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Publication Type J
Authors Qasim, M., Y. Fujii, M. Z. Ahmed, I. Aziz, K. N. Watanabe and M. A. Khan
Title Phytotoxic analysis of coastal medicinal plants and quantification of phenolic compounds using HPLC
Source Plant Biosystems
Author Keywords Allelochemicals halophytes hypocotyl leaf litter leachates radicle sandwich method antioxidant activity seed-germination hypoxylon pruinatum allelopathy growth identification halophytes bark l. allelochemicals
Abstract Medicinal plants are rich sources of bioactive phytochemicals. Production of such chemicals usually increased under unfavorable conditions. This study investigated the phytotoxic potential of 105 medicinal plants distributed in arid/semiarid areas along Arabian Sea coast of Pakistan. Total polyphenols, flavonoids, tannins and composition of individual phenolic compounds were also determined in species which showed high phytotoxic potential. Sandwich method was used to determine the phytotoxicity of medicinal plants on the growth of lettuce seedlings. Radicle growth was inhibited more than the hypocotyl growth. In general, halophytes showed higher phytotoxic potential than non-halophytes. Capparis cartilaginea, Indigofera hochstetteri, Parkinsonia aculeata and Prosopis glandulosa showed highest degree of inhibition. Higher amount of total phenols (16.35-25.33 mg GAE g(-1)), flavonoids (3.32-6.41 mg QE g(-1)) and tannins (1.54-2.54 mg TAE g(-1)) were found in these species. Pyrocatechol, quercetin, gallic, hydroxybenzoic and ferulic acids were detected as major phytotoxins, of which, gallic acid, pyrocatechol and quercetin were most abundant. These phytochemicals could be used for the production of natural, safe, healthy and eco-friendly agro-chemicals. Furthermore, these plants can be grown without encroaching agricultural lands, and can convert vast areas of arid/saline lands into economically viable resources, which also helps to halt climate change and desertification.
Author Address [Qasim, Muhammad; Ahmed, Muhammad Zaheer; Aziz, Irfan; Khan, M. Ajmal] Univ Karachi, ISHU, Univ Rd, Karachi 75270, Pakistan. [Qasim, Muhammad; Fujii, Yoshiharu] Tokyo Univ Agr & Technol, Fuchu, Tokyo, Japan. [Qasim, Muhammad; Watanabe, Kazuo N.] Univ Tsukuba, Grad Sch Life & Environm Sci, Gene Res Ctr, Ibaraki, Japan. Qasim, M (reprint author), Univ Karachi, ISHU, Univ Rd, Karachi 75270, Pakistan. mqasim@uok.edu.pk
ISSN 1126-3504
ISBN 1126-3504
29-Character Source Abbreviation Plant Biosyst.
Year Published 2019
Volume 153
Issue 6
Beginning Page 767-774
Digital Object Identifier (DOI) 10.1080/11263504.2018.1549607
Unique Article Identifier WOS:000506619600003
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