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Weed control using allelopathic plant species

Aliki, H.M. (2016) Weed control using allelopathic plant species. Doctoral thesis, Harper Adams University.

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Abstract

Several laboratory experiments were conducted during the course of this project to test the allelopathic effects of Brassica napus L. leaves, stems, roots and flowers on three weed species Phalaris minor (Retz.), Convolvulus arvensis (L.) and Sorghum halepanses (L.) germination and growth, and to determine the glucosinolates profile and their concentration in Brassica napus tissues. In this study, it was found that all water extract treatments from different Brassica napus parts and under different concentrations had the ability to inhibit weed species germination and growth significantly. Exposure to flower and stem extracts caused the greatest reduction in the seed germination and seedling growth of all weed species that were tested in this study. Water extracts from different Brassica napus parts and during different plant development stages significantly inhibited the seed germination and growth of all weed species. Glucosinolates profiles and concentrations in Brassica napus tissues were significantly different between different plant parts during different plant development stages. Progoitrin was the dominant glucosinolate in B. napus flowers and gluconasturtiin in roots. However, flower extracts were more effective in weed management as compared with root extracts. Applying aqueous solution of pure glucosinolate significantly inhibit seed germination and seedling growth. Glucos inolate types and their concentrations linked positively with weed species inhibition. Water extract from different parts of B. napus during water stress conditions under all plant development stages demonstrated variability in their effect on germination and growth of weed species between the water stress levels and within the same plant development stage. Furthermore, glucosinolates concentrations and III myrosinase activity in B. napus tissues were significantly different between different plant parts during the water stress conditions and under different plant development stages. This project has revealed that using water extracts from B . napus may play an important role in weed species inhibition.

Item Type: Thesis (Doctoral)
Divisions: Crop and Environment Sciences
Depositing User: Ms Kath Osborn
Date Deposited: 16 Nov 2018 15:51
Last Modified: 16 Nov 2018 15:51
URI: http://hau.collections.crest.ac.uk/id/eprint/17351

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