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\hypersetup{pdftitle={Morphological and Physiological Responses of Seagrape (\textit{Coccoloba uvifera} L.) Seedlings of Different Provenances to Salt Stress},pdfauthor={Raúl C. López Sánchez, Ernesto Javier Gómez Padilla, Roeland Samson, Patrick Van Damme, Miajil Bullain Galardis, Juan Antonio Torres Rodriguez, Amadou Ba, Ludovic Pruneau, Bettina Eichler-Loebermann},pdfsubject={Tropentag 2018: Abstract},pdfkeywords={Coccoloba uvifera, provenances, salt stress, tolerance},pdfpagemode=None,colorlinks=true}
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\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]}}
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\begin{center}
\Large{\textbf{Morphological and Physiological Responses of Seagrape (\textit{Coccoloba uvifera} L.) Seedlings of Different Provenances to Salt Stress\footnote{\textbf{Contact Address:} Bettina Eichler-Loebermann, University of Rostock, Fac. of Agricultural and Environmental Sciences, J. von Liebig Weg 6, 18059~Rostock, Germany, \mbox{e-mail}: \email{bettina.eichler@uni-rostock.de}}\\[0.8ex]}}
\normalsize{\textsc{Raúl C. López Sánchez$^{1}$, Ernesto Javier Gómez Padilla$^{1}$, Roeland Samson$^{2}$, Patrick Van Damme$^{3}$, Miajil Bullain Galardis$^{1}$, Juan Antonio Torres Rodriguez$^{1}$, Amadou Ba$^{4}$, Ludovic Pruneau$^{4}$, Bettina Eichler-Loebermann$^{5}$}}
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\begin{itemize*}
\item[]{\small{\textit{$^{1}$University of Granma, Fac. of Agricultural Sciences, Cuba}}}
\item[]{\small{\textit{$^{2}$University of Antwerp, Dept. of Bioscience Engineering, Belgium}}}
\item[]{\small{\textit{$^{3}$Ghent University, Dept. of Plant  Production - Lab. for Tropical Agronomy, Belgium}}}
\item[]{\small{\textit{$^{4}$Antilles University, Guadeloupe}}}
\item[]{\small{\textit{$^{5}$University of Rostock, Fac. of Agricultural and Environmental Sciences, Germany}}}
\end{itemize*}
\index[author]{López Sánchez, Raúl C.}
\index[author]{Gómez Padilla, Ernesto Javier}
\index[author]{Samson, Roeland}
\index[author]{Van Damme, Patrick}
\index[author]{Bullain Galardis, Miajil}
\index[author]{Torres Rodriguez, Juan Antonio}
\index[author]{Ba, Amadou}
\index[author]{Pruneau, Ludovic}
\index[author]{Eichler-Loebermann, Bettina}
\begin{center}
\vspace{1.1cm}
\textbf{Abstract}
\begin{abstract}
\normalsize{
Seagrape (\textit{Coccoloba uvifera}) is a small tree widely distributed along the Atlantic, Caribbean and Pacific coasts of the American tropics and subtropics. It is an important tree for edible fruits, ornamental plantings and coastal windbreaks. Although its tolerance to salt stress was reported, physiological  information on the salt tolerance mechanisms at seedling state is not available. The effect of salt stress on some morphological and ecophysiological traits of seagrape seedlings of different provenances was evaluated under greenhouse conditions. Plants were subjected to different salt levels by adding NaCl (Control, 5, 15, and 25 dS.m$^{-1}$ NaCl) during four weeks. The morphological (shoot height, root length, root and shoot weight and  root/shoot ratio) and physiological (leaf water content, root water content, chlorophyll  fluorescence, specific leaf area and leaf area) traits were evaluated. The salt stress levels had negative effects on morphological traits of seagrape seedlings, whereas the seedlings showed different responses on salt stress in dependence of their provenance. At the highest level of salt stress the seagrape seedlings did not survive. Shoot height and root length were reduced up to \mbox{38\,\%}  and  \mbox{27\,\%}, respectively, at 5 dS.m$^{-1}$ and up to\mbox{72\,\%} and \mbox{73\,\%}, respectively, at 15 dS.m$^{-1}$. The reduction of dry weight was between  \mbox{43\,\%} at 5 dS.m$^{-1}$ and \mbox{74\,\%} at 15 dS.m$^{-1}$. Salt stress also reduced the water content in roots and shoots. This salt stress test with seagrape seedlings can be an effective approach to  screen salt tolerance of seagrape genotypes. However, it is necessary to carry out more studies with seed of other provenances and \textit{in~situ} experiments to obtain further information about salt tolerance of seagrape.}

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\noindent \textbf{Keywords:} \textit{Coccoloba uvifera}, provenances, salt stress, tolerance
\index[key]{Coccoloba uvifera@\textit{Coccoloba uvifera}}
\index[key]{Provenances}
\index[key]{Salt!stress}
\index[key]{Tolerance}
\end{document}
