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Linking photorespiration, monoterpenes and thermotolerance in Quercus by Josep Peñuelas; Joan Llusià is a Agricultural and Biological Sciences article available to read on EtoBox.

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## Summary The functions of two important plant processes, photorespiration and monoterpene production remain controversial. Here, we investigated one possible function, that of protection of plants from photodamage at high temperatures. Fluorescence, reflectance, monoterpene concentrations and visual leaf damage were measured in __Quercus ilex__ seedlings exposed to temperature increases from 25 to 50°C (in 5°C steps) under photorespiratory (21% O ~2~ ) or nonphotorespiratory (2% O ~2~ ) atmospheres, and under control or terpene fumigation conditions. Lower variable to maximum fluorescence ratio (Fv : Fm: potential photochemical efficiency of photosystem II, PSII) and electron transport rate (ETR) were found in nonphotorespiratory conditions at temperatures greater than 35°C. Monoterpene concentrations were also lower, and leaf damage greater, in the low O ~2~ atmospheres. Monoterpene fumigation, which increased the foliar terpene concentrations by two‐ to four‐fold, increased the photochemical efficiency between 35°C and 50°C, and decreased leaf damage, only under the nonphotorespiratory conditions. These results provide evidence that: photorespiration decreases photodamage, espe

Who reads Linking photorespiration, monoterpenes and thermotolerance in Quercus?

Author

Josep Peñuelas; Joan Llusià

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Cambridge University Press (CUP); Wiley (ISSN 0028-646X)

Published

2002

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)