Morpho-Physio-Biochemical Attributes of Roadside Trees as Potential Tools for Biomonitoring of Air Quality and Environmental Health in Urban Areas

Environmental pollution is an important issue in metropolitan areas, and roadside trees are directly affected by various sources of pollution to which they exhibit numerous responses. The aim of the present study was to identify morpho-physio-biochemical attributes of maidenhair tree (Ginkgo biloba L.) and American sycamore (Platanus occidentalis L.) growing under two different air quality conditions (roadside with high air pollution, RH and roadside with low air pollution, RL) and to assess the possibility of using their physiological and biochemical parameters as biomonitoring tools in urban areas. The results showed that the photosynthetic rate, photosynthetic nitrogen-use efficiencies, and photochromic contents were generally low in RH in both G. biloba and P. occidentalis. However, water-use efficiency and leaf temperature showed high values in RH trees. Among biochemical parameters, in G. biloba, the lipid peroxide content was higher in RH than in RL trees, but in P. occidentalis, this content was lower in RH than in RL trees. In both species, physiological activities were low in trees planted in areas with high levels of air pollution, whereas their biochemical and morphological variables showed different responses to air pollution. Thus, we concluded that it is possible to determine species-specific physiological variables affected by regional differences of air pollution in urban areas, and these findings may be helpful for monitoring air quality and environmental health using trees.

A Selective Ion HPLC-APCI-MS Method for the Quantification of Pentacyclic Triterpenes in an Anxiolytic Botanical Dietary Supplement for the Animal Health Market

A new anti-anxiety dietary supplement was developed for the animal health market, by combining 2 triterpene containing botanicals, Souroubea sympetala (Marcgraviaceae) with Platanus occidentalis (Platanaceae) A validated method for a quality control of the botanical blend was achieved using HPLC-APCI-MS. The method resulted in the detection and quantitative determination of betulinic acid (1), and ursolic acid (2) in P. occidentalis and 1, 2, lupeol (3), β-amyrin (4) and α-amyrin (5) in S. sympetala and the finished product ZentrolTM. Detections were at low ng on column for 1 and 2 and in low μg range for 3, 4 and 5 using calibration curves within 10-100 ng (R2 > 0.993). Recovery of spiked samples for all the recoveries observed were > 94%. Inter-day and intra-day variations were 0.8-3.5% and 5-10.4%, respectively. These results indicate the suitability of the developed analytical method to detect and quantify triterpenes of raw materials used in the manufacture of natural health products.

Public Perception and Perceived Landscape Function of Urban Park Trees in Tabriz, Iran

Landscapes of parks may contribute an important function in the urban park with a wide range of benefits. However, there is a lack of understanding of the publics‘ preferences for parks‘ landscape funtions and benefits in middle-east countries such as Iran. About 275 park users were interviewed using photo-questionnaire in Tabriz, Iran using five point Likert scale (1 = strongly disagree,.. 5 = strongly agree) for measuring their preference level. Descriptive analysis, factor analysis, and variance analysis (Independent sample t-test and ANOVA) were used for analyzing the data. The results revealed the majority of the participants were male (54.5%), single (65.09%), highly educated (71.4%), below 40 years old (62.9%), and visit the park with family members (43.3%) in the evenings (54.5%). The participants preferred the presence of Salix alba followed by Pinus nigra, Platanus occidentalis, and Morus alba in the urban park, respectively. “Flowering purpose“ (mean= 4.21) and “green enlargement“ (mean= 4.20) were important functional dimensions, whilst, “health care“ (mean= 4.33) and “mental recovery“ (mean= 4.29) landscape benefits in urban parks. It is concluded that, perhaps, attributions of trees such as creating shade, with the canopy on top, and having large leaves are significant factors on publics‘ landscape preferences.