PCA can be a very useful tool for segregating natural accessions with the best fruit physico-chemical properties and antioxidant activity. However, correlations between fruit physical traits and content of primary and/or secondary metabolites were not significant in most cases or were of weak intensity, indicating that larger fruits were generally poorer in phytochemicals content.
The fruit physical characteristics correlated significantly and positively with each other. The 'AFTM 27′ had the lowest RI, whereas 'AFTM 24′ had the worst TPC and TFC. The most acidic fruits had 'AFTM 11′ and 'AFTM 27′. The highest RI was found in 'AFTM 8′ and 'AFTM 10′. The worst vitamin C content, TAc and TPC had 'AFTM 21′ and 'AFTM 24′, respectively, whereas the lowest TFC and TAC were registered in 'AFTM 11′. The 'AFTM 18′ had the best antioxidant capacity, whereas 'AFTM 19′ had the highest TFC. The lowest values of all fruit physical traits were registered in 'AFTM 6′. The 'AFTM 1′ characterized with the highest FW, FRa, both fruit dimensions, D g, SA, FV, TAc and TPC and with the lowest SSC. In general, the best fruit physico-chemical properties and antioxidant activity had 'AFTM 1′, 'AFTM 7′, 'AFTM 8′, 'AFTM 10′, 'AFTM 18′ and 'AFTM 19′ although there were similarities between certain accessions in the values of the evaluated traits. The results indicated significant differences in FW, SW, D g, L/D ratio, φ, FRa, SA and FV and contents of primary metabolites, phenolic compounds and antioxidant activity among accessions. The quick canopy closure of young regeneration results in an appropriate dune fixation and wind erosion control.įrom 2018-2020, we evaluated main fruit phisico-chemical properties and antioxidant capacity of 27 natural cornelian cherry (Cornus mas L.) accessions selected at western Serbia. This intervention is from below, heavy (intensity over 25% by number of trees or basal area) and of negative selection type, removing mostly low Kraft’s class, dead or dying, and defective trees.Ĭonclusions: This R&D project has shown the high potential of black locust to establish naturally by root suckers after a low coppice cut and stump removal, as well as the fast initial growth of regenerated black locust. ha-1 (2) The initial growth of black locust regeneration is quick and the young regeneration can close the canopy in 1-2 years, resulting in an appropriate dune fixation and wind erosion control (3) The young pure or mixed black locust-dominated stands are left untended until the first cleaning-respacing (mean diameter 5-6 cm), when the stand shows high stocking/density and a wide variation in tree size.Results: The main outputs of the project are as follows: (1) Black locust was established naturally by root suckers and the stocking of newly established stands can be as high as 50,000 suckers A thorough statistical analysis using the data on initial, extracted and residual trees/stands was also performed. Biometrical measurements and analyses as well as biomass estimations were performed. Materials and Methods: Three sub-compartments were selected in IV Valea lui Mihai Working Circle, Săcueni Forest District: two pure natural regenerations by root suckers of black locust at different ages (sub-compartments 3B and 52A%) and a mixed black locust - black cherry stand (sub-compartment 23D). In this respect, a Research and Development (R&D) project has been carried out in Carei-Valea lui Mihai Plain (north-west of Romania) since 2016. Background and Purpose: The aim of this study is to highlight the importance of black locust (Robinia pseudoacacia L.), a North American-originating tree species of major importance in Romania, in extreme site conditions such as sand dunes.
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