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New Pima Cottons Fight Fusarium Fungus

Published: March 5, 2008
Source : USDA Agricultural Research Service
Some of your favorite clothes, towels and sheets might be made with cotton, America's best-selling fabric. But cotton plants won't produce top yields of the fluffy white bolls if they're clobbered by a microbe known as FOV race 4, short for Fusarium oxysporum f.sp. vasinfectum.

Now, studies by Agricultural Research Service (ARS) scientist Mauricio Ulloa and cooperators may lead to new ways to combat the disease.

The Fusarium fungus can clog a plant's vascular system, or "plumbing," according to Ulloa. He's a geneticist at the ARS Western Integrated Cropping Systems Research Unit in Shafter, Calif.

Already, Ulloa, ARS colleague Richard Percy at College Station, Texas, and Michael Davis and Robert Hutmacher of the University of California have developed four new kinds of Fusarium-resistant pima cotton plants. Pima cotton makes premium fabrics for clothing and home.

The scientists will offer these parent pimas, known as SJ-07P-FR01 through -FR04, to cotton breeders and researchers this year. The plants rank as the first publicly owned pimas that have good resistance to race 4; good-to-superior fiber length, which is important to fabric quality; and moderate yields, according to Ulloa.

Now the scientists are testing hundreds of upland cotton plants. Upland cotton offers excellent, less expensive fibers. And, in related studies, Ulloa and co-investigators are delving more deeply into cotton's genetic makeup.

The intent? To find markers—genetic material that indicates the presence of genes of potential interest. The scientists have already identified a significant number of markers that may prove to be indicators of Fusarium resistance.
Source
USDA Agricultural Research Service
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Dr.kedar Karki
Dr.kedar Karki
12 de marzo de 2008
ASSESSMENT OF THE PATHOGENICITY PROPERTY OF FUSARIUM GRAMINEARUM 1 IN BALB/C MICE Kedar B. Karki and Gemerlyn G. Garcia2 Abstract An experiment was conducted to investigate the immunologic property, pathogenicity and treatment of Fusarium graminearum infection. Several groups of mice were randomly selected for the following groups: (PC, T1 and T2 were groups of mice that respectively received a 1:1, 1:100 and 1:100,000 fungal dilution while T3, T4, and T5 were groups of mice that respectively received the same concentration but each were treated with Diethylamine Acetarsol (Acetylarsan). A group of mice was included as a negative control (NC). In vitro assays were used to examine the ability of F. graminearum to produce enzymes, which are thought as important virulence indicators. Results revealed the ability of the pathogen to produce collagenase and elastase. In addition, histopathological examination indicated vascular congestion and mild triaditis of the liver. Pulmonary congestion and lymphoid hyperplasia in the spleen were noted. The fungi were recovered from the liver, lungs, spleen and skin of the legs of some experimental animals. Likewise, increase in weight of the spleen doubled as early as the second week (from 49 mg to 80 mg) and progressed up to the fourth week (125 mg) where it tapered off in the untreated group. Similar increase in the weight of the spleen was observed in the treated group (40 mg to 64 mg) but not as great as that in the untreated group (105 mg). Hematological findings showed a lymphocytic count of 1.83 that increased to 3.356, monocyte count of 0.47 that increased to 0.981 and neutrophils increased from 0.399 to 1.698 in untreated groups. Lymphocyte count in the treated group was increased from 1.8 to 3.64, monocytes increased from 0.068 to 0.325 and neutrophils increased from 0.223 to 1.056. High incidence of death was observed in animals that did not receive treatment (PC, T1, and T2) while relatively lower death incidences were exhibited by groups that received diethylamine acetarsol (T3, T4 and T5). 1 A Masteral thesis by the senor author submitted to the Institute of Graduate Studies, Central Luzon State University, Graduate student Science City of Muñoz, Nueva Ecija 2 Assistant professor Microbiology and Chairman Institute of Graduate Studies faculty of veterinary.
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Dr.kedar Karki
Dr.kedar Karki
12 de marzo de 2008
ASSESSMENT OF THE IMMUNOLOGIC PROPERTY OF Fusarium graminearium in Balb/CMice. Kedar B.Karki.1 Principle Investigator, College of Veterinary Medicine and Surgery C.L.U.S. Gemerlyn G. Garcia.2 College of Veterinary Medicine and Surgery .Institute of Graduate Study C.L.U.S. The Philippines. ABSTRACT An experiment was conducted to investigate the immunologic property of Fusarium graminearum infection. Several groups of mice were randomly selected for the following groups:(PC, T1and T2 were groups of mice that respectively received a 1:1, 1:100 and 1:100,000 fungal dilution while T3, T4, and T5 were groups of mice that respectively received the same concentration but each were treated with Diethyl amine Acetarsol (Acetylarsan). A group of mice was included as a negative control (NC). Increase in weight of the spleen doubled as early as the second week (from 49 mg to 80 mg) and progressed up to the fourth week (125 mg) where it tapered off in the untreated group. Similar increase in the weight of the spleen was observed in the treated group mg to 64 mg) but not as great as that in the untreated group (105 mg). Hematological findings showed a lymphocyte count of 1.83 that increased to 3.356, monocyte count of 0.47 that increased to 0.981 and neutrophils increased from 0.399 to 1.698 in untreated groups. Lymphocyte count in the treated group was increased from 1.8 to 3.64, monocytes increased from 0.068 to 0.325 and neutrophils increased from 0.223 to 1.056. High incidence of death was observed in animals that did not receive treatment (PC, T1, and T2) while relatively lower death incidences were exhibited by groups that received diethyl amine acetarsol (T3, T4 and T5).Precipitin test showed that F. graminearum stimulated antibody production in untreated groups detected only from the third to the sixth week post-infection. This was significantly different (P 0.01) from the higher detection levels of antibody production elicited in treated groups which persisted from the second week sustaining peaks until the sixth week of observation. These findings suggest that F. graminearum is a pathogenic fungi which can elicit immunity and can be treated with DiethyIamine Acetarsol and its derivities.
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Amália Pires Peito
Amália Pires Peito
7 de marzo de 2008
Fusarium oxysporum is a big problem also in packed foods. How can I detect this fungi when it is vestigial in packages juices? Thanks. Amália
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Raducanu Florentina
Raducanu Florentina
7 de marzo de 2008
This paper is very interesting for me. It is cool. Florentina Raducanu ROMANIA
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Dr.kedar Karki
Dr.kedar Karki
7 de marzo de 2008
Thanx for information. As in my master in vet science study I found this fungus changes the elastin and colagene fiber in respective enzyme.
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