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All Journal AGRIVITA, Journal of Agricultural Science Makara Journal of Science
Azizan, Kamalrul Azlan
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Agriculture, Biological Sciences & Forestry

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Univariate and Multivariate Approaches for Identifying Key Differential Volatile Compounds in Wedelia trilobata Essential Oils from Four Different Locations Tuan Anuar, Tuan Ashraf Faiz; Ramli, Suria; Laosinwattana, Chamroon; Azizan, Kamalrul Azlan
Makara Journal of Science Vol. 28, No. 1
Publisher : UI Scholars Hub

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Abstract

Geographical location is an important factor affecting the production of the volatile compounds and corresponding bioactivity of essential oil (EO). The aim of this study was to determine whether the bioactivity of Wedelia trilobata EO varies by geographical location and identify the key volatile compounds involved in bioactivity. A total of 95 volatile compounds reported in W. trilobata EOs obtained from Brazil, India, Malaysia and Thailand were retrieved from the literature, and changes and key differential volatile compounds were identified with univariate and multivariate methods. Results showed that the monoterpene hydrocarbon content of α-phellandrene and α-pinene were higher than that of W. trilobata EOs from Brazil, India, and Thailand. The W. trilobata EO from Malaysia contained large amounts of limonene and diterpenes. Regarding sesquiterpene hydrocarbons, W. trilobata EOs from Malaysia and Thailand had high germacrene D content. The W. trilobata EO from Brazil had a large amount of trans-β-guaiene, whereas the W. trilobata EO from India had low amounts of sesquiterpene compounds. Partial least squares–discriminant analysis identified β-caryophyllene, α-humulene, and β-mycrene as key differential volatile compounds for differentiating W. trilobata EOs according to their origins. Overall, the findings revealed significant difference in volatile compound composition, showing that the volatile compounds of W. trilobata EO are affected by geographical location.
Unveiling Global Trends in Bioherbicide Research for Allelopathic Weed Control: A Bibliometric Analysis from 2002-2022 Mohd Aridi, Nor Atirah; Yusoff, Nornasuha; Sahrir, Muhd Arif Shaffiq; Azizan, Kamalrul Azlan
AGRIVITA Journal of Agricultural Science Vol 47, No 1 (2025)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v47i1.4390

Abstract

The harmful effects of chemical herbicides on the environment and human health have increased interest in natural bioherbicides. This study analyzed global trends in bioherbicide research for controlling weeds from 2002 to 2022 using bibliometric analysis. The bibliometric analysis presented the research trend based on relevant research topics, an annual publication for 20 years, the co-occurrence of countries and institutions, productive journals, and frequent keywords used. The Scopus database resulted in 1472 articles analyzed using bibliometric tools, R-4.2.2 software with Bibliometrix-Biblioshiny, and VOSviewer 1.6.19. The number of publications on bioherbicides increased since 2002, with a sharp increase in the last two years. China was the most productive country, followed by the United States, Brazil, and Pakistan. The University of Agriculture in Pakistan and Fujian Agriculture and Forestry University in China were the most productive academic institutions. The most frequent keywords were "allelopathy," "bioherbicide," and "weed control." The co-occurrence analysis indicated that the United States collaborated the most with other countries. The findings suggest that bioherbicides with allelopathy as weed control have the potential to be an effective alternative to chemical herbicides. Besides, it provides insight for better-collaborated publication and potential networking in the future.
Co-Authors Laosinwattana, Chamroon Mohd Aridi, Nor Atirah Ramli, Suria Sahrir, Muhd Arif Shaffiq Tuan Anuar, Tuan Ashraf Faiz Yusoff, Nornasuha