Influence of arbuscular mycorrhizal fungi on the functional mechanisms associated with drought tolerance in carob ( Ceratonia siliqua L.)

摘要: Arbuscular mycorrhizal symbiosis strengthened the mechanisms developed by carob to withstand drought stress, including improved water relations, increased cell wall rigidity and osmolytes accumulation, enhanced oxidative stress alleviation. The present investigation was carried out provide more insight into influence of arbuscular fungi (Funneliformis mosseae, Rhizophagus fasciculatus, intraradices) on tolerance carob. Non-mycorrhizal (NM) (AM) plants were subjected two watering regimes, 75% field capacity (well water) or 25% (water stress). Obtained results showed that stressed AM exhibited performance in terms growth biomass production, nutrient acquisition, alleviation compared NM plants. In fact, under limited regime, maintained high stomatal conductance relative content (over 94%) due their uptake efficiency. Moreover, especially those associated with F. mosseae membrane integrity 80%), rigidity, leaf potential osmotic at full turgor loss, while these parameters steeply decreased Furthermore, drought-stressed hydrogen peroxide malondialdehyde contents activities superoxide dismutase, ascorbate peroxidase, guaiacol catalase Thus, AMF involved improving increasing enhancing Funneliformis most effective stress.