Atlas Journal of Biology http://journals.atlas-publishing.org/index.php/AJB <p>Atlas Journal of Biology is an open access, peer-reviewed international journal that publishes original research articles, short communications, and review articles in all fields of Biological Sciences.</p> en-US editor@atlas-publishing.org (Abdelmajid Kassem) editor@atlas-publishing.org (Abdelmajid Kassem) Sun, 25 Feb 2018 16:45:57 +0000 OJS 3.1.1.2 http://blogs.law.harvard.edu/tech/rss 60 Verticillium dahliae-eggplant as the pathosystem model to reveal biocontrol potential of three Trichoderma spp in green house conditions http://journals.atlas-publishing.org/index.php/AJB/article/view/172 <p>In this study three <em>Trichoderma </em>species isolated from Moroccan soil (natural and agricultural habitats) were investigated for their biocontrol potential against virulent <em>Verticillium dahliae </em>on eggplant in green house conditions based on dipping root approach. Evaluation of biocontrol efficacy of <em>Trichoderma</em> spp. demonstrated effective potential of <em>Trichoderma</em> on reducing <em>Verticilium</em> disease on eggplant cultivars. Disease assessment was established by measuring disease incidence in root units (DI-RU) and in the above ground of eggplant cultivars (DI- AU). DI-RU% was recorded at 12.5%, 25.0%, 31.3% and 37.5% in T3, TC, T1 and T2 treatment respectively where DI-RU recorded in Tm2 controls; eggplants inoculated with <em>Verticillium</em> only was equal to 100.0%. Whereas, disease incidence outcomes in aerial part was DI- AU = 100.0 % in treatments TC and T2, 87.5% in T1 and 96.0% in T3 treatment where Tm2 controls were assessed with 100.0%.</p> Wafaa Mimoun Mokhtari, Mohamed Achouri, Abdellah Remah, Hassan Boubaker ##submission.copyrightStatement## http://journals.atlas-publishing.org/index.php/AJB/article/view/172 Sun, 25 Feb 2018 00:00:00 +0000 Proceedings of the Fourth International American Moroccan Agricultural Sciences Conference - AMAS Conference IV, May 9-11, 2018, Meknes, Morocco http://journals.atlas-publishing.org/index.php/AJB/article/view/175 <p>The International American Moroccan Agricultural Sciences Conference (AMAS Conference; www.amas-conference.org) is an international conference organized by the High Council of Moroccan American Scholars and Academics (HC-MASA; www.hc-masa.org) in collaboration with various universities and research institutes in Morocco. AMAS IV was held on May 9-11, 2018 in Meknes, Morocco. The current proceedings summarizes abstracts from 73 oral presentations and 168 posters that were presented during AMAS Conference IV.</p> Abdelmajid Kassem, Alan Walters, Karen Midden, Khalid Meksem ##submission.copyrightStatement## http://journals.atlas-publishing.org/index.php/AJB/article/view/175 Fri, 22 Jun 2018 15:17:09 +0000 Assessment of the resistance of four nitrogen-fixing Bacteria to glyphosate http://journals.atlas-publishing.org/index.php/AJB/article/view/176 <p>The presence of residual pesticides in the soil affect the microbial Communities, as well continuous use of pesticides exacerbates this problem. Glyphosate is one of the most used herbicides in the world. Up to date several studies have evaluated the tolerance and resistance of bacteria to glyphosate. Nitrogen-fixing bacteria and has a very important role in soil fertility, thus altering of this bacterial communities of soil decrease the soil fertility. The objective of this study was to evaluate the effect of glyphosate application on four bacterial strains <em>Pantoea agglomerans, Rhizobium nepotum, Rhizobium radiobacter </em>and<em> Rhizobium tibeticum</em>. Glyphosate was applied as the sole source of carbon at a rate (0 g/l, 0.5 g/l, 1g/l, 3g/l, 6g/l and 12 g/l) with two methods.&nbsp; Microbial growth was measured by Colony Forming Units (CUF /ml). Comparing with the control, the result shown that the growth of the four strains decreased by increasing the concentration of glyphosate. The four strains shown resistance to glyphosate in the direct enrichment compared to the continued enrichment method. Comparing strains with each other, <em>Rhizobium radiobacter</em> is the most resistant strain to glyphosate</p> Jamal Ibijbijen, Mohamed Maldani, Btissam Ben Messaoud, Laila Nassiri ##submission.copyrightStatement## http://journals.atlas-publishing.org/index.php/AJB/article/view/176 Sun, 12 Aug 2018 00:00:00 +0000 Mirabilis expansa Growth, Yield, and Quality Traits: First US Field Trials for an Ancient, Endangered, Andean Crop http://journals.atlas-publishing.org/index.php/AJB/article/view/174 <p>Crop introductions have historical importance.&nbsp; Ancient, endangered, Andean root and forage crop <em>Mirabilis expansa</em> (Ruiz and Pav.) Standl. (Nyctaginaceae), has high quality starch and protein, is drought resistant, and exhibits high morphological variation on individuals.&nbsp; Leaves are used for animal forage, roots for human food.&nbsp; Processing of the calcium oxalate could make <em>M. expansa</em> a significant modern crop.&nbsp; Cultivated varieties 'L' and 'T’ were grown in constructed, lysimeter sand plots in southern Illinois 2008—2009. &nbsp;There was sufficient survival and growth data for var. ‘L’ for testing with Repeated Measures ANOVAs.&nbsp; Tables of mean averages of harvest data are included for each variety.&nbsp; Var. ‘L’ plots had three levels of soil amendments plus all-sand as the control.&nbsp; Plant height, longest and typical axial shoot length, emerging axial and lateral shoot numbers, lamina length with and without petiole included, lamina width, and estimated herbivory, all had significance at P&lt;0.05, for tracking growth in at least some soil amendments.&nbsp;&nbsp; The 3% (w/w) steer manure amendment was optimal for growth. <em>M. expansa</em> cultivars were therefore shown as adapted to the southern Illinois climate in the modified plots.&nbsp; <em>M. expansa</em> is unlikely to become invasive or a major crop where standing water persists in the root zone.</p> Miriam Kritzer Van Zant, Ken Diesburg, David A. Lightfoot ##submission.copyrightStatement## http://journals.atlas-publishing.org/index.php/AJB/article/view/174 Wed, 12 Sep 2018 15:00:56 +0000