Silencing of α-amylase StAmy23 in potato tuber leads to delayed sprouting

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autorinnen und Autoren: Hou J, Liu T, Reid S, Zhang H, Peng X, Sun K, Du J, Sonnewald U, Song B
Zeitschrift: Plant Physiology and Biochemistry
Jahr der Veröffentlichung: 2019
Band: 139
Seitenbereich: 411-418
ISSN: 0981-9428


Potato tuber dormancy is critical for the postharvest quality. The supply of carbohydrates is considered as one of the important factors controlling the rate of potato tuber sprouting. Starch is the major carbohydrate reserve in potato tuber, but very little is known about the specific starch degrading enzymes responsible for controlling tuber dormancy and sprouting. In this study, we demonstrate that an α-amylase gene StAmy23 is involved in starch breakdown and regulation of tuber dormancy. Silencing of StAmy23 delayed tuber sprouting by one to two weeks compared with the control. This phenotype is accompanied by reduced levels of reducing sugars and elevated levels of malto-oligosaccharides in tuber cortex and pith tissue below the bud eye of StAmy23-deficient potato tubers. Changes in soluble sugars is accompanied by a slight variation of phytoglycogen structure and starch granule size. Our results suggest that StAmy23 may stimulate sprouting by hydrolyzing soluble phytoglycogen to ensure supply of sugars during tuber dormancy.

FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Reid, Stephen
Lehrstuhl für Biochemie
Sonnewald, Uwe Prof. Dr.
Lehrstuhl für Biochemie

Einrichtungen weiterer Autorinnen und Autoren

Henan Agricultural University / 河南农业大学


Hou, J., Liu, T., Reid, S., Zhang, H., Peng, X., Sun, K.,... Song, B. (2019). Silencing of α-amylase StAmy23 in potato tuber leads to delayed sprouting. Plant Physiology and Biochemistry, 139, 411-418.

Hou, Juan, et al. "Silencing of α-amylase StAmy23 in potato tuber leads to delayed sprouting." Plant Physiology and Biochemistry 139 (2019): 411-418.


Zuletzt aktualisiert 2019-16-05 um 12:53