Arun K. Sharma

Friday Seminar by Ms. Soma Ghosh


 

        Notice
 
        Speaker      :    Ms Soma Ghosh  
 
        Topic           :  "Cell-to-cell communication in wound
                                induced Ca2+ signalling".
 
        Date &         :    March 25, 2022
        Time                 3.30 pm via online mode

 

 

 

 

 

Kindly make it convenient to attend.

 

Category: Research
Posted by: bedineel

Cell-to-Cell communication in wound induced Ca2+ signaling

Soma Ghosh

 

Organ to organ electrical signaling is highly conserved feature in land plants. Wound stress is responsible for generation of “Slow wave potentials” (SWPs) which is characterized by massive and rapid depolarization of membrane followed by its instant and slow repolarization. Depolarization of membrane further stimulates production of potent lipidic molecule known as jasmonate (JA) or JA-precursor at the distal leaf or away from the local infection. JA or JA-precursors are the key components of defense against wound stress in plants. Electrical signaling is very common in the plant such as Mimosa pudica. However what is the spatial temporal relation between electrical and calcium (Ca2+) signaling has not been discovered in any plant. Recently, Nguyen et al., (2018) has shown that wound induced electrical signaling generates Ca2+ fluxes which further initiate downstream signaling cascade. Clade 3 glutamate receptor-like proteins especially GLR3.1, GLR3.3 and GLR3.6 are involved in this process. Later on, Kumari et al., (2019) reported that Arabidopsis H+-ATPase AHA1 acts downstream of GLR3.3 and participates in SWPs via negatively regulating herbivore attack or wound stress in plants. Together these reports demonstrated that like animals, plants have also developed organ-to-organ electrical signaling with the involvement of Ca2+ signaling in order to fight against wound stress in plants.
References
Nguyen CT, Kurenda A, Stolz S, Chételat A, Farmer EE. Identification of cell populations necessary for leaf-to-leaf electrical signaling in a wounded plant. Proceedings of the National Academy of Sciences. 2018 Oct 2;115(40):10178-83.
 
Kumari A, Chételat A, Nguyen CT, Farmer EE. Arabidopsis H+-ATPase AHA1 controls slow wave potential duration and wound-response jasmonate pathway activation. Proceedings of the National Academy of Sciences. 2019 Oct 1;116(40):20226-31.