Naslov
High temperatures during initiation of radiate pine somatic embryogenesis determine the hormonal profile of embryonal masses and the subsequent drought tolerance of somatic plants

Autori
Castander-Olarieta, Ander ; Moncaleán, Paloma ; Pereira, Catia ; Amakorová Petra ; Pěnčík, Aleš ; Petřík, Ivan ; Pavlović, Iva ; Novák, Ondřej ; Strnad, Miroslav ; Goicoa, Tomas ; Ugarte, Maria Dolores ; Montalbán, Itziar Aurora

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
The 23rd International Conference on Plant Growth Substances, Abstract book / - , 2019

Skup
23rd International Conference on Plant Growth Substances

Mjesto i datum
Pariz, Francuska, 25.06.2019. - 29.06.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
somatic embryogenesis, radiata pine, high temperature stress, phytohormones

Sažetak
Propagation via somatic embryogenesis is an effective method to produce elite plants and can be applied as a valuable tool to study the response of plants to different abiotic stresses at physiological and biochemical levels. Some studies suggest that environmental changes during embryogenesis could have long- lasting effects that could presumably determine future plant behavior. Moreover, in the last years our research team has concluded that the physical and chemical conditions during somatic embryogenesis determine the protein, hormone and metabolite profiles, as well as the micromorphological and ultrastructural organization of embryonal masses and somatic embryos. In this sense, phytohormones are known to play essential roles not only during all stages of somatic embryogenesis, but also during numerous stress-adaptation responses. In this work we have applied high temperatures (30ºC, 40ºC, 50ºC and 60ºC) for different incubation periods during initiation of radiata pine somatic embryogenesis and we have analysed the hormonal profiles of the resulting embryonal masses. Subsequently, somatic plants growing in the greenhouse, coming from those treatments, have been subjected to a drought stress period and several physiological traits have been evaluated (survival, growth, water potential, photosynthesis, stomatal conductance, transpiration and water use efficiency). Results indicate that thermal stress led to different hormonal profiles of the embryonal masses, which could be correlated with several differences observed months later at plant level (photosynthetic activity, water use efficiency, etc.).

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA