Effect of accumulated duration of the light period on bud burst in Norway spruce (Picea abies) of varying ages

Jouni Partanen, Ilkka Leinonen, Tapani Repo

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

One-year-old seedlings (two sowing times), two-year-old seedlings and 14- and 18-year-old cuttings of Norway spruce (Picea abies (L.) Karst.) were exposed to shortening photoperiod (initially 16 h), lengthening photoperiod (initially 6 h) and constant short photoperiod (6 h) treatments with uniform temperature conditions in growth chambers. The timing of bud burst was examined. In all plants, shortening photoperiod treatment seemed to promote bud burst compared with other treatments. This effect was dearest in the oldest material. The results suggest that, in addition to temperature sum, the accumulated duration of the light period may promote bud burst of Norway spruce.
Original languageEnglish
Pages (from-to)111-117
Number of pages7
JournalSilva Fennica
Volume35
Issue number1
Publication statusPrint publication - 2001
Externally publishedYes

Keywords

  • Growth initiation
  • Norway spruce
  • Phenology
  • Photoperiod

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