滞绿基因SGR研究进展

doi:10.7525/j.issn.1673-5102.2026.01.001

摘要/Abstract

摘要：

STAY-GREEN（SGR）基因家族是调控植物叶绿素降解及叶片衰老的关键因子。该文对SGR基因家族进行系统进化分析，结果表明，该家族可分为SGR和SGRL 2个功能分化的亚家族，其成员数量在物种间存在差异，但蛋白结构高度保守。功能研究表明，SGR基因不仅通过调控叶绿素降解在植物生长发育中发挥核心作用，还广泛参与植物对非生物胁迫和生物胁迫的响应，且其功能常具有基因特异性。在分子机制层面，SGR基因作为枢纽节点，整合了脱落酸、乙烯、茉莉酸等激素信号，并通过调节活性氧代谢稳态和苯丙烷代谢途径，协同调控叶绿素降解与胁迫应答。该文系统地梳理了SGR基因介导的复杂调控网络，为深入解析其分子机理及利用基因编辑等技术靶向改良作物抗逆性和农产品品质提供重要的理论依据与研究方向。

关键词: 滞绿基因家族, 叶绿素代谢, 激素信号, 活性氧, 苯丙烷代谢

Abstract:

The STAY-GREEN（SGR） gene family is a key regulator of chlorophyll degradation and leaf senescence in plants. This study， through systematic phylogenetic analysis， demonstrated that the SGR gene family can be divided into two functionally divergent subfamilies， SGR and SGRL. The number of family members varied among species， yet the protein structure was highly conserved. Functional studies revealed that SGR not only played a central role in plant growth and development by regulating chlorophyll degradation but also extensively participated in responses to abiotic and biotic stresses， often in a gene-specific manner. At the molecular level， SGR gene served as a hub integrating multiple hormone signals， including abscisic acid， ethylene， and jasmonic acid， and coordinated chlorophyll degradation and stress responses by modulating the homeostasis of reactive oxygen species and phenylpropane metabolism pathways. This article reviewed the complex regulatory network mediated by SGR gene， providing important theoretical foundations and research directions for elucidating its molecular mechanisms and for targeted improvement of crop stress resistance and agricultural product quality using gene-editing technologies.

Key words: Stay-Green gene family, chlorophyll metabolism, hormone signal, reactive oxygen species, phenylpropane metabolism

中图分类号:

Q786

何林林, 吴磊, 任雪松, 司军, 李勤菲, 宋洪元. 滞绿基因SGR研究进展[J]. 植物研究, 2026, 46(1): 1-12.

Linlin HE, Lei WU, Xuesong REN, Jun SI, Qinfei LI, Hongyuan SONG. Progress in the Study on Stay-green Gene SGR[J]. Bulletin of Botanical Research, 2026, 46(1): 1-12.

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物种 Species	基因名称 Gene name	登录号/基因ID Accession number/Gene ID
水稻 Oryza sativa	OsSGR	NP_001063758
水稻 Oryza sativa	OsSGRL	NP_001054370
玉米 Zea mays	ZmSGR1	ACG27475
	ZmSGR2	NP_001105771
	ZmSGRL	NP_001130909
高粱 Sorghum bicolor	SbSGR	AAW82958
高粱 Sorghum bicolor	SbSGRL	XP_002448084
苜蓿 Medicago sativa	MtSGR	AEE0020
烟草 Nicotiana tabacum	NtSGR	ABY19382
豌豆 Pisum sativum	PsSGR	BAF76351
拟南芥 Arabidopsis thaliana	AtSGR1	At4g22920
	AtSGR2	At4g11910
	AtSGRL	At1g44000
番茄 Solanum lycopersicum	SlSGR1	Solyc08g080090.2.1
	SlSGR2	Solyc12g056480.1.1
	SlSGRL	Solyc04g063240.2.1
大豆 Glycine max	GmSGR1	Glyma11g02980.1
	GmSGR2	Glyma01g42390.1
	GmSGR3a	Glyma17g14201.2
	GmSGR3b	Glyma17g14210.2
	GmSGRL	XP_003523416
甘蓝 Brassica oleracea var. capitata	BoSGR1-C01/C03/C07	Bol014983/Bol010654/Bol042063
	BoSGR2-C03	Bol030516
	BoSGRL-Scaffold000269	Bol006958
欧洲油菜 B. napus	BnaSGR1a-A01	BnaA01g12570D
	BnaSGR1b-A01	BnaA01g22870D
	BnaSGR1-A03/A08	BnaA03g45630D/BnaA08g10510D
	BnaSGR1-Cnn	BnaCnng29210D
	BnaSGR1-C01/C07	BnaC0lg14360D/BnaC07g37710D
	BnaSGR2-A03/C03	BnaA03g24900D/BnaC03g72930D
	BnaSGRL-A10/CO6	BnaA10g08850D/BnaC06g00560D
白菜 B. rapa	BraSGRla-A01	Bra013656
	BraSGR1b-A01	Bra028385
	BraSGR1-A03/A08	Bra019346/Bra020829
	BraSGR2-A03	Bra000755
	BraSGRL-Scaffold000123	Bra036938