IN INOCULANTS Nodulaid - 17th International Nitrogen Fixation ...
IN INOCULANTS Nodulaid - 17th International Nitrogen Fixation ... IN INOCULANTS Nodulaid - 17th International Nitrogen Fixation ...
17 th International Congress on Nitrogen Fixation Fremantle, Western Australia 27 November – 1 December 2011 Session Details: Tuesday 29 November 2011 Authors Concurrent Session 9 – Native Legume RNB 1600 - 1720 Euan K. James 1 , Osei Y. Ampomah 2 , Pietro P.M. Iannetta 1 , Gregory Kenicer 3 , Geoff Squire 1 , Janet I. Sprent 4 & Kerstin Huss-Danell 2 1 James Hutton Institute, Invergowrie, Dundee, DD2 5DA, UK 2 Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences (SLU), SE-90183 Umeả, Sweden 3 Royal Botanic Garden, 20A Inverleith Row, Edinburgh EH3 5LR, UK 4 Division of Plant Sciences, College of Life Sciences, University of Dundee at James Hutton Institute, Dundee DD2 5DA, UK Presentation Title: Nodulation and nitrogen fixation in native legumes in Scotland and Sweden Presentation Time: 1640 – 1700 Native legumes in temperate and northern areas have received surprisingly little research attention. Our aim was to get an overview of the nodulation of native legumes in Scotland and Sweden. We collected 24 out of the 47 native legume species in Scotland and 30 out of the 90 in Sweden; 17 species were from both countries. A wide range of habitats were visited. A majority of our collected legumes, e.g. Lathyrus pratensis, Lotus corniculatus, Medicago lupulina, Trifolium spp. and Vicia spp. occurred in many habitats such as meadows, edges of cultivated land, waste ground and road sides. In contrast, other species grew in more specific habitats: Astragalus danicus, Lathyrus japonicus, L. palustris, Tetragonolobus maritimus and Vicia lutea on sea shores and A. alpinus, A. frigidus, Oxytropis campestris and O. lapponica in northern and mountain areas. All collected species were nodulated. Indeterminate (Astragalus, Cytisus, Lathyrus, Medicago, Melilotus, Ononis, Oxytropis, Trifolium, Ulex and Vicia, spp.) and determinate (Anthyllis, Lotus and Tetragonolobus spp.) nodule types were represented. Nitrogen fixation was deduced from pink nodule interior. Nodule anatomy, immunolocalization of nitrogenase and foliar 15 N analysis gave further support for active nitrogen fixation at time of collection. Some native species are closely related to cultivated species of Lotus, Medicago, Trifolium and Vicia. Root nodule bacteria from cultivated and native plants of Lotus corniculatus in Sweden mainly belonged to Mesorhizobium loti even though other Mesorhizobium spp. were associated with some of the naturally growing L. corniculatus plants (Ampomah & Huss-Danell 2011). It seems that native legumes are important to the N cycle at their sites and, in addition, some of their root nodule bacteria may be of interest as inoculants in agriculture. Ampomah OY& Huss-Danell K (2011). Genetic diversity of root nodule bacteria nodulating Lotus corniculatus and Anthyllis vulneraria in Sweden. Syst Appl Microbiol 34:267-275. 62 2011
17 th International Congress on Nitrogen Fixation Fremantle, Western Australia 27 November – 1 December 2011 Session Details: Tuesday 29 November 2011 Concurrent Session 9 – Native Legume RNB 1600 - 1720 Authors: Wen Feng Chen 1 , Chang Fu Tian 1 , Yan Ming Zhang 1 , Qin Qin Li 1 , Jun Jie Zhang 1 , Mao Li 1 , Tian Yan Liu 1 , En Tao Wang 1,2 , Xing Hua Sui 1 , & Wen Xin Chen 1* 1 State Key Laboratory for Agrobiotechnology/College of Biological Sciences, China Agricultural University, Beijing, 100193, China. 2 Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, 11340 México D. F., México Presentation Title: Advances in rhizobial diversity and biogeography in China Presentation Time: 1700 – 1720 Besides the common genera, including the Rhizobium, Bradyrhizobium, Ensifer (former Sinorhizobium), Mesorhizobium which are widespread in China, nodule bacteria associated with leguminous plants are also found in the genera of Burkholderia, Cupriavidus, Shinella and Iniquilinus. By using the polyphasic taxonomy and multilocus sequence analysis (MLSA), nearly 30 novel species were described and published in China since 2006, accounting for more than half of the total novel species published around the world during the same period. Some rhizobial species were only found and reported until now in China though their symbiotic genes were found worldwide. The rhizobial chromosomal core genes and the accessorial symbiotic genes may evolve in different ways to ensure the rhizobia to survive in the environments and to invade the host plant respectively. The increased reports on the non-symbiotic rhizobia isolated from root nodules will be the hot spots for the study of rhizobial diversity in China. The origin of the symbiotic genes and the transferring of them from symbiotic rhizobia to non-symbiotic ones may depend on the mechanism of “loss and gain”. To study the soil factors affecting the diversity and distribution of rhizobia in different regions, biogeography of the rhizobia associated with soybean (Glycine max), as example, were further extensively investigated. We will discuss the crucial factors that determine the distribution of genera of Bradyrhizobium, Sinorhizobium and Mesorhizobium associated with the soybean and the relationship between rhizobia and host plants. 63 2011
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17 th <strong>International</strong> Congress on <strong>Nitrogen</strong> <strong>Fixation</strong><br />
Fremantle, Western Australia<br />
27 November – 1 December 2011<br />
Session Details: Tuesday 29 November 2011<br />
Concurrent Session 9 – Native Legume RNB<br />
1600 - 1720<br />
Authors: Wen Feng Chen 1 , Chang Fu Tian 1 , Yan Ming Zhang 1 , Qin Qin Li 1 , Jun Jie Zhang 1 , Mao<br />
Li 1 , Tian Yan Liu 1 , En Tao Wang 1,2 , Xing Hua Sui 1 , & Wen Xin Chen 1*<br />
1 State Key Laboratory for Agrobiotechnology/College of Biological Sciences, China<br />
Agricultural University, Beijing, 100193, China.<br />
2 Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto<br />
Politécnico Nacional, 11340 México D. F., México<br />
Presentation Title: Advances in rhizobial diversity and biogeography in China<br />
Presentation Time: 1700 – 1720<br />
Besides the common genera, including the Rhizobium, Bradyrhizobium, Ensifer (former Sinorhizobium),<br />
Mesorhizobium which are widespread in China, nodule bacteria associated with leguminous plants are also<br />
found in the genera of Burkholderia, Cupriavidus, Shinella and Iniquilinus. By using the polyphasic taxonomy and<br />
multilocus sequence analysis (MLSA), nearly 30 novel species were described and published in China since<br />
2006, accounting for more than half of the total novel species published around the world during the same<br />
period. Some rhizobial species were only found and reported until now in China though their symbiotic genes<br />
were found worldwide. The rhizobial chromosomal core genes and the accessorial symbiotic genes may evolve<br />
in different ways to ensure the rhizobia to survive in the environments and to invade the host plant respectively.<br />
The increased reports on the non-symbiotic rhizobia isolated from root nodules will be the hot spots for the study<br />
of rhizobial diversity in China. The origin of the symbiotic genes and the transferring of them from symbiotic<br />
rhizobia to non-symbiotic ones may depend on the mechanism of “loss and gain”. To study the soil factors<br />
affecting the diversity and distribution of rhizobia in different regions, biogeography of the rhizobia associated<br />
with soybean (Glycine max), as example, were further extensively investigated. We will discuss the crucial<br />
factors that determine the distribution of genera of Bradyrhizobium, Sinorhizobium and Mesorhizobium<br />
associated with the soybean and the relationship between rhizobia and host plants.<br />
63<br />
2011
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