Impacts of iaa9-3 and iaa9-5 mutations on the seed quality of tomatoes

ABSTRACT

Heat stress has become a serious problem in tomato production. The parthenocarpic tomato mutants, iaa9–3 and iaa9–5, have been isolated from a mutant population of the Micro-Tom cultivar. According to our previous study, those two mutants are adaptable and capable of producing fruits under heat-stress conditions. On the other hand, from the perspective of commercialisation, seed quality is another important trait. In this study, we evaluated the effects of the iaa9–3 and iaa9–5 mutations on the seed quality by comparing them to its wild type (WT-MT). Several parameters related to seed quality such as seed number, seed viability, vigour index, emergence speed index, and maximum growth potential were analysed. The results showed that iaa9–3 mutation negatively affected seed quality, including reduced seed number, seed viability, vigour index, emergence speed index, and maximum growth potential. Interestingly, iaa9–5 mutation could reduce seed quality while the reduction was not significantly different compared to the WT-MT, suggesting that iaa9–5 was suitable for producing high-quality seeds compared to iaa9–3.

KEYWORDS:

• Parthenocarpic
• mutant
• auxin
• IAA9
• Solanum lycopersicum L.

Acknowledgements

We thank the National BioResource Project (NBRP), Japan, for providing the seeds of S. lycopersicum cv. Micro-Tom, iaa9-3 and iaa9-5. We also thank all of the members of our laboratory for helpful discussions throughout the work.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availibility statement

The data that support the findings of this study are available from the corresponding author, [AN], upon reasonable request.

Additional information

Funding

This work was supported by a World Class Professor Grant 2023 from the Ministry of Education, Culture, Research, and Technology, The Government of Indonesia. The Article Processing Charge was funded by Universitas Padjadjaran, Indonesia.