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- W2137996813 abstract "2 Abstract: Limited literature exists on the subject of disease control in woody plants in Egypt. Uredinio spores cycle of Melampsora sp repeatedly and reinvest willow (Salix tetrasperma) during the vegetation period. Different treatment were applied before and after the appearance of rust infection. The application of proline, gibberellin and methionine increased the severity of infection while sodium silicate decreased severity of infection where, the percentage of infected leaves was 51.53,47.0, 46.44 and 22.88 respectively. On the other hand, application of Trichoderma harzianum and Saccharomyces cerevisiae gave reasonable control of leaf rust severity with infected leaves percentages of 10.69 and 19.18 % respectively compared with control (Plant inoculated with pathogen uredinio spores without treatment).The chlorophyll content a(a &b) were decreased in infected plant than in the healthy. The GC/MS analysis in this study revealed that great differences in the chemical structure and molecular weight of detected compounds in healthy and infected plant, although 12 and 8 compound were detected in healthy and infected plant respectively, two compounds only were similar in chemical structure Methyl 5-nitro-2,12-dioxocyclodecane- 1 - carboxylate and Methyl 5-nitro-2, 11 -dioxo-cycloundecane- 1-carboxylate were detected in healthy and infected plant respectively. Ultrastructures of healthy leaves confirmed the regular form of host cells and equal distances of the intracellular spaces with defenatly cell wall, mitochondria and large number of plastides.On the other hand distortion in cellular component and lyses of host cell wall were observed as a result of infection. The ultrastructure of intercellular hyphae and dikaryotic haustoria of Melampsora sp, and the host response to haustorial invasion was investigated with multishaped haustorial lobes were present inter- and intracellular in host cells" @default.
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- W2137996813 date "2009-01-01" @default.
- W2137996813 modified "2023-09-26" @default.
- W2137996813 title "Efficacy of fungal rust disease on willow plant in Egypt." @default.
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