Plant Process and Function
فرآیند و کارکرد گیاهی
Journal of Plant Process and Function
Agriculture
http://jispp.iut.ac.ir
1
admin
2322-2727
2383-3688
10.22034
fa
jalali
1399
5
1
gregorian
2020
8
1
9
37
online
1
fulltext
en
Growth and some physiological characteristics of alfalfa (Medicago sativa L.) in response to lead stress and Glomus intraradices symbiosis
تنش فلزات سنگین
Toxic ions stress
پژوهشي
Research
<div style="text-align: justify;"><strong>Lead is a nonessential element that has a negative effect on plant growth and development. Plant symbiosis with arbuscular mycorrhizal fungi (AMF) in soils contaminated with heavy metals can affect growth of plant, nutrition and tolerance against heavy metals. In this study, the effect arbuscular mycorrhizal fungi <em>Glomus intraradices</em> on the growth, photosynthetic pigments, protein content, proline, pheno</strong><strong>l</strong><strong> and </strong><strong>activities of antioxidant enzymes</strong><strong> in </strong><strong>alfalfa plants under Pb toxicity were examined.</strong><strong> The experiment was performed by using two treatments (mycorrhizal and non-mycorrhizal) and five lead concentrations (0, 60, 120, 180 and 240 µm Pb(NO<sub>3</sub>)<sub>2</sub>).</strong> <strong>Results showed that Pb stress decreased plant growth, </strong><strong>photosynthetic pigments </strong><strong>and protein content, however AMF improved them. Amount of proline, phenol and</strong><strong> antioxidant enzymes activity increased with lead increasing. </strong><strong>Amount of them</strong><strong> in roots of AMF plants in comparison with non-AMF plants increased. </strong><strong>Leaves of AMF plants had more superoxide dismutase activity comparison with non-AMF plants.</strong><strong> However </strong><strong>proline content, </strong><strong>activity of catalase and guaiacol proxidase in leaves of mycorrhizal plants, were lower than those of non-mycorrhizal plants</strong><strong>. In addition, mycorrhizal colonization significantly decreased with Pb exposure. These results, suggested that </strong><strong><em>G. intraradices </em></strong><strong>can decrease Pb toxicity in alfalfa plants.</strong></div>
<div style="text-align: justify;"></div>
Mycorrhiza, Lead, Heavy metals, Antioxidant enzymes, Alfalfa
1
12
http://jispp.iut.ac.ir/browse.php?a_code=A-10-333-6&slc_lang=en&sid=1
Samaneh
Kahromi
Kahromi.s@gmail.com
100319475328460020781
100319475328460020781
No
Department of Plant Sciences, Kharazmi University, Tehran
Farzaneh
Najafi
Najafi_f@khu.ac.ir
100319475328460020782
100319475328460020782
Yes
Department of Plant Sciences, Kharazmi University, Tehran