Abstract For aftermath cabernet sauvignon 2017 photoautotrophic plants, light-dependent photosynthesis plays an important role in organismal growth and development.Under light, Arabidopsis hypocotyl growth is promoted by the phytohormone ethylene.Despite well-characterized ethylene signaling pathways, the functions of light in the hormone-inducible growth response still remain elusive.Our cell-based functional and plant-system-based genetic analyses with biophysical and chemical tools showed that a chemical blockade of photosystem (PS) II activity affects ethylene-induced hypocotyl response under light.
Interestingly, ethylene responsiveness modulates PSII activity in retrospect.The lack of ethylene responsiveness-inducible PSII hp 14a-na0031wm inefficiency correlates with the induction of AKIN10 expression.Consistently, overexpression of AKIN10 in transgenic plants suppresses ethylene-inducible hypocotyl growth promotion under illumination as in other ethylene-insensitive mutants.Our findings provide information on how ethylene responsiveness-dependent photosynthetic activity controls evolutionarily conserved energy sensor AKIN10 that fine-tunes EIN3-mediated ethylene signaling responses in organ growth under light.