Physiological Responses and Ion Accumulation of Twelve Sweet Potato Clones Subjected to Salinity
Shimul Mondal1, Ebna Habib Md Sofiur Rahaman2, Folkard Asch1
1University of Hohenheim, Inst. of Agric. Sci. in the Tropics (Hans-Ruthenberg-Institute), Management of Crop Water Stress in the Tropics and Subtropics, Germany
Salinity is an increasingly severe threat to coastal agriculture, particularly in the mega deltas of the Asian large rivers. In these systems, agriculture during the dry season often includes tuber crops such as sweet potato that face the threat of salt intrusion either from inherent soil salinity or through irrigation. Sweet potato varieties with a relatively high degree of salt tolerance are urgently needed for the future resilience of such systems. Little research has been done on identifying traits for salinity tolerance in sweet potato. In this study, we subjected 12 contrasting sweet potato clones from the Bangladesh Agricultural Research Institute to varying levels of root zone salinity (0, 50, 100 and 150 mM NaCl) for 21 days in a hydroponic setup. Vines were separated into young, medium, and mature sections and the respective leaves, petioles, and stems were sampled individually. Vine length, leaf number, leaf area, SPAD values, and dry weight were determined and all samples analysed for sodium, potassium, and chloride concentrations.
Keywords: Cl- and K+ concentrations, dry mater, Na+, salt tolerant, tissue age
Contact Address: Shimul Mondal, University of Hohenheim, Inst. of Agric. Sci. in the Tropics (Hans-Ruthenberg-Institute), Management of Crop Water Stress in the Tropics and Subtropics, Garbenstr. 13, 70599 Stuttgart, Germany, e-mail: shimul.mondaluni-hohenheim.de