Record ID No. |
1800 |
Author(s) |
Mandyam, K., Jumpponen, A , 2008 |
Affiliation |
Kansas State Univ, Div Biol, Manhattan,KS 66506 USA |
Title |
Seasonal and temporal dynamics of arbuscular mycorrhizal and dark septate endophytic fungi in a tallgrass prairie ecosystem are minimally affected by nitrogen enrichment |
Source. Vol.(no):Page |
Mycorrhiza.18(3):145-155p |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Biochemistry |
Sub-subjects |
Miscellaneous |
Organism |
n.a. |
Country |
United States |
Abstracts |
Root colonization by arbuscular mycorrhizae (AM) and dark septate endophytic
(DSE) fungi in nitrogen amended and unamended mixed tallgrass prairie communities were analyzed
monthly over two growing seasons. Roots were stained with Trypan blue and Sudan IV and fungal
structures quantified using the modified magnified intersections method. Root length colonized
(RLC) by DSE exceeded AM colonization during early part of the growing season. Fungal
colonization varied among the years and was greater in 2003 than in 2002. Seasonal variation
among the months within a growing season was observed in 2002 but not in 2003 for both AM and
DSE. AM fungi were most abundant during the peak growing season of dominant C-4 vegetation while
DSE were most abundant during the early part of the growing season. Hyperparasitism of AM hyphal
coils by melanized septate fungi was frequently observed and increased with AM coil frequency.
Although nitrogen amendment had altered the plant community composition, it had no impact on the
colonization by AM or DSE fungi. |