Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.2
3.7
Journals
Agronomy
Special Issues
Antioxidant Defenses in Crop Plants
share announcement

Antioxidant Defenses in Crop Plants

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Farming Sustainability".

Deadline for manuscript submissions: closed (20 February 2023) | Viewed by 8036

Special Issue Editor

Dr. Allan Klynger Da Silva Lobato

E-Mail Website
Guest Editor
Núcleo de Pesquisa Vegetal Básica e Aplicada, Universidade Federal Rural da Amazônia, Rodovia PA 256, Paragominas, Pará, Brazil
Interests: abiotic stresses; biotic stresses; brassinosteroids; plant growth regulators; neurotransmitters; gasotransmitters
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The effects of climate change represent a serious threat to food security because these global changes negatively interfere on agriculture. Crop plants exposed to abiotic and biotic stresses frequently overproduce reactive oxygen species, causing cell damages and negative interferences on plant metabolism. However, antioxidant defense modulated by genes and redox enzymes, including superoxide dismutase, catalase, ascorbate peroxidase, and peroxidase, represent a relevant and interesting strategy to control the excessive concentrations of these toxic compounds generated during abiotic and biotic stresses.

This Special Issue will focus on “Antioxidant Defenses in Crop Plants”. We welcome novel research and reviews covering all topics related, but not limited, to abiotic stresses (salinity, drought, flooding, toxic metals, high and low temperature and high irradiance), atmospheric pollutants (acid rain and zone), nutritional stress (deficiency and toxicity of macro and micronutrients), stress physiology, biotic stress (plant–microbe interaction and plant–pathogen interaction), adaptation of plants to the environment, plant response to stress, and stress interference on yield/production.

Dr. Allan Klynger Da Silva Lobato
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agronomy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • abiotic stress
  • biotic stress
  • antioxidant defense
  • redox metabolism
  • drought
  • heavy metal
  • nutritional stress
  • atmospheric pollutant
  • plant–pathogen interaction
  • plant–microbe interaction

Published Papers (4 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

21 pages, 10011 KiB  
Article
How Different Na+ Concentrations Affect Anatomical, Nutritional Physiological, Biochemical, and Morphological Aspects in Soybean Plants: A Multidisciplinary and Comparative Approach
by Breno Ricardo Serrão da Silva, Elaine Maria Silva Guedes Lobato, Leidy Alves dos Santos, Rodrigo Mendes Pereira, Bruno Lemos Batista, Mohammed Nasser Alyemeni, Parvaiz Ahmad and Allan Klynger da Silva Lobato
Agronomy 2023, 13(1), 232; https://doi.org/10.3390/agronomy13010232 - 12 Jan 2023
Cited by 3 | Viewed by 1513
Abstract
Soybean is a legume widely cultivated globally for its seeds, which are rich in oil and protein suitable for animal and human nutrition, and as a biofuel source. One of the main factors that limits production is soil salinity; currently there are an [...] Read more.
Soybean is a legume widely cultivated globally for its seeds, which are rich in oil and protein suitable for animal and human nutrition, and as a biofuel source. One of the main factors that limits production is soil salinity; currently there are an estimated 800 million hectares of agricultural land affected by salt stress worldwide. The aim of this research was to determine whether anatomical, morphological, nutritional, physiological, and biochemical parameters are negatively affected in soybean plants cultivated under different levels of salt stress. The experiment was randomized into five treatments (0, 50, 100, 150, and 200 mM Na+). Plants subjected to concentrations of 50 to 200 mM Na+ exhibited reductions in K (range 21% to 57%), Ca (range 38% to 63%), and Mg (range 20% to 41%) compared to controls (without Na+). Na+ stress progressively produced negative effects on photosynthetic machinery, gas exchange, and photosynthetic pigments, results clearly related to oxidative stress generated by the saline growth conditions. Interestingly, our study revealed that at concentrations up to 100 mM Na+ deposition of epicuticular wax occurred, the quantity and shape of the stomata changed, and the thickness of the leaf epidermis increased. Our broad-based, multidisciplinary, and comparative study proved that soybean plants suffer significant deleterious effects modulated by Na+ stress, mainly at concentrations above 100 mM Na+. Full article
(This article belongs to the Special Issue Antioxidant Defenses in Crop Plants)
►▼ Show Figures

Figure 1

19 pages, 4447 KiB  
Article
Applied Selenium as a Powerful Antioxidant to Mitigate the Harmful Effects of Salinity Stress in Snap Bean Seedlings
by Hoda A. S. Farag, Mohamed F. M. Ibrahim, Ahmed Abou El-Yazied, Hossam S. El-Beltagi, Hany G. Abd El-Gawad, Mohammed Alqurashi, Tarek A. Shalaby, Abdallah Tageldein Mansour, Abdulmalik A. Alkhateeb and Reham Farag
Agronomy 2022, 12(12), 3215; https://doi.org/10.3390/agronomy12123215 - 18 Dec 2022
Cited by 8 | Viewed by 1994
Abstract
Selenium (Se) plays several significant roles in regulating growth, development and plant responses to various abiotic stresses. However, its influence on sulfate transporters (SULTRS) and achieving the harmony with other salt-tolerance features is still limited in the previous literatures. This [...] Read more.
Selenium (Se) plays several significant roles in regulating growth, development and plant responses to various abiotic stresses. However, its influence on sulfate transporters (SULTRS) and achieving the harmony with other salt-tolerance features is still limited in the previous literatures. This study elucidated the effect of Se supplementation (5, 10 and 20 µM) on salt-stressed (50 mM NaCl) snap bean seedlings. Generally, the results indicated that Se had dual effects on the salt stressed seedlings according to its concentration. At a low level (5 µM), plants demonstrated a significant improvement in shoot (13.8%) and root (22.8%) fresh weight, chlorophyll a (7.4%), chlorophyll b (14.7%), carotenoids (23.2%), leaf relative water content (RWC; 8.5%), proline (17.2%), total soluble sugars (34.3%), free amino acids (FAA; 18.4%), K (36.7%), Ca (33.4%), K/Na ratio (77.9%), superoxide dismutase (SOD; 18%), ascorbate peroxidase (APX;12.8%) and guaiacol peroxidase (G-POX; 27.1%) compared to the untreated plants. Meanwhile, most of these responses as well as sulfur (S), Se and catalase (CAT) were obviously decreased in parallel with increasing the applied Se up to 20 µM. The molecular study revealed that three membrane sulfate transporters (SULTR1, SULTR2 and SULTR 3) in the root and leaves and salinity responsive genes (SOS1, NHX1 and Osmotin) in leaves displayed different expression patterns under various Se treatments. Conclusively, Se at low doses can be beneficial in mitigating salinity-mediated damage and achieving the functioning homeostasis to tolerance features. Full article
(This article belongs to the Special Issue Antioxidant Defenses in Crop Plants)
►▼ Show Figures

Figure 1

19 pages, 6364 KiB  
Article
24-Epibrassinolide Simultaneously Stimulates Photosynthetic Machinery and Biomass Accumulation in Tomato Plants under Lead Stress: Essential Contributions Connected to the Antioxidant System and Anatomical Structures
by Camille Ferreira Maia, Breno Ricardo Serrão da Silva, Bruno Lemos Batista, Andrzej Bajguz and Allan Klynger da Silva Lobato
Agronomy 2022, 12(9), 1985; https://doi.org/10.3390/agronomy12091985 - 23 Aug 2022
Cited by 6 | Viewed by 1730
Abstract
Several toxic pollutants are released into the atmosphere through human activities. Among these pollutants, lead (Pb) is a non-biodegradable element that can cause reduced cell division, impact negatively on the biosynthesis of photosynthetic pigments, and lower biomass accumulation, which can lead to plant [...] Read more.
Several toxic pollutants are released into the atmosphere through human activities. Among these pollutants, lead (Pb) is a non-biodegradable element that can cause reduced cell division, impact negatively on the biosynthesis of photosynthetic pigments, and lower biomass accumulation, which can lead to plant death. 24-epibrassinolide (EBR) is a plant growth regulator with broad benefits on physiological functions and biochemical responses, conferring tolerance to plants against several biotic and abiotic stresses. The experiment was randomized with four treatments, two lead concentrations (0 and 200 µM Pb, described as −Pb and +Pb, respectively) and two EBR (0 and 100 nM EBR, described as −EBR and +EBR, respectively). We detected a negative impact of Pb stress in tomato plants; however, the exogenous application of EBR induced protection on leaf anatomy and photosynthetic apparatus, mitigating the Pb impacts on growth. This steroid enhances the root and leaf structures (in root tissue, the epidermis thickness; and in the leaf, palisade parenchyma, and spongy parenchyma), improving the membrane selectivity, light energy absorption, and CO2 fixation. Applying 200 µM Pb and 100 nM EBR caused an increase in superoxide dismutase, catalase, ascorbate peroxidase, and peroxidase activity (by 26%, 18%, 25%, and 20%, respectively). Moreover, the improvements obtained on photosynthetic pigments, electron transport rate, the effective quantum yield of photosystem II photochemistry, and net photosynthetic rate prove the benefits and protection of photosynthetic apparatus, resulting in increased biomass accumulation, with increases of 95%, 115%, 74%, and 92% in leaf, root, stem, and the whole plant, respectively. Taken together, our findings confirm that EBR alleviates the damages provoked by Pb stress in tomatoes. Full article
(This article belongs to the Special Issue Antioxidant Defenses in Crop Plants)
►▼ Show Figures

Figure 1

18 pages, 3047 KiB  
Article
Zinc Supplementation Enhances Glutathione-Mediated Antioxidant Defense and Glyoxalase Systems to Conferring Salt Tolerance in Soybean (Glycine max L.)
by Hassan S. Al-Zahrani, Kamrun Nahar, Hesham F. Alharby, Hameed Alsamadany, Khalid Rehman Hakeem and Mirza Hasanuzzaman
Agronomy 2022, 12(5), 1032; https://doi.org/10.3390/agronomy12051032 - 26 Apr 2022
Cited by 7 | Viewed by 2162
Abstract
In this study, the role of zinc (Zn) in salt-affected soybean (Glycine max L.) was scrutinized by exposing plants to salt stress (150 mM NaCl) alone and in combination with exogenous Zn (priming and/or foliar spray with 1 mM ZnSO4.7H [...] Read more.
In this study, the role of zinc (Zn) in salt-affected soybean (Glycine max L.) was scrutinized by exposing plants to salt stress (150 mM NaCl) alone and in combination with exogenous Zn (priming and/or foliar spray with 1 mM ZnSO4.7H2O). Salt stress decreased plant growth and caused the destruction of chlorophyll and carotenoids. It also disrupted physiological processes and antioxidant defenses, resulting in an oxidative burst. The levels of the toxic metabolite methylglyoxal (MG) rose substantially under salinity. Salinity resulted in a high accumulation of Na+ and decreased K+ which decreased the K+/Na+ ratio. Zn supplementation decreased ion toxicity and improved ion homeostasis in soybean plants. Zn increased glutathione (GSH) levels, decreased glutathione disulfide levels, and increased their ratio in salt-treated soybean plants compared to salt-treated plants without Zn addition. Zn supplementation also upregulated the activities of the glutathione-dependent enzymes glutathione reductase, dehydroascorbate reductase, glutathione peroxidase, and glutathione S-transferase in salt-stressed plants. The enhanced GSH pool and increased activity of GSH-dependent enzymes decreased oxidative damage, as indicated by the reduced levels of H2O2 and malondialdehyde and lower electrolyte leakage. The increased GSH level and high activity of glyoxalase I and glyoxalase II conferred by Zn under salt stress helped to scavenge methylglyoxal. The restoration of photosynthetic pigment levels and increased proline accumulation, together with the recovery of leaf relative water content, were further signs of salt stress recovery and tolerance conferred by Zn supplementation. Our results showed that the antioxidant defense, glyoxalase system and some other physiological parameters were improved by Zn supplementation which contributed to mitigating the effects of salt stress in soybean. Full article
(This article belongs to the Special Issue Antioxidant Defenses in Crop Plants)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-4
Back to TopTop