Abstract
Host-specificity is an important characteristic of fungal pathogens. Changing climate could create more appropriate environmental conditions for phytopathogens, thus formerly host-specify fungi could be able to colonize new hosts. Noxious plant pathogen fungi, which can infect several plant species are well-known worldwide. These genera may expand their range of hosts because of the appearance in new geographic areas due to climate change. This new exposure can result in serious problems in agriculture because of the lack of immunity. The susceptibility of apple tree was studied through testing pathogenicity in vitro with species isolated from walnut twigs and nuts, and identified by ITS sequences. Three of four tested species, Botryosphaeria dothidea, Diaporthe eres and Diplodia seriata colonized and necrotized the infected apple branches, while Juglanconis juglandina was not able to infect the twigs. Members of Botryosphaeriaceae were the most virulent, causing the largest lesions in the fastest way. This experiment draws attention to the threat of new host-pathogen connections, which can arise because of the favourable weather conditions and can spread between neighbouring cultures.
Highlights
Fungi are present in all groups of plants as saprophytes or parasites, and some of them cannot grow without any host (Alexopoulos et al, 1996)
Collection of fungal isolates In order to study the fungal microbiome of apple trees, samples were collected in Pallag, in the Horticulture Investigational Station of University of Debrecen
In the cankerous apple branches, two Botrystis spp., four Diplodia spp., and Alternaria isolates were on the basis of colony morphology and conidial characters
Summary
Fungi are present in all groups of plants as saprophytes or parasites, and some of them cannot grow without any host (Alexopoulos et al, 1996). They can spread on a global scale, which depends heavily on environmental factors. Their spore can move by rain, irrigation water, wind and insects, which allows to travel from one plant to another. Host-specify fungi can grow only on one particular plant species, which phenomenon was studied on a molecular biology basis and developed gene for gene thesis (Flor, 1971)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
