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菌物学家科海萍踪
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作者 臧穆 《中国食用菌》 北大核心 2004年第6期8-8,共1页
关键词 菌物学家 杨祝良 迪嘉敦 菌丝组织
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Phytophthora Root and Crown Rot on Fruit Trees in Bulgaria
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作者 M. Nakova 《Journal of Agricultural Science and Technology(A)》 2011年第1X期57-67,共11页
Phytophthora root and crown rot was found on the fruit trees in Bulgaria for the first time in the period 1998-1999. Monitoring of the disease spread from 2000 to 2007 points out incidence between 2 and 14 per cent, i... Phytophthora root and crown rot was found on the fruit trees in Bulgaria for the first time in the period 1998-1999. Monitoring of the disease spread from 2000 to 2007 points out incidence between 2 and 14 per cent, in some orchards and nurseries in the Southern part of Bulgaria. The following Phytophthora species were identified based on morphological and cultural characteristics, and temperature requirements: Phytophthora cactorum, Phytophthora citrophthora, Phytophthora drechsleri, Phytophthora cryptogea, Phytophthora hybrid specie and Pythium. Prevailing specie was P. cactorum. P. cryptogea and P. cactorum were confirmed by application of molecular methods. Nutritional requirements of P. cactorum and P. citrophthora were studied. Most Nitrogen sources stimulated the mycelial growth of P. cactorum to a higher extend, and reduced the colony size ofP. citrophthora. Different Carbon sources were utilized well by P. cactorum, and only saccharose and maltose had a stimulating effect on the mycelial growth of P. citrophthora. MgSO4.7H20 was the preferred sulfur source for both fungi, as L-cysteine and L-methionine only for P. cactorum. Phytophthora infection leads to physiological changes in the.host plant tissues. The tendency traced out is: about disorders in the amino acid metabolism, increase in the total sugars and slight reduction of the cellulose content. The total nitrogen, phosphorus and potassium content are reduced and the calcium and magnesium are increased. Photosynthesis of inoculated plants was suppressed and transpiration was increased. 展开更多
关键词 Phytophthora root and crown rot carbon PHOSPHORUS nitrogen and sulfur sources amino acids content photosynthesis.
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Antimicrobial Activities of Some Plants from Ivorian Flora on Southern Blight in Cote d'ivoire
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作者 N'guessan Aya Carine Amari Ler-N'Ogn Dadé Georges Elisée +1 位作者 Johnson Félicia Koné Daouda 《Journal of Life Sciences》 2017年第7期311-320,共10页
This study aims at determining and comparing the in vitro antifungal activity of six EOs (essential oils) extracted from Monodora myristica, Melaleuca quinquenervia, Eucalyptus torelliana, Chenopodium ambrosioides, ... This study aims at determining and comparing the in vitro antifungal activity of six EOs (essential oils) extracted from Monodora myristica, Melaleuca quinquenervia, Eucalyptus torelliana, Chenopodium ambrosioides, fresh Zingiber officinalis and dehydrated Zingiber officinalis with those of three synthetic fungicides (Callicuivre, Banko plus and Mancozeb) on Sclerotium rolfsii a pathogenic fungus of tomato in Cote d'Ivoire. The products were added to PDA (potato dextrose agar) medium at various concentrations. The results showed different aspects of the mycelium, different activities on mycelium growth and sclerotia production depending on the explants (mycelium or sclerotia). Depending on their IC and MGI (mycelium growth inhibition), the oils stemming from Chenopodium ambrosioides and fresh Zingiber officinalis showed more inhibitory activities on mycelial growth (reduction rate of 100%) and sclerotia production at 250 ppm. These activities were close to or even greater than those of fungicides. The mancozeb fungicide showed stronger activity than the others by inhibiting mycelium growth and sclerotia production of mycelium explants at 250 ppm. This study offers the possibility of using EOs in the control strategies of Sclerotium rolfsii. 展开更多
关键词 Solanum lycopersicon Sclerotium rolfsii sensitivity synthetic fungicides EOS
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