During symbiosis establishment a complex dialogue occurs between the two partners: AMF recognize compounds secreted by host roots, such as strigolactones, which elicit an extensive hyphal branching in the vicinity of the roots, before the formation of appressoria on the root surface. On the other hand, AMF release symbiotic signals, a mixture of sulphated and non-sulphated simple lipochitooligosaccharides (LCOs), triggering mycorrhizal formation in different plant families. Here, we will focus on (i) fungal release of symbiotic signals during the asymbiotic phase of AMF life cycle and fungal recognition responses to host-derived signals during the presymbiotic phase, (ii) appressorium formation on the root surface; (iii) the symbiont/host crosstalk during cell-to-cell interactions leading to the formation of a functional symbiosis, (iv) fungal behavior in the presence of non-host plants
Libro riguardante la comunicazione tra organismi, in particolare il capitolo sintetizza le conoscenze, dal punto di vista del fungo simbionte, dei meccanismi di comunicazione tra funghi micorrizici arbuscolari e piante ospiti, che instaurano un complesso dialogo durante la loro interazione. La review tratta: i) il rilascio da parte dei funghi dei segnali durante la fase asimbiotica e le risposte di riconoscimento ai segnali della pianta durante la fase presimbiotica, ii) la formazione degli appressori sulla superficie radicale, iii) il dialogo ospite/simbionte durante l'interazione che porta alla formazione della simbiosi, iv) il comportamento fungino nelle interazioni con piante non ospiti
The Crosstalk Between Plants and Their Arbuscular Mycorrhizal Symbionts: A Mycocentric View
Cristiana Sbrana;
2017
Abstract
During symbiosis establishment a complex dialogue occurs between the two partners: AMF recognize compounds secreted by host roots, such as strigolactones, which elicit an extensive hyphal branching in the vicinity of the roots, before the formation of appressoria on the root surface. On the other hand, AMF release symbiotic signals, a mixture of sulphated and non-sulphated simple lipochitooligosaccharides (LCOs), triggering mycorrhizal formation in different plant families. Here, we will focus on (i) fungal release of symbiotic signals during the asymbiotic phase of AMF life cycle and fungal recognition responses to host-derived signals during the presymbiotic phase, (ii) appressorium formation on the root surface; (iii) the symbiont/host crosstalk during cell-to-cell interactions leading to the formation of a functional symbiosis, (iv) fungal behavior in the presence of non-host plantsI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.