Strigolactones are phytohormones that influence many aspects of plant development and physiology, including stomatal movement under irrigated and drought stress conditions. Plants defective in strigolactone biosynthesis and signalling have higher stomatal conductance, especially when irrigated, and thus are worse than the wt at avoiding drought consequences. Also, treatment with the synthetic strigolactone analogue rac-GR24 decreases stomatal conductance and water loss; and tomato (Solanum lycopersicum L.) scions, in which strigolactone content in the shoot is increased by grafting on strigolactone-defective roots, also show lower stomatal conductance and better drought avoidance (our previous work). However, results obtained so far focussed on the physiological and molecular aspects influenced by strigolactones under drought stress, while no information is available on the yield of the crop, and agronomical water use efficiency. In order to investigate this issue, these parameters are being evaluated under well-watered and drought stress conditions, in self-grafted wild-type and strigolactone-depleted tomato plants. Additionally, hetero-grafted plants (wild-type scions on strigolactone-depleted rootstocks, which leads to higher strigolactones in leaves as mentioned above) and self-grafted, strigolactone-treated plants are used to investigate the potentially positive effects of a moderate excess of hormone on water use efficiency and yield.

Strigolactones influence on tomato water use efficiency under drought

Francesco Gresta;Davide Patono;Claudio Lovisolo;Andrea Schubert;Ivan Visentin;Francesca Cardinale
2019

Abstract

Strigolactones are phytohormones that influence many aspects of plant development and physiology, including stomatal movement under irrigated and drought stress conditions. Plants defective in strigolactone biosynthesis and signalling have higher stomatal conductance, especially when irrigated, and thus are worse than the wt at avoiding drought consequences. Also, treatment with the synthetic strigolactone analogue rac-GR24 decreases stomatal conductance and water loss; and tomato (Solanum lycopersicum L.) scions, in which strigolactone content in the shoot is increased by grafting on strigolactone-defective roots, also show lower stomatal conductance and better drought avoidance (our previous work). However, results obtained so far focussed on the physiological and molecular aspects influenced by strigolactones under drought stress, while no information is available on the yield of the crop, and agronomical water use efficiency. In order to investigate this issue, these parameters are being evaluated under well-watered and drought stress conditions, in self-grafted wild-type and strigolactone-depleted tomato plants. Additionally, hetero-grafted plants (wild-type scions on strigolactone-depleted rootstocks, which leads to higher strigolactones in leaves as mentioned above) and self-grafted, strigolactone-treated plants are used to investigate the potentially positive effects of a moderate excess of hormone on water use efficiency and yield.
6th International Plant Science Conference
Padua (IT)
4-6 September
6th International Plant Science Conference
1
1
Francesco Gresta, Davide Patono , Claudio Lovisolo, Andrea Schubert, Ivan Visentin, Francesca Cardinale
File in questo prodotto:
File Dimensione Formato  
Abstract WUE__SIBV1_2.doc

non disponibili

Descrizione: abstract
Tipo di file: MATERIALE NON BIBLIOGRAFICO
Dimensione 506.5 kB
Formato Microsoft Word
506.5 kB Microsoft Word   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/1811226
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact