Fig. 1

Visual assessment of cucumber seedlings under low light and GR24 treatment conditions. Note: Photographs of the cucumber seedlings were taken at the end of different treatments. The growth of cucumber seedlings was significantly inhibited under different treatments for 7 d. Cont, 0 μM GR24 + 500 μmolm^− 2 s^− 1 PPFD; Cont+GR24, 10 μM GR24 + 500 μmolm^− 2 s^− 1 PPFD; LL, 0 μM GR24 + 60 μmolm^− 2 s^− 1 PPFD; LL + GR24, 0 μM GR24 + 60 μmolm^− 2 s^− 1 PPFD