Significance of Photosynthetic and Respiratory Exchanges in the Carbon Economy of the Developing Pea Fruit 1

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The nutritional economy of the developing fruit of Pisum sativum L. (cv. Greenfeast) was studied in terms of intake of translocate, incorporation of C and N into dry matter, transpiration, and CO2 exchanges of the fruit with its external and internal atmospheres. The environmental conditions were 12-hr days (22 C, 850 μeinsteins m−2 sec−1 at fruit level); 12-hr nights of 15 C.

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