Spring Shoot Growth in Douglas-Fir May Be Initiated by Gibberellins Exported from the Roots

摘要: Trials conducted under controlled environments demonstrated that the delay of bud activity Douglas-fir (Pseudotsuga menziesii) seedlings occasioned by low temperature soil could be eliminated application gibberellic acid. Analyses field-grown plants showed a parallel increase in activity, level gibberellin-like compounds xylem sap, and during February March.