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Exploring the effects of red light night break on the defence mechanisms of tomato against fungal pathogen Botrytis cinerea

Kukri, András and Czékus, Zalán and Gallé, Ágnes and Nagy, Gábor and Zsindely, Nóra and Bodai, László and Galgóczi, László Norbert and Hamow, Kamirán Áron and Szalai, Gabriella and Ördög, Attila and Poór, Péter (2024) Exploring the effects of red light night break on the defence mechanisms of tomato against fungal pathogen Botrytis cinerea. PHYSIOLOGIA PLANTARUM, 176 (4). No.-e14504. ISSN 0031-9317

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Abstract

Plant infections caused by fungi lead to significant crop losses worldwide every year. This study aims to better understand the plant defence mechanisms regulated by red light, in particular, the effects of red light at night when most phytopathogens are highly infectious. Our results showed that superoxide production significantly increased immediately after red light exposure and, together with hydrogen peroxide levels, was highest at dawn after 30 min of nocturnal red‐light treatment. In parallel, red‐light‐induced expression and increased the activities of several antioxidant enzymes. The nocturnal red light did not affect salicylic acid but increased jasmonic acid levels immediately after illumination, whereas abscisic acid levels increased 3 h after nocturnal red‐light exposure at dawn. Based on the RNAseq data, red light immediately increased the transcription of several chloroplastic chlorophyll a‐b binding protein and circadian rhythm‐related genes, such as Constans 1 , CONSTANS interacting protein 1 and zinc finger protein CONSTANS‐LIKE 10. In addition, the levels of several transcription factors were also increased after red light exposure, such as the DOF zinc finger protein and a MYB transcription factor involved in the regulation of circadian rhythms and defence responses in tomato. In addition to identifying these key transcription factors in tomato, the application of red light at night for one week not only reactivated key antioxidant enzymes at the gene and enzyme activity level at dawn but also contributed to a more efficient and successful defence against Botrytis cinerea infection.

Item Type: Article
Subjects: S Agriculture / mezőgazdaság > SB Plant culture / növénytermesztés > SB975 Plant protection / növényvédelem
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 23 Sep 2024 06:54
Last Modified: 23 Sep 2024 06:54
URI: https://real.mtak.hu/id/eprint/205507

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