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. 2020 Sep 20;19(2):375–393. doi: 10.1111/pbi.13473

Figure 8.

Figure 8

The model depicting the regulatory mechanism of the development and metabolism of tomato trichomes. (a) The trichome initiation requires woolly function, and JA signalling can promote the trichome initiation. woolly is involved in the initiation of almost all types of trichomes with indispensible role in type I, II and III, important role in type IV and V, and partial role in type VI and VII. (b) SlMYC1 regulates the morphology of the glandular cells, intermediate cells and the stalk cells of type VI trichomes. The mature type VI trichomes contain four glandular cells (in blue) where terpenes are mainly biosynthesized. The intermediate cell is shown in yellow, and the stalk cell is shown in brown. (c) The model depicting the regulatory mechanism of the cell division, expansion and metabolism in the glandular cells. wo‐MYC1 module regulates the terpene metabolism, and JA can promote the terpene biosynthesis through the degradation of JAZ2 that represses the wo‐MYC1 module. [Colour figure can be viewed at wileyonlinelibrary.com]