Stimulatory effects of alga Spirogyra extract on Glycine max L.

This study aimed to determine the effects of Spirogyra extract on plant growth, yields and nutritional and nutraceutical traits of soybean seeds. An experiment was done during 2022- 2023 Soybean seeds of Taqa and Lee 74 cultivars were sown, and the Spirogyra extract (0.5, 1.5, 3 and 6 %) was used to irrigate to 75 % per pot) Field capacity. Biometric traits, seed yield, and seed number were determined. The application of Spirogyra extract decreased the growth and yield of soybean, with no adverse effects on the nutritional value of seeds. Allelopathic compounds present in the algae extract were identified using HPLC, and included hydroquinone and cinnamic acid. [ABSTRACT FROM AUTHOR]