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Durum Wheat at Risk in a Climate Change Scenario: The Carotenoid Content is Affected by Short Heat Waves
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2024-09-05 , DOI: 10.1021/acs.jafc.4c05718 María Dolores Requena-Ramírez 1 , Cristina Rodríguez-Suárez 1 , Dámaso Hornero-Méndez 2 , Sergio G Atienza 1
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2024-09-05 , DOI: 10.1021/acs.jafc.4c05718 María Dolores Requena-Ramírez 1 , Cristina Rodríguez-Suárez 1 , Dámaso Hornero-Méndez 2 , Sergio G Atienza 1
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Short heat waves (SHW), defined as periods of several consecutive days with high temperatures above the developmental optimum, will become more frequent due to climate change. The impact of SHW on yield and yield-related parameters has received considerable interest, but their effects on grain quality remain poorly understood. We employed a simulation approach to investigate the impact of SHW on durum wheat quality over a 7 day period, starting 1 week after anthesis. During the SHW treatment, carried out using portable polyethylene tents, the temperature in the treated plots increased by 10–15 °C during daily hours. The SHW treatment reduced the number of grains per spike, thousand kernel weight, and total carotenoid content in grains in stressed plants in comparison to control plants. However, no differences in the protein content or percentage of vitreous grains were observed. The behavior of individual carotenoids in response to SHW appears to differ, suggesting a differential change in the balance between β,ε- and β,β-branches of the carotenoid biosynthetic pathway as a consequence of SHW-induced stress. The present study highlights the importance of developing efficient breeding strategies for reduced sensitivities to heat stress. Such strategies should not only prioritize yield but also encompass grain quality.
中文翻译：
气候变化情景下的硬粒小麦面临风险：类胡萝卜素含量受到短暂热浪的影响
短热浪（SHW）被定义为连续几天高温高于发育最佳温度的时期，由于气候变化，短热浪将变得更加频繁。 SHW 对产量和产量相关参数的影响引起了人们极大的兴趣，但它们对谷物质量的影响仍然知之甚少。我们采用模拟方法来研究 SHW 在 7 天内（从花期后 1 周开始）对硬粒小麦品质的影响。在使用便携式聚乙烯帐篷进行 SHW 处理期间，处理过的地块的温度每天都会升高 10-15 °C。与对照植物相比，SHW 处理降低了胁迫植物的每穗粒数、千粒重和粒中总类胡萝卜素含量。然而，没有观察到蛋白质含量或玻璃粒百分比的差异。各个类胡萝卜素对 SHW 的反应似乎有所不同，这表明由于 SHW 诱导的应激，类胡萝卜素生物合成途径的 β,ε- 和 β,β- 分支之间的平衡发生了差异变化。本研究强调了制定有效育种策略以降低对热应激敏感性的重要性。这些战略不仅应优先考虑产量，还应涵盖谷物质量。
更新日期：2024-09-05
中文翻译：
气候变化情景下的硬粒小麦面临风险：类胡萝卜素含量受到短暂热浪的影响
短热浪（SHW）被定义为连续几天高温高于发育最佳温度的时期，由于气候变化，短热浪将变得更加频繁。 SHW 对产量和产量相关参数的影响引起了人们极大的兴趣，但它们对谷物质量的影响仍然知之甚少。我们采用模拟方法来研究 SHW 在 7 天内（从花期后 1 周开始）对硬粒小麦品质的影响。在使用便携式聚乙烯帐篷进行 SHW 处理期间，处理过的地块的温度每天都会升高 10-15 °C。与对照植物相比，SHW 处理降低了胁迫植物的每穗粒数、千粒重和粒中总类胡萝卜素含量。然而，没有观察到蛋白质含量或玻璃粒百分比的差异。各个类胡萝卜素对 SHW 的反应似乎有所不同，这表明由于 SHW 诱导的应激，类胡萝卜素生物合成途径的 β,ε- 和 β,β- 分支之间的平衡发生了差异变化。本研究强调了制定有效育种策略以降低对热应激敏感性的重要性。这些战略不仅应优先考虑产量，还应涵盖谷物质量。
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