Present study illustrates the role of Fusarium oxysporum ciceri Race1 (Foc1) induced redox responsive transcripts in regulating. Abstract. Based on the differential reaction of 10 chickpea cultivars to pathogenic isolates of Fusarium oxysporum f. sp. ciceri, the existence of at. About ha are sown annually to chickpea (Cicer arietinum L.) in Andalucia, southern Spain, approximately 66% of the total national acreage of the crop.

Author: Voodoogami Doushura
Country: Morocco
Language: English (Spanish)
Genre: Sex
Published (Last): 16 December 2011
Pages: 128
PDF File Size: 8.36 Mb
ePub File Size: 13.93 Mb
ISBN: 470-5-72194-411-2
Downloads: 33526
Price: Free* [*Free Regsitration Required]
Uploader: Akile

I—Lwhereas WR plants showed uniform cell layers as uninfected controls Fig. Data Availability All relevant data are within the paper and its Supporting Information files.

Mapping gusarium done manually to minimize the number of evolutionary events and to infer the two simplest scenarios: Each reaction contained 30 ng DNA, 0.

Plant Disease | Races of Fusarium oxysporum f. sp. ciceri

The present study validated the expression of these genes [ 7 ] using qRT-PCR over a wider range of duration, from 0 hpi to 28 dpi. This cladistic analysis produced trees with branching pattern similar to that obtained with the phenetic UPGMA analysis; pathogenic isolates grouped together in a clade with high bootstrap support and they were clearly delineated from isolates nonpathogenic to chickpea.

Based on this, four distinct phases of fungal proliferation can be put forth. Earlier reports had suggested wound mediated pathogen invasion and HR at the site of infection [32]. Novel aspects of tomato root colonization and infection by Fusarium oxysporum f. Saitou N, Nei M The neighbor-joining method: A comparison of the pectate lyase genes, pel-1 ocysporum pel-2, of Colletotrichum gloeosporioides f.

Lipid peroxidation assays also indicated fungal induced membrane injury. Amongst several wilt causing races of Fusarium oxysporum f. Biochemical and immunoblot assays showed dissimilar results, probably due to different substrate identities for MDA—TBA and MDA—protein conjugates in biochemical and immunoblot experiments, respectively. Metabolic profiling of chickpea- Fusarium interaction identifies differential modulation of disease resistance pathways.

It suggests that wilting race 1A could be the common ancestor of all races Fig. This is an open access article distributed under gaces terms of the Creative Commons Attribution Licensewhich permits unrestricted use, distribution, and oxsporum in any medium, provided the original author and source are credited.


In ascomycetes, to which teleomorphic stages oxgsporum Fusarium belong, vegetative compatibility is homogenic in a fusariym of incompatibility loci designated vic or v-cso that strains in the same VCG carry the same alleles at all vic loci [23].

Tissue sectioning, fixation, and dehydration likely led to membrane injury resulting in abnormal stain uptake even by uninduced samples.

Funding Statement This work was supported by Grant Number: RBOH, a positive regulator of hypersensitive response and cell death, was also found to act as an indirect regulator of cell cycle through TRX3 connections and of defense response through OCP3 links.

Quantitative and microscopic assessment of compatible and incompatible interactions between chickpea cultivars and Fusarium oxysporum f.

In contrast, ROS generation adds to host phytotoxicity and hence is often found to be tightly regulated and detoxified through efficient scavenging systems in some resistant hosts.

Network showing interaction between sugar metabolizers and redox regulators. The presence of microconidia both singly and in clusters inside the xylem vessel indicated stable establishment of the fungus within the susceptible host Fig. Frp1 is a Fusarium oxysporum F-box protein required for pathogenicity on tomato. Our results are in accordance with the study depicting abundant expression of PL gene early in the infection process and required for full virulence in Alternaria brassicicola [ 62 ].

Further, the appearance of wilting symptoms in JGI was marked with heavy colonization of lower, middle and upper root zones along with the lower stem region at 10—12 dpi Fig 2D. In uninduced root cells, the cell size and nuclear position appeared to be normal Fig. A—C correspond to root sections of uninduced plants. National Center for Biotechnology InformationU.

Several redox-responsive transcripts, cellular transporters, TFs, and sugar-metabolizing ESTs identified in the chickpea— Fusarium case study [27][29] were subjected to BLAST analyses, their Arabidopsis homologous genes identified and used as inputs for network generation using Pathway Studio Software version7.

Introduction Chickpea Cicer arietinum L.

A MAP kinase of the vascular wilt fungus Fusarium oxysporum is essential for root penetration and pathogenesis. Our results suggest that the pathogen colonizes the susceptible cultivar defeating its defense; however, albeit its entry in the resistant plant, further proliferation is severely restricted providing an evidence of efficient defense mechanism in the resistant chickpea cultivar.


The plants were lightly watered using autoclaved tap water every 2—3 days. Root tips of tap root and lateral roots were cut and the entire root system was dipped in spore suspension for 5 min. Interestingly, in the present study, assays indicating membrane damage showed cell shrinkage and gradual nuclear adpression in response to pathogen progression in both compatible as well as incompatible host cells, with the degree of nuclear adpression being marginally lower in the resistant host.

These oxysporjm candidates also showed interactions with differentially expressed redox responsive candidates, cellular transporters, and transcription factors analyzed in the present study. Soluble sugars, sucrosyl oligosaccharides, and fructans have also been reported to contribute to oxidative stress regulation and ROS detoxification [23].

Races of Fusarium oxysporum f. sp. ciceri

Curr Opin Plant Biol. OCP3 appeared as negative regulator of infection response, while FRO7 positively regulated iron homeostasis and photosynthesis. In DVI, it was elevated at later stages reaching the maxima at 28 dpi.

The five eGFP transformed Foc isolates did not show any altered phenotypic or virulence characteristics compared to the wild type; however, variation in GFP fluorescence was observed.

Races of Fusarium oxysporum ciceri in Andalucia, southern Spain

However, understanding the role of this factor in the present study requires additional experimentation. Two types of tissues were collected: Glucose levels showed alterations with an increase at 5dpi, which was met with an abrupt reduction at 7dpi in JG62 plants Fig. f.sp.cicrri

Another CWDE, PL was found to express at three time-points covering initial invasion and colonization, invasion from cortical cells to xylem and necrotic phases. However, substantial colonization of vascular region was thereafter observed in lower and middle root zone of only JGI at 8 dpi Fig 2C. Special thanks are reserved for Mr. VSR1, found fusarikm regulator of vacuolar transport, was linked to auxin responsive transcription factor ARF.

Relative expression of beta 1,3 endo glucanase in susceptible JG62 and resistant WR roots of chickpea plants in response to Foc1 infection.

Author: admin