| Autor: |
Wang, Lihui, Wu, Bo, Chen, Guoyu, Chen, Hui, Peng, Yuquan, Sohail, Hamza, Geng, Shouyu, Luo, Guangbao, Xu, Dandi, Ouyang, Bo, Bie, Zhilong |
| Zdroj: |
Horticulture Research; January 2023, Vol. 10 Issue: 1 |
| Abstrakt: |
Tomato (Solanum lycopersicum) is among the most important vegetables across the world, but cold stress usually affects its yield and quality. The wild tomato species Solanum habrochaitesis commonly utilized as rootstock for enhancing resistance against abiotic stresses in cultivated tomato, especially cold resistance. However, the underlying molecular mechanism remains unclear. In this research, we confirmed that S. habrochaitesrootstock can improve the cold tolerance of cultivated tomato scions, as revealed by growth, physiological, and biochemical indicators. Furthermore, transcriptome profiling indicated significant differences in the scion of homo- and heterografted seedlings, including substantial changes in jasmonic acid (JA) biosynthesis and signaling, which were validated by RT–qPCR analysis. S. habrochaitesplants had a high basal level of jasmonate, and cold stress caused a greater amount of active JA-isoleucine in S. habrochaitesheterografts. Moreover, exogenous JA enhanced while JA inhibitor decreased the cold tolerance of tomato grafts. The JA biosynthesis-defective mutant spr8also showed increased sensitivity to cold stress. All of these results demonstrated the significance of JA in the cold tolerance of grafted tomato seedlings with S. habrochaitesrootstock, suggesting a future direction for the characterization of the natural variation involved in S. habrochaitesrootstock-mediated cold tolerance. |
| Databáze: |
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