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Fig. 7. | BMC Biology

Fig. 7.

From: What are karrikins and how were they ‘discovered’ by plants?

Fig. 7.

Possible evolution of the karrikin response system in plants. The KAI2 gene can be traced back to single-celled algae. Gene duplication before the evolution of seed plants leading to DWARF14 genes probably provided the opportunity for functional specialisation of KAI2-type genes, including roles in the response to karrikins and the response of parasitic plants to host-derived strigolactones. The origin of strigolactones is unclear since mosses are reported to produce them. Karrikin-like signals distinct from strigolactones probably have an ancient origin

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