Irrigated rice genotype performance under excess iron stress in hydroponic culture

Abstract

Iron stress is a major stress factor in irrigated rice. The complete mechanism underlying iron metabolism andtransport is still unknown. Irrigated rice (Oryza sativa L.) cultivars were exposed to Fe2+ stress in hydroponic conditions,aiming to assess genotype performance under stress as well as to develop a protocol for genotype selection. The experimentaldesign was completely randomized, using a triple factorial scheme 2 x 5 x 6 (time x dose x genotype). The trait shoot length andnine days under stress were favorable for genotype discrimination under iron stress. The genotypes BR IRGA 409 and BRSAGRISUL were, respectively, the most sensitive and tolerant genotypes to iron stress. According to the genotype performance,hydroponics can be recommended as an efficient cultivation technique for the selection of iron stress-tolerant rice genotypes.

Keywords

• Oryza sativa L.
• Fe2+
• controlled conditions
• plantlet traits.