Enhancing sweet cherry resilience to spring frost and rain-induced cracking with pre-harvest melatonin treatments

IF 5.4 Q1 PLANT SCIENCES
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引用次数: 0

Abstract

Sweet cherry producers annually confront climatic challenges such as spring frost and fruit cracking. This vulnerability arises primarily from spring frost during bloom or cracking at critical maturity stages during persistent rainfall. With changing climate patterns, innovative strategies are essential to mitigate these adversities. Foliar applications of melatonin (MT) at 0, 0.01, 0.05 and 0.1 mM were tested on the ‘Prime Giant’ and ‘Sweetheart’ cultivars over four different production cycles (2020–2023) to evaluate the effect on frost resilience on flower buds and fruit cracking reduction. MT-treated flower buds showed reduced malondialdehyde content and increased fruit set in most seasons, reducing their vulnerability to extreme weather events. In addition, MT consistently decreased sweet cherry cracking incidence across all studied seasons, indicating a strong effect between the fruit ripening stage and susceptibility to fruit cracking, which was cultivar dependent. Quality parameters at harvest, including fruit firmness, and colour at harvest, were either delayed or unaffected in MT-treated fruits compared with controls. However, other ripening parameters were stimulated by pre-harvest MT applications in several growing cycles, such as total soluble solids, which slightly reduced total acidity in MT-treated fruits. In summary, pre-harvest MT treatments can be a promising strategy for climate change adaptation and stress mitigation, potentially increasing sweet cherry production under extreme weather conditions.
通过采收前褪黑激素处理增强甜樱桃对春季霜冻和雨水引起的裂果的抗逆性
甜樱桃生产者每年都要面对春季霜冻和果实开裂等气候挑战。这种脆弱性主要源于开花期的春季霜冻或关键成熟期持续降雨造成的裂果。随着气候模式的不断变化,必须采取创新策略来缓解这些不利因素。在四个不同的生产周期(2020-2023 年)内,对'Prime Giant'和'Sweetheart'栽培品种叶面喷施 0、0.01、0.05 和 0.1 毫摩尔的褪黑激素(MT)进行了测试,以评估其对花蕾抗霜冻能力和减少果实开裂的影响。经 MT 处理的花蕾在大多数季节都能降低丙二醛含量并提高坐果率,从而降低其对极端天气事件的脆弱性。此外,在所有研究季节中,MT 始终能降低甜樱桃的裂果率,这表明果实成熟阶段与果实裂果易感性之间存在很强的影响,而果实裂果与栽培品种有关。与对照组相比,经 MT 处理的果实在收获时的质量参数,包括果实硬度和颜色,要么推迟,要么不受影响。不过,在几个生长周期中,采收前施用 MT 对其他成熟参数有促进作用,例如总可溶性固形物,经 MT 处理的水果总酸度略有降低。总之,采前 MT 处理是适应气候变化和缓解压力的一种有前途的策略,有可能在极端天气条件下提高甜樱桃的产量。
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来源期刊
Current Plant Biology
Current Plant Biology Agricultural and Biological Sciences-Plant Science
CiteScore
10.90
自引率
1.90%
发文量
32
审稿时长
50 days
期刊介绍: Current Plant Biology aims to acknowledge and encourage interdisciplinary research in fundamental plant sciences with scope to address crop improvement, biodiversity, nutrition and human health. It publishes review articles, original research papers, method papers and short articles in plant research fields, such as systems biology, cell biology, genetics, epigenetics, mathematical modeling, signal transduction, plant-microbe interactions, synthetic biology, developmental biology, biochemistry, molecular biology, physiology, biotechnologies, bioinformatics and plant genomic resources.
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