Abstract:
Leaf pigments serve as indicators for photosynthetic activity of plants. Also, pigments content can provide valuable
information concerning physiological status of plants and some biochemical processes. The present study had as
starting point the hypothesis that pigments are quantitatively influenced by phenophase and location. The studied
species are Abies alba and Nepeta pannonica, identified in local wild populations near bukovinian localities named
Cacica, Gura Humorului and Câmpulung Moldovenesc, which have specific climatic, orographic and edaphic
characteristics. For collecting of biological material, from Abies alba species, there was selected mature exemplars,
about same age. From them, there were harvested annual growings, from the first level of branches, during growing and
flowering phenophases, in 2017. Probes of Nepeta pannonica leaves have been picked up from the third foliar node, in
the same phenophase, during the same year. Researches were performed on plants, using CCM - 900 PLUS device, and
in laboratory, with Shimandzu UV - 1800 spectrophotometer. After data centralization, there has been observed that
Abies alba from all these three areas cotains a greater amount of chlorophyll and flavonoids during flowering
phenophase than during growing phenophase. Also, the pigments content is inversely proportional with altitude. Nepeta
pannonica presents different variations concerning amount of these pigments. This thing is caused by senescence of
leaves, unusual meteorological conditions and reduced light. Thus, it can be concluded that the connection between
amount of foliar pigments and phenophase, respectively location, is more obvious at Abies alba than Nepeta pannonica.
