Photosynthate Transport Using Tritiated Water 1

AUTOR(ES)

Choi, Ivan C.

RESUMO

The exchange of HTO with aerial portions of the soybean was studied under a variety of conditions. When fed to a lone leaf or leaflet in a saturated air atmosphere (all other leaves and the growing point having been excised), the HTO profile virtually ceases at a distance of 2 cm from the feeding chamber in the photosynthetic plant, but is greater and more extensive in the unilluminated plant. The differences are accentuated when roots are excised. Under these latter conditions the photosynthetic T-fixed gradient virtually disappears.

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