Abstract
Adventitious roots (ARs) are important for the growth of plants and the improvement in their stress resistance and survival capacity. Although many genes have been confirmed to be involved in adventitious root (AR) formation in Arabidopsis and tomato plants, MADS-box genes have rarely been mentioned. Here, we isolated a MADS-box gene named SlMADS83, which may negatively regulate AR formation in tomato plants, as the number of the ARs formed in the transgenic lines in which the SlMADS83 gene was silenced by RNA interference (RNAi) was increased. The above phenotype was further confirmed by the analysis of the macroscopic, anatomical, and molecular features and related statistical data. Previous Studies have proven that auxin can stimulate early AR primordium initiation. Interestingly, in the RNAi transgenic lines, the concentration of auxin in the hypocotyl base was increased, resulting in early induction of AR primordia initiation, promoting the formation of ARs. Briefly, SlMADS83 may play an important role in AR formation.
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Abbreviations
- RNAi:
-
RNA interference
- IAA:
-
Indole-3-acetic acid
- ACC:
-
1-Aminocyclopropane-1-carboxylate
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Acknowledgements
This work was supported by National Natural Science Foundation of China (No. 31572129) and the Natural Science Foundation of Chongqing of China (No. cstc2015jcyjA80026).
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Z.H. and G.C. designed the research; A.L., Y.W., and H.L. performed the research; A.L. wrote the paper; Z.H. modified the paper. All authors have read and approved the final version of the manuscript.
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Supplementary material 4 (DOCX 16 kb) Supplementary Table S2. Relative potential MADS binding sites (GArG motifs) in the promoter sequences.
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Li, A., Chen, G., Wang, Y. et al. Silencing of the MADS-Box Gene SlMADS83 Enhances Adventitious Root Formation in Tomato Plants. J Plant Growth Regul 39, 941–953 (2020). https://doi.org/10.1007/s00344-019-10035-w
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DOI: https://doi.org/10.1007/s00344-019-10035-w