作者列表：Youlin Chang, Cheng Wang, Jing Zhang, Xiaodan Zhang, Yanqiang Gao, Ning Ma, Jianming Xie

影响因子：5.6

期刊：INTERNATIONAL DENTAL JOURNAL

发表时间：2026-5-15

DOI:10.1016/j.identj.2026.109605

文献主题：Abstract

Background: Glycine betaine （GB） not only plays an important role as an osmotic regulator in the regulation of abiotic stress in plants, but also serves as a methyl donor that affects the methylation level of the plant, which in turn affects its growth, development ａnd response to adversity. Tomato as a major crop cultivated in facilities, facility soil salinization has become an important factor limiting efficient ａnd high qualities tomato production. In contrast, little has been reported on the effect of GB on m6A methylation ａnd its salt tolerance in tomato. In this study, the effects of exogenous GB on chlorophyll synthesis, photosynthesis ａnd m6A methyltransferase in tomato under salt stress were investigated using tomato as experimental material.

 

Results: The results showed that 5 mM GB pretreatment alleviated the inhibitory effect of salt stress on the growth of tomato plants. GB promotes the synthesis ａnd accumulation of Proto IX, Mg-Proto IX ａnd protochlorophyllide in the chlorophyll synthesis pathway under salt stress by protecting the activities of CHLH （Magnesium-binding enzyme H subunit） ａnd POR （protochlorophyllide oxidoreductase） thereby increasing the chlorophyll content. In addition, GB improves photosynthetic capacity of tomato by increasing stomatal opening ａnd protecting Calvin cycle enzyme activity. And GB altered the expression level of m6A methyltransferase, which in turn indirectly affected the salt tolerance of tomato.

 

Conclusions: In summary, GB may enhance tomato salt tolerance by promoting chlorophyll synthesis, enhancing photosynthesis, ａnd regulating the expression levels of m6A methyltransferase genes. These findings suggest that exogenous GB application could serve as an effective strategy to improve tomato productivity in salinized protected cultivation systems.

 

Keywords: Chlorophyll; Glycine betaine; Photosynthesis; Salt stress; m6A methyltransferase.

 

© 2026. The Author（s）.