Grappling with Granulation in Imperial Mandarins
Granulation is a significant disorder affecting Imperial mandarins in Australia, and is the main quality problem cited by consumers. Incidence is highly variable and it is not possible to detect affected fruit in the packing line, making this a difficult issue for the citrus industry to manage. Despite sixty years of international research,the underlying causes of granulation in citrus remain unclear. Research indicates that incidence of granulation can be associated with climatic conditions, low crop load, tree and rootstock vigour, position in the canopy, reduced irrigation frequency and soil type. Some studies suggest that granulated fruit have lower Brix and acid concentrations than normal fruit, and that juice cells are larger and more hydrated in the early stages of development. Review of these studies has led to the development of the hypothesis that the cell wall thickening and gelation associated with granulated vesicles could be related to comparatively high water potential in the juice cells. Higher water potential could be due to low levels of osmotica such as sugars and/or high pressure due to turgidity of the juice cells. The implications of this hypothesis for possible management strategies in irrigation, nutrition, application of plant growth regulators and thinning is discussed.
Citrus reticulata Dryness Water potentia
H. J. Hofman M. W. Smith
Department of Primary Industries and Fisheries, Bundaberg Research Station, 49 Ashfield Road, Bundaberg,Queensland 4670, Australia
国际会议
11th International Citrus Congress(第11届国际柑橘大会)
武汉
英文
496-501
2008-10-01（万方平台首次上网日期，不代表论文的发表时间）