Juglone Inhibits Pine Growth Under Certain Moisture Regimes
- 1 September 1978
- journal article
- research article
- Published by Wiley in Soil Science Society of America Journal
- Vol. 42 (5), 801-803
- https://doi.org/10.2136/sssaj1978.03615995004200050030x
Abstract
Black walnut (Juglans nigra L.) produces juglone (5‐OH‐1, 4‐napthoquinone), a phytotoxin that has allelopathic effects on certain plant species. Field studies were conducted in southwestern Ontario, Canada, in mixed plantations of red pine (Pinus resinosa Ait.), white pine (P. strobus L.) and walnut growing on the Brant‐Tuscola‐Colwood catena of fine sandy loam soils. On excessively drained Brant sites pine often suppressed the walnut while on imperfectly drained Tuscola and poorly drained Colwood sites, walnut suppressed or even killed the pine. In laboratory studies juglone and its inhibitory activity readily disappeared from Brant soil under a “dry moisture regime” but remained in Brant soil under a “wet moisture regime”. The field and laboratory studies suggest that edaphic conditions play an important role in the interactions between walnut and other species.This publication has 2 references indexed in Scilit:
- Inhibition of Respiration by Juglone in Phaseolus and LycopersiconBulletin of the Torrey Botanical Club, 1967
- Further Investigation of Toxic Substances which Arise from Guayule Plants: Relation of Toxic Substances to the Growth of Guayule in SoilBotanical Gazette, 1946