Iron Acquisition and Partitioning to Grain in Rice Germplasm Accessions Grownunder Aerobic Condition

摘要

Iron (Fe) deficiency is a common nutritional problem in cultivation of aerobic rice, consequently resulting in low grain Fe. Characterisation of selected aerobically grown rice accessions showed significant variability in Fe levels in root, shoot, leaves and grain at flag leaf and grain filling (70 and 110 days after planting, respectively) stage. PS- 360 and PS-380 genotypes showed significantly higher level of grain Fe compared to other genotypes. However, there was no strong correlation between shoot and grain iron content and also between Fe remobilization efficiency with grain Fe content. This signifies that, high grain Fe genotypes continues to access iron from roots during grain filling period, besides, remobilization from shoots. The physiological and molecular basis for Fe acquisition and transport was investigated.