Elimination of FRDL1, a xylem-located citrate transporter, confers tolerance to excess unchelated ferrous iron through an exclusion mechanism in rice (Oryza sativa L.)

Ueda, Yoshiaki

doi:https://doi.org/10.1111/plb.70107

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Elimination of FRDL1, a xylem-located citrate transporter, confers tolerance to excess unchelated ferrous iron through an exclusion mechanism in rice (Oryza sativa L.)

https://jircas.repo.nii.ac.jp/records/2000947

名前 / ファイル	ライセンス	アクション
2000947 (477.9 KB)

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国際農研デフォルトアイテムタイプ（フル）(1)

公開日

2025-09-03

タイトル

Elimination of FRDL1, a xylem-located citrate transporter, confers tolerance to excess unchelated ferrous iron through an exclusion mechanism in rice (Oryza sativa L.)

言語

作成者

Ueda, Yoshiaki

ORCID 0000-0002-4304-368X

en	Ueda, Yoshiaki ISNI Japan International Research Center for Agricultural Sciences 0000000121078171

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open access

アクセス権URI

http://purl.org/coar/access_right/c_abf2

権利情報

権利情報Resource

http://creativecommons.org/licenses/by/4.0/

権利情報

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

主題

citrate, ferrous iron, FRDL1, iron toxicity, leaf symptoms, rice

内容記述

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Abstract

内容記述

•Iron (Fe) toxicity is a common agricultural problem that limits rice yield in various regions of Southeast Asia and Africa. Previous studies have proposed physiological mechanisms for tolerance, but the specific genes associated with these mechanisms are largely unknown.
•In this study, I hypothesized that organic acids play a crucial role in Fe toxicity tolerance in rice and evaluated retrotransposon-insertion mutant lines of citrate transporters under Fe toxicity stress in hydroponics. Fe toxicity-induced leaf bronzing and Fe concentrations were measured.
•A knock-down line of the xylem-localized citrate transporter, FRDL1, had a significantly lower degree of leaf bronzing symptoms under Fe toxicity when unchelated ferrous iron (Fe²⁺, as FeSO₄), but not chelated ferric iron (as Fe(III)-EDTA), was used as Fe source. The knock-down line of FRDL1 had lower Fe concentrations in leaf blades, while concentrations in stems and roots were unaffected under excess ferrous iron conditions.
Knock-down of FRDL1 also reduced foliar Fe concentrations and leaf bronzing symptoms in Ciherang, an indica variety that is highly sensitive to Fe toxicity stress.
•This study highlights that low xylem citrate concentrations restrict translocation of excess Fe to leaves, suggesting a novel physiological aspect for improved Fe toxicity tolerance in rice. This study also suggests that selection of the Fe source is crucial in Fe toxicity experiments.

言語

出版者

John Wiley & Sons

日付

2025-06-17

日付タイプ

Accepted

言語

eng

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資源タイプ識別子

http://purl.org/coar/resource_type/c_6501

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journal article

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VoR

出版タイプResource

http://purl.org/coar/version/c_970fb48d4fbd8a85

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2025-09-03 06:17:38.619706

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Elimination of FRDL1, a xylem-located citrate transporter, confers tolerance to excess unchelated ferrous iron through an exclusion mechanism in rice (Oryza sativa L.)

× Ueda, Yoshiaki

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