engleski

Effect of salinity on behavior of some cations in strawberry (Fragaria x ananassa) plant organs

We studied the influence of the three salinity levels on the uptake, distribution and ratio of sodium, potassium, calcium and magnesium in strawberry (Fragaria × ananassa) plant organs. Salinity levels of the growth medium were modified by addition of NaCl to the irrigation water. Treatments were: non-saline conditions (control) = 0.73 mS cm-1 (0 g NaCl), medium salinity (MS) = 4.37 mS cm-1 (2 g NaCl) and high salinity (HS) = 7.81 mS cm-1 (4 g L-1 NaCl). The average sodium content (based on dry matter) was increased in all strawberry plant organs (3.5 times in fruits to 19.4 times in young leaves relative to the control) ; potassium content was reduced 2.5% in young leaves to 31.3% in roots, and increased in fruits by 10.2% ; calcium was reduced in roots and fruits (20 and 24.7%), and was increased in floral shoots (35.4%) ; magnesium was not affected in old and young leaves, but was reduced in the roots and fruits (6 and 5.6%), and increased in floral shoots (6.7%). Increased salinity had the most significant impact on the uptake of potassium, followed by calcium and magnesium. Moreover, it resulted in the reduction of the K/Na, Ca/Na, Mg/Na and K/Mg ratio in all plant parts, and the reduction of the K/Ca ratio in all plant parts except young leaves and fruits. The Mg/Ca ratio decreased in old leaves and floral shoots while it increased in roots and strawberries fruits.

NaCl ; sodium, potassium, calcium, magnesium

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