Growth responses of seedlings under complete submergence in rice cultivars carrying both the submergence-tolerance gene SUB1A-1 and the floating genes SNORKELs

We screened 80 Asian rice (Oryza sativa L.) cultivars for the presence of submergence-tolerance gene SUB1A-1 and floating genes SNORKEL1 (SK1) SNORKEL2 (SK2), found that deepwater cultivar Baisbish (BSB) submergence-tolerant Flood Resistant 13A (FR13A) both possess SK1/2. When BSB FR13A seedlings were completely submerged, spindly growth shoots was induced in but not FR13A. Submergence significantly increased transcript abundance shoots, expression level much lower than also ERF66 ERF67, transcriptional targets SUB1A-1, whereas it upregulated ERF67 shoots. These results suggest could display submergence tolerance due to low and/or under submergence.