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Crop Biotech Update

The Strawberry FaTPK1 Plays a Critical Role in Fruit Quality Formation

October 18, 2017

Potassium, an abundant cation in plant cells, is important in fruit development and plant resistance. However, how cellular potassium is directed by potassium channels in fruit development and quality formation of strawberry (Fragaria ananassa) is relatively unclear. Shufang Wang from China Agricultural University aimed to study this channel.

The team focused on a two-pore potassium (TPK) channel gene in strawberry, FaTPK1. Analysis showed that FaTPK1 is localized in the vacuole membrane. A transcription analysis also indicated that the expression level of FaTPK1 increased rapidly and was maintained at a high level in ripened fruit, suggesting that FaTPK1 is related to fruit quality formation.

The downregulation of FaTPK1 inhibited fruit ripening while overexpression of FaTPK1 promoted fruit ripening. This was demonstrated by the changes in firmness and the contents of soluble sugars, anthocyanin, and abscisic acid, as well as the transcript levels of ripening-regulated genes.

Thus, the strawberry TPK1 plays important roles in fruit ripening and quality formation.

For more information on this study, read the article in Plant Biotechnology Journal.