Enhanced fruit yield and quality of tomato by photosynthetic bacteria and CO2 enrichment under reduced irrigation

Rapeseed plant: biostimulation effects of plant growth‐promoting Actinobacteria on metabolites and antioxidant defense system under elevated CO2 conditions

“…Nevertheless, the significant improvement of the level of the antioxidant enzymes in response to the combined treatment of biofertilizer and eCO 2 in our experiment (Fig. 5) was consistent with the results of Du et al ., 13 which has already been reported as an integrated reaction to alterations in diverse metabolic processes, regardless of the changes in the accumulation of ROS 8 …”

“…These results are consistent with those of other studies reporting more promotion in photosynthesis and biomass production in plants when a combined treatment of eCO 2 and plant growth-promoting microorganisms is applied as compared to their application independently. 11 Moreover, it has already been suggested that eCO 2 conditions not only increased the photosynthetic pigments but also enhanced the allocation of photosynthates to the roots of biofertilized plants, 11,56 which in turn boosted the potential for roots to uptake more nutrients from the soil, 13 and consequently positively affected the symbiosis interactions between plant roots and beneficial microorganisms in the rhizosphere. 57 Such induction by the interaction between both treatments can result in further growth and development in fertilized plants under eCO 2 , 13 the reaction that was apparently not observed for chlorophyll and carotenoid content in non-fertilized plants in our experiment.…”

“…Moreover, it has already been suggested that eCO 2 conditions not only increased the photosynthetic pigments but also enhanced the allocation of photosynthates to the roots of biofertilized plants, 11,56 which in turn boosted the potential for roots to uptake more nutrients from the soil, 13 and consequently positively affected the symbiosis interactions between plant roots and beneficial microorganisms in the rhizosphere 57 . Such induction by the interaction between both treatments can result in further growth and development in fertilized plants under eCO 2 , 13 the reaction that was apparently not observed for chlorophyll and carotenoid content in non‐fertilized plants in our experiment. In this regard, no increase in the concentration of the pigments in non‐fertilized plants in response to eCO 2 was not consistent with the research of Almuhayawi et al ., 58 who reported that eCO 2 stimulates the increase of photosynthesis and the accumulation of pigments in the plant.…”

“…Actinobacteria, arbuscular mycorrhiza fungi) on improving plant growth under eCO 2 conditions. 11,12 Du et al 13 proposed that since the developed root system is unable to meet a plant's demand for nutrient uptake due to increased growth caused by eCO 2 conditions, the application of PGPB is likely to provide more benefits to plant roots under eCO 2 conditions, thus providing more nutrients for plant growth. 13 Due to their potential PGPR action and widespread repartition in plants, Actinobacteria have increased in application in agricultural practice.…”

“…11,12 Du et al 13 proposed that since the developed root system is unable to meet a plant's demand for nutrient uptake due to increased growth caused by eCO 2 conditions, the application of PGPB is likely to provide more benefits to plant roots under eCO 2 conditions, thus providing more nutrients for plant growth. 13 Due to their potential PGPR action and widespread repartition in plants, Actinobacteria have increased in application in agricultural practice. 14 Actinobacteria are Gram-positive bacteria that produce metabolites, primarily antibiotics, 15 and have a high guanine-cytosine content in their DNA that ranges from 51% to more than 70%.…”