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PHENOLICS FROM LARIX NEEDLES. VI. EFFECT OF SHORT‐DAY TREATMENT
Author(s) -
Niemann G. J.,
Nuijten S. T. M.
Publication year - 1973
Publication title -
acta botanica neerlandica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0044-5983
DOI - 10.1111/j.1438-8677.1973.tb00839.x
Subject(s) - vitexin , budding , photoperiodism , stimulation , chemistry , horticulture , cunninghamia , botany , zoology , biology , flavonoid , biochemistry , endocrinology , antioxidant
SUMMARY A short‐day (SD) photoperiod of 3 to 7 days was critical for delay in budding of defoliated seedlings. Both growth‐stimulating and growth‐inhibiting substances were present in Larix needle extracts. SD treatment induced a decrease of stimulation and an increase in inhibiting activity. The concentration of one of the main flavonoids, a vitexin derivative, was significantly decreased in SD needle extracts.