134 an increase in the number of dierent arbuscular

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: AM –  AM fungi provides plants with mineral nutrients from soil •  Especially phosphorous •  Produce extensive hyphal networks in soil •  Release acid phosphatases •  Absorb phosphate in excess and store it in form of polyphosphates Fig 13.4 •  Host ranges and communi8es of AM fungi –  AM have a wide range of host –  Experimental study by Van den Heijden et al. •  Plants in natural communi8es are colonized preferen8ally by different strains of AM fungi •  The diversity of AM fungi in a site can influence the plant biodiversity in natural ecosytems Fig. 13.4. An increase in the number of different arbuscular mycorrhizal fungi in a soil leads to an increase in plant produc8vity and plant biodiversity. 2 11/23/09 Fig 13.5 Ectomycorrhizas •  Found mainly on woody plants –  Coniferous and broad ­leaved trees outside of tropics •  Such as pine, spruce, oak, beech, and birch –  Members of Basidiomycota or Ascomycota –  Characteris8c feature •  Presence of substan8al sheath of fungal 8ssue –  Incases the terminal nutrient absorbing rootlets Fig. 13.5. Total biomass and the biomass of three representa8ve plant species grown in soil with no mycorrhizal fungus (0) or with four separate AM fungal species (A,B,C,D) or a combina8on of all four AM species. Note that the ver8cal scale of each histogram is different but the largest biomass is shown in each case. Ectomycorrhizas •  Ecologically adapted to grow as symbionts –  Can grow in laboratory on simpl...
View Full Document

This document was uploaded on 03/02/2014 for the course BIOL 4848 at Youngstown State University.

Ask a homework question - tutors are online