negative regulation of development of symbiont in host
positive regulation of arbuscule formation for nutrient acquisition from host
positive regulation of development of symbiont in host
Any process in which the symbiont activates or maintains its progression from an initial condition to a later condition, within the cells or tissues of the host organism. The host is defined as the larger of the organisms involved in the symbiotic interaction.
positive regulation of formation by symbiont of haustorium for nutrient acquisition from host