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Abstract(s)
Tagetes patula L. is a prominent plant that is frequently used for its ornamental value. Marigolds are sources of various
compounds of great interest to agricultural, pharmaceutical, and nutritional industries. Microalgae can be applied as a
biostimulant as they have multifunctional properties in agriculture, namely facilitating nutrient uptake, improving crop
performance and physiological status, and thus increasing tolerance to abiotic stress. This study evaluated the efect of
applying Chlorella vulgaris as a plant biostimulant on the growth and fowering of T. patula plants. Microalgae suspensions
were applied to the substrate at concentrations of 0.5, 2.0 and 5.0 g dry weight (DW) L−1. A set of plants without the
application of microalgae was used as control. The use of microalgae had a positive impact on plant growth. Specifcally, C.
vulgaris application resulted in greater height, while the highest concentration (5.0 g DW L−1) resulted in higher fresh weight.
Microalgae application signifcantly promoted the earlier fowering of marigolds. The macronutrient and micronutrient
values were statistically similar between the control plants and those treated with microalgae. When considering only the
treated plants, there was a signifcant correlation between the concentration of C. vulgaris and the concentrations of N, P,
Mn and Cu in the shoots of T. patula plants. Plants receiving higher concentrations of C. vulgaris exhibited higher levels of
these nutrients. These results highlight the potential use of Chlorella vulgaris as an efective biostimulant for enhancing the
growth, fowering, and nutrient uptake of T. patula, ofering valuable applications for improving ornamental plant production
and, ultimately, agricultural sustainability.
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Springer
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Without CC licence