SALT TOLERANCE IN LIGUSTRUM SINENSIS LOUR. FOR URBAN GREEN AREAS
Salinity stress due to low quality water, salt-affected soils or the use of antifreeze solutions is one of the most serious problems for ornamental plant in urban green areas. Damages can be caused by the contact of salts with foliar or root tissues that induces diffused or local necroses and alteration of chlorophyll content. This work aimed to investigate the response to saline stress of Ligustrum sinensis. One-hundred-twenty plants were grown at the Experimental Centre of the Faculty of Agriculture of the University of Turin (Italy) and then treated six times with two NaCl solutions (125 mM and 250 mM), applied by immersion or perfusion, miming sea aerosol and antifreeze solutions, and distilled water as control. Effects on colour variation, determined by means of spectrophotometer and visual check, SPAD values, and leaf chlorophyll content were evaluated each two weeks. Generally, for both spectrophotometer and visual check, limited statistical differences were observed. No foliar damage (yellowing) values superior to 5% were found, showing tolerance to NaCl solutions. Chlorophyll content was slightly lower only in plants treated by perfusion with salt. Overall, NaCl did not exert evident toxic effects on plant growth and ornamental characteristics of L. sinensis plants. For this reason this species appeared to be valuable for urban green area design in salt-affected environments.
Caser, M., Scariot, V. and Devecchi, M. (2013). SALT TOLERANCE IN LIGUSTRUM SINENSIS LOUR. FOR URBAN GREEN AREAS. Acta Hortic. 999, 239-242
urban environments, sodium chloride, spectrophotometer, chlorophyll content, SPAD