Vol. 14 No. 1-2. (2008)
Articles

The effect of day and night temperatures on apple skin colour formation

Published February 19, 2008
L. Lakatos
University of Debrecen, Institute for Extension and Development, H-4032 Debrecen, Böszörményi st. 138. Hungary
T. Szabó
Fruit Research and Extension Institute, Újfehértó H-4244, Vadas tag 2.
Z. Szabó
University of Debrecen, Institute for Extension and Development, H-4032 Debrecen, Böszörményi st. 138. Hungary
M. Soltész
College of Kecskemét, Faculty of Horticulture, Fruitgrowing Department, H-6000 Kecskemet, Erdei Ferenc tér 4-6. Hungary
S. Zhongfu
Chinese Academy of Agricultural Sciences, No. 12, Zhongguancun South Street, Bejung 1000081, P.R. China
Y. Wang
Chinese Academy of Agricultural Sciences, No. 12, Zhongguancun South Street, Bejung 1000081, P.R. China
J. Nyéki
University of Debrecen, Institute for Extension and Development, H-4032 Debrecen, Böszörményi st. 138. Hungary
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APA

Lakatos, L., Szabó, T., Szabó, Z., Soltész, M., Zhongfu, S., Wang, Y., & Nyéki, J. (2008). The effect of day and night temperatures on apple skin colour formation. International Journal of Horticultural Science, 14(1-2.), 21-25. https://doi.org/10.31421/IJHS/14/1-2./776

The colour of fruits is considered to be an important quality indicator. Saleability greatly depends on how well covered the colour is of the specific type of fruits. It is a well-known phenomenon by growers that apples get nicer colours in one year while in other years the basically red and green colour cultivars can be differentiated only by morphological characteristic features. Cover colour is one of the phenometric variables and it is a well-known fact that significant differences can be experienced year by year. The experienced oscillation can be the cause of inappropriate water- and nutriment supply, however it can be the result of some kind of plant disease, extremely high or low temperature, setting rate above the average and outstanding fruit density. In the present examination it is postulated that the degree of cover colour is mostly influenced by day and night temperature. Therefore, our study aims to find out whether it is true or not. Cover colour belongs to those phenometric characteristic features, only the final value of which is taken into consideration; due to their nature of establishment or forming time it seems useless to follow closely the change in the time of vegetation. However, determining the start of colouring and knowing the dynamics of full colouring could carry very important information for growers. If it is possible to determine the curve describing the time change of colouring, we have a possibility to estimate it by means of enviroment variables. So it is also possible to model pigmentation in the future. Knowing this, colouring irrigation could be made more efficient in the future. For this, as a first step, it is inevitable to find out what the relationship is between the main meteorogical variables, namely day and night temperature and the difference between day and night temperature, and colour cover. In this study we summarize and show these interrelations.

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