Ahmed Ali Ahmed El-Khatib اد/ احمد الخطيب

Professor -

Faculty of science

Address: سوهاج ، مصر



Publications Which contain the keyword: allelopathy

Milkweed allelopathy in the agroecosystem
Laboratory experiments were conducted to evaluate the allelopathic effects of different concentration (5, 10, 20, 30, 40, 50%) of Calotropis procera(Aiton) W.T. leaf aqueous extractusing different indices for germination, seedling and physical growth of wheat (Triticum aestivum) and black mustard (Brassica nigra). Except for germination speed, results indicated that the extracts have such allelopathic potential which can significantly reduce the ... Read more

2018-11-25 00:28:55 Keywords allelopathy, pigment, crops, Growth, Calotropis procera,
Growth And Physiological Response Of Some Cultivated Species Under Allelopathic Stress Of Calotropis Procera (Aiton) W.T
The present work through light on the role of allelopathic potential of Calotropis procera on some growth and physiological parameters of three cultivated crops. The selected species, namely; cucumber, tomato, and wheat were grown in a pot experiment under six different concentrations of aqueous leaf extract ranged from 0 % to 50 % (w/v) with 10 % intervals for one ... Read more

2018-11-09 16:41:48 Keywords wheat, wild oat, allelopathy,
Growth and physiological responses of wild oat to the allelopathic potential of wheat
Greenhouse experiments were conducted to discover the effects of the tissue extracts and competition of wheat (Triticum aestivum L.) on the growth attributes of wild oats (Avena fatua L.). Water-soluble toxins from living tissues of wheat significantly decreased the growth attributes of wild oats. In comparison with the control, the irrigation of wild oat plants with shoot extracts resulted in ... Read more

The ecological significance of allelopathy in the community organization of Alhagi graecorum
the alleopathic potential of alhagi fraecorum was studied and their role in its community organization was followed Read more

2018-11-09 16:57:39 Keywords soil rhizosphere, mulch, chenopodium murale, allelopathy,
Allelopathy in the rhizosphere and amended soil of Chenopodium murale L
Soil infested with _Chenopodium murale_ and amended with it were investigated to verify their allelopathic effects on seedling emergence and some growth and physiological parameters of five test species, _Trifolium alexandrinum, Triticum aestivum, Melilotus indicus, lycopersicum esculentum_ and _Cucumus sativus._ The two types of soil exhibited phytotoxic effects on the seedling emergence of the test species. Growth and physiological parameters ... Read more

2018-11-09 17:01:02 Keywords allelopathy, chenopodium, ecology, inter-specific, competition,
Does allelopathy have a role in the ecology of  Chenopodium murale
In view of their potential bioaccumulation of heavy metals, Ceratophyllum demersum and Myriophyllum spicatum was studied under hydroponic cultures enriched by different Pb concentrations (25, 50, 75 mg/l) for 1–7 days. Both species exerted remarkable capabilities to concentrate Pb in their tissues as compared to control. The highest accumulation value of Pb (164.26 mg/g.dw) was recorded in C. demersum and ... Read more

Does allelopathy involve in the association pattern of Trifolium resupinatum?
Indoor experiments demonstrated that allelopathic potential of rosette and flowering plants of qort is an important factor explaining the growth reduction of its associated species. Aqueous tissue extracts of flowering plants exhibited strong inhibitory effects on the germination percentage and radicle growth rate of the tested species as compared with those of vegetative plants. Under laboratory conditions, this inhibition was ... Read more

Allelopathic potential of Zilla spinosa on growth of associate flowering plants and some rhizosphere fungi
Zilla spinosa plant part extracts exhibited significantly different inhibitory effect on the seed germination and seedling growth of its associate species. Shoot extract reduced the percentage germination and seedling length of different test species more than root extract. Except of Z. coccineum, seedling growth was more sensitive than seed germination. Shoot/root ratio of all test species increased significantly with increase ... Read more

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