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Excess of reduced iron (Fe 2+ ) will affect the plant growth of rice when it is grown under waterlogged condition. Some rice genotypes have been identified tolerance to iron toxicity with different mechanism-type of tolerance. This study aims to identify the response of some rice genotypes to iron toxicity, and to evaluate their consistency in the greenhouse screening method and the field condition. The experiments were conducted in iron toxicity hotspot area, Banyuasin (South Sumatera) and the control as irrigated rice field was in Sukamandi (West Java). The green house experiment of Fe toxicity was done using 400 ppm of Iron with Yoshida Agar Solution method. The response of rice plant to iron toxicity was observed on leaf bronzing score (LBS), iron content and uptake, biomass, yield and yield components and stress tolerant index (STI). We found that there was not clear relationship between the iron content with the leaf bronzing symptom depending on type of tolerant while the stress tolerance index was corelated with the yield. There were two varieties was identified as tolerant, namely Cilamaya Muncul as includer tolerant genotype and Awan Kuning as the excluder tolerant genotype. The information of the distinct response those rice germplasms can be used for recommendation for further study and development of rice tolerant to iron toxicity condition.

Response of Indonesian rice varieties to iron toxicity under field and green house condition