Naslov
Utjecaj kadmija i suše na fotosintetsku učinkovitost u kukuruzu
(The effect of cadmium and water stress on photosynthetic performance in maize)

Autori
Mlinarić, Selma ; Franić, Mario ; Galić, Vlatko ; Antunović Dunić, Jasenka ; Begović, Lidija ; Šimić, Domagoj ; Cesar, Vera

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

Izvornik
Proceedings of 53rd Croatian and 13th International Symposium On Agriculture / Rozman, Vlatka ; Antunović, Zvonko - Osijek : Fakultet agrobiotehničkih znanosti Sveučilišta Josipa Jurja Strossmayera u Osijeku, 2018, 103-104

Skup
53. hrvatski i 13. međunarodni simpozij agronoma

Mjesto i datum
Vodice, Hrvatska, 18.02.2018. - 23.02.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
fluorescencija klorofila a, JIP-test, PItotal, L-korak, K-korak
(chlorophyll a fluorescence, JIP-test, PItotal, L-band, K-band)

Sažetak
Cadmium (Cd) toxicity in soil and water deficit are causing serious problems in natural and agricultural ecosystems. The aim of this study was to investigate the influence of Cd and/or drought on photosynthetic performance of maize. Two maize lines (B84 and Os6-2) as well as their hybrid (B84xOs6-2) were subjected to Cd- induced stress (Cd), drought (D) and combined stress (Cd+D). To evaluate photosynthetic performance, chlorophyll a fluorescence was measured. Total performance index (PItot) is the most sensitive parameter of JIP-test that includes functional activity of photosystem II (PSII), photosystem I and intersystem electron transport chain. The line Os6-2 showed significant decline of PItot subjected to D and Cd+D treatments. In addition, both treatments showed positive L and Kbands, indicating lower PSII stability and destabilization of oxygen evolving center of PSII, respectively. The PItot in the line B84 declined only at D treatment with parallel increase in L-band and positive inflection of K-band. The hybrid showed decrease of PItot at Cd+D treatment with corresponding positive L and K- bands. Decline of the PItot parameter indicated that drought is the main reason for photoinhibition in Os6-2 and B84 lines. Photoinhibition due to the combination of Cd and drought occurred in hybrid and also in line B84. Our results suggested that both investigated maize lines and their hybrid have different strategies to cope with Cd-induced stress and/or drought.

Izvorni jezik
Hrvatski

Znanstvena područja
Biologija, Poljoprivreda (agronomija)

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