植物缺铁诱导型香豆素合成及其在铁吸收中的功能研究进展

doi:10.11983/CBB24106

植物学报 ›› 2025, Vol. 60 ›› Issue (3): 460-471.DOI: 10.11983/CBB24106 cstr: 32102.14.CBB24106

植物缺铁诱导型香豆素合成及其在铁吸收中的功能研究进展

周婧¹, 高飞²^,^*()

¹湖南农业大学生物科学技术学院, 长沙 410128
²湖南农业大学农学院, 长沙 410128

收稿日期:2024-07-17 接受日期:2024-12-14 出版日期:2025-05-10 发布日期:2024-12-27
通讯作者: *高飞, 博士, 湖南农业大学农学院副教授, 硕士生导师, 湖南省“百人计划”青年学者。长期从事植物铁吸收、转运、存储及其分子调控机制研究。利用多组学、遗传学、生物化学与分子生物学等手段挖掘鉴定相关关键基因, 揭示模式植物拟南芥以及水稻铁稳态调控的分子机理。近年来, 主持国家自然科学基金等省部级项目4项。以第一作者或通讯作者在The Plant Cell、Trends in Plant Science和Journal of Experimental Botany等国内外权威学术期刊发表论文10余篇。E-mail: gaofei@hunau.edu.cn
基金资助:
湖南省自然科学基金(2023JJ40325);湖南省自然科学基金(2023JJ40312);湖南省教育厅资助科研项目(22B0228);湖南省教育厅资助科研项目(22B0182)

Advances in Iron Deficiency-induced Coumarin Biosynthesis and Their Functions in Iron Absorption in Plants

Zhou Jing¹, Gao Fei²^,^*()

¹College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China
²College of Agronomy, Hunan Agricultural University, Changsha 410128, China

Received:2024-07-17 Accepted:2024-12-14 Online:2025-05-10 Published:2024-12-27
Contact: *E-mail: gaofei@hunau.edu.cn

摘要/Abstract

摘要： 香豆素类化合物是一类以苯并吡喃酮为母环结构的酚类化合物, 可分为简单香豆素和复杂香豆素, 广泛存在于自然界的高等植物中。研究表明, 缺铁条件下, 植物根部分泌的简单香豆素类化合物能够促进铁离子的吸收。该文对近年来发现和鉴定的植物缺铁诱导型香豆素合成及调控相关基因研究进展进行综述, 进一步详细阐述缺铁诱导型香豆素的生物合成、储存、分泌及其调控机制, 探讨其促进植物铁吸收的分子机制。同时, 展望该领域未来的研究方向。

关键词: 铁缺乏, 香豆素类化合物, 生物合成, 调控, 铁吸收

Abstract: Coumarins are a class of phenolic compounds with benzopyrones as the parent ring structure, categorized into simple and complex coumarins, and widely distributed in higher plants. In recent years, studies have shown that root-secreted coumarins can promote iron absorption in plants. Here, the recent progress in the discovery and identification of genes related to the biosynthesis and regulation of plant iron deficiency-induced coumarins is reviewed, and the molecular mechanisms of the biosynthesis, storage, secretion, and regulation of iron deficiency-induced coumarins are further elaborated. The mechanism by which coumarins could promote plant iron uptake has also been discussed. Finally, this paper provides a preliminary outlook on the future research directions to gain knowledge of these mechanisms, which could offer novel opportunities to generate iron deficiency-tolerant crops and iron-biofortified crops.

Key words: iron deficiency, coumarin, biosynthesis, regulation, iron uptake

周婧, 高飞. 植物缺铁诱导型香豆素合成及其在铁吸收中的功能研究进展. 植物学报, 2025, 60(3): 460-471.

Zhou Jing, Gao Fei. Advances in Iron Deficiency-induced Coumarin Biosynthesis and Their Functions in Iron Absorption in Plants. Chinese Bulletin of Botany, 2025, 60(3): 460-471.

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链接本文: https://www.chinbullbotany.com/CN/10.11983/CBB24106

https://www.chinbullbotany.com/CN/Y2025/V60/I3/460

图/表 3

图1 拟南芥缺铁诱导型香豆素类化合物生物合成途径 PAL: 苯丙氨酸解氨酶; C4H: 肉桂酸-4-羟化酶; 4CL: 4-香豆酸:辅酶A连接酶; HCT: 羟基肉桂酰辅酶A莽草酸/奎宁酸羟基肉桂酰转移酶; C3′H: 4-香豆酰莽草酸/奎宁酸3′-羟化酶; CCoAOMT: 咖啡酰辅酶A O-甲基转移酶; F6′H1: 阿魏酰辅酶A 6′-羟化酶; COSY: 香豆素合成酶; S8H: 莨菪亭8-羟化酶; CYP82C4: 细胞色素P450家族酶

Figure 1 Biosynthesis pathways of iron deficiency-induced coumarins in Arabidopsis PAL: Phenylalanine ammonia-lyase; C4H: Cinnamate-4-hydroxylase; 4CL: 4-coumarate:CoA ligases; HCT: Hydroxycinnamoyl-CoA shikimate/quinate hydroxycinnamoyl transferase; C3′H: 4-coumaroyl shikimate/quinate 3′-hydroxylase; CCoAOMT: Caffeoyl-CoA O-methyltransferase; F6′H1: Feruloyl-CoA 6′-hydroxylase; COSY: Coumarin synthase; S8H: Scopoletin 8-hydroxylase; CYP82C4: Cytochrome P450 family enzymes

表1 缺铁诱导型香豆素类化合物合成与调控相关基因

Table 1 Genes responsible for the biosynthesis and regulation of iron deficiency-induced coumarins

功能分类	基因	功能	缺铁应答	参考文献
香豆素前体合成	PAL	反式肉桂酸合成	诱导型	Rodríguez-Celma et al., 2013
	C4H	4-香豆酸合成	诱导型	Rodríguez-Celma et al., 2013
	4CL1/2	香豆酰辅酶A合成	诱导型	Rodríguez-Celma et al., 2013
	HCT	咖啡酰辅酶A合成	诱导型	Rodríguez-Celma et al., 2013
	CCoAOMT1	阿魏酰辅酶A合成	诱导型	Rodríguez-Celma et al., 2013
香豆素合成	F6H'1	6'-羟基阿魏酰辅酶A合成	诱导型	Kai et al., 2008; Schmid et al., 2014
	COSY	莨菪亭合成	诱导型	Vanholme et al., 2019
	S8H	秦皮素合成	诱导型	Siwinska et al., 2018; Tsai et al., 2018
	CYP82C4	Sideretin合成	诱导型	Murgia et al., 2011
香豆素分泌	PDR9	香豆素类化合物外排分泌	诱导型	Rodríguez-Celma et al., 2013; Fourcroy et al., 2014
	BGLU42	莨菪苷去糖基化	诱导型	Ziegler et al., 2017
调控	FIT	正调控香豆素合成	诱导型	Schmid et al., 2014; Ziegler et al., 2016
	MYB72	正调控香豆素合成	诱导型	Stringlis et al., 2018
	MYB63	正调控香豆素合成	?	DeLoose et al., 2024
	bHLH121	正调控香豆素合成	组成型	Gao et al., 2020a
	MYB15	正调控香豆素合成	?	Schwarz and Bauer, 2020
	KFB1	正调控香豆素合成	诱导型	Zhang et al., 2015; Chezem et al., 2017
	KFB20	正调控香豆素合成	诱导型	Zhang et al., 2015; Chezem et al., 2017
	KFB50	正调控香豆素合成	诱导型	Zhang et al., 2015; Chezem et al., 2017

图2 拟南芥缺铁诱导型香豆素类化合物合成调控 PAL、C4H、4CL、HCT、C3′H、CCoAOMT1、F6′H1、COSY、S8H和CYP82C4同图1。IVc bHLH: 拟南芥IVc bHLH亚家族转录因子; Ib bHLH: 拟南芥Ib bHLH亚家族转录因子; FIT: 拟南芥bHLH29转录因子

Figure 2 Regulation of iron deficiency-induced coumarin biosynthesis in Arabidopsis The legends of PAL, C4H, 4CL, HCT, C3′H, CCoAOMT1, F6′H1, COSY, S8H, and CYP82C4 are the same as shown in Figure 1. IVc bHLH: Arabidopsis IVc bHLH subfamily transcription factors; Ib bHLH: Arabidopsis Ib bHLH subfamily transcription factors; FIT: Arabidopsis bHLH29 transcription factor

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植物缺铁诱导型香豆素合成及其在铁吸收中的功能研究进展

Advances in Iron Deficiency-induced Coumarin Biosynthesis and Their Functions in Iron Absorption in Plants

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