Abstract
Arbuscular Mycorrhizal Fungi (AMFs) are known as a symbiotic microorganism which ameliorates growth and tolerance against stressful conditions of their host plants. It is characterized by morphological, physiological and biochemical events that are controlled by the interaction of both plants and fungus. The aim of this research was to evaluate the intensity (M%) and the Arbuscules abundance (A%) of mycorrhizal infection with Glomus intraradices in olive (Olea europaea L.) tree roots of five Tunisian local cultivars (cvs Oueslati, Meski, Jarboui, Chemlali and Chetoui). After 2 weeks of acclimatization in a greenhouse, the olive plantlets were inoculated with “G. intraradices”. The estimate of percentage of root colonization was calculated using an adequate method. This method consists of putting fragments of colored roots from each cultivar and observing them in a light microscope. These fragments were noted in a grid based on a scale class. Differences obtained in values were detected in all cultivars. This paper suggests the presence of cultivar-dependent differences in both the M% and A% that can be modified by AM fungi as well as by its interaction with olive roots. Results confirm also that oueslati cv has the best compatibility with G. intraradices. These findings open up many opportunities for mycorrhiza inoculation in the oleaster plants production in Tunisia. Key words: Olea europaea L., Glomus intraradices, arbuscules, Oueslati cv.
Highlights
Arbuscular Mycorrhizal Fungi (AMF) is a beneficial form of symbiosis microorganism for majority of plants because of their positive effect on plant growth, rhizosphere volume (Al-Karaki, 2000) and a sustainable symbiosis with which to improve drought tolerance in horticultural crops, including fruit trees, vegetables and flowers (Jayne and Quigley, 2014; Baum et al, 2015). Bonfante and Genre (2015) described the „plantish‟ or „fungish‟ signals process as a hot topic in the field of plant–microbe interactions
Results confirm that oueslati cv has the best compatibility with G. intraradices
AMF is a beneficial form of symbiosis microorganism for majority of plants because of their positive effect on plant growth, rhizosphere volume (Al-Karaki, 2000) and a sustainable symbiosis with which to improve drought tolerance in horticultural crops, including fruit trees, vegetables and flowers (Jayne and Quigley, 2014; Baum et al, 2015)
Summary
AMF is a beneficial form of symbiosis microorganism for majority of plants because of their positive effect on plant growth, rhizosphere volume (Al-Karaki, 2000) and a sustainable symbiosis with which to improve drought tolerance in horticultural crops, including fruit trees, vegetables and flowers (Jayne and Quigley, 2014; Baum et al, 2015). Bonfante and Genre (2015) described the „plantish‟ or „fungish‟ signals process as a hot topic in the field of plant–microbe interactions.
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