Zangoueinejad, R.; Alebrahim, M.T.; Castro, E.; Stallworth, S.; Yue, Z.; Snyder, R.G.; Tseng, T.M. Dose-Response Study to Evaluate Dicamba Tolerance in Selected Wild Tomato Germplasm. Preprints2021, 2021120011. https://doi.org/10.20944/preprints202112.0011.v1
Zangoueinejad, R., Alebrahim, M.T., Castro, E., Stallworth, S., Yue, Z., Snyder, R.G., & Tseng, T.M. (2021). Dose-Response Study to Evaluate Dicamba Tolerance in Selected Wild Tomato Germplasm. Preprints. https://doi.org/10.20944/preprints202112.0011.v1
Zangoueinejad, R., Richard G Snyder and Te Ming Tseng. 2021 "Dose-Response Study to Evaluate Dicamba Tolerance in Selected Wild Tomato Germplasm" Preprints. https://doi.org/10.20944/preprints202112.0011.v1
A greenhouse dose-response study was conducted to determine the tolerance of three wild tomato accessions (TOM199, TOM198, TOM300) in comparison to a commercial cultivar (Better Boy) against the dicamba application at five rates (0, 70, 140, 210, and 280 g ae ha-1) at 14 and 28 days after treatment (DAT). Several physiological traits were evaluated at 0, 1, 3, 5, and 7 DAT. Wild accessions and cultivar were killed at all rates above 70 g ae ha-1 at 14 and 28 DAT, which is why differences between accessions and cultivar were only evident at 70 g ae ha-1. The GR50 (the herbicide rate that causes 50% reduction in dry weight) of Better Boy was 4.4 g ae ha-1 at 28 DAT, and this cultivar was approximately 11-fold more sensitive than wild accessions. At 7 DAT, the levels of H2O2 for wild accessions were lower than Better Boy up to 5 at 70 g ae ha-1 of dicamba. Furthermore, wild accessions showed lower herbicide absorption than Better Boy at all dicamba doses at 1, 3, and 7 DAT. All the three wild accessions expressed tolerance to the dicamba application at the dose of 70 g ae ha-1. At the same time, Better Boy and wild accessions were susceptible to dicamba application at rates of 140, 210, and 280 g ae ha-1.
Biology and Life Sciences, Agricultural Science and Agronomy
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