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Publication Type J
Authors Rilke, S. and C. Reimann
Title Morphological and ecophysiological differences between the subspecies of Salsola kali L in Europe: Results of culture experiments
Source Flora
Abstract The subspecies of Salsola kali in Europe were cultivated in a greenhouse with salinity treatments from 0 to 800 mol m(-3) NaCl. Whereas the plants of subsp. kali and subsp. tragus survived more than 400 mol m(-3) NaCl and grew most vigorously at about 100 mol m(-3), the individuals of subsp. iberica did not tolerate more than 200 mol m(-3) NaCl. In comparison to the littoral subspecies kali and tragus, sodium accumulation was significantly lower in subsp. iberica. Moreover, the thin leaves of this subspecies did not increase their diameter beyond 1.1 mm after salt treatment, whereas salt-induced succulence was obvious in subsp. kali and subsp. tragus. In all subspecies, substrate salinity decreased height and branching, but did not change characters like colour, indument, and fruit morphology. Comparison of the different subspecies at different stages of development revealed a lower degree of prickliness in subsp. iberica and a procumbent growth form in subsp. kali. High intra-populational variation was observed with respect to colour, indument, and development of wings. Overall, the results show that genetic differences, phenotypic responses to salinity and developmental changes create a high intrapopulational variation. Thus the subspecies are difficult to separate by morphological features. The differentiating characters used so far are critically discussed in view of these results.
Publication Date Oct
Year Published 1996
Volume 191
Issue 4
Beginning Page 363-376
Unique Article Identifier ISI:A1996VT87400007
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