\documentclass[english,german]{scrartcl}
\usepackage[latin1]{inputenc}
\usepackage{geometry}
\geometry{verbose,a4paper,tmargin=1.75cm,bmargin=2cm,lmargin=2cm,rmargin=2cm,headheight=0.8cm,headsep=0.5cm,footskip=0.5cm}
\usepackage{babel}
\usepackage{url}
\urlstyle{same}
\newcommand\email{\begingroup \urlstyle{same}\Url}\usepackage{graphicx}
\usepackage{units}
\usepackage{tabularx}
\usepackage{wasysym} % enable use of \permil instead of \textperthousand
\usepackage{marvosym}
\usepackage{arabtex}
\usepackage{hyphenat}
\usepackage{booktabs}
\usepackage{mdwlist}
\renewcommand{\thefootnote}{\relax}
\usepackage{index}
\newindex{key}{kdx}{knd}{Keywords}
\newindex{author}{idx}{ind}{Authors}
\usepackage{fancyhdr}
\pagestyle{fancy}
\renewcommand{\headrulewidth}{0pt}
\fancyfoot{}
\usepackage{ifpdf}
\ifpdf
%\usepackage[activate]{pdfcprot}
%\usepackage[owner=Tapioka, print=true, copy=true, edit=false, annotate=false,set]{pdfcrypt}
%encryption: not supported any more (since pdftex 1.10)
\usepackage[pdftex]{thumbpdf}
\usepackage[pdftex]{hyperref}
\hypersetup{pdftitle={ effect of Mycorrhizal Fungus on some Root Features Medicinal Plant   Stevia in Hydroponic System },pdfauthor={Nasrinsadat Seyedmohammadi, Morteza Barmaki, Mahdi Davari, Nasrin Seyedmohammadi},pdfsubject={Tropentag 2018: Abstract},pdfkeywords={Medicinal plant, planting bed, nutritional solution},pdfpagemode=None,colorlinks=true}
\else
\usepackage{ae}
\usepackage{textcomp}
\fi
\begin{document}
\ifpdf
\parbox[b]{2.5cm}{\resizebox*{2.5cm}{!}{\includegraphics{dtt2018.jpg}}}
\else
\parbox[b]{2.5cm}{\resizebox*{2.5cm}{!}{\includegraphics{dtt2018.eps}}}
\fi
\hfill
\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 17-19, 2018, Ghent}}\\[1ex] \Large{``Global food security and food safety:\\The role of universities''\\[2ex]}}
\hspace{0.1cm}
\begin{center}
\Large{\textbf{ effect of Mycorrhizal Fungus on some Root Features Medicinal Plant   Stevia in Hydroponic System \footnote{\textbf{Contact Address:} Nasrinsadat Seyedmohammadi, Mohghegh Ardebili University (UMA), Iran, Faculty of Agricultural and Natural Resources, Mohghegh Ardebili University (UMA) Iran, Ardabil, Iran, \mbox{e-mail}: \email{nasrinseyedmohammadi@yahoo.com}}\\[0.8ex]}}
\normalsize{\textsc{Nasrinsadat Seyedmohammadi$^{1}$, Morteza Barmaki$^{2}$, Mahdi Davari$^{3}$, Nasrin Seyedmohammadi$^{4}$}}
\end{center}
\begin{itemize*}
\item[]{\small{\textit{$^{1}$Mohghegh Ardebili University (UMA), Iran, Faculty of Agricultural and Natural Resources, Iran}}}
\item[]{\small{\textit{$^{2}$Mohghegh Ardebili University (UMA), Iran, Faculty of Agricultural and Natural Resources, }}}
\item[]{\small{\textit{$^{3}$Mohghegh Ardebili University (UMA), Iran, Faculty of Agricultural and Natural Resources, }}}
\item[]{\small{\textit{$^{4}$University of Mohaghegh Ardabili, Departmment of Agronomy and Plant Breeding, Iran}}}
\end{itemize*}
\index[author]{Seyedmohammadi, Nasrinsadat}
\index[author]{Barmaki, Morteza}
\index[author]{Davari, Mahdi}
\index[author]{Seyedmohammadi, Nasrin}
\begin{center}
\vspace{1.1cm}
\textbf{Abstract}
\begin{abstract}
\normalsize{
Stevia (\textit{Stevia rebaudiana}) is a source of strong, natural and  free of calorie that is mainly used in industries and pharmacy. With respect to the importance of this plant, extracting sweetening compounds from this demands production of considerable biomass. Stevia rebaudiana, a herbaceous perennial shrub contains steviol glycosides, as an alternative source of sugar for diabetic patients.  Therefore, the effects of mychorrhizal fungus on some characteristics of Stevia's root organ were studied in a factorial experiment based on completely randomised blocks with 4 replications conducted in a greenhouse at Mohghegh Ardebili University in 2014. The first factor included Imma \& Angel and Novell nutrient solutions; the second factor included the Planting bed that consisted of leaf mold, vermicompost, and Peat and perlite, and finally, third factor included the inoculation with mychorrhizal fungus and control treatment. The results showed that the highest percentage of root colonisation with mycorrhizal was associated with the Novella nutrient solution and vermicompost planting bed, the maximum length of myrrhizae roots and dry weight of the mycorrhizal roots of the Imma \& Angel solution and the vermicompost planting bed. In addition, Novell in vermicompost planting bed yielded the largest root volume, root surface and root length after inoculation with mychorrhizal fungus. The largest Root Specific Weight, root fresh weight and root dry weight was observed in case of Imma \& Angel solution in vermicompost medium (inoculated with mychorrhizal fungus). Greatest root density was found in Imma \& Angel solution in leaf mold medium without mychorrhizal fungus inoculation.}

\vspace{0.5cm}
\end{abstract}
\end{center}
\noindent \textbf{Keywords:} Medicinal plant, planting bed, nutritional solution
\index[key]{Medicinal plant}
\index[key]{Nutritional solution}
\end{document}
