Paper Details
Full metadata, abstract, citation, and access status.
Effects of Perilla straw fermentation extract on seed germination and seedling growth of different field crops
Abstract
The disposal of medicinal plant residues represents a significant challenge of resource waste and environmental pollution. Perilla frutescens stalk ferment extract (PFSE) is a plant biostimulant obtained from fermented P. frutescens stalks, however, little is known about its dose response relationship and species-specific effects on major grain crops. The objective of this work was to determine the optimum PFSE concentration and compare species specific response in pea, maize, and wheat. The results showed the general “low-promotion, high-inhibition” phenomenon. Germination of pea and maize were greatly inhibited by 20 g/L while that of wheat was not so sensitive. Seedling morphology and root activity were optima at 5～10 g/L and 3～5 g/L, respectively. Physiological responses varied by crop: chlorophyll content peaked at 5 g/L in maize and pea, and at 3 g/L or 1 g/L in wheat. Proline increased at 5 g/L in all species, but the concentration optimum of soluble sugars and proteins were different. The levels of antioxidant enzymes (SOD, CAT, POD) and malondialdehyde (MDA) showed a concentration-dependent trend. At high concentrations of PFSE, oxidative damage was increased. We concluded that 5 g/L PFSE was the best dose to promote growth, with sensitivity in the order of pea>maize>wheat. These findings support PFSE as an efficient biofertilizer, which also suggests a sustainable method for using Perilla straw.
