Abstract
Prangos ferulacea is a member of Apiaceae family, is a popular fodder for livestock production and an important species in rangeland restoration. The objectives of the research are the comparative phytotoxic activity of aqueous and hydroalcoholic extracts obtained from different organs (flower, shoot and leaf) of P. ferulacea on antioxidant response of Trifolium resupinatum was investigated in a laboratory bioassay. Antioxidant enzyme activities including catalase (CAT), peroxidase (POD), ascorbic peroxidase (APX), and superoxide dismutase (SOD), in line with content of malondialdehyde (MDA) and hydrogen peroxide were measured. Results indicated that hydroalcoholic extract of P. ferulaceae flower possess the highest total phenolic content as well as highest phytotoxic effect on T. resupinatum. The highest antioxidant enzyme activity belonged to hydroalcoholic treatment. The treated T. resupinatum seedlings experienced lipid peroxidation at high extract concentrations (12% of hydroalcoholic and 100% of aqueous extract) as evidenced by increased concentration of MDA. In response to this, the activities of SOD, CAT, POD and APX increased at lower extract concentrations but significantly dropped as concentrations increased. According to results of this study, rehabilitation of T. resupinatum sites through the use of P. ferulaceae will probably not be successful.
Highlights
Antioxidant enzyme activities in receiving plants can be affected by allelopathic compounds (Kaur et al, 2012)
The objectives of the research are the comparative phytotoxic activity of aqueous and hydroalcoholic extracts obtained from different organs of P. ferulacea on antioxidant response of Trifolium resupinatum was investigated in a laboratory bioassay
Hydroalcoholic extracts caused a higher activity of ascorbic peroxidase (APX), CAT and POD than aqueous extraction
Summary
Antioxidant enzyme activities in receiving plants can be affected by allelopathic compounds (Kaur et al, 2012). Dairy farmers in many parts of Iran, such as Fars province rangelands, attempted to restore rangelands through seeding and planting forage plants such as P. ferulaceae in order to attain more sustainable ecosystems with a higher forage production (Azarfard, 2008; Eilami, 2008). Such interventions into rangeland ecosystems can affect various components of ecosystems such as plant, animal and microbial communities (Palmer et al, 1997). It has been observed that usually no plant could be grown around P. ferulacea, probably due to the chemical effects of its compounds on other plants
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