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SHADE‐INDUCED DAMPING‐OFF IN CONIFER SEEDLINGS
Author(s) -
TAHER M. M.,
COOKE R. C.
Publication year - 1975
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1975.tb01422.x
Subject(s) - pinus <genus> , botany , hypocotyl , shoot , carbohydrate , biology , lignin , woody plant , horticulture , chemistry , biochemistry
SUMMARY Seedlings of Pinus sylvestris and Picea sitchensis were grown aseptically in sand culture for 30 days under a range of light intensities. Relative growth rates (whole seedlings and shoots) of Pinus sylvestris were greater than those of Picea sitchensis and significantly so at low light intensities, but their carbohydrate status was lower. The ethanol‐soluble carbohydrate/ethanol‐insoluble carbohydrate ratio was always higher in Pinus sylvestris than in Picea sitchensis and epidermal cell walls, lignification and vascularization in the hypocotyl were much less developed in Pinus sylvestris than in Picea sitchensis , especially at low light intensities. These findings are discussed in relation to the established susceptibility of Pinus sylvestris and resistance of Picea sitchensis to shade‐induced damping‐off by necrotrophic fungi.