Premium
Seasonal Variations in the Occurrence of Indole‐3‐Acetic‐Acid in Buds of Pinus silvestris
Author(s) -
ALDEN TORSTEN
Publication year - 1971
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1971.tb01087.x
Subject(s) - shoot , dormancy , scots pine , pinus <genus> , auxin , botany , indole 3 acetic acid , biology , elongation , horticulture , chemistry , germination , biochemistry , materials science , ultimate tensile strength , metallurgy , gene
Studies with a fluorescence spectrophotometer and gas chromatography confirm earlier results that IAA occurs in buds and sprouting shoots of Scots pine. IAA could be found during the whole vegetation period but not during winter dormancy. The largest amount was obtained during shoot growth in spring and early summer. During the most intensive elongation phase, a gradient could be found in the concentration of auxin with the highest amount in the basal part and a decreasing concentration upwards in the shoot.