Occurrence of ‘Yuzuhada’, a physiological disorder of Japanese pear (Rehd. cv. ‘Nijisseiki’), in relation to its nutrient content and respiration rates

Kawamata, Shigetoshi

doi:10.1016/0304-4238(78)90019-5

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…A wide range of environmental, physiological, and biochemical factors, such as tree age, soil conditions, the climate of the growing season [11], rootstocks [12], flower position and flowering time [13], growth regulators [14], as well as different daily orchard managements, including irrigation, fertilization, and pruning [8,15,16], have all been reported to influence the incidence of cork spot disorder. An imbalance in mineral nutrition in the fruit was regarded as the principal influence factor for cork spot disorder [17,18], of which calcium (Ca) deficiency has received the most attention [19,20]. For example, in 'Anjou' pear (P. communis L.) fruit, Ca was negatively correlated with cork spot both at harvest and after storage [15].…”

Section: Introductionmentioning

confidence: 99%

Mineral and Metabolome Analyses Provide Insights into the Cork Spot Disorder on ‘Akizuki’ Pear Fruit

Yang

Zhu

et al. 2023

Horticulturae

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Cork spot is a common physiological disorder in pear fruits, which has been found in some pear cultivars. Mineral nutrition imbalance in fruit is regarded as the principal influence factor for disorder incidence, with some ongoing confusion and controversy. In our research, we explored the cork spot characteristics in Japanese pear ‘Akizuki’ (Pyrus pyrifolia Nakai), adopted metabolome and mineral content analysis for healthy and disordered fruits, and made a correlation analysis of mineral and metabolites. Cork spots are mainly distributed on the outer flesh beneath the fruit peel. In cork spotted tissues, superoxide (SOD) and peroxidase (POD) activities, as well as malondialdehyde (MDA) content, increased. A total of 1024 known metabolites were identified from all the samples and more changes in metabolism were detected between normal and cork spotted flesh tissues. Correlation analysis displayed that Ca, especially the Mg/Ca in fruits, could be used to predict whether an orchard will develop cork spot disorder; Mg and B were associated with the appearance of symptoms, and the contents of Zn, Fe, and Mg, as well as Mg/B and Zn/B, might be strongly tied to the formation of cork spots in pears. This research provides insights into the occurrence of pear cork spot disorder and clarifies the role of minerals.

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Section: Introductionmentioning

confidence: 99%

Mineral and Metabolome Analyses Provide Insights into the Cork Spot Disorder on ‘Akizuki’ Pear Fruit

Yang

Zhu

et al. 2023

Horticulturae

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“…The typical characteristics of this disorder in pears are brown desiccated flesh or grayish corky lesions beneath the fruit skin [ 1 ], and a bumpy fruit surface in some cultivars [ 2 ]. This disorder in pears initiates in the early developmental stage of the fruit and continues to harvest time, depending on cultivar specificity [ 3 ]. ‘Akituki’ ( Pyrus pyrifolia ), bred in Japan in 1988, is a very popular cultivar in China for its large fruit size, pretty fruit shape and taste.…”

Section: Introductionmentioning

confidence: 99%

Nitrendipine-Treatment Increases Cork Spot Disorder Incidence in Pear ‘Akituki’ (Pyrus pyrifolia Nakai.) by Altering Calcium Distribution Inside the Fruit

Cui

Wang

et al. 2021

Plants

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‘Akituki’ (Pyrus pyrifolia Nakai.) is a very popular and profitable pear cultivar in China. However, its high susceptibility to cork spot disorder has limited its expansion of cultivated area. The mechanisms of cork spot disorder have been discussed extensively, focusing on Ca2+ deficiency, yet no consensus has been made. In this study, we applied nitrendipine (NI) as a Ca2+ uptake inhibitor to explore the role of calcium in cork spot disorder occurrence. Results showed that NI treatment on the fruit remarkably increased the incidence of cork spot disorder; alteration of mineral contents happened at the early developmental stage of the fruit, especially on the outer flesh and the peel of the fruit; and this gap was filled gradually along with the expansion of the fruit. Significant differences in the expression levels of Ca2+ transport-related genes were found in the inner flesh, outer flesh and peel during the fruit growth period. The observation of free Ca2+ localization indicated the intracellular imbalance of Ca2+ in the NI-treated fruit. In conclusion, NI treatment reduced the calcium content in the fruit at an early developmental stage, altered the related expression of genes and influenced the cellular Ca2+ balance in the fruit, which prompted the occurrence of cork spot disorder. Measures for the prevention and control of cork spot disorder should be taken at the early stage of the fruit development in the field.

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Physiological Disorders and Maladies of Pear Fruit

Raese

1989

Horticultural Reviews

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Occurrence of ‘Yuzuhada’, a physiological disorder of Japanese pear (Rehd. cv. ‘Nijisseiki’), in relation to its nutrient content and respiration rates

Cited by 5 publications

References 15 publications

Mineral and Metabolome Analyses Provide Insights into the Cork Spot Disorder on ‘Akizuki’ Pear Fruit

Mineral and Metabolome Analyses Provide Insights into the Cork Spot Disorder on ‘Akizuki’ Pear Fruit

Nitrendipine-Treatment Increases Cork Spot Disorder Incidence in Pear ‘Akituki’ (Pyrus pyrifolia Nakai.) by Altering Calcium Distribution Inside the Fruit

Physiological Disorders and Maladies of Pear Fruit

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