressing auxin synthesis through changes of nitric oxide accumulation in Arabidopsis

2018 ◽  
Vol 93 (5) ◽  
pp. 883-893 ◽  
Author(s):  
Wen‐Cheng Liu ◽  
Si‐Qiu Zheng ◽  
Zhen‐Dong Yu ◽  
Xiang Gao ◽  
Ran Shen ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Root Meristem ◽  
Auxin Synthesis

scholarly journals Salt Stress Reduces Root Meristem Size by Nitric Oxide-Mediated Modulation of Auxin Accumulation and Signaling in Arabidopsis

2015 ◽  
Vol 168 (1) ◽  
pp. 343-356 ◽  
Author(s):  
Wen Liu ◽  
Rong-Jun Li ◽  
Tong-Tong Han ◽  
Wei Cai ◽  
Zheng-Wei Fu ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Salt Stress ◽  
Root Meristem ◽  
Meristem Size ◽  
Auxin Accumulation

scholarly journals A dynamic pattern of local auxin sources is required for root regeneration

2019 ◽  
Author(s):  
Rotem Matosevich ◽  
Itay Cohen ◽  
Naama Gil-Yarom ◽  
Abelardo Modrego ◽  
Carla Verna ◽  
...  
Keyword(s):  
Stem Cell Niche ◽  
Root Meristem ◽  
Root Regeneration ◽  
Competence Factor ◽  
Continuous Activity ◽  
Rapid Accumulation ◽  
Auxin Synthesis ◽  
Spatio Temporal ◽  
Cell Niche ◽  
Auxin Accumulation

AbstractFollowing removal of its stem cell niche, the root meristem can regenerate by recruitment of remnant cells from the stump. Regeneration is initiated by rapid accumulation of auxin near the injury site but the source of this auxin is unknown. Here, we show that auxin accumulation arises from the activity of multiple auxin biosynthetic sources that are newly specified near the cut site and that their continuous activity is required for the regeneration process. Auxin synthesis is highly localized and PIN-mediate transport is dispensable for auxin accumulation and tip regeneration. Roots lacking the activity of the regeneration competence factor ERF115, or that are dissected at a zone of low-regeneration potential, fail to activate local auxin sources. Remarkably, restoring auxin supply is sufficient to confer regeneration capacity to these recalcitrant tissues. We suggest that regeneration competence relies on the ability to specify new local auxin sources in a precise spatio-temporal pattern.

WDR5a functions in cadmium-inhibited root meristem growth by regulating nitric oxide accumulation in Arabidopsis

Planta ◽  
2020 ◽  
Vol 252 (5) ◽  
Author(s):  
Yu Zhang ◽  
Yang-Yang Tian ◽  
Lin-Feng Wang ◽  
Yun-Hui Li ◽  
Ting-Ting Li ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Root Meristem

scholarly journals Melatonin Regulates Root Meristem by Repressing Auxin Synthesis and Polar Auxin Transport in Arabidopsis

2016 ◽  
Vol 07 ◽  
Author(s):  
Qiannan Wang ◽  
Bang An ◽  
Yunxie Wei ◽  
Russel J. Reiter ◽  
Haitao Shi ◽  
...  
Keyword(s):  
Auxin Transport ◽  
Root Meristem ◽  
Polar Auxin Transport ◽  
Auxin Synthesis

Ultrastructural Changes in the Root Meristem Cells of Rubus Chamaemorus L. (Cloudberry)

1975 ◽  
Vol 33 ◽  
pp. 562-563
Author(s):  
Arya K. Bal
Keyword(s):  
Root Meristem ◽  
Uranyl Acetate ◽  
Particulate Material ◽  
Ultrastructural Changes ◽  
Cell Organelles ◽  
Cytoplasmic Matrix ◽  
Golgi Membranes ◽  
Rubus Chamaemorus ◽  
Dense Substance ◽  
Ultrathin Sections

In the course of studies in the root meristem tissue of Rubus chamaemorus L. some important changes in the ultrastructural morphology were observed during the initiation of senescence at the end of the growing season.Root meristems were collected from naturally growing healthy populations of Cloudberry plants, and fixed in Karnovsky's mixture or in 2.5% glutaraldehyde in phosphate buffer. The samples were osmicated, dehydrated following usual methods and embedded in Epon. Ultrathin sections were stained in uranyl acetate and lead citrate.Figure 1 shows part of a dense cell in the meristem. The electron density of these cells is due to large amounts of a particulate material in the cytoplasmic matrix. The smallest particle seen in electron micrographs is about 40 A, although larger aggregates are also found, which remain randomly distributed in association with various cell organelles. Dense substance has been found associated with golgi membranes, proplastids, vacuoles and microtubules (Fig. 2).

Localization of endothelial nitric oxide synthase in the normal and failing human atrial myocardium

1996 ◽  
Vol 54 ◽  
pp. 786-787
Author(s):  
Chi-Ming Wei ◽  
Margarita Bracamonte ◽  
Shi-Wen Jiang ◽  
Richard C. Daly ◽  
Christopher G.A. McGregor ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Heart Failure ◽  
Nitric Oxide Synthase ◽  
Endothelial Nitric Oxide Synthase ◽  
Cardiac Tissues ◽  
Mammalian Tissues ◽  
End Stage Heart Failure ◽  
End Stage ◽  
Oxide Synthase ◽  
Endothelial Nitric Oxide

Nitric oxide (NO) is a potent endothelium-derived relaxing factor which also may modulate cardiomyocyte inotropism and growth via increasing cGMP. While endothelial nitric oxide synthase (eNOS) isoforms have been detected in non-human mammalian tissues, expression and localization of eNOS in the normal and failing human myocardium are poorly defined. Therefore, the present study was designed to investigate eNOS in human cardiac tissues in the presence and absence of congestive heart failure (CHF).Normal and failing atrial tissue were obtained from six cardiac donors and six end-stage heart failure patients undergoing primary cardiac transplantation. ENOS protein expression and localization was investigated utilizing Western blot analysis and immunohistochemical staining with the polyclonal rabbit antibody to eNOS (Transduction Laboratories, Lexington, Kentucky).

Nitric Oxide Reduces Pressor Responsiveness During Ovine Hypoadrenocorticism

2001 ◽  
Vol 28 (5-6) ◽  
pp. 459-462
Author(s):  
Pini Orbach ◽  
Charles E Wood ◽  
Maureen Keller-Wood
Keyword(s):  
Nitric Oxide
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