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Endogenous Cytokinins in Solanum tuberosum as Influenced by Photoperiod and Temperature
Author(s) -
FORSLINE P. L.,
LANGILLE A. R.
Publication year - 1975
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.1399-3054.1975.tb01859.x
Subject(s) - photoperiodism , solanum tuberosum , bioassay , cotyledon , cytokinin , endogeny , biology , horticulture , botany , chemistry , biochemistry , auxin , ecology , gene
Using the cucumber cotyledon bioassay, in combination with paper and column chromatographic techniques, 4 compounds exhibiting cytokinin activity were detected in extracts of Katahdin potato plant tissues. Two of these compounds were significantly higher in plants grown under inducing conditions (26°C day and 12°C night with an 8‐h photoperiod) than those grown under non‐inducing conditions (28°C day and 25°C night with a 16‐h photoperiod). One compound increased 10‐fold in above‐ground tissue after only 2 Inductive cycles. Both compounds reached their maximum values in below‐ground tissue after 6 days under inducing conditions, with tuber initiation observed after 8 to 10 days.