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:	Samushicage Garan
Country:	Chad
Language:	English (Spanish)
Genre:	Business
Published (Last):	16 May 2011
Pages:	472
PDF File Size:	19.3 Mb
ePub File Size:	15.79 Mb
ISBN:	512-2-27742-452-4
Downloads:	95054
Price:	Free* [*Free Regsitration Required]
Uploader:	Doujind

Races of Fusarium oxysporum f.sp. ciceri in Andalucia, southern Spain [1985]

Confocal scanning laser microscopic images highlighting Foc1 ramification and callose degradation products in chickpea roots. Thus, their expression in f.sp.ckceri stages in resistant plants suggests attempts of the fungus to acquire nutrients in growth limiting environment, where the fungus is present in minimal number owing to the strong defense response of the resistant host.

The present study showing enhanced amounts of HMG B like protein in resistant plants probably indicated similar stress regulatory oxysporun Fig. But, how their expression profiles altered with the gradual pathogen progression was elusive. At 12dpi, formation of mycelial network and clogging of xylem vessels with callose degraded products was noticed in susceptible plants Fig.

DOC Click here for additional data file. Surface colonization was followed by direct penetration of hyphae into epidermal cells without forming any specialized structures Fig 1B Inset. Considering all the illustrations and explanations, the interaction network generated from the transcriptomic profiling and pathway analyses was an attempt to delineate the probable defense signaling network found in chickpea as an outcome of Foc1 challenge Fig.

Table fsuarium Primer sequences specific to Fusarium oxysporum f. Expression of sucrose synthase increased at oxysporym time points in resistant WR plants while their levels increased significantly after 4dpi in susceptible JG62 plants.

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

Conversely, race 5 shows the lowest diversity in fingerprinting and RAPD haplotypes and is the most virulent of all races reported in the Mediterranean region [13,15,17]. MYB negatively regulated apoptosis, while REV positively regulated lignification, auxin mediated polar transport, growth, and cell f.sp.coceri.

Dave K, Punekar NS. Similar colonization patterns for Foc races 0 and 5 in r.sp.ciceri and incompatible interactions in chickpea have been reported earlier [ 27 ]. However, the susceptible plants showed a steady level of expression probably indicating cellular apoptosis by Foc1 infection. Fow2, a Zn II 2Cys6-type transcription regulator, controls plant infection of the vascular wilt fungus Fusarium oxysporum.

Fatty acids are known to play important roles in basal, effector-triggered and systemic immune responses [70]. A—C correspond to root sections of uninduced plants.

Conventional strategies, such as crop rotations, avoiding the fusarjum field to grow chickpea and the use of chemical fungicides are being used to manage the disease.

Cell shrinkage and gradual nuclear adpression appeared as interesting features marking fungal ingress. A—C corresponds to root sections of uninduced plants. S5Fig fusarlum Along with PG, PL has also been postulated to be involved in plant penetration and colonization by phytopathogens [ 61 ].

Eur J Plant Pathol. Eight races have been reported for Fusarium oxysporum f.

Recent report showed the progression and differential colonization pattern of Fusarium oxysporum f. Plant Signaling and Behavior 5: These colonies were serially transferred five times in the selection medium to confirm stability of transformation, growth and morphology.

Races of Fusarium oxysporum f. sp. ciceri

Network analysis Several redox-responsive transcripts, cellular transporters, TFs, fusqrium 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. Extracted proteins were used for immunoblot experiments. Confocal microscopic studies highlighted pathogen invasion and colonization accompanied by tissue damage and deposition of callose degraded products at the xylem vessels of infected roots of chickpea plants.

Additionally, the fuusarium of several candidate pathogen virulence genes was analyzed using quantitative reverse transcriptase PCR qRT-PCRwhich showed their characteristic expression in wilt-susceptible and resistant chickpea cultivars. Thus the gene mainly expressed during initial surface colonization and up to 2 dpi, when the fungus invades root cortex; and vascular region thereafter in JGI, as also observed by confocal microscopy.

Therefore, knowledge of the evolutionary history and potential of the pathogen population may help to optimize the management of disease-resistance genes, irrespective of the breeding strategy used for their development, ie.

Increased levels of prefoldin in susceptible plants probably indicated microtubule assembly which is thought to be an essential mechanism for cell repair.

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. Nonetheless, discerning the evolutionary pathways for pathogenic variation within F.