BIO 411 Lecture Notes - Lecture 6: Whole Genome Sequencing, Mycorrhiza, Glomeromycota

35 views3 pages
13 Jan 2019
School
Course

Document Summary

150-160 described species: based on morphology of asexual spores. Formerly classified with the zygomycota based on coenocytic hyphae and superficial similarities with sporocarps of some forms. New division based on ssu rrna analyses (> 50 species) proposed by schussler et al. Key finding: monophyletic group that probably diverged from the same common ancestor as members of the ascomycota and basidiomycota. Now, full genome sequencing now puts them nearer to the zygomycota: sometimes within the zygomycota (glomeromycotina) Thought to have colonized land with plants 460 mya based on fossil evidence (redecker et al. Key traits: asexual spores only, arbuscules, vesicles internal and external hyphae, coenocytic. Benefits of association: fungus benefits receives energy from the host plant in the form of photosynthate (carbohydrates) Common features: plant root fungal structures become incorporated into the root epidermis or cortex- not the vascular system (xylem or phloem) No obvious changes in root morphology: must stain to see.