en Toxicology Toxicology پژوهشي Orginal research papers <font face="Times New Roman" size="3"> </font><p class="MsoNormal" style="margin: 0cm 0cm 0pt text-align: justify line-height: 120% unicode-bidi: embed direction: ltr text-autospace: mso-layout-grid-align: none"><font size="3"><font face="Times New Roman"><span style="mso-bidi-font-family: "Times New Roman" mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-ascii-theme-font: minor-bidi mso-hansi-theme-font: minor-bidi mso-bidi-theme-font: minor-bidi">The accumulation of heavy metals Pb and Cd in the mangrove, <i>Avicennia marina</i>, was studied on the southern coast of Iran, particularly on and near Qeshm Island in the Persian Gulf<b>. </b>The samples were collected from 7 stations which they were analyzed by flame Atomic absorption spectrophotometer after chemical digestion. Maximum Pb and Cd in leaves are (34.50, 3.52 ppm) and minimum of them are in stems (2.00, 0.05 ppm) and<b> </b>the accumulation of metals in leaves is more than stems. </span><span style="mso-fareast-font-family: AdvPSTim mso-bidi-font-family: "Times New Roman" mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-ascii-theme-font: minor-bidi mso-hansi-theme-font: minor-bidi mso-bidi-theme-font: minor-bidi"><span style="mso-spacerun: yes"> </span>The different between monitored stations</span><span style="mso-bidi-font-family: "Times New Roman" mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-ascii-theme-font: minor-bidi mso-hansi-theme-font: minor-bidi mso-bidi-theme-font: minor-bidi"> </span><span style="mso-fareast-font-family: AdvPSTim mso-bidi-font-family: "Times New Roman" mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-ascii-theme-font: minor-bidi mso-hansi-theme-font: minor-bidi mso-bidi-theme-font: minor-bidi">and </span><span style="mso-bidi-font-family: "Times New Roman" mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-ascii-theme-font: minor-bidi mso-hansi-theme-font: minor-bidi mso-bidi-theme-font: minor-bidi">accumulation of metals in tissues<b> </b>(P≥0.01)<b> </b>was not significant<b> </b>and there was no significant relationship between the leaves and stems of metals concentration (P≥0.05) but it was significant relationship between concentration of Pb and Cd in leaf tissue and stem tissue alone. (P<0.05). After entering these metals to food chain, are accumulated in human body and this matter may cause some disease by receiving metals more than </span><span style="mso-bidi-font-family: "Times New Roman" mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-ascii-theme-font: minor-bidi mso-hansi-theme-font: minor-bidi mso-bidi-theme-font: minor-bidi mso-bidi-language: AR-SA">provisional tolerable weekly intake (PTWI) </span><span style="mso-bidi-font-family: "Times New Roman" mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-ascii-theme-font: minor-bidi mso-hansi-theme-font: minor-bidi mso-bidi-theme-font: minor-bidi">of lead and cadmium, in adults which in 0.025 and 0.007 </span><span style="mso-bidi-font-family: "Times New Roman" mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-ascii-theme-font: minor-bidi mso-hansi-theme-font: minor-bidi mso-bidi-theme-font: minor-bidi mso-bidi-language: AR-SA">mg/kg body weight</span><span style="mso-bidi-font-family: "Times New Roman" mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-ascii-theme-font: minor-bidi mso-hansi-theme-font: minor-bidi mso-bidi-theme-font: minor-bidi"> with standards ENHIS.<o:p /></span></font></font></p><font face="Times New Roman" size="3"> </font> Heavy metal, Avicennia marina, Persian Gulf 867 875 http://jifro.ir/browse.php?a_code=A-10-1-205&slc_lang=en&sid=1 E. Shirvani Mahdavi eshirvani@gmail.com 10031947532846004760 10031947532846004760 Yes A. E. Khajeh Rahimi 10031947532846004761 10031947532846004761 No H. Vakili Amini 10031947532846004762 10031947532846004762 No