Fig. 1

The changes of morphology and microstructure of ARs after treatment of sucrose. a The morphology change of ARs in lotus seedlings after 20 mg/L and 60 mg/L sucrose treatment within 5 days (T20 or T60 represented seedlings treated with 20 mg/L or 60 mg/L sucrose for 1-5 d, CK represented the seedling growing in the water for 1-5 d). b The microstructure changes of the ARs in lotus seedlings after 20 mg/L sucrose treatment within 5s days by paraffin section (T20 represented seedlings treated with 20 mg/L sucrose for 1-5 d, CK represented the seedlings growing in the water for 1-5 d)