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Wyświetlanie 1-2 z 2
Tytuł:
The effects of Anitranspirant di-1-p-menthene on Some Physiological Traits of Strawberry
Autorzy:
Mikiciuk, G.
Mikiciuk, M.
Ptak, P.
Powiązania:
https://bibliotekanauki.pl/articles/952412.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
strawberry
pinolene
Vapor Gard
gas exchange
assimilation pigments
Opis:
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.
Źródło:
Journal of Ecological Engineering; 2015, 16, 4; 161-167
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Salinity and Nitrogen Deficiency on the Changes in Selected Physiological Parameters of Common Bean (Phaseoleus Vulgaris L.) Grown In Hydroponic Cultures
Autorzy:
Wróbel, J.
Auriga, A.
Mielczarek, M.
Powiązania:
https://bibliotekanauki.pl/articles/124417.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
salinity
bean
hydroponics
nitrogen deficiency
assimilation pigments
gas exchange
Opis:
This study aimed at evaluating the physiological activity of common bean grown under the conditions of stress being induced by salinity and nitrogen deficiency and its lack in substrate. Three series of two-factorial hydroponic experiment with the common bean (Phaseolus vulgaris L.) cultivar Basta were carried out from May to July in 2013–2014. The first experimental factor was three levels of nitrogen content in a Hoagland hydroponic medium (level 1 – a complete medium, level 2 – without 50% N, level 3 – without 100% N). The second experimental factor was three levels of medium salinity (level 1 – no NaCl addition, level 2 – 30 mM NaCl addition, level 3 – 50 mM NaCl addition). Nitrogen deficiency in a Hoagland hydroponic medium, together with increased salinity level, significantly affected the changes in the physiological parameters of the common bean cultivar Basta being tested, i.e. assimilation pigment concentration (chlorophyll-a, chlorophyll-b and chlorophyll-a+b and carotenoids), assimilation and transpiration intensities, and RWC (relative water content). The 50% nitrogen deficiency in medium induced a significant increase in the concentration of all assimilation pigments in common bean leaves and was by far the highest among the experimental variants being tested. A significant decrease in the content of assimilation pigments was observed in the hydroponic mediums without nitrogen and salined with 30 and 50 mM sodium chloride. The interaction of these two experimental factors being analysed, i.e. nitrogen deficiency and its lack in a Hoagland hydroponic medium and its salinity, significantly decreased the intensity of assimilation in bean leaves, while a significant increase in transpiration was observed in the variant without nitrogen and with 50 mM NaCl. The experimental variants being tested had a significant effect on the changes in leaf water balance of the common bean cultivar being tested. Salinity, in interaction with nitrogen deficiency in medium, decreased relative water content (RWC) in leaves, irrespective of their level.
Źródło:
Journal of Ecological Engineering; 2016, 17, 4; 321-327
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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