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medicinal and biological values of Callistemon viminalis extracts:History,current situation and prospects

Asian Pacific Journal of Tropical medicine 2017年第3期10卷 219-226页

作者： mohamed Z.m.Salem mervat EL-Hefny Ramadan A.Nasser hayssam m.ali Nader A.El-Shanhorey Hosam O.Elansary Forestry and Wood Technology Department Faculty of Agriculture(El-Shatby)Alexandria UniversityAlexandriaEgypt Department of Floriculture Ornamental Horticulture and Garden DesignFaculty of Agriculture(EL-Shatby)Alexandria UniversityAlexandriaEgypt Department of Botanical Gardens Research Horticultural Research Institute(ARC)AlexandriaEgypt King Saud University College of ScienceDepartment of Botany and MicrobiologyPO Box 2455Riyadh 11451Saudi Arabia Agriculture Research Center Horticulture Research InstituteSabahia Horticulture Research StationDepartment of Timber Trees ResearchAlexandriaEgypt

Callistemon viminalis(***)is a plant that has been reported to have a various medicinal values such as antibacterial,antifungal,antioxidant activities and other pharmaceutical and insecticidal *** review covers the potentials,applications and properties of different extracts from different parts(branches,flowers,fruits,bark,leaves)of ***,the chemical structures of the bioactive compounds were reported for biological *** the results supported the traditional uses of *** in folk *** addition,some researches supported the use of *** extracts for the preparation of metal oxide nanoparticles.

关键词： Callistemon viminalis Antibacterial activity Antioxidant activity Antifungal activity Essential oils Biological activities

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Insecticidal Potential of α-Pinene and β-Caryophyllene against myzus persicae and Their Impacts on Gene Expression

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Phyton-International Journal of Experimental Botany 2023年第7期92卷 1943-1954页

作者： Talha ali Chohan Tahir ali Chohan muhammad Zahid mumtaz muhammad Waqar Alam Salah ud Din Iqra Naseer Ayesha Riaz Tayyeba Naseem Areeba Iftikhar Dur ENajaf ali mubashir Hassan hayssam m.ali Institute of molecular Biology and Biotechnology(ImBB) The University of LahoreLahore54000Pakistan Institute of Pharmaceutical Sciences University of Veterinary and Animal SciencesLahore54000Pakistan Deparment of Plant Pathology University of OkaraOkara56300Pakistan Deparment of Bioinformatics University of OkaraOkara56300Pakistan Department of Soil Science The Islamia University of BahawalpurBahawalpur63100Pakistan Department of Zoology The Islamia University of BahawalpurBahawalpur(Bahawalnagar Campus)63100Pakistan The Steve and Cindy Rasmussen Institute for Genomic medicine Nationwide Children’s HospitalColumbusOhio43205USA Department of Botany and microbiology College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia

myzus persicae(***)is now considered a threat to agricultural crops due to economic *** synthetic insecticides applied every year against ***,are reported to be unsafe for environment,humans,and beneficial ***,several species of myzus have been found to develop resistance due to over application of these ***,it is required to find some novel insecticide that would be safe for the environment as well as for *** the current study,two major pure constituentsα-pinene andβ-caryophyllene were evaluated for their insecticidal potential against *** using a fumigant toxicity ***,impact ofα-pinene andβ-caryophyllene on expression of five different genes,e.g.,HSP 60,FPPS I,OSD,TOL and ANT responsible for reproduction,dispersion,and growth of *** has also been *** perform fumigant toxicity assay,five different concentrations(3.5,4,4.5,5 and 6μL L−1)ofα-pinene andβ-caryophyllene were *** concentration(LC)was calculated,and gene expression studies were executed through qRT PCR at LC30 ofα-pinene andβ-*** constituents demonstrated excellent fumigant toxicity effects against *** at all five ***,α-pinene shows significantly better results(98%)as compared toβ-caryophyllene(80%)after 72 h at 6μL L−1 of *** highest upregulation in expression was demonstrated at LC30 dose ofα-pinene in five in three out of five genes understudy(TOL,ANT,and FPPS I).Conversely,two genes HSP 60 and OSD demonstrated downregulation at LC30 dose ofβ-***,our results highlighted the promising insecticidal potential of both compoundsα-pinene andβ-caryophylleneby interfering with the reproduction and development related processes in ***,allowing us to recommend the phytoconstituents under investigation as an ecofriendly alternative to synthetic insecticides.

关键词： Fumigation m.persicae gene expression real time PCR α-pinene β-caryophyllene

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Evaluation of extracts and essential oil from Callistemon viminalis leaves:Antibacterial and antioxidant activities,total phenolic and flavonoid contents

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Asian Pacific Journal of Tropical medicine 2013年第10期6卷 785-791页

作者： mohamed Zm Salem hayssam m.ali Nader A El-Shanhorey Ahmed Abdel-megeed Forestry and Wood Technology Department Faculty of Agriculture(EL-Shatby)Alexandria University Botany and microbiology Department College of ScienceKing Saud University Timber Trees Research Department Sabahia Horticulture Research StationHorticulture Research InstituteAgriculture Research Center Department of Botanical Gardens Research Horticultural Research Institute(ARC) Faculty of Agriculture(Saba Basha) Alexandria University

Objective:To investigate antioxidant and antibacterial activities of Callistemon viminalis(***)***:The essential oil of *** leaves obtained by hydrodistillation was analyzed by GC/*** extracts were tested for total phenolic and flavonoid contents and in vitro antioxidant(DPPH assay)and antibacterial(agar disc diffusion and 96-well micro-plates methods)***:Fourteen components were identified in the essential oil,representing 98.94%of the total *** major components were 1,8-cineole(64.53%)andα-pinene(9.69%).Leaf essential oil exhibited the highest antioxidant activity of(88.60±1.51)%comparable to gallic acid,a standard compound[(80.00±2.12)%].Additionally,the biggest zone of inhibitions against the studied bacterial strains was observed by the essential oil when compared to the standard antibiotic(tetracycline).The crude methanol extract and ethyl acetate fraction had a significant antibacterial activity against the tested bacterial ***:It can be suggested that *** is a great potential source of antibacterial and antioxidant compounds useful for new antimicrobial drugs from the natural *** present study revealed that the essential oil as well as the methanol extracts and ethyl acetate fraction of *** leaves exhibited highly significant antibacterial activity against the tested bacterial strains.

关键词： Callistemon viminalis Essential oil Antibacterial activity Antioxidant activity Phenolic content Flavonoid content

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