Allelopathic Potential of Tropical Plants—A Review

Abstract

The need to meet food demand becomes more urgent as it is forecasted to increase by 50% over the next century. Thus, agronomists promote sensible tools and approaches to eradicate factors that hamper crop production, mainly weeds. The constant use of chemical herbicides to control weeds leads to an increased risk of herbicide-resistant weed populations, environmental pollution, unsafe agricultural products, and negative effects on human health. These problems have caused an interest among researchers to replace synthetic herbicides with alternatives. The purpose of this review was to present the current knowledge base on allelopathic tropical plants and their potential for use in the development of natural product-based, environmentally friendly herbicides for sustainable agriculture, and to stimulate future discussion on this topic. The defence mechanisms of tropical plants have received particular attention because of their potential weed control ability as a natural pesticide that can prevent the overuse of synthetic pesticides. The ancient knowledge of the toxic properties of various tropical plants gives us a basis for creating a novel pest control approach. The synthesis of biopesticides based on allelochemicals opens up the possibility of utilizing natural compounds in crop protection and demonstrates the ability to deal with evolved pesticide resistance.

A review of significance of allelopathy in anticipating negative climate change effects

“…Similarly, prolonged drought can lead to higher concentrations of ferulic acid in wheat and momilactones A and B in rice (Maqbool, Abdul, 2013;Scavo, Mauromicale, 2021). However, it is important to note that the impact of altered precipitation on allelopathic potential can vary depending on specific plant species and environmental conditions (Gaofeng et al, 2018;Motmainna et al, 2023). Therefore, further academic research is essential to comprehensively understand the intricate relationship between climate-induced changes in precipitation, allelopathy, and plant interactions.…”

Allelopathic effect of the methanol extract of the weed species-red sorrel (Rumex acetosella L.) on the growth, phytohormone content and antioxidant activity of the cover crop - white clover (Trifolium repens L.)

“…Allelochemicals are secondary metabolites generated as byproducts of plant physiological activities [ 3 ]. When they are released, they can impede germination, growth, and development, creating imbalances in the levels of certain phytohormones and reducing root and shoot length, resulting in the degradation of photosynthetic pigments, cell membrane damage, denaturation and the inhibition of protein synthesis [ 4 – 8 ].…”