As the last stage of plant development, leaf senescence has a great impact on plant's life cycle. Genetic manipulation of leaf senescence has been used as an efficient approach in improving the yield and quality of crop plants. Here we describe an ethyl methane sulfonate (EMS) mutagenesis induced premature leaf senescence mutant () in common tobacco ( L.). The plants displayed early leaf yellowing. Physiological parameters and marker genes expression indicated that the phenotype was caused by premature leaf senescence. Genetic analyses indicated that the phenotype was controlled by a single recessive gene that was subsequently mapped to a specific interval of tobacco linkage group 11 using simple sequence repeat (SSR) markers. Exogenous plant hormone treatments of leaves showed that the mutant was more sensitive to ethylene and jasmonic acid than the wild type. No similar tobacco premature leaf senescence mutants have been reported. This study laid a foundation for finding the gene controlling the mutation phenotype and revealing the molecular regulation mechanism of tobacco leaf senescence in the next stage.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6843228 | PMC |
| http://dx.doi.org/10.3390/plants8100415 | DOI Listing |
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