Record ID No. |
316 |
Author(s) |
Caravaca F., Alguacil M.D., Diaz G., Roldan A. , 2003 |
Affiliation |
Consejo Superior de Investigación Cientifica (CSIC), Centro de Edafología y Biología Aplicada del Segura, Department of Soil and Water Conservation and Waste Management, POB 4195, Campus Espinardo, Murcia 30100, SPAIN |
Title |
Use of nitrate reductase activity for assessing effectiveness of mycorrhizal symbiosis in Dorycnium pentaphyllum under induced water deficit |
Source. Vol.(no):Page |
Communications in Soil Science and Plant Analysis. 34(15-16): 2291-2302p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Soil plant relations |
Sub-subjects |
Manuring |
Host |
Dorycnium pentaphyllum |
Organism |
Glomus intraradices, G. mosseae, G. deserticola |
Country |
Spain, Europe |
Abstracts |
The effects of arbuscular-mycorrhizal (AM) fungi, Glomus intraradices, Glomus mosseae or Glomus deserticola on root nitrate reductase (NR) activity, growth parameters, colonization rate and foliar nutrient (NPK) concentrations were assessed in Dorycnium pentaphyllum L. Seedlings grown under well-watered (-0.03 MPa) or drought conditions (-0.60 MPa). Under water stress, plants colonized by AM fungi exhibited root dry weights and root/shoot ratios, which were lower than un-inoculated plants. G. Deserticola had more effect on N uptake whereas G. Intraradices and G. Mosseae had more effect on phosphorus (P) uptake under the water-limited conditions tested. Nodulation was inhibited and AM colonization rate was increased by water stress in D. Pentaphyllum seedlings inoculated with G. Deserticola. Root NR activity increased significantly in G. Deserticola-colonized plants, under both well-watered (by 137%) and drought-stressed conditions (by 140%), with respect to uninoculated plants. NR activity could be used as an index for assessing the effectiveness of fungus-host plant combinations for mitigation of water-deficit stress. |