Stem starch reserves studied by on-solid reactions coupled with reflectance detections in water stressed grapevines

L. Rustioni, J. C. Herrera, O. Failla, E. Peterlunger, P. Sivilotti
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引用次数: 3

Abstract

Wine grape is usually grown under water deficit conditions that could negatively impact plant reserves, including the organic carbon storage in perennial organs such as woody stems. Assessing the carbohydrate status in woody organs is therefore of interest as it can influence vegetative growth in the successive season. In this study, we aimed to apply an on-solid colour reaction (using Lugol's iodine solution) coupled with reflectance spectroscopy detection to assess the grapevine canes' starch accumulation in response to short drought periods. We used two Vitis vinifera cultivars ('Cabernet Sauvignon' and 'Syrah') that were subjected to three different water conditions (well-watered; early water stress; late water stress) during the growing season as case study. We sampled woody stem tissue during winter rest. The results showed that water stress reduced the starch storage in 'Syrah', especially when imposed late and recovery time was not enough for carbon restoration, while 'Cabernet Sauvignon' was not affected. The results showed that the sensitivity of the method used here is adequate to assess starch accumulation differences due to drought treatments in grapevine canes. Moreover, the analytical approach appears fast, low cost, and promising for future physiological and agronomical research applications.
用非固相反应和反射率检测在缺水葡萄中研究茎淀粉储备
酿酒葡萄通常在缺水条件下生长,这可能会对植物储备产生负面影响,包括多年生器官(如木本茎)的有机碳储量。因此,评估木本器官中的碳水化合物状态是有意义的,因为它可以影响连续季节的营养生长。在这项研究中,我们旨在应用非固体显色反应(使用Lugol's碘溶液)结合反射光谱检测来评估葡萄藤在短干旱时期的淀粉积累。我们使用了两种葡萄品种(赤霞珠(Cabernet Sauvignon)和西拉(Syrah)),它们经受了三种不同的水分条件(水分充足;早期水分胁迫;以生长季节后期水分胁迫为例进行研究。我们在冬季休息期间取样木质茎组织。结果表明,水分胁迫降低了“西拉”的淀粉储存,尤其是施加较晚且恢复时间不足以恢复碳的情况下,而“赤霞珠”则不受影响。结果表明,该方法的灵敏度足以评估干旱处理对葡萄藤淀粉积累的影响。此外,这种分析方法速度快、成本低,在未来的生理和农学研究中具有广阔的应用前景。
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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