photoinduce
/ˌfəʊtəʊɪnˈdjuːs/ /ˌfəʊtəʊɪnˈdʒuːs/verb
[with object] To induce by the action of light; especially (Plant Physiol. ) to induce reproductive behaviour in (a plant) by an appropriate sequence of light and darkness (also with the behaviour as object).
Origin
1940s; earliest use found in The Botanical Gazette. From photo- + induce, after photoinduced, photoinduction.