scholarly journals Antagonistic Activity of Pseudomonas Fluorescens Against Fusarium Oxysporum f. sp. Nievum Isolated from Soil Samples in Palestine

2017 ◽  
Vol 6 (2) ◽  
pp. 1 ◽  
Author(s):  
Mazen Salman ◽  
Nabil Shahin ◽  
Nawaf Abu-Khalaf ◽  
Mohammad Jawabrih ◽  
Basima Abu Rumaileh ◽  
...  
Keyword(s):  
Fusarium Oxysporum ◽  
Pseudomonas Fluorescens ◽  
Field Experiments ◽  
Antagonistic Activity ◽  
Arab Countries ◽  
Local Market ◽  
Control Mechanisms ◽  
The Past ◽  
Normal Seedling ◽  
Severe Infections

Watermelon is an important summer crop in Palestine, for several decades filling the needs of local market and some Arab countries. The yield of watermelon decreased dramatically in recent years due to severe infections with the soil borne fungal pathogen Fusarium oxysporum f. sp. niveum (FON). Soil fumigation with methyl bromide was commonly applied by Palestinian farmers until it was recently legally banned. Different control mechanisms were not feasible to overcome problems caused by the disease resulting in decreased watermelon cultivation in Palestine for the past 30 years. In this work, we have experimentally shown that Pseudomonas fluorescens was efficient in controlling FON infection and allowing normal seedling growth of both the root and shoot systems. Field experiments are necessary to further confirm the efficacy of biocontrol application.

scholarly journals In Vitro Inhibition of Cellulolytic Enzymes of Fusarium Oxysporum by Trichoderma spp and Pseudomonas Fluorescens on Arachis Hypogaea L

2015 ◽  
Vol 3 (1) ◽  
pp. 106-110
Author(s):  
P. Rajeswari
Keyword(s):  
Fusarium Oxysporum ◽  
Pseudomonas Fluorescens ◽  
Arachis Hypogaea ◽  
Fusarium Wilt ◽  
Trichoderma Viride ◽  
Antagonistic Activity ◽  
Cellulolytic Enzymes ◽  
Trichoderma Spp ◽  
In Vitro Inhibition

In an attempt to develop biocontrol system for management of Fusarium wilt in groundnut, Trichoderma viride, Trichoderma harzianum,and Pseudomonas fluorescens were evaluated for their antagonistic activity against Fusarium oxysporum in vitro. .Fusarium wilt diseasescaused by the fungus Fusarium oxysporum lead to significant yield losses of crops. Experiments were conducted on the effect of culture filtratesof T.viride (1%), T. harzianum (1.5%), and P. fluorescens (2%) on the in vitro inhibition of cellulolytic enzymes of Fusarium oxysporum. Theactivity of 1,4 endoglucanases, 1,4exoglucanase Cellobiase produced by Fusariumoxysporum was higher, when compared to control.Maximum inhibition of above Cellulolytic enzymes (1, 4 endoglucanases, 1,4exoglucanase, Cellobiase) was shown by T. viride treatment wasfollowed by T. harzianum and P. fluorescens. Of all the treatments, T. viride treatment showed higher rate of inhibition of Cellulolytic enzymesof Fusarium oxysporum followed by that of T. harzianum and P. fluorescens.This present study indicates that culture filtrate of T.viride(1%)is the best biocontrol agent in the inhibition of Fusarium oxysporum causing Fusarium wilt of Arachis hypogaea .LDOI: http://dx.doi.org/10.3126/ijasbt.v3i1.12138    Int J Appl Sci Biotechnol, Vol. 3(1): 106-110 

Five Years and Count(er)ing: Memoir after Memoir

CounterText ◽  
2020 ◽  
Vol 6 (1) ◽  
pp. 26-32
Author(s):  
Norbert Bugeja
Keyword(s):  
Guest Editor ◽  
Arab Countries ◽  
National Museum ◽  
Terror Attack ◽  
Special Issue ◽  
The Past ◽  
Personal Perspectives ◽  
The Moment ◽  
Ongoing Project

In this retrospective piece, the Guest Editor of the first number of CounterText (a special issue titled Postcolonial Springs) looks back at the past five years from various scholarly and personal perspectives. He places particular focus on an event that took place mid-way between the 2011 uprisings across a number of Arab countries and the moment of writing: the March 2015 terror attack on the Bardo National Museum in Tunis, which killed twenty-two people and had a profound effect on Tunisian popular consciousness and that of the post-2011 Arab nations. In this context, the author argues for a renewed perspective on memoir as at once a memorial practice and a political gesture in writing, one that exceeds concerns of genre and form to encompass an ongoing project of political re-cognition following events that continue to remap the agenda for the region. The piece makes a brief final pitch for Europe's need to re-cognise, within those modes of ‘articulacy-in-difficulty’ active on its southern borders, specific answers to its own present quandaries.

New and modern history of the Arab world

2019 ◽  
Author(s):  
Rouben Karapetyan
Keyword(s):  
International Relations ◽  
Historical Development ◽  
Arab World ◽  
Arab Countries ◽  
Modern History ◽  
The Past ◽  
Wide Range ◽  
History Of ◽  
Key Issues ◽  
Oriental Studies

The textbook covers the main events and developments in the recent history of the Arab world. The key issues of the past and present of the major Arab countries are examined. The general patterns, main stages and peculiarities of the historical development of these countries are presented. The work is designed for students of the faculties of “Oriental Studies”, “History” and “International Relations”, as well as wide range of readers interested in the history of the Arab world.

scholarly journals Consumer Preferences for Oyster Attributes: Field Experiments on Brand, Locality, and Growing Method

2017 ◽  
Vol 46 (2) ◽  
pp. 315-337 ◽  
Author(s):  
Maik Kecinski ◽  
Kent D. Messer ◽  
Lauren Knapp ◽  
Yosef Shirazi
Keyword(s):  
United States ◽  
Field Experiments ◽  
Consumer Preferences ◽  
Revealed Preference ◽  
The United States ◽  
Dichotomous Choice ◽  
Production Methods ◽  
The Past ◽  
Oyster Aquaculture ◽  
First Time

Oyster aquaculture has experienced tremendous growth in the United States over the past decade, but little is known about consumer preferences for oysters. This study analyzed preferences for oysters with varied combinations of brands, production locations, and production methods (aquaculture vs. wild-caught) using dichotomous choice, revealed preference economic field experiments. Results suggest significant and distinct differences in behavior between first-time and regular oyster consumers. While infrequent oyster consumers were drawn to oysters labeled as wild-caught, experienced oyster consumers preferred oysters raised via aquaculture. These findings will be valuable for growers and policymakers who invest in aquaculture to improve surrounding ecosystems.

scholarly journals Antagonistic activity of Pseudomonas fluorescens isolates against Colletotrichum capsici

2019 ◽  
Vol 7 (4) ◽  
pp. 621-626
Author(s):  
Thaveedu, S. ◽  
Sutha Raja kumar, R., ◽  
Darwin Christdhas Henry, L. ◽  
Jaiganesh, V. ◽  
Kannan, C.
Keyword(s):  
Pseudomonas Fluorescens ◽  
Antagonistic Activity ◽  
Colletotrichum Capsici

scholarly journals Effect of three composts with active ingredients of Pseudomonas fluorescens on the development of white root disease and production of rubber plants

2021 ◽  
Vol 22 (8) ◽  
Author(s):  
NURHAYATI DAMIRI ◽  
RIZAL ROFIQI ◽  
MULAWARMAN MULAWARMAN ◽  
SUPLI E. RAHIM ◽  
TRI RAPANI FEBYANTI
Keyword(s):  
Pseudomonas Fluorescens ◽  
Active Ingredient ◽  
Root Disease ◽  
Biological Agent ◽  
The Other ◽  
Active Ingredients ◽  
Severe Infections ◽  
Rigidoporus Lignosus ◽  
The Impact ◽  
Latex Production

Abstract. Damiri N, Rofiqi R, Mulawarnam, Rahim SE, Febyanti TP. 2021. Effect of three composts with active ingredients of Pseudomonas fluorescens on the development of white root disease and production of rubber plants. Biodiversitas 22: 3237-3242. White root disease (WRD) caused by Rigidoporus lignosus is a very dangerous disease and a scourge for rubber farmers because it can result in decreased production and kill rubber plants. This research was conducted to observe the impact of compost enriched with the biological agent Pseudomonas fluorescens on the development of white root disease and production in rubber plants. The results showed that the application of compost with active ingredient of P. fluorescens isolates A and B reduced the severity of white root disease in plants with mild, moderate and severe infections, 34.12%, 29.31% and 57.21% respectively. Application of compost with P. fluorescens isolates A and B, either singly or in combination, can increase latex production. The treatment of giving compost enriched with P. fluorescens isolates AR and ABR on rubber plants infected with mild WRD resulted in the highest latex production of 406 gm and 402.74 gm per plant, respectively. These two treatments did not differ from each other but were significantly different from the other treatments and controls.

scholarly journals The sss Colonization Gene of the Tomato-Fusarium oxysporum f. sp. radicis-lycopersici Biocontrol Strain Pseudomonas fluorescens WCS365 Can Improve Root Colonization of Other Wild-type Pseudomonas spp. Bacteria

2000 ◽  
Vol 13 (11) ◽  
pp. 1177-1183 ◽  
Author(s):  
Linda C. Dekkers ◽  
Ine H. M. Mulders ◽  
Claartje C. Phoelich ◽  
Thomas F. C. Chin-A-Woeng ◽  
André H. M. Wijfjes ◽  
...  
Keyword(s):  
Fusarium Oxysporum ◽  
Pseudomonas Fluorescens ◽  
Pathogenic Fungus ◽  
Cell Types ◽  
Disease Suppression ◽  
Systemic Resistance ◽  
Root Tip ◽  
Wild Type ◽  
Tomato Root ◽  
Colonization Ability

We show that the disease tomato foot and root rot caused by the pathogenic fungus Fusarium oxysporum f. sp. radicis-lycopersici can be controlled by inoculation of seeds with cells of the efficient root colonizer Pseudomonas fluorescens WCS365, indicating that strain WCS365 is a bio-control strain. The mechanism for disease suppression most likely is induced systemic resistance. P. fluorescens strain WCS365 and P. chlororaphis strain PCL1391, which acts through the production of the antibiotic phenazine-1-carboxamide, were differentially labeled using genes encoding autofluorescent proteins. Inoculation of seeds with a 1:1 mixture of these strains showed that, at the upper part of the root, the two cell types were present as microcolonies of either one or both cell types. Microcolonies at the lower root part were predominantly of one cell type. Mixed inoculation tended to improve biocontrol in comparison with single inoculations. In contrast to what was observed previously for strain PCL1391, mutations in various colonization genes, including sss, did not consistently decrease the biocontrol ability of strain WCS365. Multiple copies of the sss colonization gene in WCS365 improved neither colonization nor biocontrol by this strain. However, introduction of the sss-containing DNA fragment into the poor colonizer P. fluorescens WCS307 and into the good colonizer P. fluorescens F113 increased the competitive tomato root tip colonization ability of the latter strains 16- to 40-fold and 8- to 16-fold, respectively. These results show that improvement of the colonization ability of wild-type Pseudomonas strains by genetic engineering is a realistic goal.

Jaziret Fadel

2021 ◽  
pp. 104-126
Author(s):  
Amal Adel Abdrabo
Keyword(s):  
Social Life ◽  
Arab Countries ◽  
Ethnographic Study ◽  
Point Of View ◽  
Mutual Interaction ◽  
The Past ◽  
The Social ◽  
Preliminary Research ◽  
The Village ◽  
Key Questions

The plight of refugees fleeing from Palestine in 1948 raises several key questions regarding their historical fragmentation as a nation and their future. From a social anthropological point of view, the existing literature seems to tackle the Palestinian case from different perspectives influenced by the mass exodus of Palestinians from their homeland. Such perceptions took for granted the recognition of the state of “refugeeness” of the exiled Palestinians around the globe, while, in reality, it is a mutual interaction between people, place, and time. In the aftermath of the Arab-Israeli War at the beginning of the year 1948, more than 700,000 Palestinians fled their homes in Palestine to the nearby Arab countries, among them was Egypt. Some thousands settled in different areas all over Egypt. Based on a preliminary research on the literature, the author can argue that this is the first ethnographic study of the social life of the village of Jaziret Fadel and its Palestinian inhabitants in Egypt. The chapter is about tackling the historical trajectories, genealogies, memories, and present of the inhabitants of this village who seemed to be torn between two nostalgic pasts. The author's emphasis within this chapter is about how the narratives of the past memories could reveal a lot about the present time of the human societies and their future.

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