Naslov
Influence of heat stress on chloroplast pigments and proline content in apple leaves

Autori
Ravlić, Jelena ; Lisjak, Miroslav ; Teklić, Tihana ; Rebekić, Andrijana ; Vinković, Tomislav

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

Izvornik
Proceedings of 58th Croatian & 18th International Symposium on Agriculture / Carović-Stanko, K ; Širić, I. - Zagreb : Agronomski fakultet Sveučilišta u Zagrebu, 2023, 35-41

Skup
58th Croatian & 18th International Symposium on Agriculture

Mjesto i datum
Croatia, 11.02.2023. - 17.02.2023

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
apple varieties, heat stress, osmolyte accumulation, photosynthetic pigments

Sažetak
Apple crops prefer moderate temperatures along with medium to high humidity. Dry climate and long-term high temperatures during summer can negatively affect the synthesis of chloroplast pigments in the apple leaf, which negatively affects the assimilation processes. One of the defense strategies against heat stress is the synthesis and accumulation of free proline, which is an important osmoregulator. The aim of the research was to determine the content of free proline and chloroplast pigments in the leaves of thirty-three apple varieties grown at two climatically different localities in Croatia, Tenja and Donja Zelina. The leaves were sampled after a long-term hot period, at the end of June 2021. In average for all the examined apple varieties, the location significantly influenced the content of free proline, chlorophyll a, total chlorophylls and the ratio of total chlorophylls and carotenoids. A significant influence of the variety on the accumulation of proline and the content of carotenoids was determined, which points to the genetic specificity in the response to high temperatures. Future research that will link the physiological response of apple to heat stress with the pomological properties of the fruit, should help producers in choosing varieties which are more suitable for cultivation in particular climatic conditions.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija), Biotehnologija

Napomena
Podaci prikazani u radu dio su istraživanja u
sklopu projekta "Appleresist-genetska otpornost
jabuke na toplinski i sušni stres uz formiranje
preporučenog sortimenta za proizvodna područja
kontinentalne Hrvatske” (KK.05.1.1.02.0029)"

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