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Influence of leaf age, leaf surface and frequency of stomata on the susceptibility of poplar cultivars to Marssonina brunnea
Author(s) -
Spiers G.,
Hopcroit D. H.
Publication year - 1984
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1984.tb00173.x
Subject(s) - ultrastructure , cultivar , botany , biology , cell wall , stomatal density , resistance (ecology) , hypha , horticulture , photosynthesis , agronomy
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 . × euramericana but was for several miscellaneous cultivars. There was no significant correlation between stomatal frequency and M., brnnnca infection level. Ultrastructural studies showed hyphae penetrated cell walls ot 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 two leaf surfaces of mature leaves of P. candicans was attributed to the strong cutinisation of the epidermal cell wall of the highly resistant adaxial surface.