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Growth and photosynthesis of cherry saplings in response to moderate shade (Articolo in rivista)

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Growth and photosynthesis of cherry saplings in response to moderate shade (Articolo in rivista) (literal)

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38. Centritto M., Pietrini F., Sorrentino G. & Liu S. (2003)
Growth and photosynthesis of cherry saplings in response to moderate shade
(literal)

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Cherry (Prunus avium) saplings were grown for two growing seasons under natural sunlight (controls) or moderate shading (up to 30%, depending on the incident light intensity and the hour of the day). Reduced light intensity increased plant component dry mass. Consequently, total dry mass of shaded plants was significantly larger than that of controls at the end of both the growing seasons. The diurnal trend of photosynthesis per unit of leaf area of shaded plants was similar to controls during the hottest summer days in both growing seasons. However, in the second growing seasons, the daily integral of net leaf carbon assimilation was larger in shaded than in control saplings. Thus, it is suggested that the increased growth of shaded plants originates from larger whole-plant photosynthesis. Although transpiration rate in the control was significantly higher than in the shaded condition only in the first growing season, water use efficiency of shaded plants was improved in both growing seasons. Our results suggest that a moderate shading by decreasing the energy load and functioning as a barrier to turbulent diffusion transfer (i.e. thicker boundary layer), can be a useful practice for tempering the environment surrounding plants and, thus, improving growth in hot and dry environments (literal)

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