Dinis Lia-Tânia, Jesus Cláudia, Amaral Joana, Gómez-Cadenas Aurelio, Correia Barbara, Alves Artur, Pinto Glória
Department of Agronomy & CITAB-Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes e Alto Douro (UTAD), Apt. 1013, 5000-801 Vila Real, Portugal.
Centre for Environmental and Marine Studies (CESAM), Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
Plants (Basel). 2022 Jul 28;11(15):1961. doi: 10.3390/plants11151961.
Diseases and climate change are major factors limiting grape productivity and fruit marketability. is a fungus of the family Botryosphaeriaceae that causes Botryosphaeria dieback of grapevine worldwide. Abiotic stress may change host vitality and impact susceptibility to the pathogen and/or change the pathogen's life cycle. However, the interaction between both stress drivers is poorly understood for woody plants. We addressed the hypothesis that distinct morpho-physiological and biochemical responses are induced in grapevine ()- interactions depending on when water deficits are imposed. Grapevines were submitted to water deficit either before or after fungus inoculation. Water deficit led to the reduction of the net photosynthetic rate, stomatal conductance, and transpiration rate, and increased the abscisic acid concentration regardless of fungal inoculation. inoculation before water deficit reduced plant survival by 50% and resulted in the accumulation of jasmonic acid and reductions in malondialdehyde levels. Conversely, grapevines inoculated after water deficit showed an increase in proline and malondialdehyde content and all plants survived. Overall, grapevines responded differently to the primary stress encountered, with consequences in their physiological responses. This study reinforces the importance of exploring the complex water deficit timing × disease interaction and the underlying physiological responses involved in grapevine performance.
疾病和气候变化是限制葡萄产量和果实适销性的主要因素。是葡萄座腔菌科的一种真菌，在全球范围内导致葡萄藤葡萄座腔菌溃疡病。非生物胁迫可能会改变宿主活力，影响对病原体的易感性和/或改变病原体的生命周期。然而，对于木本植物来说，这两种胁迫驱动因素之间的相互作用却知之甚少。我们探讨了这样一个假设，即根据水分亏缺施加的时间不同，葡萄（）-相互作用中会诱导出不同的形态生理和生化反应。葡萄在接种真菌之前或之后遭受水分亏缺。无论是否接种真菌，水分亏缺都会导致净光合速率、气孔导度和蒸腾速率降低，并增加脱落酸浓度。在水分亏缺前接种会使植物存活率降低50%，并导致茉莉酸积累和丙二醛水平降低。相反，在水分亏缺后接种的葡萄脯氨酸和丙二醛含量增加，所有植株都存活了下来。总体而言，葡萄对所遇到的主要胁迫反应不同，这对其生理反应产生了影响。这项研究强化了探索水分亏缺时间×病害复杂相互作用以及葡萄性能所涉及的潜在生理反应的重要性。
