The 14C assimilates exportation rate from leaf increased too,with 17.6% and 6.8% for Kemian 1 and Sumian 15 respectively at 24 h after labeling in 30 DPA.

• 花后30 d铃对位叶标记24 h后14C光合产物的输出；科棉1号增加17.；6%25；苏棉15增加6