Influence of temperature and growth regulators on wound periderm formation of potato tuber
When a potato tuber is wounded, cork cambium is formed just beneath the wounded area. The cambium produces waterproofing polymeric and polyphenolic compounds known as suberin that are deposited on the cell wall of the tissue. Little is known about the ideal conditions and endogenous factor(s) that control the formation of suberized area, also called wound periderm (WP). In this study, we observed that WP formation is largely dependent on temperature. Among different temperatures (15°C - 35°C) tested, only 25°C promoted WP formation. Washing of the tissue discs immediately after cutting severely inhibited WP formation. However, keeping the discs for 4 days or more followed by washing failed to show any inhibitory effects. Finally, the washed tissue discs were treated with different plant hormones and among them, abscisic acid showed a stimulatory effect in inducing WP formation.
. Ruth, E. Stark., Won Sohn, Ralph, A. Pacchiano, Jr., Mohamed Al-Bashir & Joel, R. Garbow (1994). Following Suberization in potato wound Periderm by histochemical and solid-state 13C Nuclear Magnetic Resonance methods. Plant Physiol., 104: 527-533.
. Borg-Olivier, O. & Monties, B. (1989). Characterization of lignins, phenolic acids and tyramine in the suberized tissues of natural and wound induced potato periderm. C. R. Acad. Sci. Paris, 308: 141-147.
. Borg-Olivier, O. & Monties, B. (1993). Lignin, suberin, phenolic acids and tyramine in the Suberized, wound-induced potato Periderm. Phytochemistry, 32: 601–606.
. Lulai, E.C. & Orr, P.H. (1994). Techniques for detecting and measuring developmental and maturational changes in tuber native Periderm. American Potato J., 71: 489-505.
. Bernards, M.A. & Lewis, N.G. (1998). The macromolecular aromatic domain in suberized tissue: a changing paradigm. Phytochemistry, 47 (6): 915-933.
. Hornbacher, A., Olsen, N., Nolte, P. and Woodell, L. (2001). The influence of seed growing and storage temperature on the performance of five seed potato cultivars. Am. J. Potato Res., 78(6):458.
. Soliday, C.L., Dean, B.B., Kolattukudy, P.E. (1978). Suberization: inhibition by washing and stimulation by Abscisic acid in potato disks and tissue culture. Plant Physiol., 61(2):170-4.
. Kolattukudy, P.E. (1984). Biochemistry and function of Cutin and Suberin. Canadian J. Bot., 62: 2918-2933.
This work is licensed under a Creative Commons Attribution 4.0 International License.