EFFECT OF COPPER IN HYDROPONIC SOLUTION ON LEAVES AND ROOTS OF SAFFRON (CROCUS SATIVUS L.)
The objective of the present study was to investigate the effect of hydroponic solutions with various concentrations of copper (Cu) on leaves and roots of saffron (Crocus sativus L.). The highest values of leaf length, leaf dry weight, length of longest root, and root dry weight were observed in corms grown in nutrient solution with 5 µM of Cu. The values of these parameters were reduced in corms which were grown in media without copper (water or nutrient solutions with 0 µM Cu) or in nutrient solutions with high concentrations of copper. Contractile roots were not observed in corms fed with either with water or nutrient solution without copper. The number of contractile roots were increased with rising concentrations of copper in nutrient solution and reached a maximum value in solution with 20 µM Cu. Thus, it may be concluded that 5 µM of Cu has a stimulating effect; while the 20 µM of Cu has an inhibitory effect on leaves and roots growth of saffron. It is suggested that the contractile roots may have developed a protection strategy (such as accumulation of copper) against Cu toxicity.
Sorooshzadeh, A. and Tabibzadeh, Z. (2015). EFFECT OF COPPER IN HYDROPONIC SOLUTION ON LEAVES AND ROOTS OF SAFFRON (CROCUS SATIVUS L.). Acta Hortic. 1062, 83-88
leaf length, leaf dry weight, root length, root dry weight, contractile root number