Colonization of Greek olive cultivars' root system by arbuscular mycorrhiza fungus: root morphology, growth, and mineral nutrition of olive plants

Abstract

Rooted leafy cuttings of three Greek olive (Olea europaea L.) cultivars (Koroneiki, Kothreiki and Chondrolia Chalkidikis) were grown for six months in three soil types, in an experimental greenhouse, in order to investigate: i) if their root system was colonized by arbuscular mycorrhiza fungus (AMF) genus and, ii) if genotypic differences concerning growth and mineral nutrition of olive plants existed. Gigaspora sp. colonized the root system of the three cultivars studied, while Glomus sp. colonized only the root system of 'Koroneiki'. Furthermore, in most cases root colonization by AMF differed among cultivars and soil types. The maximum root colonization, in all soils, was found in 'Chondrolia Chalkidikis'. In the three soils studied, the ratio shoot dry weight (SDW)/ root dry weight (RDW) was higher in 'Chondrolia Chalkidikis' than in the other two cultivars. Furthermore, root system morphology of the three olive cultivars was completely different, irrespectively of soil type. Leaf Mn, Fe, Zn, Ca, Mg, K and P concentrations, as well as total per plant nutrient content and nutrient use effi ciency, differed among cultivars under the same soil conditions. These differences concerning root morphology, SDW/RDW, as well as nutrient uptake and use effi ciency, could be possibly ascribed to the differential AMF colonization by Glomus sp. and Gigaspora sp.

Influence of arbuscular mycorrhiza on photosynthesis and water status of Populus cathayana Rehder males and females under salt stress

“…However, AMF symbiosis resulted in efficient water absorbing by roots and simultaneously increased stomatal conductance, hence transpiration (Jahromi et al 2008). Previous studies reported that root system can interact with salt stress and AMF colonization (Chatzistathis et al 2013;Contreras-Cornejo et al 2014). Our study has shown that salt stress induced the reduction of RL, RV, RSA and RTN, which suggested that the root system was injured to some extent in the process of interacting with salt stress.…”

Fungos Micorrizicos Arbusculares No Desenvolvimento De Mudas De Oliveira (Olea Europaea L.) Cultivadas No Sul De Minas Gerais

“…Na França, Binet et al (2007) No entanto, os primeiros estudos relacionados aos FMAs em oliveira no Brasil foram publicados por Vieira et al (2011), os quais confirmaram a associação micorrízica em diferentes cultivares cultivadas in situ. Os efeitos proporcionados pela simbiose com o hospedeiro são bem conhecidos e, principalmente, relacionados à absorção de água e nutrientes, agregação do solo, alteração da comunidade microbiana da rizosfera (Mechri et al, 2014) e proteção contra estresses físicos e químicos (Miller e Jastrow, 1992), embora fortemente relacionados com as características fisiológicas da planta e dos atributos do solo (Chatzistathis et al, 2013).…”

Manganese soil and foliar fertilization of olive plantlets: the effect on leaf mineral and phenolic content and root mycorrhizal colonization

“…The response of AMF in the present study is visible only in arbuscules (the sites of most intensive plant‐AMF communication), the abundance of which was rather high compared to values reported for adult trees . However, total mycorrhizal colonization of young olive plants obtained in the present study was between 40% and 60%, which is the usual range for olive …”

“…50 However, total mycorrhizal colonization of young olive plants obtained in the present study was between 40% and 60%, which is the usual range for olive. [50][51][52] Higher plants developed different adaptive mechanisms to reduce stress-induced oxidative damage via biosynthesis of wide range of antioxidants. Among them, phenolic compounds play an important role in scavenging free radicals and oleuropein is generally the most prominent phenolic compound in olive cultivars.…”