1 résultat(s) recherche sur le tag 'potentiel antagoniste'    

دراسة تأثیر المكافحة البیولوجیة بفطر Trichoderma harzianum على بعض الفطریات المصاحبة داخلیا لبذور بعضأصناف القمح لصلب Triticumdurum Desf / مختار حمیتو    

Public ISBD Titre : دراسة تأثیر المكافحة البیولوجیة بفطر Trichoderma harzianum على بعض الفطریات المصاحبة داخلیا لبذور بعضأصناف القمح لصلب Triticumdurum Desf Type de document : texte imprimé Auteurs : مختار حمیتو, Auteur ; العيد دھيمات, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 101 ورقة. Format : 30 سم. Note générale : 2نسخ موجودة في المكتبة المركزي Langues : Arabe (ara) Catégories : Arabe 5 البيولوجيا Tags : Trichoderma harzianum  Triticum durum  potentiel antagoniste  lutte biologique  antagonism capability  biological control  ???? ????????  ???????? ?????????? Index. décimale : 570 بيولوجيا Résumé : The present investigation aimed to isolate and to identify the mycetes accompanying interior in durum wheat seed (Triticum durum Desf.) and to evaluate the in vitro antagonism capability of Trichoderma harzianum against the isolated fungi. Seed samples of durum wheat cultivars Vitron, Waha, GTA Dur and Cirta were made available by the cereal and dry legumes cooperative of Oum-El-Bouaghi (Algeria). First year results allowed the identification of 93 isolates from GTA Dur, Waha and Vitron genotypes. Most frequents genus were, in that order, Alternaria, Cladosporium and Fusarium. 83 isolates were identified in second year from Waha, Vitron and Cirta from which Alternaria were the most frequent genera and Fusarium acuminatum. 129 isolates were found the third year from GTA Dur Waha, Vitron and Cirta, with Alternaria, as the most frequent genera, Fusarium, Stemphylium botryosum, Cladosporium sp , and Botrytis cinerea. The results of the in vitro study of the antagonistic ability of T.harzianum,against the isolated fungi, indicated the inhibition of mycelium growth to variable degrees. Microscopic observations showed that T.harzianum induced cell lyse, destroyed mycelia and spores of the tested isolates, excepted those belonging to Fusarium genus. T.harzianum produced haustoria on mycelia of tested isolates through mycoparasitism. The results of the in vitro study of remote confrontation of T.harzianum with the tested isolates, on PDA medium, suggested that volatile metabolic substances of T.harzianum reduced the growth of the various pathogenic mycetes. Microscopic observations of mycelia showed that, the volatile metabolic substances of T.harzianum induced degradation and inhibited sporulation of certain isolates compared to the non-treated checks. Seed treatment of the studied durum varieties with T.harzianum filtrate enhanced seed germination ability and stimulated seedling growth compared to untreated seed which exhibited weak growth and presented malformations. Treated seed were less infected by the mycetes Diplôme : Doctorat en sciences En ligne : ../theses/biologie/AHAM3966.pdf Format de la ressource électronique : pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9546 دراسة تأثیر المكافحة البیولوجیة بفطر Trichoderma harzianum على بعض الفطریات المصاحبة داخلیا لبذور بعضأصناف القمح لصلب Triticumdurum Desf [texte imprimé] / مختار حمیتو, Auteur ; العيد دھيمات, Directeur de thèse . - constantine (Route ain el bey, Algérie) : Université Constantine 1, 2014 . - 101 ورقة. ; 30 سم. 2نسخ موجودة في المكتبة المركزي Langues : Arabe (ara) Catégories : Arabe 5 البيولوجيا Tags : Trichoderma harzianum  Triticum durum  potentiel antagoniste  lutte biologique  antagonism capability  biological control  ???? ????????  ???????? ?????????? Index. décimale : 570 بيولوجيا Résumé : The present investigation aimed to isolate and to identify the mycetes accompanying interior in durum wheat seed (Triticum durum Desf.) and to evaluate the in vitro antagonism capability of Trichoderma harzianum against the isolated fungi. Seed samples of durum wheat cultivars Vitron, Waha, GTA Dur and Cirta were made available by the cereal and dry legumes cooperative of Oum-El-Bouaghi (Algeria). First year results allowed the identification of 93 isolates from GTA Dur, Waha and Vitron genotypes. Most frequents genus were, in that order, Alternaria, Cladosporium and Fusarium. 83 isolates were identified in second year from Waha, Vitron and Cirta from which Alternaria were the most frequent genera and Fusarium acuminatum. 129 isolates were found the third year from GTA Dur Waha, Vitron and Cirta, with Alternaria, as the most frequent genera, Fusarium, Stemphylium botryosum, Cladosporium sp , and Botrytis cinerea. The results of the in vitro study of the antagonistic ability of T.harzianum,against the isolated fungi, indicated the inhibition of mycelium growth to variable degrees. Microscopic observations showed that T.harzianum induced cell lyse, destroyed mycelia and spores of the tested isolates, excepted those belonging to Fusarium genus. T.harzianum produced haustoria on mycelia of tested isolates through mycoparasitism. The results of the in vitro study of remote confrontation of T.harzianum with the tested isolates, on PDA medium, suggested that volatile metabolic substances of T.harzianum reduced the growth of the various pathogenic mycetes. Microscopic observations of mycelia showed that, the volatile metabolic substances of T.harzianum induced degradation and inhibited sporulation of certain isolates compared to the non-treated checks. Seed treatment of the studied durum varieties with T.harzianum filtrate enhanced seed germination ability and stimulated seedling growth compared to untreated seed which exhibited weak growth and presented malformations. Treated seed were less infected by the mycetes Diplôme : Doctorat en sciences En ligne : ../theses/biologie/AHAM3966.pdf Format de la ressource électronique : pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9546

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
حمي/3966	حمي/3966	Thèse	Bibliothèque principale	Thèses	Disponible

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