Increase in root branching enhanced ferric-chelate reductase activity under iron stress in potato (Solanum tuberosum)

CLARISSA CHALLAM; SOM DUTT; DURAIALAGARAJA SUDHAKAR; MUTHURAJAN RAVEENDRAN; TANUJA BUCKSETH; RAJESH KUMAR SINGH

doi:10.56093/ijas.v91i11.118577

Authors

CLARISSA CHALLAM Regional Station, ICAR-Central Potato Research Institute, Shillong, Meghalaya, India
SOM DUTT Regional Station, ICAR-Central Potato Research Institute, Shillong, Meghalaya, India
DURAIALAGARAJA SUDHAKAR Centre for Plant Biotechnology and Molecular Biology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu
MUTHURAJAN RAVEENDRAN Centre for Plant Biotechnology and Molecular Biology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu
TANUJA BUCKSETH Regional Station, ICAR-Central Potato Research Institute, Shillong, Meghalaya, India
RAJESH KUMAR SINGH Regional Station, ICAR-Central Potato Research Institute, Shillong, Meghalaya, India

https://doi.org/10.56093/ijas.v91i11.118577

Keywords:

Fe-deficiency, Ferric-chelate reductase, Lateral root, Potato

Abstract

In response to Fe-deficiency, various dicots increase their root branching to improve ferric-chelate reductase activity. It still remains unclear, whether the response caused by Fe-deficiency ultimately improves the plant's ability to withstand Fe-deficiency. In this experiment conducted at ICAR-Central Potato Research Institute, Regional Station, Shillong during 2020, we demonstrated a substantial increase in the growth of the lateral root of potato genotype (CP 3443), when grown in the iron-stress, in relation to control plants, and the total lateral root number is well linked to ferric-chelate reductase (FCR) activity. These findings showed that FCR is involved in root Fe uptake in potato (Solanum tuberosum L.) and they suggest a role in Fe distribution throughout the plant. In view of these findings, the Fe-deficiency induced increases in the lateral roots suggested that these play a significant role in Fe-deficiency tolerance in potato, which can serve as useful trait for the identification of chlorosis tolerance and/or nutrient-deficiency stress.

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