Histopathology of the interaction between Ascochyta fabae and Vicia faba: comparison of susceptible and resistant reactions

Maurin, N.; Gourret, J. P.; Tivoli, Bernard

doi:10.1051/agro:19931006

Cited by 14 publications

(11 citation statements)

References 9 publications

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“…Ascochyta fabae was found to develop intracellular hyphae in epidermal tissue of faba bean during the early stages of infection, suggesting an initial biotrophic phase (Maurin et al 1993). Similarly, Clulow et al (1991) observed a biotrophic phase lasting for about 48 h in pea epicotyls inoculated with M. pinodes.…”

Section: Type Of Parasitismmentioning

confidence: 90%

“…Subsequent colonization by A. pisi was characterized by an initial phase of subcuticular development followed by intercellular spread which resulted in the collapse and death of the host cells, beyond which no hyphae were detected (Brewer and MacNeill 1953;Heath and Wood 1969). Asochyta fabae was also observed to invade intercellular spaces between epidermis and mesophyll of susceptible faba bean lines within the area of the lesion (Maurin et al 1993). In contrast, intra-as well as intercellular hyphae in the palisade mesophyll 24 h after inoculation were visible in pea leaves inoculated with M. pinodes resulting in a rapid disorganisation and browning of the contents of invaded cells and those adjacent to intercellular hyphae beyond the necrosis (Heath and Wood 1969).…”

Section: Infection Processmentioning

confidence: 99%

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Comparison of the epidemiology of ascochyta blights on grain legumes

2007

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Asochyta blights of grain legumes are caused by fungal pathogens in the genus Ascochyta. Different species infect the different legume species, and in pea three species including Phoma medicaginis var. pinodella have been implicated in ascochyta blight. The impact of the diseases varies between crops, countries, seasons and cropping systems, and yield loss data collected under welldefined conditions is scarce. However, ascochyta blights are considered major diseases in many areas where legumes are grown. Symptoms appear on all aerial parts of the plant, and lesions are similar for most of the species, except for M. pinodes and P. medicaginis var. pinodella. Infected seed, stubble and/or air-borne ascospores are major sources of primary inoculum. Their importance varies between species and also between regions. All Ascochyta spp. produce rain-splashed conidia during the cropping season which are responsible for the spread of the disease within the crop canopy. Only in pea are ascospores involved in secondary disease spread. Limited data suggests that Ascochyta spp. may be hemibiotrophs; however, toxins characteristic for necrotrophs have been isolated from some of the species. Modelling of ascochyta blights is still in the developmental stage and implementation of such models for disease forecasting is the exception.

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Section: Type Of Parasitismmentioning

confidence: 90%

Section: Infection Processmentioning

confidence: 99%

Comparison of the epidemiology of ascochyta blights on grain legumes

2007

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“…Such differences, regarding the insect galleries have been observed in Abies grandis after attacks by Scolytus ventralis ( Berryman and Ashraf, 1970). Differences between resistant and susceptible trees, regarding fungus development have been also observed in Vicia fabae after inoculations with Ascochyta fabae ( Maurin et al, 1993). However, we observed that the fungus extended the same distance from the inoculation point in both resistant and susceptible trees.…”

Section: Discussionmentioning

confidence: 88%

Resistance level in Scots pine clones and artificial introductions of Tomicus piniperda (Col., Scolytidae) and Leptographium wingfieldii (Deuteromycetes)

Bois¹,

Lieutier

2000

J Applied Entomology

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Scots pine trees belonging to clones considered to be resistant or susceptible after mass inoculations of Leptographium wingfieldii, a fungus associated with Tomericus piniperda, were submitted to a low density of fungal inoculations or beetle insertions. The length of the phloem‐induced reaction zone, the fungal extension and fungal density inside the reaction zone, and the length of maternal galleries of T. piniperda were measured. The length of the phloem reaction zone never differed between resistant and susceptible trees. The density of the fungus mycelium in histological sections of the phloem, and the length of the maternal galleries in the reaction zone were higher in the susceptible trees than in the resistant ones. These factors could be good indicators of resistance of Scots pine to mass attacks.

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“…A erwards, the specimens were double-rinsed for 5 minutes in the same bu er and then for another 5 minutes in distilled water. A er rinsing, the specimens were post-fixed in 0.5% uranyl orthosilicate dihydrate solution for 2 hours at room temperature (Maurin et al, 1993). Next, they were dehydrated in an alcohol series (30%, 50%, 70%, 95% and 100%, for 15 minutes at each concentration at 4°C, followed by 90%, 95% and 100% for 15 minutes at each concentration at room temperature).…”

Section: Methodsmentioning

confidence: 99%

Pathogenicity and Ultrastructural Studies of the Mode of Penetration by Phoma strasseri in Peppermint Stems and Rhizomes

Zimowska¹

2012

Pol J Microbiol

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Pathogenicity and ultrastructural investigation of the inoculation of peppermint stems and rhizomes with Phoma strasseri conidia was undertaken using scanning and transmission electron microscopy to examine the host-parasite relationship. Pathogenicity experiments demonstrated that all tested P. strasseri isolates had infected the stems and rhizomes of peppermint. Of all inoculation methods, direct placement of colonized agar plugs on damaged epidermis and soaking stems and rhizomes in conidial suspension were the most effective. The behavior of the conidia deposited on the stems and rhizomes was investigated at different time intervals after inoculation: 6, 16, 24, 36 and 48 h. Conidia produced an appressorium directly at the end of a short germ tube. Appressoria were formed over the cuticle, but never over stomata. Direct penetration to host tissue through the cuticle was observed. The spore and hyphae were covered with a mucilaginous sheath.

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Histopathology of the interaction between Ascochyta fabae and Vicia faba: comparison of susceptible and resistant reactions

Cited by 14 publications

References 9 publications

Comparison of the epidemiology of ascochyta blights on grain legumes

Comparison of the epidemiology of ascochyta blights on grain legumes

Resistance level in Scots pine clones and artificial introductions of Tomicus piniperda (Col., Scolytidae) and Leptographium wingfieldii (Deuteromycetes)

Pathogenicity and Ultrastructural Studies of the Mode of Penetration by Phoma strasseri in Peppermint Stems and Rhizomes

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