Incorporation of 14C‐Photosynthate into Developing Cotton Bolls, Gossypium hirsutum L.1

Incorporation of 14 C‐photosynthate into developing cotton ( Gossypium hirsutum L.) bolls of several ages was studied in the cultivar ‘Paymaster III.’ Maximum incorporation of 14 C‐assimilate into developing boll walls and fiber occurred at 8 to 10 and 23 to 40 days after anthesis, respectively. 14 C‐photosynthate incorporation was rapidly increasing in the developing fibers prior to the completion of fiber elongation. For Paymaster III, ‘Acala SJ‐1,’ and ‘Stoneville 213’ cultivars, the rate of increase of fiber dry weight was maximal prior to the completion of fiber elongation.