Recently, the team of Hu Yuxin, a researcher at the Institute of Botany, Chinese Academy of Sciences, published the latest research results in the Proceedings of the National Academy of Sciences. The study found that the calcium signaling complex CaM-IQM is an important factor in

2024/05/1106:18:32 science 1521

Recently, the team of Hu Yuxin, a researcher at the Institute of Botany, Chinese Academy of Sciences, published the latest research results in the Proceedings of the National Academy of Sciences. The study found that the calcium signaling complex CaM-IQM is an important factor in - DayDayNews

Recently, the team of Hu Yuxin, a researcher at the Institute of Botany, Chinese Academy of Sciences, published the latest research results in " Proceedings of the National Academy of Sciences ". The study found that the calcium signal complex CaM-IQM regulates auxin -induced callus and lateral roots. important factor in its formation.

plant cells have high totipotency, which gives plants extremely strong regeneration ability under living and in vitro conditions. Currently, the plant in vitro regeneration system developed based on the totipotency of plant cells has been widely used in plant biotechnology and genetic improvement. In the classic in vitro plant regeneration system, auxin-induced callus formation is the first step in in vitro regeneration. It has always been considered to be the process of dedifferentiation of plant cells to obtain totipotency, and it also determines to a large extent The regenerative capacity of plants.

Recent studies have shown that auxin-induced callus formation is achieved through the root development pathway, during which activation of signature genes in root stem cells is necessary for de novo organ regeneration. Calcium signaling is an important cell signal in eukaryotes and participates in regulating multiple processes of development and environmental response. The culture media currently used for plant regeneration in vitro contain relatively high concentrations of the calcium ion component. However, so far, it is unclear whether calcium signaling is involved in the regulation of callus formation and plant regeneration ability.

Recently, the team of Hu Yuxin, a researcher at the Institute of Botany, Chinese Academy of Sciences, published the latest research results in the Proceedings of the National Academy of Sciences. The study found that the calcium signaling complex CaM-IQM is an important factor in - DayDayNews

Institute of Botany, Chinese Academy of Sciences Hu Yuxin’s research group discovered during the process of identifying important factors that regulate the ability of plant callus formation that a dominant negative mutation of Arabidopsis calmodulin (CaM) binding protein IQM5 significantly inhibited the healing of various organs. Injury tissue formation ability. Studies have shown that deletion of members of the calcium signaling module CaM-IQM in Arabidopsis leads to defects in callus and lateral root formation. Further research found that the calcium signaling module CaM-IQM can interact with IAAs, the key inhibitors of auxin signaling, in a calcium ion-dependent manner, releasing the inhibitory effect of IAAs on the auxin response factor ARF7 in the pathway, thus affecting the downstream control of lateral roots. and the expression of key factors for callus formation to promote the formation of lateral roots and callus.

This study not only found that the calcium signaling complex CaM-IQM is an important factor in regulating auxin-induced callus and lateral root formation, but also revealed a molecular pathway in which calcium signaling and auxin signaling interact to regulate plant regeneration and development. The findings have implications for a deeper understanding of the function of calcium signaling in plant regeneration and development.

The research results were published online in the international academic journal PNAS. Zhang Shiqi, a doctoral candidate at the Institute of Botany, is the first author of the paper, and researcher Hu Yuxin and Xu Chongyi are the corresponding authors. This research was funded by the National Natural Science Foundation of China and the Chinese Academy of Sciences.

related paper information:

https://doi.org/10.1073/pnas.2202669119

Source: Chinese Science Journal

Recently, the team of Hu Yuxin, a researcher at the Institute of Botany, Chinese Academy of Sciences, published the latest research results in the Proceedings of the National Academy of Sciences. The study found that the calcium signaling complex CaM-IQM is an important factor in - DayDayNews

Editor: Jiang Jiang Typesetting: Xiaotong

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