New chitosan derivatives induced resistance to fusarium wilt disease through phytoalexin (Gossypol) production

The present investigation studied the mechanism of resistance to Fusarium oxysporum f.sp.vasinfectum induced by some chitosan derivatives in susceptible cotton plants. Pretreating cotton seeds with chitosan markedly increased cotton resistance to vascular wilt caused by Fusarium oxysporum f.sp. vasi...

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Main Authors:	Omyma A.Awadalla, Yehia A.-G. Mahmoud
Format:	Article
Published:	Universiti Kebangsaan Malaysia 2005
Online Access:	http://journalarticle.ukm.my/3965/ http://journalarticle.ukm.my/3965/

id	ukm-3965
recordtype	eprints
spelling	ukm-39652012-03-27T01:53:52Z http://journalarticle.ukm.my/3965/ New chitosan derivatives induced resistance to fusarium wilt disease through phytoalexin (Gossypol) production Omyma A.Awadalla, Yehia A.-G. Mahmoud, The present investigation studied the mechanism of resistance to Fusarium oxysporum f.sp.vasinfectum induced by some chitosan derivatives in susceptible cotton plants. Pretreating cotton seeds with chitosan markedly increased cotton resistance to vascular wilt caused by Fusarium oxysporum f.sp. vasinfectum. The five chitosan derivatives tested repressed the pathogen mycelial growth. Chitosans 3, 4 and 8 had a disease score of 0.5:tO.02, 0.6:tO.5 and 0.0 respectively, indicating that the host plants were free from visual symptoms and that these chitosans were the most effective in controlling Fusarium wilt disease. Phytoalexin (gossypol) production was greatly increased with a maximum of 1.16 mg/5gmfresh root tissue in chitosan-treated plants. The level of gossypol was higher in the roots than in the stems and the maximum production of gossypol was achieved in cotton plants treated with the chitosan 3, 4 and 8 and inoculated with the pathogen spores as compared with uninoculated plants. Universiti Kebangsaan Malaysia 2005-12 Article PeerReviewed Omyma A.Awadalla, and Yehia A.-G. Mahmoud, (2005) New chitosan derivatives induced resistance to fusarium wilt disease through phytoalexin (Gossypol) production. Sains Malaysiana, 34 (2). pp. 141-146. ISSN 0126-6039 http://www.ukm.my/jsm/english_journals/vol34num2_2005/vol34num2_05page141-146.html
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
description	The present investigation studied the mechanism of resistance to Fusarium oxysporum f.sp.vasinfectum induced by some chitosan derivatives in susceptible cotton plants. Pretreating cotton seeds with chitosan markedly increased cotton resistance to vascular wilt caused by Fusarium oxysporum f.sp. vasinfectum. The five chitosan derivatives tested repressed the pathogen mycelial growth. Chitosans 3, 4 and 8 had a disease score of 0.5:tO.02, 0.6:tO.5 and 0.0 respectively, indicating that the host plants were free from visual symptoms and that these chitosans were the most effective in controlling Fusarium wilt disease. Phytoalexin (gossypol) production was greatly increased with a maximum of 1.16 mg/5gmfresh root tissue in chitosan-treated plants. The level of gossypol was higher in the roots than in the stems and the maximum production of gossypol was achieved in cotton plants treated with the chitosan 3, 4 and 8 and inoculated with the pathogen spores as compared with uninoculated plants.
format	Article
author	Omyma A.Awadalla, Yehia A.-G. Mahmoud,
spellingShingle	Omyma A.Awadalla, Yehia A.-G. Mahmoud, New chitosan derivatives induced resistance to fusarium wilt disease through phytoalexin (Gossypol) production
author_facet	Omyma A.Awadalla, Yehia A.-G. Mahmoud,
author_sort	Omyma A.Awadalla,
title	New chitosan derivatives induced resistance to fusarium wilt disease through phytoalexin (Gossypol) production
title_short	New chitosan derivatives induced resistance to fusarium wilt disease through phytoalexin (Gossypol) production
title_full	New chitosan derivatives induced resistance to fusarium wilt disease through phytoalexin (Gossypol) production
title_fullStr	New chitosan derivatives induced resistance to fusarium wilt disease through phytoalexin (Gossypol) production
title_full_unstemmed	New chitosan derivatives induced resistance to fusarium wilt disease through phytoalexin (Gossypol) production
title_sort	new chitosan derivatives induced resistance to fusarium wilt disease through phytoalexin (gossypol) production
publisher	Universiti Kebangsaan Malaysia
publishDate	2005
url	http://journalarticle.ukm.my/3965/ http://journalarticle.ukm.my/3965/
first_indexed	2023-09-18T19:40:16Z
last_indexed	2023-09-18T19:40:16Z
_version_	1777405543554482176

New chitosan derivatives induced resistance to fusarium wilt disease through phytoalexin (Gossypol) production

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