logo7th International Legume Conference
"Legume Systematics for Next Generation"  29 Aug - 2 Sept 2018,  Sendai,   JAPAN
 

Symposium

Symposia


We plan to hold about 9 symposia. The duration of each session is 90 min and generally for six speakers (15 min each).  Some symposia include two sessions (in total 180 min). Symposium organizers can make a slight change for the number of speakers and presentation time. We will inform detail of symposia soon. Symposia accepted and in preparation are as follows.

 

Symposium Details

Legume morphology: diversity and evolution


Organizers:

Brigitte Marazzi, Natural History Museum of Canton Ticino, Switzerland
Juliana Villela Paulino, Universidade Federal do Rio de Janeiro, Brazil
Leonardo Borges, Universidade Federal de São Carlos, Brazil
Vidal Mansano, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Brazil
Simone de Pádua Teixeira, Universidade de São Paulo, Brazil

Recent advances in the phylogenetic classification of Leguminosae have pointed out for the need to further improve our knowledge on the wide morphological diversity of the family. Morphological studies, besides useful for description of the wide array of phenotypes found in Leguminosae, are necessary to subsidize research on comparative morphology, homology, character evolution and the use of morphology in the systematics of Leguminosae. This symposium will present novelties that fill gaps in the knowledge about the diversity and evolution of legume morphology. Special attention will be given to floral development studies in order to celebrate the work of Dr. Shirley Tucker. Finally, the symposium will also focus on increasing collaborative work integrating legume morphology and systematics in order to produce a community-assembled morphological database.


Root to Tip Legume Phylogenomics: Building the Phylogenetic Foundations for Next Generation Legume Systematics


Organizers:

Colin Hughes, University of Zurich, Switzerland
Toby Pennington, University of Exeter, U.K.
Jeff Doyle, Cornell University, U.S.A.

Phylogenetics is rapidly being transformed into phylogenomics by the quickly growing availability of much larger, genome-scale DNA sequence data sets that can be generated via next generation sequencing (NGS). These new data sets have potential for building much enhanced phylogenies at all phylogenetic levels from the root to the tips of the tree, to resolve both deep higher-level relationships as well as the complex and often reticulate patterns at and around the species level. These data also provide the foundations needed for elucidating gene and genome evolution, including the history of whole genome and gene duplications, as well as levels of congruence / discordance among genes and genomes and signatures of selection, insights which are critical for accurate phylogeny reconstruction. These developments are also revolutionizing how we build phylogenies with promising new approaches and methods emerging. These more robust phylogenetic foundations are critical for marshalling massive amounts of comparative data to address a wide range of systematics questions. Despite major advances, including the recent LPWG phylogeny which encompasses almost all legume genera, reconstructing a robust legume phylogeny remains challenging given the large size of the family and the apparent rapid radiation of legumes as a whole as well as key other clades, that result in short branch lengths. Over the last five years since ILC6 a raft of new legume projects generating NGS data have started. These include new whole genome sequences for key taxa, large scale sequencing of plastomes, transcriptome sequencing of representative taxa across the family, large nuclear gene sequence datasets generated via targeted enrichment (hybrid sequence capture) for a number of legume clades, and RADseq data. This symposium aims to: (i) present results from a range of legume phylogenomics initiatives spanning different hierarchical levels; (ii) provide an overview of data types and approaches for different questions; (iii) review the state of play with respect to available genome-scale data for legumes; and (iv) prompt discussion about strategies for new sequencing efforts and for building the next generation legume phylogeny.


Phylogenetic niche conservatism, biome switching and adaptation in legume evolution


Organizers:

Toby Pennington, University of Exeter, U.K.
Colin Hughes, University of Zurich, Switzerland

The concept of phylogenetic niche conservatism – that organisms tend to maintain their ancestral ecological predilections - has become influential in plant evolution and biogeography. Conversely, some studies show that frequent evolutionary switches, even between major biomes such as tropical forests and savannas, have made a considerable contribution to modern day patterns of species distribution. Because legumes dominate many major biomes they make ideal case studies for investigating phylogenetic niche conservatism and biome switching, and empirical studies based upon legumes continue to play an important role. This symposium will showcase new empirical studies but will also consider the broader conceptual framework for studies of biome-switching in plant evolution. Ultimately, the ability of lineages to switch biomes, or their degree of niche conservatism, is contingent on the ease of evolution of specific adaptations to overcome major adaptive barriers, including suites of critical legume functional traits such as nodulation, frost, drought and fire tolerance, growth forms and leaf characteristics, and the symposium will also consider the evolution and biogeography of some of these key traits.


Evolution and systematics of subfamily Detarioideae


Organizers:

Manuel de la Estrella, University of Cordoba, Spain
Bente Klitgaard, Royal Botanic Gardens, Kew, UK
Anne Bruneau, University of Montreal, Canada

Detarioideae is one of the early diverging clades within legumes and has recently been recognised at the subfamily level by the Legume Phylogeny Working Group. The subfamily comprises 81 genera and c. 760 species distributed across the world tropics. 
The Detarioideae lineage is unusually variable and phylogenetically labile in flower morphology. Recurrent switches in flower morphology are detected across the subfamily, with species ranging from having radially symmetrical flowers with five petals, to having a single large petal or three larger petals in a bilateral arrangement, or entirely lacking petals.
Although no single Detarioideae genus has been found to fix nitrogen, Detarioideae are known to be associated with mycorrhizal fungi; and this association may have played an important role in shaping the diversity and evolution of the group. Many of the tree species belonging to this subfamily dominate large expanses of forest, especially in tropical Africa, where Detarioideae trees can form single species dominated groves; and include some of the hyperdominant species of the Amazon.
This Detarioideae symposium aims to: (i) share results of recent taxonomic efforts in understanding Detarioideae diversity; (ii) show the importance of flower variability and plant-pollinator relationships in the evolutionary patterns observed within Detarioideae; (iii) link phylogenetic and biogeographic studies of Detarioideae clades; and (iv) deepen our understanding of the mycorrizhal associations within Detarioideae and their role in the subfamily dominance of tropical forests.



Legume Evolutionary Genomics


Organizers:

Steven Cannon, United States Department of Agriculture, U.S.A.
Sachiko Isobe, Kazusa DNA Research Center, Japan
Ken Naito, National Agriculture and Food Research Organization, Japan

Evolution is a romance. The deeper we get into, the more we want to understand. Now we have known many things about evolution, but it never gives up surprising us and motivating our curiosity.
To understand evolution, DNA sequences have long been recognized as strong tools. With sequences of ~100 polymorphic sites we could calculate differentiation and diversification among populations and species. 
However, such “population genetics” approaches could hardly tell us direct information of genetic changes behind adaptive traits. Given usual diploid plants have ~30,000 genes, sequencing only 100 genes are far from being enough to find genes responsible for the traits. 
Now genomics changed everything. It is now relatively easy to detect trait-related SNPs and INDELs by genome scan and genome-wide association studies. In this symposium we’d like to introduce how whole genome approaches reveal legume evolutions.



Legume Diversity in Asia


Organizers:

Tetsukazu Yahara , Kyushu University, Japan
Tingshunag Yi, Kunming Institute of Botany, China
Firouzeh Javadi, Kyushu University, Japan

Asia is one of the richest biodiversity regions in the world, and its several subregions recognized as world’s biodiversity hoptspots. With hundreds of new taxa being recorded, described and named every year, species diversity of Asia is far from clear. Meanwhile, flora of Asia is under severe threat of habitat loss by rapid economic development. Asia is also one of the diversification centers for legumes, the diverse habitats have promoted the significant diversification of this group. A series of studies have been carried out to clarify various aspects of legume diversity in Asia. This symposium will present recent achievements on phylogeny, diversification, and species distributionof legume in Asia and will aim to increase collaborative work on legume taxonomy and conservation in this region.


Celebrating 40 years of legume systematics: the productive career of Gwilym P. Lewis


Organizers:

Anne Bruneau, University of Montreal, Canada
Luciano Paganucci de Queiroz, UEFS, Brazil

During his long research career at the Royal Botanic Gardens, Kew, Gwilym P. Lewis has contributed significantly and importantly to the systematics, phylogenetics, biogeography, diversity and comparative biology of neotropical Leguminosae, especially Caesalpinioideae and including mimosoid legumes. His floristic expertise has focused on the drylands and wet tropics of Brazil and the Andes of Ecuador, and he has produced monographic work on the large genus Caesalpinia. His research and publication has been multidisciplinary (including: taxonomic revision, phylogenetic studies, reproductive biology, floral anatomy, phytochemistry and biogeography) and has involved international networks. Gwil Lewis has provided specialist legume identification services which have facilitated legume work in conservation and sustainable use, and guided student training both within Kew and globally. His higher level systematic studies have contributed to an improved legume phylogeny from which the legume research community has developed the new classification of the family. In his long career, dedicated to legumes, Gwil Lewis has seen legume systematics evolve from a taxonomic and floristically focused research community to a phylogenetically-based, hypothesis driven science motivated by questions of global biome distribution to flower evolution and genomics. Dr. Lewis has been a witness to the major changes in our research community over the past 40 years, and particularly since the publication of the first volume of Advances in Legume Systematics in 1981. This symposium is dedicated to Gwilym P. Lewis and to his important contribution to legume systematics.


Evolution and diversity of Legume - Soil Bacteria Symbiosis


Organizers:

Milagros Leon Barrios, La Laguna University, Spain
Kojiro Takanashi, Shinshu University, Japan
Tadashi Kajita, University of the Ryukyus, Japan

The mutualistic symbiosis between legume plants and the soil bacteria called rhizobia is a rather complicated interaction that results in the development of nitrogen-fixing root nodules. Through nodulation with the rhizobia, legumes obtain ammonia from the atmospheric nitrogen, which results in legumes being a rich source of protein. Despite Leguminosae being one of the largest families of plants, only a small number of species had been studied with regard to their symbiotic rhizobia, until recent years. These were mainly those of agricultural interest. This situation has changed in the last two decades, through applying sequencing techniques to bacterial taxonomy and the isolation of root nodule bacteria from many legume species worldwide. Consequently, a huge unexpected diversity of rhizobia is being revealed. Current challenges in studying the legume-root nodule bacteria symbiosis include the need to extend our understanding of rhizobial diversity to previously unresearched legumes, in particular to ecologically important wild legumes growing in different geographic zones and contrasting habitats. This symposium will comprise several talks, including different aspects of the rhizobia-Lotus symbiosis in the Canary Islands, using traditional sequencing techniques and metagenomic analysis.


Taxonomy, phylogeny and conservation of tribe Dalbergieae


Organizers:

Mohammad Vatanparast, University of Copenhagen, Denmark
Bente B. Klitgård, Royal Botanic Gardens, Kew, UK

The Dalbergioid clade in the subfamily Papilionoideae comprises three subclades: the Dalbergia, Pterocarpus and Adesmia clades. Together they comprise 42 genera and 1,200-1,300 species of trees, shrubs, and herbs inhabiting a wide range of both humid and dry environments. While the clade is pantropical in distribution, about 70% of the species diversity is restricted to Central and South America. The clade is commercially important in that it includes some of the world`s most valuable timber trees, e.g. the rosewoods (Dalbergia, Pterocarpus and Machaerium species). Other taxa provide human and animal food (e.g. species of Arachis, Zornia, Stylosanthes, and Aeschynomene), soil improvement through the fixing of atmospheric nitrogen, medicine (e.g. species of Pterocarpus and Machaerium), and are grown as garden, park and street ornamentals (e.g. Tipuana tipu, Amicia zygomeris and A. glandulosa). Previous studies have largely resolved genus circumscription within the clade but reliable species delimitations are still lacking in some of the most speciose genera, including Dalbergia, Machaerium, and Aeschynomene. Given the ecological and economical importance of the clade, efforts to define “good species” and species extinction risks assessments are urgently needed so that conservation strategies can be put in place to mitigate against habitat loss due to mining, logging, agriculture and urban expansion. The symposium will: 1) share recent advances in taxonomic and systematic efforts to better understand the diversity of the Dalbergieae, 2) share knowledge about the current state of conservation of species belonging to the Dalbergiod clade, and 3) aim to establish an international working group of systematists specialising in the Dalbergieae for future collaborations.