Record ID No. |
4870 |
Author(s) |
Nacer Mekahlia M., Beddiar A., *Chenchouni H. , 2013 |
Affiliation |
Department of Natural and Life Sciences, University of Tebessa, 12002 Tebessa, Algeria, *Email: chenchouni@gmail.com |
Title |
Mycorrhizal dependency in the olive tree (Olea europaea) across a xeric climatic gradient |
Source. Vol.(no):Page |
Advances in Environmental Biology 7(9): 2166-2174p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Soil plant relations |
Sub-subjects |
Dependency |
Host |
Olea europaea |
Organism |
Arbuscular Mycorrhiza (AM) |
Country |
Algeria, North Africa |
Abstracts |
The vesicular-arbuscular mycorrhizas (AM) are very significant in the life of most plants including olive tree (Olea europaea L.), which is of great economic importance. However, due to its wide distribution, especially, in the Mediterranean, it is subject to various environmental stresses, particularly drought and aridity. This study aims to evaluate the percentage of root colonization of olive by arbuscular fungi along a climatic gradient (sub-humid, semi-arid and arid), and to estimate how this varies depending years (2010-2012) and seasons (fall, winter, spring and summer). Results showed that the roots of the olive tree are colonized by arbuscular endomycorrhizal fungi under the three types of climate, whatever the season or the study years. Mycorrhization parameters revealed a frequency of colonization (F%) of up to 83%, mycorrhizal intensity (M%) reaching 42% and a rate of arbusculars in the mycorrhizal parts of root fragments (a%) of 4%. Mycorrhizal colonization varies between bioclimatic zones. It is more frequent and intense in the sub-humid climate. Mycorrhiza also varies according to the season; it is more important in spring and slight in winter. This study allowed the characterization, for the first time, of the mycorrhizal status of olive in the northeastern Algeria, and estimate variations of that colonization depending on seasons and climate types. |