title: Spring shoot growth in douglas-fir may be initiated by gibberellins exported from the roots.
abstract: Trials conducted under controlled environments demonstrated that the delay of bud activity of Douglas-fir (Pseudotsuga menziesii) seedlings occasioned by low temperature of the soil could be eliminated by application of gibberellic acid. Analyses of field-grown plants showed a parallel increase in bud activity, level of gibberellin-like compounds in xylem sap, and soil temperature during February and March.
authors.forename: D P
authors.initials: DP
authors.lastname: Lavender
authors.forename: G B
authors.initials: GB
authors.lastname: Sweet
authors.forename: J B
authors.initials: JB
authors.lastname: Zaerr
authors.forename: R K
authors.initials: RK
authors.lastname: Hermann