Journal of Zhejiang University SCIENCE B
ISSN 1673-1581(Print), 1862-1783(Online), Monthly

2007   Vol. 8   No. 4   p. 283~288

Changes in biochemical constituents and induction of early sprouting by triadimefon treatment in white yam (Dioscorea rotundata Poir.) tubers during storage

JALEEL Cheruth Abdul, GOPI Ragupathi^†, MANIVANNAN Paramasivam, KISHOREKUMAR Ashok, GOMATHINAYAGAM Muthiah, PANNEERSELVAM Rajaram

(Stress Physiology Lab, Department of Botany, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India)
^†E-mail: suriyagopi@yahoo.co.in
Received Oct. 4, 2006 revision accepted Jan. 22, 2007

Abstract: The ability of triadimefon (TDM), a triazolic fungicide, to alter the biochemical constituents and thereby minimizing the days required for sprouting in white yam (Dioscorea rotundata Poir.) tubers during storage under (30±2) °C in the dark, was studied. TDM at 20 mg/L was given to tubers by dipping the tubers in treatment solution containing 20 mg/L TDM on 10, 25 and 40 d after storage (DAS). Starch, sugars, protein, amino acid contents as well as protease and α-amylase activities were estimated on 15, 30 and 45 DAS from two physiological regions viz., apical and basal regions of the tubers. In normal conditions (control) sprouting occurred on 70 to 80 DAS. The starch content decreased, while protein, amino acid, sugar contents and protease and α-amylase activities were increased due to TDM treatment and led to early sprouting.

Key words: Biochemical constituents, Enzyme activities, Dioscorea rotundata, Sprouting, Storage, Triadimefon (TDM)
doi:10.1631/jzus.2007.B0283             CLC number: S632

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