Sarehi Ebrahimi, Seyed Mehdi Razavi, Mansour Afshar Mohammmadian,
Volume 10, Issue 1 (6-2023)
Abstract
The increase of the entry of industrial effluents containing various types of heavy metals into water and soil leads to the ever-increasing spread of environmental problems. Therefore, it is necessary to find less expensive solutions to reduce the pollution. In this regard, in order to compare the effect of the removal of heavy elements on some of the morphological and physiological characteristics of C. alternifolius, Ch. zizanioides and Aloe vera plants, an experiment was conducted in the form of a randomized complete block design with three replications for 14 months at the University of Guilan. The results showed that under the treatment of industrial wastewater, the metal accumulation indices (MAI) of zinc, chromium, lead, copper, manganese, nickel, magnesium were higher in Ch. zizanioides and Aloe vera than those in C. alternifolius. In all three studied plants, the indices of root length, shoot length, total biomass and tolerance index (TI) had a significant decrease compared with those in the control plants, and Ch. zizanioides and A. vera plants had the lowest percentage of decrease. In addition, other investigated components including absorption index (UI), total soluble sugar, total phenol content, total flavonoid, total anthocyanin, total tannin, and DPPH free radical inhibition percentage increased in all three plants under industrial wastewater treatment. The highest percentage of increase in all investigated components, except DPPH free radical inhibition percentage, was observed in Ch. zizanioides. In general, it can be said that in terms of MAI and morphological and physiological characteristics, Ch. zizanioides and A. vera were more successful than the C. alternifolius. Therefore, it is recommended to plant the studied plants in the order of priority (Ch. zizanioides ˃ A. vera ˃ C. alternifolius) in soils contaminated with industrial effluents, in order to remediate the soil.
Dr Seyed Mehdi Razavi, Mrs Neda Delir, Dr Sareh Abrahimi, Dr Mansour Afshar Mohammadian,
Volume 11, Issue 2 (8-2024)
Abstract
Using the allelopathic property of some plant species is one of the proposed methods to reduce the use of chemical poisons. Anthriscus nemorosa is an aromatic plant belonging to the Apiaceae that grows naturally in the western and northern parts of in this study. Considering that so far the biochemical and allelopathic properties of this plant have not been investigated in Iran, in this study, the roots of this plant were collected from Khalkhal county and after drying in the shade, the essential oil was extracted by hydro-distillation. The essential oil was analyzed by GC and GC-MS. 52 compounds were identified from the essential oil, representing 80.21% of the total oil. The main constituents were Myristicin (16.92%), Heptane (12.98%), Elemicin (12.54%), Gamma-Terpinene (12.50%), Decane (3.08%), Beta-Eudesmol (2.95%) and Beta-phellandrene (2.52%) and these compounds were remarkably different with that of A. nemorosa native to Serbia. To investigate the allelopathic effects of this plant, an experimental design was factorial experiment in a completely randomized design with four replications. The results of examining the effects of n-hexane, dichloromethane and methanolic extracts (with concentrations of 0, 0.001, 0.01, 0.1 and 1 mg/ml) of the root of this plant on lettuce (Lactuca sativa L. var.capitata) showed that all three extracts had an inhibitory effect on the germination percentage (%), shootlet growth and rootlet growth of lettuce. However, the hexane extract in all treated concentrations had a more inhibitory effect on the germination and shootlet growth of lettuce seed.
