Anti-oxidative enzymes in relation to iron toxicity caused by differential soil ironcontent in winter rice (Oryza sativa) of Assam, India

MADHUSMITA  BARUAH; PRIYANKA  DAS; NILAY  BORA; SUNAYANA  RATHI; BORSHA  NEOG

doi:10.56093/ijas.v95i6.140840

Authors

MADHUSMITA BARUAH Assam Agricultural University, Jorhat, Assam 785 013, India
PRIYANKA DAS Assam Agricultural University, Jorhat, Assam 785 013, India
NILAY BORA Assam Agricultural University, Jorhat, Assam 785 013, India
SUNAYANA RATHI Assam Agricultural University, Jorhat, Assam 785 013, India
BORSHA NEOG Assam Agricultural University, Jorhat, Assam 785 013, India

https://doi.org/10.56093/ijas.v95i6.140840

Keywords:

Iron content, Oxidative enzymes, Specific activity, Total activity

Abstract

A study was conducted at Assam Agricultural University, Jorhat, Assam to know the effect of differential soil iron content on plant (leaves and grain) iron content together with the activities of some anti-oxidative enzymes, viz. peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT) in a few popular rice varieties of Assam. The result of the pot experiment under rain protected condition revealed that application of iron fertilizer to soil (1 L of 50 ppm FeSO₄.7H₂O to 6 kg soil) of initial soil iron content 159.40 mg/kg before planting led to increase in leaf iron content from 39.16 mg/100 g (control) to 45.36 mg/100 g (treated) at harvesting stage. However, no iron toxicity symptoms were observed which might be due to higher activities of CAT at maximum tillering stage and SOD at grain filling stage. The study revealed that the rice varieties Ranjit, Mahsuri and Kajoli chakua may respond to application of iron fertilization without producing iron toxicity symptom and yield more than 100% iron content in brown rice than that of control.

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