Water-soaking and cracking in strawberry: Mechanism and causes

草莓浸水、开裂的机理及原因

• 批准号: 426627435
• 负责人: Professor Dr. Moritz Knoche
• 金额: --
• 依托单位: Institut für Gartenbauliche Produktionssysteme
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/426627435?language=en
• 关键词: Water; soaking; cracking; strawberry; Mechanism

Mature fruits of strawberry show very limited rainfastness. First, their wetted skins soon show signs of water-soaking and, second, this is quickly followed by a progressive disintegration of the underlying flesh tissues. Neither problem is at all reversible upon drying. Protected cultivation is the only measure currently available that reliably limits these problems but this significantly increases the cost of production. A third problem is the rapid softening of the fruit once maturity is reached – both pre- and post-harvest. These three factors dominate in the determination of fruit quality at point of sale. Here, we set out to investigate the hypothesis that all three phenomena are directly or indirectly related to fruit water relations. Our objectives are to identify the mechanistic bases of water soaking and cell rupture in the flesh. We will focus on: (1) characterising the cytology of the skins of strawberry fruit - with and without signs of rain damage, (2) determining the rate of water transport into the fruit through the stalk, (3) quantifying the rates of fruit water loss (transpiration) through the fruit surface and (4) establishing the effects of calcium and turgor on: (i) fruit firmness, (ii) cell-wall swelling, (iii) tissue fracture mode and (iv) susceptibility to rain damage. We expect to obtain the underpinning information required to understand the physiology of strawberry fruits and their quality and to determine how these are affected by fruit water relations. This information is required to develop strategies to mitigate rain damage (water soaking, flesh disintegration) and to help maintain fruit firmness via both altered production methods and fruit breeding.

草莓的成熟水果显示出非常有限的雨天。首先，他们的湿皮很快就会显示出浸水的迹象，其次，随后迅速进行了基础肉组织的进行性瓦解。干燥后，这两个问题都不可逆。受保护的种植是当前可靠地限制这些问题的唯一措施，但这大大增加了生产成本。第三个问题是一旦达到成熟度，果实的迅速软化 - 包括收获前后。这三个因素在确定销售点的水果质量方面占主导地位。在这里，我们着手研究所有三种现象与果水关系直接或间接相关的假设。我们的目标是确定果肉中浸泡和细胞破裂的机械基础。 We will focus on: (1) characterising the cytology of the skins of strawberry fruit - with and without signs of rain damage, (2) determining the rate of water transport into the fruit through the stalk, (3) quantifying the rates of fruit water loss (transpiration) through the fruit surface and (4) establishing the effects of calcium and turgor on: (i) fruit farmness, (ii) cell-wall swallowing, (iii) tissue fracture mode and （iv）降雨损伤的敏感性。我们希望获得了解草莓水果及其质量生理所需的基本信息，并确定如何影响这些水果。通过水果水关系。需要此信息来制定减轻雨水损害（浸水，肉体瓦解）的策略，并通过改变的生产方法和水果育种来帮助维持果实。