学术活动
学术活动

植物科学前沿系列讲座

2019-10-31

PSC Frontier Seminar series
 
Title 1: Molecular Function of Florigen
Speaker: Prof. Hiroyuki Tsuji, Kihara Insititute for Biological Research, Yokohama City University
Time: 1:00 pm
Day/Date: November 7th, 2019 (Thursday)
Host: Prof. Yoji Kawano
Venue: PSC Auditorium
 
Abstract: 
Florigen is a mobile flowering signal in plants that has a strong impact on plant reproduction and is considered one of the important targets for crop improvement. At the molecular level, florigen is represented as a protein product encoded by the FLOWERING LOCUS T (FT) gene, which is highly conserved across flowering plant. Recent advances in molecular genetics, cell biology and structural biology in plants revealed the presence of intercellular receptors for florigen, a transcriptional complex essential for florigen to function, and also shed light on the molecular basis of pleiotropic function of florigen beyond flowering. Furthermore, cutting-edge technologies, such as live cell imaging and multiple omics analysis with next generation sequencing revealed the precise distribution of florigen and transcriptional targets of the florigen activation complex (FAC) during early stages of floral transition. The talk will describe our latest understanding of these fundamental mechanism, how they intersect to give robust and quantitative regulation and how these mechanisms have been modulated during floral transition.
 
 
Title 2: Plant Interactions with bacterial pathogens and microbiota
Speaker: Prof. Kenichi Tsuda, College of Plant Sciences and Technology, Huazhong Agricultural University; Department of Plant Microbe Interactions, Max Planck Institute for Plant Breeding Research
Time: 2:00 pm
Day/Date: November 7th, 2019 (Thursday)
Host: Prof. Yoji Kawano
Venue: PSC Auditorium
Abstract: 
Plants are colonized by commensal, beneficial, and pathogenic microbes such as bacteria that significantly affect plant growth and reproduction in nature. Plants require bacterial colonization for their survival in nature, but ironically, some bacteria cause serious disease to plants, pointing to a dilemma that plants face. Therefore, plants need to discriminate between good and bad bacteria and control their behavior. We study plant immune responses and responses of pathogenic as well as commensal to beneficial bacteria during the interaction using multi-omics as well as molecular genetics approaches. These results illuminate mechanistic insights into how plants and bacteria interact to determine the consequence of the interaction. We also extend our analysis to understand how such plant-bacterial interactions are influenced by environmental factors such as high salinity and drought. If time allows, I will touch the co-evolution of plant-bacteria interactions. 
 
 
Title 3: Lessons from desert microbes how to grow crops in extreme environments
Speaker: Prof. Heribert Hirt, King Abdullah University of Science and Technology, Saudi Arabia.
Time: 3:00 pm
Day/Date: November 7th, 2019 (Thursday)
Host: Prof. Alberto Macho & Prof. Rosa Lozano-Duran
Venue: PSC Auditorium
 
Abstract: 
A major global challenge of any country in this century is to achieve food security. This is largely hindered by excessive heat, salinity and a lack of water, making up for 60% of annual yield losses. Moreover, 20% of Earth’s land surface are made up of desert regions, which are currently considered unfit for agriculture. A simple solution to the above challenge would be to expand agriculture to so far unused land and use abundantly available saline water. Since most crops lack the ability to cope with salinity, major plant breeding efforts are underway to enhance crop tolerance to salt stress. However, these costly and long-term approaches so far provided mostly disappointing results. In contrast, rhizosphere microbes from desert plants showed that various crops can be grown on marginal lands using saline irrigation, making a big step forward towards food security in the future. We show that the certain desert bacterial endophytes can enhance salt tolerance of crops by favourably reducing salt uptake into the shoots. A molecular analysis of the plant-microbial interaction in Arabidopsis unravelled a major role of the sulfur pathways in both organisms and a coordinate regulatory role of plant ethylene signalling in this process. These findings open new possibilities for breeding salt-adapted crops and tailoring functional synthetic communities to complement deficiencies in soil, crop and disease resistance.

 
The seminars will be delivered in English.