Soluble carbohydrates in roots of leek (Allium porrum) plants in relation to phosphorus supply and VA mycorrhizas |
| |
| Authors: | F Amijee D P Stribley P B Tinker |
| |
| Institution: | (1) School of Agriculture, University of Aberdeen, AB9 1UD Aberdeen, Scotland, UK;(2) Rothamsted Experimental Station, AFRC Institute of Arable Crops Research, AL5 2JQ Harpenden, Herts., UK;(3) Natural Environment Research Council, Polaris House, SN2 1EU Swindon, Wilts., UK |
| |
| Abstract: | Leek plants (Allium porrum L.) inoculated with Glomus mosseae were raised on sterilized soil/sand medium amended with Ca(H2PO4)2.H2O to test the hypothesis that high concentration of soil P inhibits formation of vesicular-arbuscular (VA) mycorrhizas by reducing concentration of soluble carbohydrate in the root. When P supply was increased, from either P addition or VA mycorrhizal infection, there was initially also an increase in concentration of soluble carbohydrate in the root. At the concentration of soil P at which infection was reduced, concentration of soluble carbohydrate was at its maximum. Therefore the above hypothesis is discounted. An increased delay in infection establishment and a greater number of abortive entry points would suggest that high concentration of soil P reduces VA mycorrhizal infection by changing the anatomy of the root to make it resistant to fungal penetration. |
| |
| Keywords: | Allium porrum L Glomus mosseae L leek phosphorus supply soluble carbohydrates VA mycorrhizas |
| 本文献已被 SpringerLink 等数据库收录！ |
|
