Record ID No. |
1794 |
Author(s) |
Li, H .Y., Smith, S.E., OphelKeller, K., Holloway, R.E., Smith, F.A , 2008 |
Affiliation |
University of Adelaide, School of Earth & Environmental Science, Waite Campus, DX650636, Adelaide, SA 5005, AUSTRALIA |
Title |
Naturally occurring arbuscular mycorrhizal fungi can replace direct P uptake by wheat when roots cannot access added P fertiliser |
Source. Vol.(no):Page |
Functional Plant Biology.35(2):124-130p |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Biochemistry |
Sub-subjects |
Miscellaneous |
Organism |
n.a. |
Country |
Australia,Oceania |
Abstracts |
We investigated the roles of naturally occurring arbuscular mycorrhizal ( AM)
fungi in phosphorus ( P) uptake by wheat ( Triticum aestivum L.) in a calcareous, P-fixing soil.
Plants grew in a main pot containing autoclaved soil (NM) or autoclaved soil mixed with
non-autoclaved soil ( to provide inoculum of naturally occurring AM fungi; AM). Granular ( GP;
monoammonium phosphate) or fluid (FP; ammonium polyphosphate) fertiliserswere applied in small
compartments (PCs) within a main pot, to which either roots plus hyphae (- Mesh) or hyphae only
(+ Mesh) had access. Controls received no additional P (NP). Inoculated plants were well
colonised by AM fungi. AM growth depressions were observed in - Mesh treatments with NP and GP,
but not with FP. Neither AM growth nor P responses were observed in + Mesh treatments. AM plants
had much higher P uptake than NM plants, regardless of the P and mesh treatments. Total P uptake
by NM plants increased with FP in - Mesh, but was unaffected by either form of P in the + Mesh
treatments. Total P uptake by AM plants was similar between - Mesh and + Mesh treatments,
regardless of applied P, showing that roots plus hyphae and hyphae alone have the same ability to
obtain P. Thus, hyphae can take over the roles of roots in P uptake when roots are not able to
access P sources. |