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. 2018 Dec 31;70(22):6549–6559. doi: 10.1093/jxb/ery383

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© The Author(s) 2018. Published by Oxford University Press on behalf of the Society for Experimental Biology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 4. — Change in nocturnal tissue acidity in A. americana tissues in response to variation in night-time temperatures as shown by the percentage of maximum recorded titratable acidity (A) and the calculated temperature index relationship (B). In (A), circles represent data collected by Nobel and Smith (1983), and the × symbols represent data from Neales (1972). The equations of the best-fit fifth-order polynomial and R² values are displayed on the plots. (This figure is available in color at JXB online.)