Acibenzolar-S-methyl primes cell wall strengthening genes and reactive oxygen species forming/scavenging enzymes in cucumber after fungal pathogen attack

2006 ◽  
Vol 69 (1-3) ◽  
pp. 52-61 ◽  
Author(s):  
S.A. Deepak ◽  
H. Ishii ◽  
P. Park
Keyword(s):  
Reactive Oxygen Species ◽  
Cell Wall ◽  
Fungal Pathogen ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Pathogen Attack ◽  
Scavenging Enzymes

scholarly journals Cell Wall Damage-Induced Lignin Biosynthesis Is Regulated by a Reactive Oxygen Species- and Jasmonic Acid-Dependent Process in Arabidopsis

2011 ◽  
Vol 156 (3) ◽  
pp. 1364-1374 ◽  
Author(s):  
Lucinda Denness ◽  
Joseph Francis McKenna ◽  
Cecile Segonzac ◽  
Alexandra Wormit ◽  
Priya Madhou ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Cell Wall ◽  
Jasmonic Acid ◽  
Reactive Oxygen ◽  
Lignin Biosynthesis ◽  
Oxygen Species ◽  
Cell Wall Damage ◽  
Dependent Process

C16-Fengycin A affect the growth of Candida albicans by destroying its cell wall and accumulating reactive oxygen species

2019 ◽  
Vol 103 (21-22) ◽  
pp. 8963-8975 ◽  
Author(s):  
Yanan Liu ◽  
Jing Lu ◽  
Jing Sun ◽  
Xiaoyu Zhu ◽  
Libang Zhou ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Cell Wall ◽  
Candida Albicans ◽  
Reactive Oxygen ◽  
Oxygen Species

scholarly journals Non-lethal exposure to H2O2 boosts bacterial survival and evolvability against oxidative stress

2019 ◽  
Author(s):  
Alexandro Rodríguez-Rojas ◽  
Joshua Jay Kim ◽  
Paul Johnston ◽  
Olga Makarova ◽  
Murat Eravci ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Reactive Oxygen Species ◽  
Reactive Oxygen ◽  
Time Lapse ◽  
Oxygen Species ◽  
Bacterial Survival ◽  
Phenotypic Resistance ◽  
Subsequent Exposure ◽  
Scavenging Enzymes ◽  
Multicellular Organisms

AbstractUnicellular organisms have the prevalent challenge to survive under oxidative stress of reactive oxygen species (ROS) such as hydrogen peroxide (H2O2). ROS are present as by-products of photosynthesis and aerobic respiration. These reactive species are even employed by multicellular organisms as potent weapons against microbes. Although bacterial defences against lethal and sub-lethal oxidative stress have been studied in model bacteria, the role of fluctuating H2O2 concentrations remains unexplored. It is known that sub-lethal exposure of Escherichia coli to H2O2 results in enhanced survival upon subsequent exposure. Here we investigate the priming response to H2O2 at physiological concentrations. The basis and the duration of the response (memory) were also determined by time-lapse quantitative proteomics. We found that a low level of H2O2 induced several scavenging enzymes showing a long half-life, subsequently protecting cells from future exposure. We then asked if the phenotypic resistance against H2O2 alters the evolution of resistance against oxygen stress. Experimental evolution of H2O2 resistance revealed faster evolution and higher levels of resistance in primed cells. Several mutations were found to be associated with resistance in evolved populations affecting different loci but, counterintuitively, none of them was directly associated with scavenging systems. Our results have important implications for host colonisation and infections where microbes often encounter reactive oxygen species in gradients.

scholarly journals Reactive oxygen species as important regulators of cell division

2020 ◽  
Author(s):  
Weiliang Qi ◽  
Li Ma ◽  
Fei Wang ◽  
Ping Wang ◽  
Junyan Wu ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Cell Wall ◽  
Cell Division ◽  
Cold Stress ◽  
Reactive Oxygen ◽  
Vascular Bundles ◽  
Oxygen Species ◽  
Root Primordia ◽  
Lateral Root Primordia

AbstractCurrently, the role of reactive oxygen species (ROS) in plant growth is a topic of interest. In this study, we discuss the role of ROS in cell division. We analyzed ROS’ impact on the stiffness of plant cell walls and whether ROS play an important role in Brassica napus’ ability to adapt to cold stress. Cultivated sterile seedlings and calli of cold-tolerant cultivar 16NTS309 were subjected to cold stress at 25°C and 4°C, respectively. Under normal conditions, O2.− mainly accumulated in the leaf edges, shoot apical meristem, leaf primordia, root tips, lateral root primordia, calli of meristematic nodular tissues, cambia, vascular bundles and root primordia, which are characterized by high division rates. After exposure to cold stress, the malondialdehyde and ROS (O2.−) contents in roots, stems and leaves of cultivar 16NTS309 were significantly higher than under non-cold conditions (P < 0.05). ROS (O2.−) were not only distributed in these zones, but also in other cells, at higher levels than under normal conditions. A strong ROS-based staining appeared in the cell wall. The results support a dual role for apoplastic ROS, in which they have direct effects on the stiffness of the cell wall, because ROS cleave cell-wall, and act as wall loosening agents, thereby either promoting or restricting cellular division. This promotes the appearance of new shoots and a strong root system, allowing plants to adapt to cold stress.

scholarly journals Reactive oxygen species signaling and stomatal movement in plant responses to drought stress and pathogen attack

2018 ◽  
Vol 60 (9) ◽  
pp. 805-826 ◽  
Author(s):  
Junsheng Qi ◽  
Chun-Peng Song ◽  
Baoshan Wang ◽  
Jianmin Zhou ◽  
Jaakko Kangasjärvi ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Drought Stress ◽  
Reactive Oxygen ◽  
Plant Responses ◽  
Stomatal Movement ◽  
Oxygen Species ◽  
Pathogen Attack ◽  
Reactive Oxygen Species Signaling
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