scholarly journals ROS and NO Regulation by Melatonin Under Abiotic Stress in Plants

Antioxidants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1078
Author(s):  
Miriam Pardo-Hernández ◽  
Maria López-Delacalle ◽  
Rosa M. Rivero
Keyword(s):  
Abiotic Stress ◽  
Abiotic Stresses ◽  
Abiotic Stress Tolerance ◽  
Nutrient Deficiency ◽  
Protective Role ◽  
Stress Factors ◽  
Negative Effects ◽  
Antioxidant Defense Systems ◽  
Related Proteins ◽  
Physiological Reactions

Abiotic stress in plants is an increasingly common problem in agriculture, and thus, studies on plant treatments with specific compounds that may help to mitigate these effects have increased in recent years. Melatonin (MET) application and its role in mitigating the negative effects of abiotic stress in plants have become important in the last few years. MET, a derivative of tryptophan, is an important plant-related response molecule involved in the growth, development, and reproduction of plants, and the induction of different stress factors. In addition, MET plays a protective role against different abiotic stresses such as salinity, high/low temperature, high light, waterlogging, nutrient deficiency and stress combination by regulating both the enzymatic and non-enzymatic antioxidant defense systems. Moreover, MET interacts with many signaling molecules, such as reactive oxygen species (ROS) and nitric oxide (NO), and participates in a wide variety of physiological reactions. It is well known that NO produces S-nitrosylation and NO2-Tyr of important antioxidant-related proteins, with this being an important mechanism for maintaining the antioxidant capacity of the AsA/GSH cycle under nitro-oxidative conditions, as extensively reviewed here under different abiotic stress conditions. Lastly, in this review, we show the coordinated actions between NO and MET as a long-range signaling molecule, regulating many responses in plants, including plant growth and abiotic stress tolerance. Despite all the knowledge acquired over the years, there is still more to know about how MET and NO act on the tolerance of plants to abiotic stresses.

scholarly journals ROS and NO Regulation by Melatonin Under Abiotic Stress in Plants

2020 ◽  
Author(s):  
Miriam Pardo-Hernandez ◽  
Maria Lopez-Delacalle ◽  
Rosa M Rivero
Keyword(s):  
Abiotic Stress ◽  
Abiotic Stresses ◽  
Abiotic Stress Tolerance ◽  
Nutrient Deficiency ◽  
Protective Role ◽  
Stress Factors ◽  
Negative Effects ◽  
Antioxidant Defense Systems ◽  
Related Proteins ◽  
Physiological Reactions

Abiotic stress in plants is an increasingly common problem in agriculture, and thus, studies on plant treatments with specific certain compounds that may help to mitigate these effects have increased in recent years Melatonin (MET) application and its role in mitigating the negative effects of abiotic stress in plants have become important in the last few years. MET, a derivative of tryptophan, is an important plant-related response molecule involved in the growth, development, and reproduction of plants, and the induction of different stress factors. In addition, MET plays a protective role against different abiotic stresses such as salinity, high/low temperature, high light, waterlogging, nutrient deficiency and stress combination by regulating both the enzymatic and non-enzymatic antioxidant defense systems. Also, MET interacts with many signaling molecules, among these, reactive oxygen species (ROS) and nitric oxide (NO), and participates in a wide variety of physiological reactions. It is well known that NO produces S-nitrosylation and NO2-Tyr of important antioxidant-related proteins, being this an important mechanism for maintaining the antioxidant capacity of the AsA/GSH cycle under nitro-oxidative conditions, being extensively reviewed here under different abiotic stress conditions. Lastly, in this review, we show the coordination between NO and MET as a long-range signaling molecule, regulating many responses in plants, including plant growth and abiotic stress tolerance. Despite all the knowledge acquired over the years, there is still more to know about how MET and NO act on tolerance to abiotic stresses.

scholarly journals How Abiotic Stress Conditions Affects Plant Roots

2020 ◽  
Author(s):  
Raziye Kul ◽  
Melek Ekinci ◽  
Metin Turan ◽  
Selda Ors ◽  
Ertan Yildirim
Keyword(s):  
Abiotic Stress ◽  
Nutrient Deficiency ◽  
Stress Conditions ◽  
Stress Factors ◽  
Plant Roots ◽  
Molecular Characteristics ◽  
Nutrient Deficiencies ◽  
Negative Effects ◽  
Abiotic Stress Factors ◽  
High And Low Temperatures

Roots are generally subject to more abiotic stress than shoots. Therefore, they can be affected by such stresses as much as, or even more, than above ground parts of a plant. However, the effect of abiotic stresses on root structure and development has been significantly less studied than above ground parts of plants due to limited availability for root observations. Roots have functions such as connecting the plant to the environment in which it grows, uptaking water and nutrients and carrying them to the above-ground organs of the plant, secreting certain hormones and organic compounds, and thus ensuring the usefulness of nutrients in the nutrient solution. Roots also send some hormonal signals to the body in stress conditions such as drought, nutrient deficiencies, salinity, to prevent the plant from being damaged, and ensure that the above-ground part takes the necessary precautions to adapt to these adverse conditions. Salinity, drought, radiation, high and low temperatures, heavy metals, flood, and nutrient deficiency are abiotic stress factors and they negatively affect plant growth, productivity and quality. Given the fact that impending climate change increases the frequency, duration, and severity of stress conditions, these negative effects are estimated to increase. This book chapter reviews to show how abiotic stress conditions affect growth, physiological, biochemical and molecular characteristics of plant roots.

scholarly journals Citric Acid-Mediated Abiotic Stress Tolerance in Plants

2021 ◽  
Vol 22 (13) ◽  
pp. 7235
Author(s):  
Md. Tahjib-Ul-Arif ◽  
Mst. Ishrat Zahan ◽  
Md. Masudul Karim ◽  
Shahin Imran ◽  
Charles T. Hunter ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Citric Acid ◽  
Stress Tolerance ◽  
Metabolic Networks ◽  
Abiotic Stress Tolerance ◽  
Heavy Metal Stress ◽  
Stress Conditions ◽  
Growth And Yield ◽  
Antioxidant Defense Systems ◽  
Physiological Outcomes

Several recent studies have shown that citric acid/citrate (CA) can confer abiotic stress tolerance to plants. Exogenous CA application leads to improved growth and yield in crop plants under various abiotic stress conditions. Improved physiological outcomes are associated with higher photosynthetic rates, reduced reactive oxygen species, and better osmoregulation. Application of CA also induces antioxidant defense systems, promotes increased chlorophyll content, and affects secondary metabolism to limit plant growth restrictions under stress. In particular, CA has a major impact on relieving heavy metal stress by promoting precipitation, chelation, and sequestration of metal ions. This review summarizes the mechanisms that mediate CA-regulated changes in plants, primarily CA’s involvement in the control of physiological and molecular processes in plants under abiotic stress conditions. We also review genetic engineering strategies for CA-mediated abiotic stress tolerance. Finally, we propose a model to explain how CA’s position in complex metabolic networks involving the biosynthesis of phytohormones, amino acids, signaling molecules, and other secondary metabolites could explain some of its abiotic stress-ameliorating properties. This review summarizes our current understanding of CA-mediated abiotic stress tolerance and highlights areas where additional research is needed.

scholarly journals Down-Regulation of SlGRAS10 in Tomato Confers Abiotic Stress Tolerance

Genes ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 623
Author(s):  
Sidra Habib ◽  
Yee Yee Lwin ◽  
Ning Li
Keyword(s):  
Salt Stress ◽  
Abiotic Stress ◽  
Plant Growth ◽  
Stress Tolerance ◽  
Abiotic Stresses ◽  
Abiotic Stress Tolerance ◽  
Functional Characterization ◽  
Flavonoid Biosynthesis ◽  
Ros Scavenging ◽  
Down Regulation

Adverse environmental factors like salt stress, drought, and extreme temperatures, cause damage to plant growth, development, and crop yield. GRAS transcription factors (TFs) have numerous functions in biological processes. Some studies have reported that the GRAS protein family plays significant functions in plant growth and development under abiotic stresses. In this study, we demonstrated the functional characterization of a tomato SlGRAS10 gene under abiotic stresses such as salt stress and drought. Down-regulation of SlGRAS10 by RNA interference (RNAi) produced dwarf plants with smaller leaves, internode lengths, and enhanced flavonoid accumulation. We studied the effects of abiotic stresses on RNAi and wild-type (WT) plants. Moreover, SlGRAS10-RNAi plants were more tolerant to abiotic stresses (salt, drought, and Abscisic acid) than the WT plants. Down-regulation of SlGRAS10 significantly enhanced the expressions of catalase (CAT), peroxidase (POD), and superoxide dismutase (SOD) to reduce the effects of reactive oxygen species (ROS) such as O2− and H2O2. Malondialdehyde (MDA) and proline contents were remarkably high in SlGRAS10-RNAi plants. Furthermore, the expression levels of chlorophyll biosynthesis, flavonoid biosynthesis, and stress-related genes were also enhanced under abiotic stress conditions. Collectively, our conclusions emphasized the significant function of SlGRAS10 as a stress tolerate transcription factor in a certain variety of abiotic stress tolerance by enhancing osmotic potential, flavonoid biosynthesis, and ROS scavenging system in the tomato plant.

scholarly journals WRKY Proteins: Signaling and Regulation of Expression during Abiotic Stress Responses

2015 ◽  
Vol 2015 ◽  
pp. 1-17 ◽  
Author(s):  
Aditya Banerjee ◽  
Aryadeep Roychoudhury
Keyword(s):  
Abiotic Stress ◽  
Stress Responses ◽  
Biotic Stress ◽  
Abiotic Stresses ◽  
Abiotic Stress Tolerance ◽  
Plant Signaling ◽  
Biological Functions ◽  
Abiotic And Biotic Stress ◽  
Regulation Of Expression ◽  
Wrky Proteins

WRKY proteins are emerging players in plant signaling and have been thoroughly reported to play important roles in plants under biotic stress like pathogen attack. However, recent advances in this field do reveal the enormous significance of these proteins in eliciting responses induced by abiotic stresses. WRKY proteins act as major transcription factors, either as positive or negative regulators. Specific WRKY factors which help in the expression of a cluster of stress-responsive genes are being targeted and genetically modified to induce improved abiotic stress tolerance in plants. The knowledge regarding the signaling cascade leading to the activation of the WRKY proteins, their interaction with other proteins of the signaling pathway, and the downstream genes activated by them are altogether vital for justified targeting of theWRKYgenes. WRKY proteins have also been considered to generate tolerance against multiple abiotic stresses with possible roles in mediating a cross talk between abiotic and biotic stress responses. In this review, we have reckoned the diverse signaling pattern and biological functions of WRKY proteins throughout the plant kingdom along with the growing prospects in this field of research.

scholarly journals Plant-Microbe Interactions in Alleviating Abiotic Stress—A Mini Review

2021 ◽  
Vol 3 ◽  
Author(s):  
Michael Prabhu Inbaraj
Keyword(s):  
Abiotic Stress ◽  
Plant Growth ◽  
Mycorrhizal Fungi ◽  
Abiotic Stresses ◽  
Current Knowledge ◽  
Crop Plants ◽  
Stress Factors ◽  
Limiting Factors ◽  
Nutrient Deficiencies ◽  
The Impact

Crop plants are continuously exposed to various abiotic stresses like drought, salinity, ultraviolet radiation, low and high temperatures, flooding, metal toxicities, nutrient deficiencies which act as limiting factors that hampers plant growth and low agricultural productivity. Climate change and intensive agricultural practices has further aggravated the impact of abiotic stresses leading to a substantial crop loss worldwide. Crop plants have to get acclimatized to various environmental abiotic stress factors. Though genetic engineering is applied to improve plants tolerance to abiotic stresses, these are long-term strategies, and many countries have not accepted them worldwide. Therefore, use of microbes can be an economical and ecofriendly tool to avoid the shortcomings of other strategies. The microbial community in close proximity to the plant roots is so diverse in nature and can play an important role in mitigating the abiotic stresses. Plant-associated microorganisms, such as endophytes, arbuscular mycorrhizal fungi (AMF), and plant growth-promoting rhizobacteria (PGPR), are well-documented for their role in promoting crop productivity and providing stress tolerance. This mini review highlights and discusses the current knowledge on the role of various microbes and it's tolerance mechanisms which helps the crop plants to mitigate and tolerate varied abiotic stresses.

CRISPR-mediated genome editing in maize for improved abiotic stress tolerance.

2021 ◽  
pp. 405-420
Author(s):  
Ali Razzaq ◽  
Ghulam Mustafa ◽  
Muhammad Amjad Ali ◽  
Muhammad Sarwar Khan ◽  
Faiz Ahmad Joyia
Keyword(s):  
Abiotic Stress ◽  
Stress Tolerance ◽  
Genome Editing ◽  
Abiotic Stresses ◽  
Abiotic Stress Tolerance ◽  
Maize Yield ◽  
Maize Genome ◽  
Yield Improvement ◽  
Maize Cultivars ◽  
Genome Manipulation

Abstract This chapter discusses the applications of CRISPR-mediated genome editing to improve the abiotic stress tolerance (such as drought, heat, waterlogging and cold tolerance) of maize. CRISPR/Cas9 has great potential for maize genome manipulation at desired sites. By using CRISPR/Cas9-mediated genome editing, numerous genes can be targeted to produce elite maize cultivars that minimize the challenges of abiotic stresses. In the future, more precise and accurate variants of the CRISPR/Cas9 toolbox are expected to be used for maize yield improvement.

scholarly journals Physiological and Molecular Characterization of Crop Resistance to Abiotic Stresses

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1308
Author(s):  
Monica Boscaiu ◽  
Ana Fita
Keyword(s):  
Abiotic Stress ◽  
Stress Tolerance ◽  
Crop Yields ◽  
Agronomic Traits ◽  
Abiotic Stress Tolerance ◽  
Genetic Material ◽  
Morphological Characteristics ◽  
Stress Factors ◽  
Special Issue ◽  
Heat And Cold Stress

Abiotic stress represents a main constraint for agriculture, affecting plant growth and productivity. Drought and soil salinity, especially, are major causes of reduction of crop yields and food production worldwide. It is not unexpected, therefore, that the study of plant responses to abiotic stress and stress tolerance mechanisms is one of the most active research fields in plant biology. This Special Issue compiles 22 research papers and 4 reviews covering different aspects of these responses and mechanisms, addressing environmental stress factors such as drought, salinity, flooding, heat and cold stress, deficiency or toxicity of compounds in the soil (e.g., macro and micronutrients), and combination of different stresses. The approaches used are also diverse, including, among others, the analysis of agronomic traits based on morphological characteristics, physiological and biochemical studies, and transcriptomics or transgenics. Despite its complexity, we believe that this Special Issue provides a useful overview of the topic, including basic information on the mechanisms of abiotic stress tolerance as well as practical aspects such as the alleviation of the deleterious effects of stress by different means, or the use of local landraces as a source of genetic material adapted to combined stresses. This knowledge should help to develop the agriculture of the (near) future, sustainable and better adapted to the conditions ahead, in a scenario of global warming and environmental pollution.

scholarly journals Coordinated Actions of Glyoxalase and Antioxidant Defense Systems in Conferring Abiotic Stress Tolerance in Plants

2017 ◽  
Vol 18 (1) ◽  
pp. 200 ◽  
Author(s):  
Mirza Hasanuzzaman ◽  
Kamrun Nahar ◽  
Md. Hossain ◽  
Jubayer Mahmud ◽  
Anisur Rahman ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Stress Tolerance ◽  
Antioxidant Defense ◽  
Abiotic Stress Tolerance ◽  
Defense Systems ◽  
Antioxidant Defense Systems

scholarly journals Genome wide identification of NAC transcription factors and their role in abiotic stress tolerance in Chenopodium quinoa

2019 ◽  
Author(s):  
Nouf Owdah Alshareef ◽  
Elodie Rey ◽  
Holly Khoury ◽  
Mark Tester ◽  
Sandra M. Schmöckel
Keyword(s):  
Transcription Factor ◽  
Transcription Factors ◽  
Abiotic Stress ◽  
Stress Tolerance ◽  
Abiotic Stresses ◽  
Abiotic Stress Tolerance ◽  
Chenopodium Quinoa ◽  
Phosphate Starvation ◽  
Water Deficiency ◽  
Genome Wide

AbstractChenopodium quinoa Willd. (quinoa) is a pseudocereal with high nutritional value and relatively high tolerance to several abiotic stresses, including water deficiency and salt stress, making it a suitable plant for the study of mechanisms of abiotic stress tolerance. NAC (NAM, ATAF and CUC) transcription factors are involved in a range of plant developmental processes and in the response of plants to biotic and abiotic stresses. In the present study, we perform a genome-wide comprehensive analysis of the NAC transcription factor gene family in quinoa. In total, we identified 107 quinoa NAC transcription factor genes, distributed equally between sub-genomes A and B. They are phylogenetically clustered into two major groups and 18 subgroups. Almost 75% of the identified CqNAC genes were duplicated two to seven times and the remaining 25% of the CqNAC genes were found as a single copy. We analysed the transcriptional responses of the identified quinoa NAC TF genes in response to various abiotic stresses. The transcriptomic data revealed 28 stress responsive CqNAC genes, where their expression significantly changed in response to one or more abiotic stresses, including salt, water deficiency, heat and phosphate starvation. Among these stress responsive NACs, some were previously known to be stress responsive in other species, indicating their potentially conserved function in response to abiotic stress across plant species. Six genes were differentially expressed specifically in response to phosphate starvation but not to other stresses, and these genes may play a role in controlling plant responses to phosphate deficiency. These results provide insights into quinoa NACs that could be used in the future for genetic engineering or molecular breeding.

Sign in / Sign up

Export Citation Format

Share Document