32 research outputs found
Genetic variation in strigolactone production and tillering in rice and its effect on Striga hermonthica infection
Tillering in cereals is a complex process in the regulation of which also signals from the roots in the form of strigolactones play an important role. The strigolactones are signalling molecules that are secreted into the rhizosphere where they act as germination stimulants for root parasitic plants and hyphal branching factors for arbuscular mycorrhizal fungi. On the other hand, they are also transported from the roots to the shoot where they inhibit tillering or branching. In the present study, the genetic variation in strigolactone production and tillering phenotype was studied in twenty rice varieties collected from all over the world and correlated with S. hermonthica infection. Rice cultivars like IAC 165, IAC 1246, Gangweondo and Kinko produced high amounts of the strigolactones orobanchol, 2′-epi-5-deoxystrigol and three methoxy-5-deoxystrigol isomers and displayed low amounts of tillers. These varieties induced high S. hermonthica germination, attachment, emergence as well as dry biomass. In contrast, rice cultivars such as Super Basmati, TN 1, Anakila and Agee displayed high tillering in combination with low production of the aforementioned strigolactones. These varieties induced only low S. hermonthica germination, attachment, emergence and dry biomass. Statistical analysis across all the varieties confirmed a positive correlation between strigolactone production and S. hermonthica infection and a negative relationship with tillering. These results show that genetic variation in tillering capacity is the result of genetic variation in strigolactone production and hence could be a helpful tool in selecting rice cultivars that are less susceptible to S. hermonthica infection
Proceedings Third International Workshop on Computational Models for Cell Processes
This volume contains the final versions of the papers presented at the 3rd
International Workshop on Computational Models for Cell Processes (CompMod
2011). The workshop took place on September 10, 2011 at the University of
Aachen, Germany, in conjunction with CONCUR 2011. The first edition of the
workshop (2008) took place in Turku, Finland, in conjunction with Formal
Methods 2008 and the second edition (2009) took place in Eindhoven, the
Netherlands, as well in conjunction with Formal Methods 2009. The goal of the
CompMod workshop series is to bring together researchers in Computer Science
(especially in Formal Methods) and Mathematics (both discrete and continuous),
interested in the opportunities and the challenges of Systems Biology