Photosynthetic resilience of dry-farmed 'Pedro Ximénez' grapevines under organic versus conventional management in a warm Mediterranean vineyard.

IF 4 2区农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY

Journal of the Science of Food and Agriculture Pub Date : 2026-10-01 Epub Date: 2026-06-23 DOI:10.1002/jsfa.70825

Saray Gutiérrez-Gordillo, Juan Manuel Pérez-González, Pau Sancho-Galán, Antonio Amores-Arrocha, Ana Jiménez-Cantizano

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引用次数: 0

Abstract

Background: Organic viticulture is expanding across Mediterranean wine regions, driven by EU sustainability policies and increasing consumer demand. However, comparative studies assessing both physiological performance and productivity of grapevines under organic and conventional management while maintaining similar soil and climatic conditions remain limited, particularly in dry-farmed warm Mediterranean environments. This study evaluated the physiological and agronomic responses of the grapevine cultivar 'Pedro Ximénez' over two consecutive seasons (2022-2023) in a commercial dry-farmed vineyard in south-western Spain managed under certified organic and conventional management systems.

Results: Leaf gas-exchange parameters including net photosynthetic rate (A _N), stomatal conductance (g _s), intrinsic water-use efficiency (_iWUE), and the stomatal stress integral (SI _gs) were monitored alongside agronomic parameters such as bunch number, bunch weight, and pruning weight. Across both seasons, organically managed vines showed lower cumulative stomatal stress (SI _gs reduced by 37% in 2022 and 14% in 2023) while maintaining similar seasonal iWUE values. During high vapor pressure deficit episodes, electron transport rate (ETR) remained comparable between management systems whereas A _N declined, indicating that photosynthetic reductions were mainly associated with CO₂ diffusional or biochemical limitations rather than photochemical impairment. Yield components were comparable between systems, although organic vines produced more clusters per plant in 2023 (17 ± 0.9 vs 15 ± 0.8; Tukey test, P < 0.05).

Conclusion: Under the conditions of this commercial, warm Mediterranean vineyard, organic management was associated with reduced seasonal stomatal stress while maintaining comparable productivity, suggesting that organic viticulture may represent a viable strategy for dry-farmed vineyards in warm Mediterranean regions. © 2026 Society of Chemical Industry.

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在温暖的地中海葡萄园中，有机管理与传统管理下旱作Pedro ximacimnez葡萄的光合恢复能力。

背景：受欧盟可持续发展政策和日益增长的消费者需求的推动，有机葡萄种植正在地中海葡萄酒产区扩张。然而，在保持土壤和气候条件相似的情况下，评估有机和传统管理下葡萄的生理性能和生产力的比较研究仍然有限，特别是在干燥种植的温暖地中海环境中。本研究在西班牙西南部一个采用有机认证和传统管理系统管理的商业旱作葡萄园中，评估了葡萄品种“Pedro xim涅斯”连续两个季节（2022-2023）的生理和农艺反应。结果：对叶片气体交换参数包括净光合速率（AN）、气孔导度（gs）、内在水分利用效率（iWUE）和气孔应力积分（SIgs）与农艺参数如束数、束重和修剪质量进行了监测。在这两个季节，有机管理的葡萄藤表现出较低的累积气孔压力（2022年SIgs减少37%，2023年减少14%），同时保持相似的季节性iWUE值。在高蒸汽压亏缺期间，不同管理系统之间的电子传递率（ETR）保持相当，而氮化氮（AN）下降，表明光合作用减少主要与CO 2扩散或生化限制有关，而不是光化学损害。尽管有机葡萄在2023年每株产生更多的葡萄串（17±0.9 vs 15±0.8），但不同系统之间的产量成分具有可比性（Tukey test， P）。结论：在这个商业化的温暖地中海葡萄园的条件下，有机管理与减少季节性气孔胁迫有关，同时保持相当的生产力，这表明有机葡萄栽培可能是温暖地中海地区旱作葡萄园的一种可行策略。©2026化学工业协会。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the Science of Food and Agriculture 工程技术-农业综合

CiteScore

8.10

自引率

4.90%

发文量

634

审稿时长

3.1 months

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