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Actin dynamics is pivotal in controlling cotton fiber elongation and the onset of secondary wall biosynthesis. We report that overexpression of GhACTIN1 under fiber fiber-specific promoter, GhSCFP, improves cotton fiber length, strength, and micronaire value. However, the effect of transgene has a more positive effect on fiber strength and micronaire value than fiber length. F-actin quantification and cellulose contents measurement in transgenic developing cotton fiber during the elongation phase showed an increase of up to 8.7% and 4.7% respectively. Additionally, physiological factors such as water use efficiency showed no significant change in transgenic cotton lines, while stomatal conductance and photosynthetic rate were significantly increased. Moreover, agronomical data determined that lint percentage (GOT) and seed cotton yield also increased up to 4.6% and 29.5% respectively, in transgenic cotton lines compared to the control lines. Our data demonstrate that the GhACTIN1 gene is a strong candidate gene for cotton fiber and yield improvement.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10603119 | PMC |
| http://dx.doi.org/10.1038/s41598-023-45782-0 | DOI Listing |
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