Numero 168

Cari socie e soci,

continuiamo con l’ultimo appuntamento dei nostri VIRTUAL CLUB SIBV prima della pausa estiva.

Il quarto seminario si svolgerà il 28 luglio 2022 dalle ore 17:00 alle ore 18:00 e sarà svolto dalla Dott.ssa Martina Tomasella dell’Università degli Studi di Trieste.

The possible role of non-structural carbohydrates in the regulation of plant hydraulics

Under ongoing climate changes, xylem embolism has been recognized as a major and ubiquitous cause of drought-induced tree mortality worldwide. In this framework, non-structural carbohydrates (NSCs) depletion has been frequently observed in concomitance with hydraulic failure. However, conclusive evidence of the role of NSCs in the regulation of plant hydraulics under fluctuating water availability is still lacking. In this seminar, an overview of possible functions of NSCs in plant hydraulic resistance-resilience to drought will be given, providing some experimental approaches applied in the last years on potted trees. In a study conducted on Populus nigra saplings, shade-induced stem NSC (mainly starch) depletion was accompanied by an increase in xylem hydraulic vulnerability to drought that, however, was not determined by xylem conduit and pit anatomical changes. Moreover, shading impeded xylem sap acidification and sugar accumulation during drought and, when plants were re-irrigated, prevented short-term hydraulic recovery, which was observed, instead, in control (with higher NSC contents) plants. Our studies highlight the importance of stem NSCs to sustain xylem hydraulic functioning during drought and suggest that adequate stem NSC thresholds may be required to trigger xylem sap chemical changes involved in embolism recovery.

Puoi partecipare all’evento telematico cliccando su questo link (link inviato via email)

Ciascuna sessione dei Virtual Club sarà svolta attraverso l’uso della Piattaforma Microsoft Teams.

Informazioni relative alle prossime sessioni sono presenti sul sito (clicca qui)

Per ulteriori informazioni non esitate a contattarci inviandoci una e-mail all’indirizzo segretario@sibv.eu

Ci auguriamo ed auspichiamo una grande partecipazione tra i soci ed interazione con gli speaker al fine di rendere questi momenti di incontro virtuale una preziosa occasione per la crescita della nostra comunità,

Un caro saluto

Il Presidente, Laura De Gara                                                                  Il Segretario, Sara Cimini

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Dear SIBV members and associates,

we are ready for the fourth seminar of our VIRTUAL CLUB SIBV.

The seminar will take place on July 28, 2022 from 17:00 to 18:00 and will be held by Dott. Martina Tomasella of the University of Trieste.

The possible role of non-structural carbohydrates in the regulation of plant hydraulics

Under ongoing climate changes, xylem embolism has been recognized as a major and ubiquitous cause of drought-induced tree mortality worldwide. In this framework, non-structural carbohydrates (NSCs) depletion has been frequently observed in concomitance with hydraulic failure. However, conclusive evidence of the role of NSCs in the regulation of plant hydraulics under fluctuating water availability is still lacking. In this seminar, an overview of possible functions of NSCs in plant hydraulic resistance-resilience to drought will be given, providing some experimental approaches applied in the last years on potted trees. In a study conducted on Populus nigra saplings, shade-induced stem NSC (mainly starch) depletion was accompanied by an increase in xylem hydraulic vulnerability to drought that, however, was not determined by xylem conduit and pit anatomical changes. Moreover, shading impeded xylem sap acidification and sugar accumulation during drought and, when plants were re-irrigated, prevented short-term hydraulic recovery, which was observed, instead, in control (with higher NSC contents) plants. Our studies highlight the importance of stem NSCs to sustain xylem hydraulic functioning during drought and suggest that adequate stem NSC thresholds may be required to trigger xylem sap chemical changes involved in embolism recovery.

You can participate in the online event using this link (link sent via email)

Each Virtual Club session will be held via Microsoft Teams.

Information on upcoming sessions can be found on the SIBV website (click here)

For more information, do not hesitate to contact us by sending an e-mail to segretario@sibv.eu

We hope for great participation among the members and interaction with the speakers in order to make these moments of virtual meeting a precious opportunity for the growth of our community,

Warm greetings

Il Presidente, Laura De Gara                                                      Il Segretario, Sara Cimini