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Influence of leaf age leaf surface and frequency of stomata on the susceptibility of poplar cultivars to marssonina brunnea



Influence of leaf age leaf surface and frequency of stomata on the susceptibility of poplar cultivars to marssonina brunnea



European Journal of Forest Pathology 14(4-5): 270-282



Leaf age was a significant (P < 0.05) factor in the resistance of poplar cultivars to M. brunnea. Leaf surface (adaxial/abaxial) was not a significant factor for P. nigra, P. deltoides and P. .times. euramericana, but was for several miscellaneous cultivars. There was no significant correlation between stomatal frequency and M. brunnea infection level. Ultrastructural studies showed hyphae penetrated cell walls of soft expanding leaves more readily than cell walls of mature leaves. The higher resistance of mature leaves was thus attributed to differences in cell wall ultrastructure. Differential resistance of the 2 leaf surfaces of mature leaves of P. candicans was attributed to the strong cutinization of the epidermal cell wall of the highly resistant adaxial surface.

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Accession: 005687034

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DOI: 10.1111/j.1439-0329.1984.tb00173.x


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