Wpływ substancji allelopatycznych na kiełkowanie nasion, wzrost i rozwój roślin

Abstract

The effects exerted by allelochemicals on physiological and metabolic processes have been widely treated in various publications on the subject. The key allelopathic impacts consist in plants releasing into the environment chemicals capable of modifying the growth and development of other plants. This modification may have either a stimulating or inhibiting effect. Allelochemicals are capable of affecting a number of biochemical physiological processes occurring in plants, and they may also modify their course. Growth is the process that is particularly vulnerable to the presence of allelochemicals. The latter are capable of having particularly adverse effects on cell divisions and elongation. Photosynthesis is another process affected by allelochemicals. They may either operate directly, by producing alterations in the photosynthetic apparatus, or indirectly, via limiting water uptake and transport within plants. The three basic sources from which allelochemicals are released are as follows: cultivated plants, weeds, and microorganisms. Allelochemicals were discovered in all plant parts, both vegetative and generative. The highest allelopathic effects are attributed to compounds derived from the vegetative parts.