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Effects of pH and deuterium oxide on the heat-inactivation temperature of chloroplasts

✍ Scribed by Pavel S. Venediktov; Alla A. Krivoshejeva

Publisher
Springer-Verlag
Year
1984
Tongue
English
Weight
385 KB
Volume
160
Category
Article
ISSN
0032-0935

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✦ Synopsis

The inactivation temperature for Hill activity and for the long-lived delayed fluorescence of isolated Pisum sativum L. chloroplasts was found to depend on pH, the maximal value being in the pH region 5-7. Salts increase the inactivation temperature by 4-7 ~ C. Effects of DzO and some other substances that modify the thermostability of chloroplasts are dependent on pH. It is concluded that thermal denaturation of proteins is the most probable mechanism for heat inactivation of chloroplasts.

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