scholarly journals Beneficial Effects of Exogenous Melatonin on Overcoming Salt Stress in Sugar Beets (Beta vulgaris L.)

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 886
Author(s):  
Pengfei Zhang ◽  
Lei Liu ◽  
Xin Wang ◽  
Ziyang Wang ◽  
He Zhang ◽  
...  
Keyword(s):  
Salt Stress ◽  
Antioxidant Defense ◽  
Sugar Content ◽  
Soluble Sugar ◽  
Membrane Integrity ◽  
Antioxidant Defense System ◽  
Defense System ◽  
Sugar Beets ◽  
Ps Ii ◽  
Positive Effects

Melatonin has been regarded as a promising substance that enhances the abiotic stress tolerance of plants. However, few studies have devoted attention to the role of melatonin in improving salt tolerance in sugar beets. Here, the effects of different application methods (foliar application (100 μM), root application (100 μM), and combined foliar and root application) of melatonin on the morphological and physiological traits of sugar beets exposed to salt stress were investigated. The results showed that melatonin improved the growth of sugar beet seedlings, root yield and sugar content, synthesis of chlorophyll, photosystem II (PS II) activity, and gas exchange parameters under salt stress conditions. Moreover, melatonin enhanced the capacity of osmotic adjustment by increasing the accumulation of osmolytes (betaine, proline, and soluble sugar). At the same time, melatonin increased the H+-pump activities in the roots, thus promoting Na+ efflux and K+ influx, which maintained K+/Na+ homeostasis and mitigated Na+ toxicity. In addition, melatonin strengthened the antioxidant defense system by enhancing the activities of antioxidant enzymes, modulating the ASA-GSH cycle, and mediating the phenylalanine pathway, which removed superoxide anions (O2•−) and hydrogen peroxide (H2O2) and maintained cell membrane integrity. These positive effects were more pronounced when melatonin was applied by combined foliar and root application. To summarize, this study clarifies the potential roles of melatonin in mitigating salt stress in sugar beets by improving photosynthesis, water status, ion homeostasis, and the antioxidant defense system.

A rice mutant defective in antioxidant-defense system and sodium homeostasis possesses increased sensitivity to salt stress

2016 ◽  
Vol 60 (1) ◽  
pp. 86-94 ◽  
Author(s):  
K. -C. Lin ◽  
W. -S. Jwo ◽  
N. N. P. Chandrika ◽  
T. -M. Wu ◽  
M. -H. Lai ◽  
...  
Keyword(s):  
Salt Stress ◽  
Antioxidant Defense ◽  
Antioxidant Defense System ◽  
Defense System ◽  
Sodium Homeostasis ◽  
Rice Mutant ◽  
Increased Sensitivity

Magnetopriming regulates antioxidant defense system in soybean against salt stress

2019 ◽  
Vol 18 ◽  
pp. 101090 ◽  
Author(s):  
Sunita Kataria ◽  
Lokesh Baghel ◽  
Meeta Jain ◽  
K.N. Guruprasad
Keyword(s):  
Salt Stress ◽  
Antioxidant Defense ◽  
Antioxidant Defense System ◽  
Defense System

scholarly journals Chitosan-Mediated Salt Stress Mitigation in Rice by Enhancing Antioxidant Defense System

2021 ◽  
pp. 1
Author(s):  
Md Khaleduzzaman ◽  
Mohammad Hossain ◽  
Muhammad Bhuiyan ◽  
Sakil Mahmud ◽  
Md Arif ◽  
...  
Keyword(s):  
Salt Stress ◽  
Antioxidant Defense ◽  
Antioxidant Defense System ◽  
Defense System

scholarly journals Exogenous Arginine Enhances Antioxidant Defense System and Regulates the Physiology of Lentil (Lens culinaris) under Salt Stress

2020 ◽  
Author(s):  
Kamrun Nahar ◽  
Masayuki Fujita ◽  
Mirza Hasanuzzaman ◽  
Mazhar Ul Alam ◽  
Taufika Islam Anee ◽  
...  
Keyword(s):  
Salt Stress ◽  
Lens Culinaris ◽  
Antioxidant Defense ◽  
Antioxidant Defense System ◽  
Defense System

scholarly journals Regulation of Reactive Oxygen Species and Antioxidant Defense in Plants under Salinity

2021 ◽  
Vol 22 (17) ◽  
pp. 9326
Author(s):  
Mirza Hasanuzzaman ◽  
Md. Rakib Hossain Raihan ◽  
Abdul Awal Chowdhury Masud ◽  
Khussboo Rahman ◽  
Farzana Nowroz ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Reactive Oxygen Species ◽  
Salt Stress ◽  
Oxidative Damage ◽  
Antioxidant Defense ◽  
Reactive Oxygen ◽  
Antioxidant Defense System ◽  
Ros Generation ◽  
Oxygen Species ◽  
Defense System

The generation of oxygen radicals and their derivatives, known as reactive oxygen species, (ROS) is a part of the signaling process in higher plants at lower concentrations, but at higher concentrations, those ROS cause oxidative stress. Salinity-induced osmotic stress and ionic stress trigger the overproduction of ROS and, ultimately, result in oxidative damage to cell organelles and membrane components, and at severe levels, they cause cell and plant death. The antioxidant defense system protects the plant from salt-induced oxidative damage by detoxifying the ROS and also by maintaining the balance of ROS generation under salt stress. Different plant hormones and genes are also associated with the signaling and antioxidant defense system to protect plants when they are exposed to salt stress. Salt-induced ROS overgeneration is one of the major reasons for hampering the morpho-physiological and biochemical activities of plants which can be largely restored through enhancing the antioxidant defense system that detoxifies ROS. In this review, we discuss the salt-induced generation of ROS, oxidative stress and antioxidant defense of plants under salinity.

scholarly journals Carbon Nanotubes Decrease the Negative Impact of Alternaria solani in Tomato Crop

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1080
Author(s):  
Yolanda González-García ◽  
Gregorio Cadenas-Pliego ◽  
Ángel Gabriel Alpuche-Solís ◽  
Raúl Iskander Cabrera ◽  
Antonio Juárez-Maldonado
Keyword(s):  
Carbon Nanotubes ◽  
Antioxidant Defense ◽  
Negative Impact ◽  
Alternaria Solani ◽  
Antioxidant Defense System ◽  
Fruit Rot ◽  
Defense System ◽  
Tomato Crop ◽  
Positive Effects ◽  
The Impact

The diseases that attack the tomato crop are a limiting factor for its production and are difficult to control or eradicate. Stem and fruit rot and leaf blight caused by Alternaria solani causes severe damage and substantial yield losses. Carbon nanotubes (CNTs) could be an alternative for the control of pathogens since they have strong antimicrobial activity, in addition to inducing the activation of the antioxidant defense system in plants. In the present study, multi-walled carbon nanotubes were evaluated on the incidence and severity of A. solani. Moreover, to the impact they have on the antioxidant defense system and the photosynthetic capacity of the tomato crop. The results show that the application of CNTs had multiple positive effects on tomato crop. CNTs decreased the incidence and severity of A. solani. Furthermore, CNTs increased the fruit yield of tomato crop and dry shoot biomass. The antioxidant system was improved, since the content of ascorbic acid, flavonoids, and the activity of the glutathione peroxidase enzyme were increased. The net photosynthesis and water use efficiency were also increased by the application of CNTs. CNTs can be an option to control A. solani in tomato crop, and diminish the negative impact of this pathogen.

Sign in / Sign up

Export Citation Format

Share Document