Evaluation of the Effects of Allelopathic Aqueous Plant Extracts, as Potential Preparations for Seed Dressing, on the Modulation of Cauliflower Seed Germination

Abstract

Allelopathic plants can be widely used in bio-farming considering their potential role in the improvement of seed germination. The study presented in this work was designed to evaluate the effects of two extraction methods and the effects of allelopathic aqueous extracts from twenty plants as seed dressing preparations on the number of germinating and infested seeds of cauliflower (Brassica oleracea convarietas L. botrytis var. botrytis). Plant extracts (in the form of cold-soaked macerates and infusions) were used for seed dressing. The percentages of normally germinating, non-germinating, and pathogen-infested seeds were determined in a paper test. Of the 20 herbal plant species used in the study, the biopreparations extracted from Zea mays L. moles were the most effective as they evoked the most beneficial effects on both seed germination and reduction of infestation by microbial pathogens. The study also showed that infusions used for seed treatment were better at improving cauliflower seed germination than were macerates. This method of extract preparation probably enabled an increase both in the availability and activity of allelochemical compounds.

Transcriptional and proteomic insights into phytotoxic activity of interspecific potato hybrids with low glycoalkaloid contents

“…A lot of laboratory research focused on recognition of phytotoxic potential use water extracts as phytotoxic factor. Water extracts most closely resemble leaching of compounds from plant organs, that occurs under natural conditions (leaching by rain, dew) [ 3 , 4 ].…”

Plant extracts - importance in sustainable agriculture

“…Classical extraction techniques like maceration, shaking, Soxhlet extraction use large volumes of organic solvents and are considered time-consuming (Michalak and Chojnacka, 2014;EL Boukhari et al, 2020). In the case of plant extracts, more advanced extraction methods are used to analyse the biological properties of extracts in vitro tests -bioassays in the laboratory (e.g., Li and Zhihui, 2009;Wei et al, 2011;Cruz-Estrada et al, 2013;Green et al, 2017;Findura et al, 2020a), less advanced extraction methods relate to field trials. Plant extracts examined in the pot (greenhouse) or field trials are mainly produced by soaking the biomass in solvent (e.g., Cheema and Khaliq, 2000;Cheema et al, 2009;Alao and Adebayo, 2015;Farooq et al, 2017;Desoky et al, 2019a;Kayange et al, 2019;Rashid et al, 2020), shaking the biomass with solvent (e.g., Oparaeke, 2007;Roy et al, 2010;Onunkun, 2012), and homogenisation of the biomass in solvent (e.g., Wei et al, 2011;Hayat et al, 2016;Shah et al, 2017;Ali et al, 2019) at room temperature.…”

“…Plant extracts examined in the pot (greenhouse) or field trials are mainly produced by soaking the biomass in solvent (e.g., Cheema and Khaliq, 2000;Cheema et al, 2009;Alao and Adebayo, 2015;Farooq et al, 2017;Desoky et al, 2019a;Kayange et al, 2019;Rashid et al, 2020), shaking the biomass with solvent (e.g., Oparaeke, 2007;Roy et al, 2010;Onunkun, 2012), and homogenisation of the biomass in solvent (e.g., Wei et al, 2011;Hayat et al, 2016;Shah et al, 2017;Ali et al, 2019) at room temperature. In addition to the mentioned methods, the extraction of plant biomass can also be carried out by boiling in water or elevated temperatures and by fermentation (Oparaeke, 2007;Desoky et al, 2019a, 2019bJang and Kuk, 2019Findura et al, 2020a). More advanced extraction techniques are used in the case of isolation of a given biologically active compounds from plant biomass.…”

Identification of a Biostimulating Potential of an Organic Biomaterial Based on the Botanical Extract from Arctium lappa L. Roots

“…Nevertheless, some reports have demonstrated plant stimulation by other plants, as corroborated in previous research conducted by our research group. Extracts from allelopathic plants have been shown to improve the germination and development of seedlings of many crops [ 6 , 7 , 8 , 9 , 10 ]. In addition, when used via foliar or soil application, plant extracts have also affected the seeds yield of soybeans and biometric traits (plant height, location height of the first pod, 1000 seeds weight, and number of pods) [ 10 , 11 ].…”