Research Progress in the Interactions of Strigolactone with Hormones on Regulating Root Growth

doi:10.13560/j.cnki.biotech.bull.1985.2022-0102

Abstract

Abstract:

As a novel kind of phytohormones of regulating plant root system,strigolactone plays an important role in stimulating the seed germination of parasitic plants,promoting the branching of arbuscular mycorrhizal fungi and regulating the plant shoot branching. The root system is a vital organ for plants to sense the signals of the soil and absorb the nutrients,water and mineral elements,and its development and growth are affected by both external environment and endogenous hormones. Strigolactone inhibits the transportation of auxin and thus increases the size of the meristem and transition zones to regulate the elongation of the primary root,and to suppress the occurrence of the lateral root primordia and the development of the lateral root,which depends on the receptor of cytokinin AHK3. Strigolactone also regulates root hair elongation by promoting the biosynthesis of ethylene,the transportation of auxin and the expression of the auxin receptor TIR1. Here we summarized the structures and functions of strigolactone,as well as its interactions with other hormones such as auxin and cytokinin to regulate the processes of the primary root elongation,lateral root formation and root hair formation and elongation. It is aimed to lay theoretical and practical evidences for further elucidating the regulation mechanism of strigolactone in plant root growth.

Key words: strigolactone, root growth, interactions among hormones

SHEN Yue, TAO Bao-jie, HUA Xia, LV Bing, LIU Li-jun, CHEN Yun. Research Progress in the Interactions of Strigolactone with Hormones on Regulating Root Growth[J]. Biotechnology Bulletin, 2022, 38(8): 24-31.

Figures/Tables 4

References 63

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功能 Function	生理/分子反应 Physiological/molecular response	参考文献 Reference
丛枝菌根真菌菌丝分枝	BRC1表达上调,促进养分胁迫下营养物质的吸收	[3,21⇓-23]
植物分枝	BRC1表达上调	[21]
种子萌发	激活CYP707A1表达,促进DELLA降解	[24-25]
主根发育及伸长	依赖MAX2,与生长素互作	[26-27]
侧根的形成	PIN1表达降低,与生长素、细胞分裂素互作	[27⇓⇓⇓⇓⇓⇓-34]
不定根的形成	生长素含量及敏感性降低、细胞分裂素含量增加	[35⇓-37]
根毛的发生与伸长	依赖MAX2,与生长素、乙烯互作	[27,31,38⇓⇓-41]
叶片衰老	SAG表达上调	[42]
调节植物次生生长	细胞分裂增强、形成层活性提高	[38,43]
光形态建成	与隐花色素、光敏色素STH7/BBX20互作	[44-45]
养分胁迫	PDR1表达上调	[46-47]
干旱胁迫	活性氧清除剂、诱导气孔关闭减少蒸腾作用	[48⇓-50]
低温胁迫	D10表达上调	[47]
盐胁迫	MDA、H₂O₂、ROS等含量降低	[51]
生物胁迫	增加对病原菌的敏感性	[52-53]

功能 Function	生理/分子反应 Physiological/molecular response	参考文献 Reference
丛枝菌根真菌菌丝分枝	BRC1表达上调,促进养分胁迫下营养物质的吸收	[3,21⇓-23]
植物分枝	BRC1表达上调	[21]
种子萌发	激活CYP707A1表达,促进DELLA降解	[24-25]
主根发育及伸长	依赖MAX2,与生长素互作	[26-27]
侧根的形成	PIN1表达降低,与生长素、细胞分裂素互作	[27⇓⇓⇓⇓⇓⇓-34]
不定根的形成	生长素含量及敏感性降低、细胞分裂素含量增加	[35⇓-37]
根毛的发生与伸长	依赖MAX2,与生长素、乙烯互作	[27,31,38⇓⇓-41]
叶片衰老	SAG表达上调	[42]
调节植物次生生长	细胞分裂增强、形成层活性提高	[38,43]
光形态建成	与隐花色素、光敏色素STH7/BBX20互作	[44-45]
养分胁迫	PDR1表达上调	[46-47]
干旱胁迫	活性氧清除剂、诱导气孔关闭减少蒸腾作用	[48⇓-50]
低温胁迫	D10表达上调	[47]
盐胁迫	MDA、H₂O₂、ROS等含量降低	[51]
生物胁迫	增加对病原菌的敏感性	[52-53]