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Articles

Translocation of Sucrose by Squash Plants ¹

^a Department of Botany and Plant Pathology, Colorado State University, Fort Collins, Colorado 80521

Sucrose-¹⁴C was fed to the leaf blades of squash plants (Cucurbita pepo L. var. melopepo torticallis Bailey) for 30 or 60 minutes. Petioles of treated plants were cut into sections and extracted. The majority of the ¹⁴C within the petiole was in sucrose rather than stachyose, the sugar that is transported by the squash plants when ¹⁴CO₂ is supplied. This indicates that the phloem loading system of squash plants is not the system that specifies which sugar is transported.