Fungal Spore Germination and Pre-symbiotic Mycelial Growth – Physiological and Genetic Aspects
- Manuela GiovannettiAffiliated withDepartment of Crop Plant Biology, University of Pisa Email author
- , Luciano AvioAffiliated withInstitute of Agricultural Biology and Biotechnology, UOS Pisa, C.N.R.
- , Cristiana SbranaAffiliated withInstitute of Agricultural Biology and Biotechnology, UOS Pisa, C.N.R.
Arbuscular mycorrhizal fungi (AMF) are obligate biotrophs, living symbiotically in the roots of most land plants. They form spores in the soil, which are able to germinate and grow, but are unable to complete their life cycle without establishing a functional symbiosis with a host plant. In this chapter, results of recent studies providing new insights into the main developmental switches occurring in the fungal organism, from the relief of spore dormancy to the development of germlings and growth arrest in the absence of the host, are reviewed. The knowledge of environmental, cytological, biochemical and molecular events involved in early stages of AMF life cycle may reveal how these obligate symbionts compensate for the lack of host-regulated spore germination, possibly representing a strong selective disadvantage. Diverse scientific approaches showed multiple survival strategies, active during pre-symbiotic mycelial growth, contributing to the survival of AM fungal individuals and populations.
KeywordsArbuscular mycorrhizal fungi Spore dormancy AMF life cycle Spore germination Pre-symbiotic growth Germling growth arrest Host signals Survival strategies Ancient asexuals Gene expression
- Fungal Spore Germination and Pre-symbiotic Mycelial Growth – Physiological and Genetic Aspects
- Book Title
- Arbuscular Mycorrhizas: Physiology and Function
- pp 3-32
- Print ISBN
- Online ISBN
- Springer Netherlands
- Copyright Holder
- Springer Science+Business Media B.V.
- Additional Links
- Arbuscular mycorrhizal fungi
- Spore dormancy
- AMF life cycle
- Spore germination
- Pre-symbiotic growth
- Germling growth arrest
- Host signals
- Survival strategies
- Ancient asexuals
- Gene expression
- Industry Sectors
- Editor Affiliations
- ID1. , Volcani Center, Agricultural Research Organization
- ID2. Dept. Agronomy & Natural Resources, Sec. Forestry, Agricultural Research Organization (ARO)
- Author Affiliations
- 1. Department of Crop Plant Biology, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
- 2. Institute of Agricultural Biology and Biotechnology, UOS Pisa, C.N.R., Via del Borghetto 80, 56124, Pisa, Italy
To view the rest of this content please follow the download PDF link above.