Effects of Autotoxicity on Seed Germination, Gas Exchange Attributes and Chlorophyll Fluorescence in Melon Seedlings

Exploration of the Potential Mechanism of Faba Bean–Wheat Intercropping to Control Faba Bean Fusarium Wilt Due to Allelopathic Plant Extracts

“…Autotoxicity refers to the process by which plants or their residues release toxic chemicals into the environment during decomposition, thereby inhibiting the germination and growth of the same plant and serving as a common cause of plant continuous cropping obstacles. ,, This experiment showed that all concentrations tested of the extracts of faba bean stems, leaves, and roots significantly inhibited the growth of faba bean seedlings compared with the control, and the pronounced inhibition of root growth was particularly significant. Plant extracts from melon significantly inhibited the germination of its own seeds and the growth of its cotyledons, which is similar to the results that we obtained .…”

“…Autotoxicity refers to the process by which plants or their residues release toxic chemicals into the environment during decomposition, thereby inhibiting the germination and growth of the same plant and serving as a common cause of plant continuous cropping obstacles. ,, This experiment showed that all concentrations tested of the extracts of faba bean stems, leaves, and roots significantly inhibited the growth of faba bean seedlings compared with the control, and the pronounced inhibition of root growth was particularly significant. Plant extracts from melon significantly inhibited the germination of its own seeds and the growth of its cotyledons, which is similar to the results that we obtained . Plant cells accumulate free radicals owing to reduced antioxidant capacity during adverse conditions, leading to the oxidative damage of cellular macromolecules and membranes. , Furthermore, autotoxic metabolites produced by the stressed plants accelerate free radical-induced membrane peroxidation and breakdown, thereby providing nutrients to the pathogens and enhancing their ability to invade plant roots.…”

“…Plant extracts from melon significantly inhibited the germination of its own seeds and the growth of its cotyledons, which is similar to the results that we obtained. 19 Plant cells accumulate free radicals owing to reduced antioxidant capacity during adverse conditions, leading to the oxidative damage of cellular macromolecules and membranes. 30,31 Furthermore, autotoxic metabolites produced by the stressed plants accelerate free radical-induced membrane peroxidation and breakdown, thereby providing nutrients to the pathogens and enhancing their ability to invade plant roots.…”

“…), and alfalfa (Medicago sativa Linn.) plants that have a strong allelopathic effect on their own physiology or that of other plants. − However, most of the research on the mechanism of disease control by intercropping focuses on plant root exudates, and there are few studies on the extracts of plant stems, leaves, and roots that also have allelopathic effects.…”

Effects of autotoxicity and allelopathy on seed germination and seedling growth in Medicago truncatula

“…Since it is believed that autotoxicity was caused by secondary metabolites with water solubility Miller, 1995), this 10.3389/fpls.2022.908426 Frontiers in Plant Science 06 frontiersin.org study selected two different of the autotoxic substances, one being root exudate of M. truncatula and the other being aqueous extracts of alfalfa and M. truncatula plants, to investigate their biological activities on M. truncatula and alfalfa as recipient plants. Since seed germination and seedling growth stages of a plant are sensitive to external environmental changes (Matias et al, 2014), and these two stages are often used to analyze allelopathy and autotoxicity effects (Ma et al, 2014;Huang et al, 2019;Kato-Noguchi and Kurniadie, 2020;Zhang et al, 2021b), this study also selected these two stages to investigate the autotoxic and allelopathic effects of M. truncatula and alfalfa. Since autotoxicity and allelopathy in M. truncatula are unknown, while autotoxicity in alfalfa is well-documented, we tested and analyzed the effects in both species.…”