Bahr Christopher, Schmidt Dominik, Kahlen Katrin
Department of Modeling and Systems Analysis, Hochschule Geisenheim University, Geisenheim, Germany.
Front Plant Sci. 2021 Oct 12;12:715906. doi: 10.3389/fpls.2021.715906. eCollection 2021.
Sunburn in grapevine berries is known as a recurring disorder causing severe yield losses and a decline in berry quality. The transition from healthy to sunburnt along a temporal trajectory is not fully understood. It is driven by light-boosted local heat impact and modulated by, e.g., past environments of the berry and its developmental state. Events of berry sunburn are often associated with heatwaves, indicating a link to climate change. In addition, the sensitivity of grapevine architecture to changing environmental condition indicates an urgent need to investigate and adapt mitigation strategies of berry sunburn in future vineyards. In this perspective, we want to identify missing links in predicting berry sunburn in vineyards and propose a modeling framework that may help us to investigate berry sunburn in future vineyards. For this, we propose to address open issues in both developing a model of berry sunburn and considering dynamic canopy growth, and canopy interaction with the environment and plant management such as shoot positioning or leaf removal. Because local environmental conditions drive sunburn, we aim at showing that identifying sunburn-reducing strategies in a vineyard under future environmental conditions can be supported by a modeling approach that integrates effects of management practices over time and takes grapevine architecture explicitly into account. We argue that functional-structural plant models may address such complex tasks. Once open issues are solved, they might be a promising tool to advance our knowledge on reducing risks of berry sunburn .
葡萄浆果日灼是一种反复出现的病害，会导致严重的产量损失和浆果品质下降。沿时间轨迹从健康状态转变为日灼状态的过程尚未完全明晰。它是由光照增强导致的局部热影响驱动的，并受到例如浆果过去的环境及其发育状态等因素的调节。浆果日灼事件通常与热浪有关，这表明其与气候变化存在关联。此外，葡萄树结构对不断变化的环境条件的敏感性表明，迫切需要研究并调整未来葡萄园浆果日灼的缓解策略。从这个角度来看，我们希望找出葡萄园浆果日灼预测中缺失的环节，并提出一个建模框架，以帮助我们在未来的葡萄园中研究浆果日灼。为此，我们建议解决在建立浆果日灼模型以及考虑树冠动态生长、树冠与环境的相互作用以及诸如新梢定位或摘叶等植株管理方面的未解决问题。由于局部环境条件会引发日灼，我们旨在表明，在未来环境条件下的葡萄园中，通过一种整合管理措施随时间的影响并明确考虑葡萄树结构的建模方法，可以支持确定减少日灼的策略。我们认为功能 - 结构植物模型可以解决此类复杂任务。一旦解决了这些未解决问题，它们可能成为增进我们对降低浆果日灼风险的认识的有前景的工具。
