W dniu 29 czerwca b.r.  na Wydziale Biochemii, Biofizyki i Biotechnologii UJ, ul. Gronostajowa 7.Krakowski odbył się wykład: "Adaptation mechanism of plants to freezing stress – from the viewpoint of cell wall" , który wygłosił: Dr Daisuke Takahashi z Graduate School of Science and Engineering, Saitama University, Saitama, Japonia.

Dr Daisuke Takahashi bada wpływ czynników środowiskowych na tworzenie biomasy roślinnej. Na wykładzie zaprezentuje wyniki badań nad wpływem chłodu na zmiany w budowie roślinnej ściany komórkowej oraz rolę tych zmian w przystosowaniu roślin do niskich temperatur.  

Spotkanie poprowadził dr Jan Łyczakowski z Zakładu Biotechnologii Roślin, WBBiB UJ.  

Talk abstract:  

Freezing stress in plants is accompanied by a change in state of water from liquid to ice and is a complex stress that involves dehydration, mechanical stimulation, and hyperosmotic stress in addition to unfavorable chilling stress. The primary site of freezing injury is disruption of the integrity of the plasma membrane due to extracellular (apoplastic) ice formation and, therefore, the extent of freeze-induced dehydration is thought to be greatly influenced by cell wall properties.  

To adapt to such severe stress, temperate plants improve their freezing tolerance when exposed to non-freezing low temperatures; a process known as cold acclimation. Cold acclimation induces several transcription factors that regulate a number of cellular responses, including modification of membrane lipids and accumulation of soluble sugars to protect the plasma membrane from extracellular freezing. In addition to the above changes, it has recently become clear that cell walls also change during the cold acclimation process. In this seminar, we would like to discuss how the composition and properties of the cell wall change during the cold acclimation process and affect the plant survival under freezing temperature.