Gordon Gray. Funding agency. SAGES Project. Greenhouse Team. Eldon Siemens. Jackie Bantle. SEM. Guosheng Liu. Rob Peace. Confocal / microscopy.
Effect of drought acclimation on drought stress resistance in potato (Solanum tuberosum L.) genotypes Pankaj Banik and Karen Tanino
www.usask.ca
Potato plants are sensitive to drought stress
Sensitive to drought (van Loon 1981) Even a short period of water stress • Tuber quality and production Critical stages (Onder et al. 2005) • Stolon elongation • Tuber initiation • Delays tuber formation • Decrease in tuber number, growth & yield
4 flower stage ( in cymose inflorescence) www.usask.ca
Drought Acclimated & Drought Stressed (DAS) 35
Non-Acclimated & Drought Stressed (NAS) 1st DA
2nd DA
1st DS
1st DS-R
30
Soil mc, %
25
5 days
7-10 days
5-7 days
20
15
10
5
0
Non-Acclimated & Non-Stressed (NA)
2nd DS
2nd DS-R
Hypotheses
Pre-exposure to water deficit will induce drought acclimation in potato genotypes
There are genotypic differences in drought stress resistance
Leaf and stem characteristics will distinguish genotypes and ability to acclimate to drought stress www.usask.ca
Potato genotypes used AAFC Potato breeding program, Lethbridge AB • Fv12246-6 (Fv)
