Chemical composition and phytometric parameters of needles Pinus mugo Turra in Nizke Tatry mountain range (Central Slovakia)
1994
Blaho, J. (Technical Univ., Zvolen (Slovak Republic). Faculty of Ecology and Environmental Sciences)
The analysis of chemical composition, physical and chemical properties and phytometric parameters was done using bioindicative samples. Conclusions of our tests are as follows: (1) an average weight of needles is lower in higher altitudes of plots, (2) the dry weight of needles increases according to their age, (3) older needles contain higher portion of substances extractable by water and organic solvents, (4) the water extract contains, according to age of needles, a growing portion of reducing substances assumpted to glucose and as the pH of an extract is growing, (5) in older needles is higher the content of plant pigments, the portion of chlorophyll in relation to carotenoides was between 2.03-3.00 and the ratio chlorophyll A:B was between 1,8 in new and 3,0 in older needles. The needles damaged by frost show, in compparison with undamaged ones: (1) higher dry weight and pH value of water extract, (2) lower vital weight, conductability and BNK7, e.g., the bufferring capacity of the water extract. The needles that show partial necrosis and depigmentation in points and along their length contain a dense growth of mycelia. The enzymes produced by fungi and mildews reduce a chlorophyll content in needles as spot-like initially, but later totally
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