20.500.12556/RUL-144798 Response of chloroplast pigments, sugars and phenolics of sweet cherry leaves to chilling The aim of the present study was to evaluate the efect of post-fowering chilling of sweet cherry (Prunus avium L.) on the content of biochemical parameters in the leaf (chloroplast pigments, sugars and phenolics). The efect of chilling was investigated in two experiments. Potted 2-year-old trees of cv. ’Grace Star’ and ’Schneiders’ were exposed to one, two or three consecutive overnight chillings at an average air temperature of 4.7 °C (Experiment I), but in the following year only trees of ’Grace Star’ were chilled at 2.2 °C (Experiment II), 3 to 7 weeks after fowering. The analysis of the biochemical parameters was performed by high performance liquid chromatography combined with electrospray ionization mass spectrometry. Chilling at 4.7 °C caused little or no stress, while 2.2 °C induced more intense stress with increased zeaxanthin, sugar and phenolic content in leaves, while exposure of trees to higher temperatures and closer to fowering showed no changes. Two or three consecutive overnight chilling periods increased the phenolic content and enhanced the accumulation of zeaxanthin in the leaves. Sucrose, sorbitol, fructose, total sugar, and total favonoid content in leaves increased within 48 h after chilling. Zeaxanthin epoxidized within 24 h after one and 48 h after one and two consecutive overnight chillings. abiotic biochemistry carbohydrates metabolism monosaccharides physiology plant physiology plant sciences plant stress responses secondary metabolism sugar alcohols sadjarstvo češnja Prunus avium kemična sestava sladkorji sekundarni metaboliti hlajenje nizke temperature fiziologija rastlin hladni stres true false true Angleški jezik Slovenski jezik Članek v reviji 2023-03-13 14:23:30 2023-03-13 14:23:31 2023-03-14 09:40:57 0000-00-00 00:00:00 2021 0 0 13 str. art. 7210 Vol. 11 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 634.1/.7 2045-2322 10.1038/s41598-021-86732-y 57978627 s41598-021-86732-y_(1).pdf s41598-021-86732-y_(1).pdf 1 1764A74BBD482C2E2D79C3471D9DF150 f5519d8655f4aaa26f00442bfc524d5584a746c39e069b9b955fa3d04e42349e 8d991265-c1a2-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=167317 https://www.nature.com/articles/s41598-021-86732-y 0 e238a701-c243-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=167337 Biotehniška fakulteta 0 0 0