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Fig. 8 | BMC Plant Biology

Fig. 8

From: Full-length transcriptome analysis of shade-induced promotion of tuber production in Pinellia ternata

Fig. 8

Putative gene interaction model for tuber growth of P. ternata in a shaded environment. A shaded environment suppresses light signaling and increases the photosynthetic efficiency by repressing PtHY5 expression and increasing the transcripts of PtPIF3, PtCAB151, and PtRUB, which not only promote tuber growth directly, but also reduces ROS content via remitting photoinhibition, thereby delaying STF and facilitating tuber growth indirectly. The reduction in PtHY5 expression causes auxin signaling by up-regulating the expression of PtPIN1, PtPIN6, PtARF1, and PtARF19 which further increases the expression of PtXET, PtRGP, and PtSUS, accelerating tuber growth. Additionally, the induction of PtCAT and PtGR in a shaded environment promotes tuber growth by indirectly eliminating ROS accumulation while the up-regulation of PtCHS expedites tuber growth

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