Russeting in ‘Apple Mango’: Causes, consequences and management

“苹果芒果”中的赤褐色：原因、后果和管理

• 批准号: 448601884
• 负责人: Professor Dr. Moritz Knoche
• 金额: --
• 依托单位: Jomo Kenyatta University of Agriculture & Technology
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/448601884?language=en
• 关键词: Russeting; Apple; Mango; Causes; consequences

Russet is an important fruit surface disorder in many fruit crops grown worldwide. This includes ‘Apple’ mango, a mango variety that has considerable market potential, but that is currently not exploited due to the frequent occurrence of russet and the poor visual appearance of russeted fruit. The objective of the project is to identify the mechanistic basis of the russet in ‘Apple’ mango in Kenya and to develop appropriate counter strategies. The following hypothesis three will be investigated and tested: (1) Russet in ‘Apple’ mango is preceded by microscopic cracking of the cuticle and formation of a periderm. (2) Formation of microcracks in ‘Apple’ mango is due to growth stress resulting from a mismatch of surface expansion and cuticle deposition. In addition, moisture on the fruit surface aggravates microcracking. The resulting russeted ‘Apple’ mango shrivels postharvest due to increased skin permeance to water vapor (Khanal et al., 2019).(3) Preventing surface moisture by bagging of fruit and strengthening the structural support of the cuticle by underlying cell layers using GA application decreases russet susceptibility of ‘Apple’ mango without compromising fruit quality.The project is expected to provide fundamental insight into russet formation and the effects of russet on pre- and postharvest performance in ‘Apple’ mango and many other fruit crop species. A better understanding of the mechanism of russet is helpful in developing effective management strategies to reduce russet and to improve marketability of ‘Apple’ mango in Kenya.

黄萎病是世界范围内许多果树上的一种重要的果面病害。这包括‘苹果’芒果，这是一种具有相当大市场潜力的芒果品种，但由于黄褐斑病频繁发生和黄褐斑果实外观较差，目前尚未开发利用。该项目的目标是确定肯尼亚‘苹果’芒果黄腐病的机制基础，并制定适当的对策。将对以下假设三进行研究和检验：(1)‘苹果’芒果中的Russet之前是角质层的微观破裂和周皮的形成。(2)‘苹果’芒果微裂纹的形成是由于表面膨胀和角质层沉积不匹配所产生的生长应力所致。此外，水果表面的水分会加剧微裂纹。由于果皮对水蒸气的渗透性增加，导致‘苹果’芒果采后枯萎(Khanal等人，2019年)。(3)通过套袋防止表面水分，并利用GA处理加强底层细胞层对角质层的结构支持，降低了‘苹果’芒果的黄褐斑病敏感性，而不影响水果品质。该项目有望为‘苹果’芒果和许多其他果树品种的黄褐斑形成以及黄褐斑对采前和采后表现的影响提供基本的见解。深入了解赤霉病的发生机理，有助于制定有效的管理策略，减少赤霉病的发生，提高‘苹果’芒果在肯尼亚的适销性。