Abstract
Experiments were conducted on three populations of white spruce (Piceaglauca (Moench) Voss) to determine if calendar dates could be used as guidelines to spray gibberellin A4/7 in an Aromox–ethanol solution to increase flowering and to determine if early flushing (EF) and late flushing (LF) clones, sprayed on the same dates, responded differently. Spraying from July 8 to September 9 was ineffective, but spraying from May 7 to July 1 gave a significant response. Elongating shoots sprayed from May 13 to June 3 produced significantly more ovulate and staminate strobili than did elongating shoots sprayed from June 10 to July 1, and both produced significantly more than the control. Gibberellin A4/7 significantly increased production of ovulate and staminate strobili in the EF and LF clones that were sprayed only from June 2 to June 30. LF clones produced significantly more ovulate strobili than the EF clones, but there was no significant difference between them in staminate strobilus production. The studies demonstrated that the timing of gibberellin A4/7 spray application affects the flowering response in white spruce.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
