Bernstein, Aaron, Naturwissenschaftliche Volksbücher, Bd. 6/11, 1897

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        <div xml:id="echoid-div44" type="section" level="1" n="38">
          <p>
            <s xml:id="echoid-s1384" xml:space="preserve">
              <pb o="17" file="105" n="105"/>
            verbunden, ſondern nur durcheinander gemengt ſind. </s>
            <s xml:id="echoid-s1385" xml:space="preserve">— Um zu
              <lb/>
            dieſen Stoffen und zu dem Waſſer zu gelangen, ohne welches
              <lb/>
            Leben unmöglich iſt, benutzt die Pflanze die Wurzeln.</s>
            <s xml:id="echoid-s1386" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div47" type="section" level="1" n="39">
          <head xml:id="echoid-head46" xml:space="preserve">
            <emph style="bf">V. Die Speiſung der Pflanze durch die Wurzel.</emph>
          </head>
          <p>
            <s xml:id="echoid-s1387" xml:space="preserve">Das Eindringen der mineraliſchen und ſtickſtoffhaltigen
              <lb/>
            Pflanzennahrung in die Pflanze geſchieht, wie bereits erwähnt,
              <lb/>
            hauptſächlich durch die Wurzel, und zwar findet ſowohl Waſſer,
              <lb/>
            wie die Stickſtoffnahrung und die Salze, durch die in der Erde
              <lb/>
            liegende Wurzel den Weg zum Innern der Pflanze.</s>
            <s xml:id="echoid-s1388" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1389" xml:space="preserve">Man macht ſich im gewöhnlichen Leben die Vorſtellung,
              <lb/>
            daß eine Wurzel das Waſſer ſo auſſauge, wie etwa ein Stück
              <lb/>
            Löſchpapier, das man mit einem Ende in Waſſer taucht, wo
              <lb/>
            man ſofort bemerkt, daß das Waſſer ſich weiter in das Papier
              <lb/>
            hineinzieht. </s>
            <s xml:id="echoid-s1390" xml:space="preserve">Man denkt ſich gemeinhin, daß das Waſſer von
              <lb/>
            der Wurzel aus in die Pflanze hineinſteigt, ebenſo, wie wenn
              <lb/>
            man ein Stück weißen Zucker mit einer Ecke in den Kaffee
              <lb/>
            taucht und ſofort wahrnimmt, daß die Flüſſigkeit in den Zucker
              <lb/>
            hinaufläuft.</s>
            <s xml:id="echoid-s1391" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1392" xml:space="preserve">Dieſe Vorſtellung iſt ganz falſch. </s>
            <s xml:id="echoid-s1393" xml:space="preserve">Es iſt zwar nicht lange
              <lb/>
            her, daß ſelbſt die Gelehrten ſolche Vorſtellung von der Ver-
              <lb/>
            breitung der Flüſſigkeiten in den Pflanzen hatten; </s>
            <s xml:id="echoid-s1394" xml:space="preserve">die neuere
              <lb/>
            Wiſſenſchaft indeſſen iſt durch genauere Unterſuchungen zu der
              <lb/>
            Überzeugung gekommen, daß die Verbreitung der Flüſſigkeiten
              <lb/>
            im Pflanzenkörper auf ganz anderem Wege vor ſich geht.</s>
            <s xml:id="echoid-s1395" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1396" xml:space="preserve">Die Pflanzenkörper beſtehen ja (Fig. </s>
            <s xml:id="echoid-s1397" xml:space="preserve">3) aus dicht aneinander
              <lb/>
            gedrängten, ganz kleinen Zellen, die im lebenden Zuſtande mit
              <lb/>
            Flüſſigkeit erfüllt ſind. </s>
            <s xml:id="echoid-s1398" xml:space="preserve">Die Wände der Zellen beſitzen die
              <lb/>
            Eigenſchaft, die Flüſſigkeit durch eine Art Ausſchwitzung von
              <lb/>
            ſich zu geben und dafür durch Einſchwitzung eine Flüſſigkeit
              <lb/>
            aufzunehmen; </s>
            <s xml:id="echoid-s1399" xml:space="preserve">und dieſes Aus- und Einſchwitzen geſchieht</s>
          </p>
          <p>
            <s xml:id="echoid-s1400" xml:space="preserve">A. </s>
            <s xml:id="echoid-s1401" xml:space="preserve">Bernſtein, Naturw. </s>
            <s xml:id="echoid-s1402" xml:space="preserve">Volksbücher VII.</s>
            <s xml:id="echoid-s1403" xml:space="preserve"/>
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