caa a22 4500 463171888 CHVBK 20180406164815.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s00344-007-9010-y doi (NATIONALLICENCE)springer-10.1007/s00344-007-9010-y Plant Hormones Isolated from "Katahdin” Potato Plant Tissues and the Influence of Photoperiod and Temperature on Their Levels in Relation to Tuber Induction [Elektronische Daten] [Ahmed Malkawi, Bruce Jensen, Alan Langille] Qualitative and quantitative analyses were carried out on vegetative tissues of potato (Solanum tuberosum cv. "Katahdin”) in search of natural products thought to play a role in tuber induction. Tissues were obtained from plants initially grown in a growth chamber under noninducing conditions (30°C day and 28°C night with an 18-h photoperiod), and then half of the plants were moved to inducing chambers (28°C day and 13°C night with a 10-h photoperiod) for 10 days prior to tissue harvest. Plants from each chamber were then harvested at 2-day intervals for 10 days, separated into above- and belowground portions, and the lyophilized tissues were extracted and subjected to rigorous purification and separation using high-performance liquid chromatography. This was followed by identification and quantification using combined gas chromatography-mass spectrometry. Compounds isolated and identified included gibberellic acid; cytokinins cis-zeatin riboside, trans-zeatin, trans-zeatin riboside, and isopentenyladenine; and jasmonates jasmonic acid, tuberonic acid and its methyl ester, methyl 7-isocucurbate, and 9,10-dihydromethyljasmonate. Methyl 7-isocucurbate and 9,10-dihydromethyljasmonate were detected for the first time in potato tissue as endogenous compounds. Cytokinin and jasmonate levels generally increased under inducing conditions, whereas gibberellic acid levels declined progressively during the 10-day sampling period. Only gibberellic acid, jasmonic acid, and cis-zeatin riboside levels were significantly influenced by induction. Springer Science+Business Media, LLC, 2007 Solanum tuberosum nationallicence Potato tuberization nationallicence Phytohormones nationallicence Jasmonates nationallicence Cytokinins nationallicence Gibberellic acid nationallicence Malkawi Ahmed Department of Chemistry, University of Maine, 04469, Orono, Maine, USA aut Jensen Bruce Department of Chemistry, University of Maine, 04469, Orono, Maine, USA aut Langille Alan Department of Plant, Soil and Environmental Sciences, University of Maine, 04469, Orono, Maine, USA aut Journal of Plant Growth Regulation Springer-Verlag 26/4(2007-12-01), 308-317 0721-7595 26:4<308 2007 26 344 https://doi.org/10.1007/s00344-007-9010-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00344-007-9010-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Malkawi Ahmed Department of Chemistry, University of Maine, 04469, Orono, Maine, USA aut NATIONALLICENCE 700 1- Jensen Bruce Department of Chemistry, University of Maine, 04469, Orono, Maine, USA aut NATIONALLICENCE 700 1- Langille Alan Department of Plant, Soil and Environmental Sciences, University of Maine, 04469, Orono, Maine, USA aut NATIONALLICENCE 773 0- Journal of Plant Growth Regulation Springer-Verlag 26/4(2007-12-01), 308-317 0721-7595 26:4<308 2007 26 344 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer