scholarly journals A Symbiotic Approach to Generating Stress Tolerant Crops

2021 ◽  
Vol 9 (5) ◽  
pp. 920
Author(s):  
Regina S. Redman ◽  
Yong Ok Kim ◽  
Sang Cho ◽  
Malia Mercer ◽  
Melissa Rienstra ◽  
...  
Keyword(s):  
South Korea ◽  
Stress Tolerance ◽  
Crop Yields ◽  
Plant Protection ◽  
Fungal Endophytes ◽  
Treatment Plant ◽  
Field Testing ◽  
Weedy Rice ◽  
Rice Plants ◽  
The Usa

Studies were undertaken to determine if fungal endophytes from plants in stressful habitats could be commercialized to generate climate resilient crop plants. Fungal endophytes were isolated from weedy rice plants and grasses from South Korea and the USA, respectively. Endophytes (Curvularia brachyspora and Fusarium asiaticum) from weedy rice plants from high salt or drought stressed habitats in South Korea conferred salt and drought stress tolerance to weedy rice and commercial varieties reflective of the habitats from which they were isolated. Fungal endophytes isolated from grasses in arid habitats of the USA were identified as Trichoderma harzianum and conferred drought and heat stress tolerance to monocots and eudicots. Two T. harzianum isolates were exposed to UV mutagenesis to derive strains resistant to fungicides in seed treatment plant protection packages. Three strains that collectively had resistance to commonly used fungicides were used for field testing. The three-strain mixture (ThSM3a) increased crop yields proportionally to the level of stress plants experienced with average yields up to 52% under high and 3–5% in low stress conditions. This study demonstrates fungal endophytes can be developed as viable commercial tools for rapidly generating climate resilient crops to enhance agricultural sustainability.

Use of fungal endophytes to increase cucurbit plant performance by conferring abiotic and biotic stress tolerance

2014 ◽  
Author(s):  
Stanley Freeman ◽  
Russell Rodriguez ◽  
Adel Al-Abed ◽  
Roni Cohen ◽  
David Ezra ◽  
...  
Keyword(s):  
Stress Tolerance ◽  
Fungal Pathogens ◽  
Systems Approach ◽  
Crop Yields ◽  
Fungal Endophytes ◽  
Limited Resource ◽  
Pathogenic Fungi ◽  
Plant Performance ◽  
Crop Species ◽  
Desert Areas

Major threats to agricultural sustainability in the 21st century are drought, increasing temperatures, soil salinity and soilborne pathogens, all of which are being exacerbated by climate change and pesticide abolition and are burning issues related to agriculture in the Middle East. We have found that Class 2 fungal endophytes adapt native plants to environmental stresses (drought, heat and salt) in a habitat-specific manner, and that these endophytes can confer stress tolerance to genetically distant monocot and eudicot hosts. In the past, we generated a uv non-pathogenic endophytic mutant of Colletotrichum magna (path-1) that colonized cucurbits, induced drought tolerance and enhanced growth, and protected 85% - 100% against disease caused by certain pathogenic fungi. We propose: 1) utilizing path-1 and additional endophtyic microorganisms to be isolated from stress-tolerant local, wild cucurbit watermelon, Citrulluscolocynthis, growing in the Dead Sea and Arava desert areas, 2) generate abiotic and biotic tolerant melon crop plants, colonized by the isolated endophytes, to increase crop yields under extreme environmental conditions such as salinity, heat and drought stress, 3) manage soilborne fungal pathogens affecting curubit crop species growing in the desert areas. This is a unique and novel "systems" approach that has the potential to utilize natural plant adaptation for agricultural development. We envisage that endophyte-colonized melons will eventually be used to overcome damages caused by soilborne diseases and also for cultivation of this crop, under stress conditions, utilizing treated waste water, thus dealing with the limited resource of fresh water.

Neurosurgical activity during COVID-19 pandemic: an experts' opinion from China, South Korea, Italy, the USA, Colombia, and the UK

2020 ◽  
Vol 64 (4) ◽  
Author(s):  
Marco M. Fontanella ◽  
Giorgio Saraceno ◽  
Ting Lei ◽  
Joshua B. Bederson ◽  
Namkyu You ◽  
...  
Keyword(s):  
South Korea ◽  
The Usa ◽  
The Uk

ISSUES OF GREENING THE LAND USE SYSTEM IN THE RUSSIAN FEDERATION

2020 ◽  
Keyword(s):  
Crop Rotation ◽  
Crop Yields ◽  
Plant Protection ◽  
Arable Land ◽  
Farming System ◽  
Perennial Grasses ◽  
Soil Protection ◽  
Anthropogenic Pressure ◽  
Strict Adherence ◽  
The Creation

Soil protection in agrolandscapes is especially necessary in conditions of intensification of production and increasing anthropogenic pressure on them. This complex should fit into the landscape farming system. The more intensive the load on the land in the farm, the higher the level of soil protection against destruction. The article notes that raising soil fertility, increasing crop yields and ecological environmental improvement are possible only on the basis of agrolandscape farming system, which allows to establish the correct ratio of arable land, meadows and forests. The transition to such a system of agriculture requires: development of a project for agrolandscape land management with a set of anti-erosion measures for each farm; adjusting the structure of sown areas taking into account market conditions, that is, increasing the area of productive crops in demand (winter and spring wheat, perennial grasses), which in combination with occupied and green manure pairs determine the structure of biologized crop rotation; widespread use of legumes (peas, vetch) as factors in the biologization of agriculture. The efficiency of expanding the area of perennial grasses to 25 % of arable land in some areas of the Non-Chernozem region and the Belgorod region is shown. Here, techniques that increase the efficiency of arable land are based on strict adherence to crop rotation with legumes, the use of adaptive varieties, and the use of biologized fertilizer and plant protection systems. It is noted that the creation of a system of shelterbelts makes it possible to reduce the cost of planting and growing them in comparison with single forest belts and what is very important for farmers is to sharply increase the return on their exploitation in the form of increased increases in crop yields. The creation of forest-sized landscapes will improve the environmental conditions for the cultivation of crops.

scholarly journals OsNAC45 is Involved in ABA Response and Salt Tolerance in Rice

Rice ◽  
2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Xiang Zhang ◽  
Yan Long ◽  
Jingjing Huang ◽  
Jixing Xia
Keyword(s):  
Transcription Factors ◽  
Salt Stress ◽  
Salt Tolerance ◽  
Stress Responses ◽  
Crop Yields ◽  
Plant Stress ◽  
Root Cells ◽  
Nac Transcription Factors ◽  
Rice Plants ◽  
Plant Stress Responses

Abstract Background Salt stress threatens crop yields all over the world. Many NAC transcription factors have been reported to be involved in different abiotic stress responses, but it remains unclear how loss of these transcription factors alters the transcriptomes of plants. Previous reports have demonstrated that overexpression of OsNAC45 enhances salt and drought tolerance in rice, and that OsNAC45 may regulate the expression of two specific genes, OsPM1 and OsLEA3–1. Results Here, we found that ABA repressed, and NaCl promoted, the expression of OsNAC45 in roots. Immunostaining showed that OsNAC45 was localized in all root cells and was mainly expressed in the stele. Loss of OsNAC45 decreased the sensitivity of rice plants to ABA and over-expressing this gene had the opposite effect, which demonstrated that OsNAC45 played an important role during ABA signal responses. Knockout of OsNAC45 also resulted in more ROS accumulation in roots and increased sensitivity of rice to salt stress. Transcriptome sequencing assay found that thousands of genes were differently expressed in OsNAC45-knockout plants. Most of the down-regulated genes participated in plant stress responses. Quantitative real time RT-PCR suggested that seven genes may be regulated by OsNAC45 including OsCYP89G1, OsDREB1F, OsEREBP2, OsERF104, OsPM1, OsSAMDC2, and OsSIK1. Conclusions These results indicate that OsNAC45 plays vital roles in ABA signal responses and salt tolerance in rice. Further characterization of this gene may help us understand ABA signal pathway and breed rice plants that are more tolerant to salt stress.

Mathematical modeling the epicenters of coronavirus disease-2019 (COVID-19) pandemic

2020 ◽  
Vol 9 (s1) ◽  
Author(s):  
Babak Jamshidi ◽  
Mansour Rezaei ◽  
Shahriar Jamshidi Zargaran ◽  
Farid Najafi
Keyword(s):  
Mathematical Modeling ◽  
South Korea ◽  
The Usa

AbstractIn epidemiology, the modeling of epicenters is important both conceptually and mathematically. This paper is an attempt to model epicenters mathematically. We present an algorithm to find new epicenters. Applying our model for the data related to COVID-19 pandemic, we obtain epicenters in China, South Korea, Iran, Italy, France, Germany, Spain, the USA, and Switzerland, on the days 1, 35, 42, 42, 49, 50, 50, 50, and 56, respectively. Although the number of these epicenters is less than 5% of all contaminated countries across the globe, as of March 22, 2020, they make up 74% of new cases and over 80% of total confirmed cases. Finally, we conclude that we expect to face three new epicenters between March 22 and April 1, 2020.

Current Status and Future Prospects for Harvesting and Resource Management of the Agarophyte in Japan

1976 ◽  
Vol 33 (4) ◽  
pp. 1024-1030 ◽  
Author(s):  
Nobuo Yamada
Keyword(s):  
Resource Management ◽  
South Korea ◽  
Conservation Management ◽  
Resource Conservation ◽  
Current Status ◽  
Future Prospects ◽  
Annual Output ◽  
The Usa

Agar-agar manufacturing was Japan’s monopoly for about 300 yr from 1644 until about 1920, when its production was initiated in the USA by introducing techniques from Japan, and then was begun in South Korea, Indonesia, and many other countries. Today the average annual output of agar-agar of over 20 countries amounts to 6000 tons, half of which is produced in Japan.Agarophytes are harvested in many countries and traded among them. In Japan, nearly 14,000 tons are consumed in a year, two thirds of which are imported from about 20 countries.Under these circumstances, there is a worldwide demand for appropriate measures for resource conservation, effective harvesting, and utilization of agarophytes.This paper presents the results of basic and applied investigations on the agarophytes and the existing state of harvesting and resource-conservation management in Japan.

scholarly journals Analyses of clinical outcomes after severe pelvic fractures: an international study

2018 ◽  
Vol 3 (1) ◽  
pp. e000238 ◽  
Author(s):  
Kyoungwon Jung ◽  
Shokei Matsumoto ◽  
Alan Smith ◽  
Kyungjin Hwang ◽  
John Cook-Jong Lee ◽  
...  
Keyword(s):  
Mortality Rate ◽  
South Korea ◽  
Trauma Center ◽  
Data Bank ◽  
Pelvic Fractures ◽  
Older Age ◽  
Inhospital Mortality ◽  
Cox Regression Analysis ◽  
Factors Associated ◽  
The Usa

BackgroundThis study aimed to compare treatment outcomes between patients with severe pelvic fractures treated at a representative trauma center that was established in Korea since 2015 and matched cases treated in the USA.MethodsTwo cohorts were selected from a single institution trauma database in South Korea (Ajou Trauma Data Bank (ATDB)) and the National Trauma Data Bank (NTDB) in the USA. Adult blunt trauma patients with a pelvic Abbreviated Injury Scale >3 were included. Patients were matched based on covariates that affect mortality rate using a 1:1 propensity score matching (PSM) approach. We compared differences in outcomes between the two groups, performed survival analysis for the cohort after PSM and identified factors associated with mortality. Lastly, we analyzed factors related to outcomes in the ATDB dataset comparing a period prior to the implementation of the trauma center according to US standards, an interim period and a postimplementation period.ResultsAfter PSM, a total of 320 patients (160 in each cohort) were identified for comparison. Inhospital mortality was significantly higher in the ATDB cohort using χ2 test, but it was not statistically significant when using Kaplan-Meier survival curves and Cox regression analysis. Moreover, the mortality rate was similar comparing the NTDB cohort to ATDB data reflecting the post-trauma center establishment period. Older age, lower systolic blood pressure (SBP) and Glasgow Coma Scale (GCS) at admission were factors associated with mortality.DiscussionMortality rate after severe pelvic fractures was significantly associated with older age, lower SBP and GCS scores at admission. Efforts to establish a trauma center in South Korea led to improvement in outcomes, which are comparable to those in US centers.Level of evidenceLevel IV.

International perspectives on English teaching

2015 ◽  
Vol 14 (1) ◽  
pp. 2-17 ◽  
Author(s):  
Terry Locke
Keyword(s):  
Social Justice ◽  
South Korea ◽  
Educational Research ◽  
Design Methodology ◽  
Teaching Practice ◽  
Content Type ◽  
English Teaching ◽  
International Perspectives ◽  
The Usa ◽  
The University

Purpose – The purpose of this paper is to offer a personalised overview of the content of English Teaching: Practice and Critique for the years it was hosted at the Wilf Malcolm Institute for Educational Research (WMIER) at the University of Waikato (2002-2014). Design/methodology/approach – It notes trends in relationship to the context of origin of 335 articles published in this period (excluding editorials), including significant increases in articles originating in the USA and Pacific Rim Asian nations, particularly South Korea and Taiwan. It comments on articles that relate to the original vision of the editors’ founders, especially their emphasis on practice, criticality and social justice. Findings – Prevailing themes across 13 years are mapped and in some cases discussed. Originality/value – A number of reflections are shared in relation to the future of the journal and some challenges currently facing subject English.

scholarly journals ESports: a Review of Foreign and Russian Media Resources

2021 ◽  
Vol 26 (2) ◽  
pp. 325-330
Author(s):  
Alina G. Chernyavskaya
Keyword(s):  
South Korea ◽  
Internet Resources ◽  
The World ◽  
The Usa ◽  
Russian Media ◽  
Video Format ◽  
Resources Development ◽  
Media Market

Millions of people all over the world watch ESports matches and follow the news about favourite teams and players. Due to the COVID-19 pandemic ESports market has received unprecedented growth of audience. The present paper is aimed at exploring and comparing specific features of ESports internet resources development around the world. The author observes the most visited ESports sites in such countries as South Korea, China, the USA, and Russia. Also, this article examines website traffic statistics to analyze the popularity of ESports internet resources among an audience. The data is based on the number of views and visitors for each country during the day, month, and year. The study showed that the Asian ESports media market prefers to use video format for providing content compared to the USA and Russia. The USA and Russia still use text and video formats.

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