文献类型： 外文期刊
作者： Wei, Ruonan 1 ; Ma, Lei 2 ; Lu, Xu 3 ; Xu, Ling 1 ; Feng, Xiaojie 1 ; Ma, Yantong 1 ; Li, Sheng 4 ; Ma, Shaoying 5 ; Chai, Qiang 6 ; Zhang, Xucheng 7 ; Yang, Xiaoming 8 ;
作者机构： 1.Gansu Agr Univ, Coll Life Sci & Technol, Lanzhou 730070, Peoples R China
2.Gansu Agr Univ, Agron Coll, Lanzhou 730070, Peoples R China
3.Gansu Agr Univ, Coll Hort, Lanzhou 730070, Peoples R China
4.Gansu Agr Univ, Coll Hort Coll Life Sci & Technol, State Key Lab Aridland Crop Sci, Lanzhou 730070, Peoples R China
5.Gansu Agr Univ, Basic Expt Teaching Ctr, Lanzhou 730070, Peoples R China
6.Gansu Agr Univ, State Key Lab Aridland Crop Sci, Lanzhou 730070, Peoples R China
7.Gansu Acad Agr Sci, Dryland Agr Inst, Lanzhou 730070, Peoples R China
8.Gansu Acad Agr Sci, Crop Res Inst, Lanzhou 730070, Peoples R China
关键词： Root; Starch grains; IAA; Ca2+; ROS
期刊名称：PLANT GROWTH REGULATION （ 影响因子：4.2； 五年影响因子：4.0 ）
ISSN： 0167-6903
年卷期： 2023 年
页码：
收录情况： SCI
摘要： Plants cannot grow or develop properly without the support of their roots. Gravity plays an essential role in the formation of the root structure, but it is not clear how roots respond to gravity signals or how downward growth occurs. The two best-known models for root gravity sensing affirm the importance of starch. After the hyper-sensitive root crown perceives a gravity signal, starch granules within the rootlet cells settle to the endoplasmic reticulum in the direction of the signal, where they bind to specific receptors or open ion channels and release downstream signaling molecules. This triggers a series of signal transduction mechanisms, and this process involves signaling molecules such as indole-3-acetic acid (IAA), reactive oxygen species, and calcium signaling, which ultimately induce groundward root growth. This review summarizes the mechanism of action underlying, and a research overview of, how plant roots sense and respond to gravity. The role of key signals such as starch, IAA, and calcium ions in root gravitropism is analyzed by integrating available information. The results provide a more complete theoretical basis for how roots grow toward gravity, which will contribute to our understanding of gravitropism and lay the foundation for discovering new directions of scientific research. [GRAPHICS]
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