Plant Nutrition pp 216-217 | Cite as
Allocation of 11C-labelld photosynthates in wheat plants
Abstract
The distribution of photosynthates in wheat plants was investigated using the 11C technique. Due to the short half-life (20.4 min) of the isotope and its penetrating radiation individual plants could be analysed several times. Wheat seedlings are known for a rapid export of freshly labelled photosynthates from leaves to roots. Early in the day up to 28 % of the 11C labeled compounds were transferred into the root system whereas in the afternoon only about 18 % of the photosynthetic products reached the roots. Wheat plants grown under 350 as well as 700 ppm CO2 responded immediately to ozone with a decline in transpiration. During 2 d of ozone treatment only little effect was observed on photosynthesis but plants under 350 ppm CO2 significantly reduced the carbon supply to the roots.
Key words
11C allocation of carbon labelled photosynthates ozone short-lived isotopes wheatReferences
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