scholarly journals Pure Organic Active Compounds Against Abiotic Stress: A Biostimulant Overview

2020 ◽  
Vol 11 ◽  
Author(s):  
Ana L. García-García ◽  
Francisco J. García-Machado ◽  
Andrés A. Borges ◽  
Sarai Morales-Sierra ◽  
Alicia Boto ◽  
...  
Keyword(s):  
Climate Change ◽  
Abiotic Stress ◽  
State Of The Art ◽  
New Products ◽  
Plant Stress ◽  
Plant Defence ◽  
Yield Losses ◽  
Positive Effects ◽  
Agricultural Yields ◽  
Algal Extracts

Biostimulants (BSs) are probably one of the most promising alternatives nowadays to cope with yield losses caused by plant stress, which are intensified by climate change. Biostimulants comprise many different compounds with positive effects on plants, excluding pesticides and chemical fertilisers. Usually mixtures such as lixiviates from proteins or algal extracts have been used, but currently companies are interested in more specific compounds that are capable of increasing tolerance against abiotic stress. Individual application of a pure active compound offers researchers the opportunity to better standarise formulations, learn more about the plant defence process itself and assist the agrochemical industry in the development of new products. This review attempts to summarise the state of the art regarding various families of organic compounds and their mode/mechanism of action as BSs, and how they can help maximise agricultural yields under stress conditions aggravated by climate change.

scholarly journals Reaction of Hydrogen sulfide homeostasis genes under biotic and abiotic stress condition in rice – computational approach

2018 ◽  
Author(s):  
Ganesh Alagarasan ◽  
Jegadeesan Ramalingam
Keyword(s):  
Hydrogen Sulfide ◽  
Abiotic Stress ◽  
Genetic Relatedness ◽  
Negative Impact ◽  
Crop Improvement ◽  
Plant Stress ◽  
Biotic And Abiotic Stress ◽  
Positive Effects ◽  
Pan Genome ◽  
Improvement Programs

AbstractGaseous molecules are widespread signaling compounds, regulating the cell development process in all major plant parts. For many decades, hydrogen sulfide molecule is considered mainly for its deleterious effects on plant system. The increasing recent experimental evidence and phenomenal concepts on H2S molecule further advance our understanding of H2S interaction with plant tissues. In addition, the H2S messenger molecule is found to have positive effects on plant growth, in limited condition, to maintain the balanced homeostasis. To meet the increasing demand, and to sustain the crop yield, various crop improvement programs have been followed. However, there is a concern that traditional plant improvement method and increasing climate change has a negative impact on crop production. A major approach to combating plant stress is to evaluate and explore the alternate source mechanism(s). Towards this aim, it will be valuable to characterize the genes involved in H2S homeostasis in the staple food crop rice pan-genome. In this research, we identified 15 H2S homeostasis genes in rice and used it for the ~3k rice pan-genome analysis to find out the genetic relatedness based on single nucleotide polymorphism data. Multidimensional scale plot of 15 H2S homeostasis genes among the rice cultivars, and RNA-seq experimental data analysis under various biotic and abiotic stress shows the functional genes involved in biotic and abiotic stress. This study provides new insights into plant stress management in crop breeding and suggests how H2S gene(s) can be utilized to improve the agronomic traits in rice and other food crops.

HOW CLIMATE CHANGE CAN INFLUENCE THE AGRICULTURE IN UKRAINE: A REVIEW

2020 ◽  
Author(s):  
N. Maidanovych ◽  
Keyword(s):  
Climate Change ◽  
Crop Yields ◽  
Soil Surface ◽  
Winter Period ◽  
Negative Consequences ◽  
Resource Saving ◽  
Impact Of Climate Change ◽  
Positive Effects ◽  
Average Annual Temperature ◽  
The Impact

The purpose of this work is to review and analyze the main results of modern research on the impact of climate change on the agro-sphere of Ukraine. Results. Analysis of research has shown that the effects of climate change on the agro-sphere are already being felt today and will continue in the future. The observed climate changes in recent decades have already significantly affected the shift in the northern direction of all agro-climatic zones of Europe, including Ukraine. From the point of view of productivity of the agro-sphere of Ukraine, climate change will have both positive and negative consequences. The positives include: improving the conditions of formation and reducing the harvesting time of crop yields; the possibility of effective introduction of late varieties (hybrids), which require more thermal resources; improving the conditions for overwintering crops; increase the efficiency of fertilizer application. Model estimates of the impact of climate change on wheat yields in Ukraine mainly indicate the positive effects of global warming on yields in the medium term, but with an increase in the average annual temperature by 2 ° C above normal, grain yields are expected to decrease. The negative consequences of the impact of climate change on the agrosphere include: increased drought during the growing season; acceleration of humus decomposition in soils; deterioration of soil moisture in the southern regions; deterioration of grain quality and failure to ensure full vernalization of grain; increase in the number of pests, the spread of pathogens of plants and weeds due to favorable conditions for their overwintering; increase in wind and water erosion of the soil caused by an increase in droughts and extreme rainfall; increasing risks of freezing of winter crops due to lack of stable snow cover. Conclusions. Resource-saving agricultural technologies are of particular importance in the context of climate change. They include technologies such as no-till, strip-till, ridge-till, which make it possible to partially store and accumulate mulch on the soil surface, reduce the speed of the surface layer of air and contribute to better preservation of moisture accumulated during the autumn-winter period. And in determining the most effective ways and mechanisms to reduce weather risks for Ukrainian farmers, it is necessary to take into account the world practice of climate-smart technologies.

scholarly journals Climate Change, Weather, Housing Precarity, and Homelessness: A Systematic Review of Reviews

2021 ◽  
Vol 18 (11) ◽  
pp. 5812
Author(s):  
Mariya Bezgrebelna ◽  
Kwame McKenzie ◽  
Samantha Wells ◽  
Arun Ravindran ◽  
Michael Kral ◽  
...  
Keyword(s):  
Climate Change ◽  
Systematic Review ◽  
Natural Disasters ◽  
Green Infrastructure ◽  
Temperature Extremes ◽  
Weather Extremes ◽  
Positive Effects ◽  
Increased Risk ◽  
Review Of Reviews ◽  
The Impact

This systematic review of reviews was conducted to examine housing precarity and homelessness in relation to climate change and weather extremes internationally. In a thematic analysis of 15 reviews (5 systematic and 10 non-systematic), the following themes emerged: risk factors for homelessness/housing precarity, temperature extremes, health concerns, structural factors, natural disasters, and housing. First, an increased risk of homelessness has been found for people who are vulnerably housed and populations in lower socio-economic positions due to energy insecurity and climate change-induced natural hazards. Second, homeless/vulnerably-housed populations are disproportionately exposed to climatic events (temperature extremes and natural disasters). Third, the physical and mental health of homeless/vulnerably-housed populations is projected to be impacted by weather extremes and climate change. Fourth, while green infrastructure may have positive effects for homeless/vulnerably-housed populations, housing remains a major concern in urban environments. Finally, structural changes must be implemented. Recommendations for addressing the impact of climate change on homelessness and housing precarity were generated, including interventions focusing on homelessness/housing precarity and reducing the effects of weather extremes, improved housing and urban planning, and further research on homelessness/housing precarity and climate change. To further enhance the impact of these initiatives, we suggest employing the Human Rights-Based Approach (HRBA).

Family doctors to connect global concerns due to climate change with local actions : State‐of‐the art and some proposals

2021 ◽  
Author(s):  
Paolo Lauriola ◽  
Alice Serafini ◽  
Mariagrazia Santamaria ◽  
Stefano Guicciardi ◽  
Peter K. Kurotschka ◽  
...  
Keyword(s):  
Climate Change ◽  
State Of The Art ◽  
Family Doctors

Climate Change Surge: Implementing Stringent Mitigation and Adaptation Strategies in South Africa

2010 ◽  
Vol 54 (2) ◽  
pp. 159-183
Author(s):  
Kola Odeku ◽  
Edson Meyer
Keyword(s):  
Climate Change ◽  
South African ◽  
Local Governments ◽  
State Of The Art ◽  
Adaptation Strategies ◽  
Mitigation Measures ◽  
African Government ◽  
Mitigation And Adaptation ◽  
Vulnerability To Climate Change ◽  
Mitigation And Adaptation Strategies

AbstractThis article examines how the South African government, realizing the country's vulnerability to climate change, deemed it necessary to strengthen adaptation and mitigation measures and put in place legal and institutional frameworks to ensure implementation and compliance. Government must take responsibility for industry's inaction by implementing policies on climate change and, more importantly, through a visible change in government policy to hold industry accountable. The stringent policies and strategies being put in place are reducing vulnerability and also enhancing a broad spectrum of capacity in responding to environmental, climatic, resource and economic perturbations. The article further reviews state of the art methods and tools available to strengthen mitigation and adaptation strategies and measures in the areas of the existing frameworks regarding climate change. It also considers various measures by Eskom in particular, and strategies embarked upon by South Africa's national and local governments to reduce greenhouse gas emissions.

Climate Change Impacts on Agriculture in Latin America and the Caribbean: An Application of the Integrated Economic-Environmental Modeling (IEEM) Platform

2021 ◽  
Author(s):  
Onil Banerjee ◽  
Martin Cicowiez ◽  
Ana Rios ◽  
Cicero De Lima
Keyword(s):  
Climate Change ◽  
Labor Productivity ◽  
Latin American ◽  
Climate Change Impacts ◽  
Crop Productivity ◽  
Environmental Modeling ◽  
Sectoral Output ◽  
The Caribbean ◽  
Negative Impacts ◽  
Agricultural Yields

In this paper, we assess the economy-wide impact of Climate Change (CC) on agriculture and food security in 20 Latin American and the Caribbean (LAC) countries. Specifically, we focus on the following three channels through which CC may affect agricultural and non-agricultural production: (i) agricultural yields; (ii) labor productivity in agriculture, and; (iii) economy-wide labor productivity. We implement the analysis using the Integrated Economic-Environmental Model (IEEM) and databases for 20 LAC available through the OPEN IEEM Platform. Our analysis identifies those countries most affected according to key indicators including Gross Domestic Product (GDP), international commerce, sectoral output, poverty, and emissions. Most countries experience negative impacts on GDP, with the exception of the major soybean producing countries, namely, Brazil, Argentina and Uruguay. We find that CC-induced crop productivity and labor productivity changes affect countries differently. The combined impact, however, indicates that Belize, Nicaragua, Guatemala and Paraguay would fare the worst. Early identification of these hardest hit countries can enable policy makers pre-empting these effects and beginning the design of adaptation strategies early on. In terms of greenhouse gas emissions, only Argentina, Chile and Uruguay would experience small increases in emissions.

A comprehensive review of algal biochar for soil improvement: bottlenecks and opportunities

2021 ◽  
Author(s):  
Jiacheng Sun ◽  
Ondrej Masek
Keyword(s):  
Climate Change ◽  
Environmental Sustainability ◽  
Carbon Capture And Storage ◽  
Soil Improvement ◽  
Chemical Oxidation ◽  
Chemical Compositions ◽  
Mineral Contents ◽  
Comprehensive Review ◽  
Positive Effects ◽  
Algal Biochar

<p>In recent years, the rapid increase of CO<sub>2</sub> emission in the atmosphere and the resulting issues such as global warming and climate change have now become significant barriers to environmental sustainability. Although fossil CO<sub>2</sub> emissions have decreased in some of the world's largest emitters, including 11% in the EU, 12% in the US and 1.7% in China annually, the estimated global CO<sub>2</sub> emission amount still reached 40 G tonnes in 2020. The purpose of studying biochar produced by pyrolysis is essential to develop the knowledge of carbon cycles and nutrient components in soil. Among all types of feedstocks, algae grow incredibly rapidly compared to other biological materials, about 500-1500 times higher, which will boot the carbon sequestration rate. Therefore, the study of algal biochar production through pyrolysis has great significance for migrating climate change and developing carbon capture and storage.</p><p>This study focuses on a comprehensive review of previous literature on conventional and advanced macroalgae and microalgae pyrolysis for producing biochar and related valuable by-products like bio-oil and bio-syngas, aiming to establish a state-of-the-art of algal biochar for different soil-related applications and demonstrate the bottlenecks and opportunities. Specifically, a thorough comparison of algae species (20 microalgae and 20 macroalgae) is developed to benefit future researchers, involving chemical compositions, proximate analysis, solid-product fraction, physical properties and chemical properties. Redox conditions, surface functional groups and pH conditions are determined in lab-scale. Moreover, different algal biochar applications on soil and plant are analysed to optimise the commercial value of algal biochar, including soil conditioner, compositing additives, carrier for fertilisers, manure treatment and stable blending. Due to the abundant mineral contents (0.23-1.21% Na, 0.03-2.92% K, 0.75-7.17% Al, 0.19-1.24% Mg, 6.5-7% Ca and 0.04-0.69% Fe) of algal biochar, this study not only reviews the positive effects on soil improvement but also negative effects such as phytotoxic effect and heavy-metal pollution. A laboratory-based chemical oxidation approach (Edinburgh Stability Tool) is used to assess relatively long-term biochar stability and the influence of nutrient cycling. The optimal pyrolysis conditions (temperature, retention time and heating rate) and potential future commercial applications are obtained through the comprehensive review of algal biochar for soil improvement.    </p>

Plant-specific VQ-domain proteins as interaction partners of WRKY transcription factors

2014 ◽  
Vol 12 (S1) ◽  
pp. S121-S124
Author(s):  
Soon Il Kwon ◽  
D. J. Hwang
Keyword(s):  
Transcription Factors ◽  
Biological Effects ◽  
Plant Stress ◽  
Plant Defence ◽  
Genomic Analysis ◽  
Wrky Transcription Factors ◽  
Defence Mechanisms ◽  
Interaction Partners ◽  
Defence Responses ◽  
Plant Defence Responses

VQ-domain proteins are known to interact with WRKY transcription factors and have been reported to be involved in plant defence responses to environmental stresses in Arabidopsis. Thus, elucidation of the defence mechanisms during the interaction of VQ-domain proteins and WRKY transcription factors could provide useful insights into the regulation of VQ-domain protein-mediated WRKY transcription factors. As the focus of this review, we summarize the genomic analysis of the VQ-domain proteins as one of the WRKY-interacting proteins and their biological effects during plant stress conditions in Arabidopsis and rice.

scholarly journals Skewed temperature dependence affects range and abundance in a warming world

2018 ◽  
Author(s):  
Amy Hurford ◽  
Christina A. Cobbold ◽  
Péter K. Molnár
Keyword(s):  
Climate Change ◽  
Population Growth ◽  
Climate Warming ◽  
Synergistic Effects ◽  
Climate Change Impacts ◽  
Integrodifference Equation ◽  
Positive Effects ◽  
Growth Metrics ◽  
Fitness Curve ◽  
Warming World

AbstractPopulation growth metrics such asR0are usually asymmetric functions of temperature, with cold-skewed curves arising when the positive effects of a temperature increase outweigh the negative effects, and warm-skewed curves arising in the opposite case. Classically, cold-skewed curves are interpreted as more beneficial to a species under climate warming, because cold-skewness implies increased population growth over a larger proportion of the species’ fundamental thermal niche than warm-skewness. However, inference based on the shape of the fitness curve alone, and without considering the synergistic effects of net reproduction, density, and dispersal may yield an incomplete understanding of climate change impacts. We formulate a moving-habitat integrodifference equation model to evaluate how fitness curve skewness affects species’ range size and abundance during climate warming. In contrast to classic interpretations, we find that climate warming adversely affects populations with cold-skewed fitness curves, positively affects populations with warm-skewed curves and has relatively little or mixed effects on populations with symmetric curves. Our results highlight the synergistic effects of fitness curve skewness, spatially heterogeneous densities, and dispersal in climate change impact analyses, and that the common approach of mapping changes only inR0may be misleading.

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