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The effects of Anitranspirant di-1-p-menthene on Some Physiological Traits of Strawberry

Mikiciuk G., Mikiciuk M., Ptak P.

Journal of Ecological Engineering

2015

Vol. 16, nr 4

161--167

Strawberry is a species sensitive to water shortages, especially during fruit growth and ripening. One method of limiting water loss in plant production involves the use of antitranspirants, which reduce plant transpiration. One method of limiting water loss in plant production involves the use of antitranspirants, which reduce plant transpiration. One of substances used for this purpose is, amongst others, natural terpene polymer di-1-p-menthene (pinolene). Research on the influence of a pinolene-containing antitranspirant (with the commercial name of Vapor Gard) on gas exchange parameters (intensity of net CO2 assimilation, intensity of transpiration, stomatal conductance for water, substomatal CO2 concentration), the water balance and the content of assimilation pigments (chlorophyll “a”, “b”, total chlorophyll, carotenoids) in the leaves of the cv. ‘Salsa’ strawberry was conducted in the years 2009–2010. The antitranspirant was used once at a concentration of 0.75% before flowering. The measurements were performed four times: before flowering (1st measurement date), when the plants were in full flowering (2nd measurement date), in the middle of the harvest season (3rd measurement date) and after the end of the harvest season (4th measurement date). Foliar application of the Vapor Gard antitranspirant decreases the intensity of strawberry transpiration without changing the CO2 assimilation activity. Plants sprayed with the tested preparation were characterised by a higher relative water content (RWC) in leaves and a higher value of the photosynthetic index of water use efficiency (WUE). The antitranspirant did not influence the content of assimilation pigments in straw-berry leaves. The values of the determined physiological features depended on the measurement date (developmental stage) of the tested strawberry cultivar.

The effect of antitranspirant on the content of microelements and trace elements in sweet cherry leaves and fruits

Mikiciuk G., Możdżer E., Mikiciuk M., Chełpiński P

Journal of Ecological Engineering

2013

Vol. 14, nr 4

36--38

The conducted study was aimed at evaluation of the effect of antitranspirant produced with natural resins under the trade name Vapor Gard on the content of microelements and trace elements in sweet cherry leaves and fruits. A single-factor experiment was conducted in the randomised block design, with five replications, in 2010–2011. Examinations were performed on 13-year-old sweet cherry trees of the cultivar ‘Burlat’, being grafted on the ‘PHL-A’ rootstock. Tree spraying with antitranspirant Vapor Gard, at a 0.75% concentration, was applied at the stage of fruit colouration. The total content of manganese, zinc, copper, nickel, lead and cadmium in the leaves and fruits was determined by the AAS method. Antitranspirant Vapor Gard had an effect on increasing significantly the manganese, copper, zinc, nickel and cadmium quantities and decreasing the content of lead in the sweet cherry leaves. The antitranspirant being applied did not have any effect on the quantity of microelements and trace elements in the sweet cherry fruits of the cultivar ‘Burlat’.