Assertion: ethylene's effect | /r/HasProperty | grown under darkness
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text: For example, such a PIF/COP/HY5-mediated network appears to control the opposite effects induced by ethylene on hypocotyl elongation of etiolated Arabidopsis seedlings when grown under darkness (elongation promotion) or light exposure (elongation repression; Feng et al., 2008; Liang et al., 2012).