TY - JOUR AU - Hemberg, Torsten AB - 'i'ORSTKN H E M B E R G Department of Botany of the University of Stockholm I Received February 17th, 1949) In earlier works (HemlnTi,' 1946 and 1947) I liave established the occurrence of large quantities of growtli-inliibiting sul)stances in peelings of resting potatoes, and have assumed that ttie presence of tliesc sulistances is of significance for the re.st-period of tlie potato. Jn the present paper the investigations into these growth-inhibiting substances are continued. In addition, the part played by 3 indole acetic acid in the sprouting of not resting polatoes has been investigated. Chemical Properties of the Growth-Inhibiting Substances and Their Distribution in the Peel-Layer The growth-inhibiting substances in the potato peelings have not previously been investigated witii r<'gard to Iheir chemical properties, nor has the di.s(ribution of the substances in the i>eel-layfr been kn(jwn. In the following, the term ^potato peelings^ denotes an outer layer (c. 1 mm. thick) of the potato tuber, comprising the periderni wilh tJie eyes, a thin layer of the cortex and, by the eyes, some xyleni, phloem and i)ith. Tlie growth-inhibiting sul>stances are ether-soluble, as they are obtained through ether extraction of potato peelings. They are also water-soluble, as, when transferred TI - Significance of Growth‐Inhibiting Substances and Auxins for the Rest‐Period of the Potato Tuber JF - Physiologia Plantarum DO - 10.1111/j.1399-3054.1949.tb07645.x DA - 1949-01-01 UR - https://www.deepdyve.com/lp/wiley/significance-of-growth-inhibiting-substances-and-auxins-for-the-rest-dDr1BSGT0W SP - 24 VL - 2 IS - 1 DP - DeepDyve ER -