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\hypersetup{pdftitle={Influence of Water Deficit on Morphological Traits, Protein and Proline Content in Alfalfa (\textit{Medicago Sativa} L.) Ecotypes  },pdfauthor={Kamal Sadatasilan, Seyed Ali Mohammad Modarres-Sanavy},pdfsubject={Tropentag 2010: Abstract},pdfkeywords={Alfalfa, proline, protein, water stress},pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 14-16, 2010, Zurich}}\\[1ex] \Large{``World Food System  ---\\A Contribution from Europe''\\[2ex]}}
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\Large{\textbf{Influence of Water Deficit on Morphological Traits, Protein and Proline Content in Alfalfa (\textit{Medicago Sativa} L.) Ecotypes  \footnote{\textbf{Contact Address:} Kamal Sadatasilan, Payame Noor University, Karaj Center, Karaj, Iran, \mbox{e-mail}: \email{sadatesmaelan@yahoo.com}}\\[0.8ex]}}
\normalsize{\textsc{Kamal Sadatasilan$^{1}$, Seyed Ali Mohammad Modarres-Sanavy$^{2}$}}
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\begin{itemize*}
\item[]{\small{\textit{$^{1}$Payame Noor University, Karaj Center, Iran}}}
\item[]{\small{\textit{$^{2}$Tarbiat Modares University, Agronomy, Iran}}}
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\index[author]{Sadatasilan, Kamal}
\index[author]{Modarres-Sanavy, Seyed Ali Mohammad}
\begin{center}
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\textbf{Abstract}
\begin{abstract}
\normalsize{
Water"=deficit stress induces numerous biochemical and physiological responses in plants. Adverse environ$\lnot$mental conditions such as drought and high soil salinity are among the major factors limiting the growth and pro$\lnot$ductivity of land plants. Water stress is a serious environmental problem throughout the world which may be partially relieved by breeding cultivars that can tolerate low soil water potentials. Alfalfa (\textit{Medicago sativa} L.) is normally grown in arid and semi"=arid areas, so the investigation of alfalfa potential for drought tolerance and the proper selection of its drought tolerant accessions are very important in this context. The irrigation regimes, as main factor, scheduling based on available water depletion included 85 (in second cut), 70 (in third cut), and 55 (in fourth cut) as first and \mbox{40\,\%} as second treatment regimes (control). Ten ecotypes of alfalfa (Hokm-Abad, Chaleshtar, Sekoel, Mohajeran, Gale-Bani, Gargalog, Sereiver, Famnin, Kozre and Diablovarde) were randomised on sub plot units. In each year four cuts were harvested and in each cut total fresh and dry weight, plant height, leaf to stem ratio, the percentage of protein and proline content were measured. The results showed that with increasing water stress, most of the characters were decreased significantly. With increasing water stress, proline accumulation increased. There was a significant difference among the accessions in most of the attributes studied. In comparison among alfalfa ecotypes, ecotype Sekoel was selected as superior in case of the high dry weight matter under normal condition and Gargalog was selected in water stress condition because of high plant height, fresh and dry weight. }

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\noindent \textbf{Keywords:} Alfalfa, proline, protein, water stress
\index[key]{Alfalfa}
\index[key]{Proline}
\index[key]{Protein}
\index[key]{Water!stress}
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