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Abstract

The relations between storage behaviour and
some physiological characteristics of individual apples
have been studied.
The fruits of a single tree have shown considerable
individual variability in the different characteristics.
Improved methods have been devised for extracting
samples of the internal atmosphere of apples and for
measuring respiratory activity on the basis of oxygen uptake.
The investigations have shown no evidence that a
higher concentration of internal carbon dioxide in the
apple increases its susceptibility to breakdown.
Internal carbon dioxide was shown to be positively
correlated with the respiration rate and protein nitrogen
content.
The rate of oxygen uptake measured shortly after
picking was positively correlated with the incidence of
bitter pit in Cox variety and of Jonathan spot in Jonathan.
These disorders manifested themselves after 14 or more weeks
of cool storage.
The relation between Jonathan spot and fruit size
in apples which were subjected to insertion of a gas pipette
and to delay of ten days before cool storage was anomalous
compared with uninjured fruit stored immediately. There was a strong positive correlation between
the rate of yellowing and the cell volume of the fruit.
Correlations found between certain characteristics and differences found between fruits of light
and heavy crops were in accord with findings reported by other workers.
Further investigations are now in progress
which include studies of the resistances to gaseous
exchange and the role of mineral elements.

Item Type:	Thesis - Unspecified
Authors/Creators:	Cerny, Jaroslav
Keywords:	Apples, Apples
Copyright Holders:	The Author
Copyright Information:	Copyright 1962 the Author - The University is continuing to endeavour to trace the copyright owner(s) and in the meantime this item has been reproduced here in good faith. We would be pleased to hear from the copyright owner(s).
Additional Information:	Thesis (M.Sc.) - University of Tasmania, 1963. Includes bibliography
Item Statistics:	View statistics for this item

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