Physiological and biochemical responses of 'Divadona' peach on Rootpac 20 and Rootpac 40 under drought and heat stress adaptation and its recovery mechanisms.

IF 5.4 2区 生物学 Q1 PLANT SCIENCES
Meral Dogan, Ibrahim Bolat, Metin Turan, Ozkan Kaya
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Abstract

Climate change-induced drought and heat stress pose significant challenges to global peach production, threatening agricultural sustainability and food security. This study, therefore, investigated the morphological, physiological and biochemical responses of the 'Divadona'peach cultivar grafted onto two different rootstocks (Rootpac 20 and Rootpac 40) under drought stress, heat shock, and their combination. We aimed to identify superior rootstock performances and understand stress tolerance mechanisms for improved cultivation strategies. Our findings revealed that combined stress induced the most severe impacts, with Rootpac 40 demonstrating superior stress tolerance. Under combined stresses, relative shoot diameter decreased less in Rootpac 40/'Divadona' (19.75%) compared to Rootpac 20/'Divadona', while relative shoot length showed similar patterns. Antioxidant enzyme activities increased significantly, with POD showing the highest elevation in Rootpac 40/'Divadona' compared to Rootpac 20/'Divadona. Stress markers exhibited substantial accumulation, with MDA content rising more in Rootpac 20/'Divadona' than in Rootpac 40/'Divadona'. Nutrient analysis showed that Rootpac 40/'Divadona' maintained higher levels of essential nutrients under stress, with nitrogen content declining less compared to Rootpac 20/'Divadona'. The study demonstrated that Rootpac 40/'Divadona' possesses superior stress tolerance mechanisms through better maintenance of growth parameters, enhanced antioxidant defense systems, and improved nutrient retention capacity. These findings provide valuable insights for fruit growing, enabling informed rootstock selection for peach cultivation in drought-prone regions, ultimately contributing to more resilient and sustainable fruit production systems under changing climatic conditions.

旱热胁迫下‘Divadona’桃对Rootpac 20和Rootpac 40的生理生化响应及其恢复机制
气候变化引起的干旱和热胁迫对全球桃子生产构成重大挑战,威胁农业可持续性和粮食安全。本研究研究了嫁接到不同砧木(Rootpac 20和Rootpac 40)上的‘Divadona’桃品种在干旱胁迫、热休克及其组合胁迫下的形态、生理和生化反应。我们的目的是找出优良的砧木性能,了解抗逆性机制,以改进栽培策略。我们的研究结果显示,综合应激诱导了最严重的影响,Rootpac 40表现出更强的耐受性。在综合胁迫下,Rootpac 40/'Divadona‘的相对茎粗比Rootpac 20/’Divadona减少了19.75%,而相对茎长也表现出相似的变化规律。抗氧化酶活性显著增加,其中,与Rootpac 20/'Divadona相比,Rootpac 40/'Divadona的POD含量最高。胁迫标记表现出明显的积累,Rootpac 20/‘Divadona‘的MDA含量高于Rootpac 40/’Divadona’。营养分析表明,Rootpac 40/‘Divadona‘在胁迫下保持了较高的必需营养素水平,氮含量下降幅度小于Rootpac 20/’Divadona’。研究表明,Rootpac 40/'Divadona'通过更好地维持生长参数、增强抗氧化防御系统和提高营养物质保留能力,具有优越的耐胁迫机制。这些发现为果树生长提供了有价值的见解,使干旱易发地区的桃种植能够明智地选择砧木,最终有助于在不断变化的气候条件下建立更具弹性和可持续的水果生产系统。
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来源期刊
Physiologia plantarum
Physiologia plantarum 生物-植物科学
CiteScore
11.00
自引率
3.10%
发文量
224
审稿时长
3.9 months
期刊介绍: Physiologia Plantarum is an international journal committed to publishing the best full-length original research papers that advance our understanding of primary mechanisms of plant development, growth and productivity as well as plant interactions with the biotic and abiotic environment. All organisational levels of experimental plant biology – from molecular and cell biology, biochemistry and biophysics to ecophysiology and global change biology – fall within the scope of the journal. The content is distributed between 5 main subject areas supervised by Subject Editors specialised in the respective domain: (1) biochemistry and metabolism, (2) ecophysiology, stress and adaptation, (3) uptake, transport and assimilation, (4) development, growth and differentiation, (5) photobiology and photosynthesis.
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