Spirulina platensis Biofertilization for Enhancing Growth, Photosynthetic Capacity and Yield of Lupinus luteus

Abstract

Cyanobacteria can play an important role in sustainable agriculture by improving crop growth and production, as well as environmental quality. The current study was conducted to evaluate the role of Spirulina platensis extract in the improvement of growth, photosynthetic capacity and yield of Lupinus luteus. Different concentrations (0.25, 0.5 and 1.0%) of S. platensis methanolic extract were used for priming seeds and foliar spraying applications. Growth, photosynthetic pigment content and activity were recorded at 35 days of cultivation. The yield measurements and protein profile of seeds were performed at 60 days. For both treatments, the lower concentration (0.25%) of the extract was the most successful in improving all growth metrics and the phytohormonal level of L. luteus. Photosynthetic pigment and capacity, nutrient content and yield components of L. luteus were improved with the extract of 0.25% concentration. However, the growth was significantly inhibited at the higher concentration (1.0%), recording lower values of the measured characters than the control. A positive correlation was observed between the total chlorophyll, photosynthetic rate, yield parameters and carbohydrate accumulation by the application of the S. platensis extracts. The protein profile of seeds revealed that spraying treatment triggered the appearance of a new band of 30.56 KDa. The promotion of growth could be attributed to the nutrients, bioactive molecules and phytohormones in the extract. The use of Spirulina-based stimulators is reliable with the concept of sustainable agriculture by enhancing photosynthetic pigment content and rate ensuring the correlation between the yield and those measured parameters of L. luteus.

Impact of Chlorella vulgaris, Nannochloropsis salina, and Arthrospira platensis as bio-stimulants on common bean plant growth, yield and antioxidant capacity

“…This could be attributed to an imbalance in plant hormones and disruption of mineral element homeostasis, in comparison to the control plants that were not treated with the extracts. These findings align with previous studies that demonstrated the negative impact of applying A. platensis extract on radish fresh weight at concentrations exceeding 15% 57 , and the inhibitory effect on Lupinus luteus growth at a concentration of 1.0% 58 .…”

Mitigating drought stress in wheat plants (Triticum Aestivum L.) through grain priming in aqueous extract of spirulina platensis

“…The findings of this study demonstrate that the application of S. platensis significantly enhances the concentration of TSS in both cultivars, particularly under drought-stress conditions. These results are consistent with previous research highlighting the potential of S. platensis as a biofertilizer in enhancing the growth of Lupinus luteus by an accumulation of soluble sugars [ 116 ]. The significant increase in TSS content following SPAE + DS treatment suggests that S. platensis may enhance the overall soluble sugar content of the wheat cultivars, which is a crucial factor in plant stress tolerance.…”

Influence of Spirulina Extract on Physiological, Qualitative, and Productive Traits of Four Sugarcane Genotypes

“…Foliar application with spirulina extract concentration (0.2%) of studied sugarcane genotypes scored the highest values of all measured physiological traits in plant cane and 1st ratoon. These results are consistent with those reported by Shedeed et al [32], they found that, after applying 0.25% spirulina extract topically to Lupinus luteus, the highest values of growth and yield components were obtained, as compared to higher doses (0.5% and 1.0%). At the greater concentration (1.0%), however, the growth was markedly impeded, resulting in lower measured character values than the control.…”