@conference{
author = "Golob, Aleksandra and Ojdanič, Nik and Živanović, Bojana and Germ, Mateja and Milić Komić, Sonja and Sedlarević Zorić, Ana and Milić, Dejana and Pantelić, Ana and Mavrič Čermelj, Anja and Samardžić, Jelena and Veljović-Jovanović, Sonja and Vidović, Marija",
year = "2022",
abstract = "Drought causes huge agricultural and economic losses worldwide. Silicon (Si) is considered a
beneficial element for plants. It mitigates stress caused by salinity, drought, and high and low temperatures
by promoting antioxidant production. However, the underlying mechanisms are still not
elucidated. We investigated Si fertilisation effect on photosynthetic parameters, trichome number,
leaf optical properties, as well as profiles of amino acids and polyphenols in barley exposed to
water shortage. Silicon was applied in three growth stages: (i) before the flag leaf emergence;
(ii) prior to the grain filling phase; (iii) at the grain filling phase start. Drought negatively impacts
photochemical efficiency, stomatal conductance, photosynthetic pigment content, and leaf reflective
and transmissive properties. Si application between flag leaf emergence and grain filling
had the strongest effect on light reflectance. Among all analyzed phenolics, saponarin was the
most abundant in all samples, irrespective of water regime and Si supply. Caffeoyl ester was the
only hydroxycinnamic acid showing significant accumulation with the latest applied Si compared
to no added Si upon drought. The major amino acids in barley leaves were glutamate, glutamine,
aspartate, asparagine, and serine. Aspartate content was the highest in leaves exposed to drought
without Si addition, while lysine was the most accumulated in the leaves supplemented by Si at
the grain filling phase start. Proline was 2.5 times more abundant in the leaves exposed to drought
regardless of Si treatment. Taken together, although Si did not mitigate drought stress effects, its
effect was dependent on the barley growth phase prior to supplementation.",
publisher = "Serbian Plant Physiology Society, Institute for Biological Research “Siniša Stanković” – National Institute of Republic of Serbia, University of Belgrade, Faculty of Biology, University of Belgrade",
journal = "Book of Abstracts / 4th International Conference on Plant Biology [and] 23rd SPPS Meeting, 6-8 October 2022, Belgrade",
title = "The usage of silicon fertilisation in order to mitigate the oxidative stress and to improve the resilience of barley subjected to drought",
pages = "67",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1872"
}
