Responses of Solanum tuberosum L. to Water Deficit by Matric or Osmotic Induction

Dorneles, Athos Odin Severo; Pereira, Aline Soares; Silva, Talis Basilio da; Taniguchi, Marisa; Bortolin, Gabriel Streck; Castro, C. M.; Pereira, A. da S.; Júnior, Carlos Reisser; Amarante, Luciano do; Haerter, J. A.; Dutra, Leonardo Ferreira

doi:10.1007/s11540-020-09489-3

Cited by 3 publications

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“…Even though PEG can result in serious stress to plants, it is used frequently as an osmotically active agent [51]. In our experiments the significantly strongest inhibition on studied characters was observed on shoot cultures grown on media with PEG 600.…”

Section: Discussionsupporting

confidence: 46%

“…Osmotic stress tolerance expressed at the tissue level may play a greater role in referent genotype C103, while other factors should be considered in the case of the C107 genotype. As drought tolerance is rather complex in nature, other factors, for example, regulation of stoma closure [16,50] and/or phenological properties (especially at time of maturity) could be relevant [14,51,52]. However, considering our results, morphological factors including root developmental characters formed under stress conditions can be of great importance [53].…”

Section: Discussionmentioning

confidence: 68%

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Responses of Potato (Solanum tuberosum L.) Breeding Lines to Osmotic Stress Induced in In Vitro Shoot Culture

et al. 2022

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In vitro experiments were conducted to study the responses of potato (Solanum tuberosum L.) genotypes to osmotic stress. In vitro shoot cultures of 27 breeding lines and their drought-tolerant parents (referent lines: C103 and C107) were tested under osmotic stress induced by addition of PEG 6000 (Mw = 6000; 5.0, 7.5, 10.0%, w/v), D-mannitol (0.1, 0.2, 0.3 M) and PEG 600 (Mw = 600; 2.5, 5.0, 7.5%, w/v) to the Murashige-Skoog medium. Stress index (SI) was calculated from shoot length (SL) and root length (RL), root numbers (RN) and the rate of surviving shoots (SR) (SISL;RL;RN;SR = ParameterSL;RL;RN;SR of treated shoots/ParameterSL;RL;RN;SR of control shoots × 100) to compare genotypes. In the average of each breeding line and concentration, the osmotic agents resulted in SI values of 40.1, 60.8, 82.6 and 76.0 for SISL, SIRL, SIRN and SISR, respectively. In general, all SI values of C103 and SIRL,RN of C107 were significantly higher than those of the breeding lines. Nine breeding lines were found to be promising based on their final ranking. According to the results, 7.5% and 10% PEG 6000 or 0.2 M and 0.3 M D-mannitol treatments proved to be suitable for the selection of osmotic stress-tolerant genotypes.

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Section: Discussionsupporting

confidence: 46%