Salt Tolerance of Two Potato Cultivars
Abstract
Potato (Solanum tuberosum L.) is one of the leading crop plants used for food production globally. The varieties that are presently grown are greatly hampered productively by increased salinity. The repercussion of salinity stress on productivity of potato plant was assessed using Shangi and Unica varieties sourced from KALRO Tigoni. Potato tubers were grown in 4L polybags packed with coco peat media and kept under greenhouse conditions. A two-factorial experiment in CRD was used with factors being cultivar and treatments of salt concentrations. Twenty-one days after emergence, plants were subjected twice in seven days to six different treatments of salinity levels (0, 6, 8, 10, 12,14dS/m) of NaCl in solution form prepared. Measurements of height 30 days after start of salt application, tuber weight and number at harvest were recorded. At 0dS/m, the two varieties performed optimally. Salt concentration significantly affected cultivars performance in height, weight of tubers and number of tubers. Both shangi and Unica demonstrated better performance at between 6-8 dS/m with less yield decrease than the other salt concentration. At 10dS/m, Unica’s performance was better as opposed to Shangi that was adversely affected by the salts though Shangi’s performance decreased at a higher rate with increase in salt. (Table 3). The tubers had the highest weight at 6 dS/m concentration while Unica species produced tubers with the highest weight. (16g). Unica therefore performed better than Shangi indicating that it’s more tolerant to salinity than Unica. This research was meant to identify a salt tolerant potato cultivar between Shangi and Unica which can be used for breeding for salt tolerant varieties. It was thus found that Unica is salt tolerant as had been found in other previous studies. Unica therefore is recommended for planting by farmers who cultivate in fields affected by high salinity incidences. In addition, Unica genes are recommended to breeders who can use them for breeding purposes to breed for salt tolerant cultivars.
References
Ali, S., Kadian, M.S., Singh B.P., (2013): Degeneration of potato seed in Meghalaya and Nagaland states in North-Eastern hills of India.
Amata, R., Getu, E., Kashaija, I.N., Kullaya, A.,Kyamanywa, S., Senkesha, N (2011). Enhancing Food Security through Improved Seed Systems of Appropriate Varieties of
Cassava, Potato and Sweet potato Resilient to Climate Change in Eastern Africa.
Bradshaw, J.E. & Ramsay, G., (2009): potato Origin and production.
Chaves, L. C. G.; Andrade, E. M.; Crisostomo, L. A.; Ness, R. L. L.; Lopes, J. F. B. Risk of degradation in irrigated soil at the distrito de irrigação do perímetro Araras Norte, Ceará, Brazil. Revista de Ciências Agronômicas, Natal-CE, v. 37, n. 3, p. 293-299, 2006.
Durr, G. &. 1980 Potato production and utilization in Kenya.
Feijão, A.R.; Silva, J.C.B.; Marques, E.C.; Prisco, J.T.; Gomes-Filho, E. (2011). Effect of nitrate nutrition on tolerance of southern sorghum plants to salinity. Agronomic Science Journal, Natal-CE, v. 42, n. 3, p. 675-683.
Fricke, W.; Akhiyarova, G.; Wei, W.X.; Alexandersson, E.; Miller, A.; Kjellbon, P.O.; Richardson, A.; Wojciechowski, T.; Scheiber, L.; Veselov, D.; Kudoyarova, G.; Volkov, V. (2006).The short-term growth response to salt of the developing barley leaf. Journal of Experimental Botany, Oxford-UK, v. 57, n. 6, p. 1079-1095.
Ghosh, S. C.; Asanuma, K.; Kusutani, A.; Toyota, M. (2001).Effect of salt stress on some chemical components and yield of potato. Soil Science and Plant Nutrition, Tokio-JP, v. 47, n. 3, p. 467-475.
Govindaraj, M., Srinivasan, M., & Vetriventhan, M. (2015) Importance of genetic diversity assessment in crop plants and its recent advances: An overview of its analytical perspectives. Genet. Res. Int.: 1–14.
Hawkes, J.G. (1994) Origins of cultivated potatoes and species relationships. In: Bradshaw, J. E. and G.R. Mackay (eds.) Potato genetics, CAB International, Wallingford, U K, pp. 3–42.
Jefferies, R.A. & Mackerron, D.K.L. (1988). The distributions of tuber sizes in drought and irrigated crops of potato. I. Observations of the effect of water stress on graded yields from differing cultivars. Potato Res. 31: 269–278.
Munns, R. Comparative physiology of salt and water stress. Plant, Cell and Environment, Malden-USA, v. 25, n. 2, p. 239-250, 2002.
Munns, R.; Tester, M. Mechanisms of salinity tolerance. Annual Review of Plant Biology, Palo Alto-USA, v. 59, n. 7, p. 651-681, 2008.
Muthoni, J., & Nyamongo, D.O., (2009); A review of constraints to ware Irish potatoes production in Kenya.
Muthoni, J., Shimelis, H., Melis, R., (2013). Potato Production in Kenya: Farming Systems and Production Constraints.
PARIDA, A.K.; DAS, A.B. Salt tolerance and salinity effects on plants: a review. Ecotoxicology and Environmental Safety, New York-USA, v. 60, n. 6, p. 324-349, 2005.
Pavlista, A.D. (2015) Scheduling reduced irrigation on ‘Atlantic’ potato for minimal effect. Am. J. Potato Res. 92: 673–683.
Schulte-Geldermann, E. (2013). Tackling low potato yields in Eastern Africa: an overview of constraints and potential strategies.
Sukhotu, T. and Hosaka, K., (2006). Origin and evolution of Andigena potatoes revealed by chloroplast and nuclear DNA markers.
United Nation Development Program, (2013). Annual report. Building resilient communities.
ZHU, J. K. (2001). Plant salt tolerance. Trends in Plant Science, Oxford-UK, v. 6, n. 2, p. 66-71.
