Changes in phosphoglucoisomerase activity (A), phosphoglucomutase activity (B), AGPase activity (C) and UGPase activity (D),
expressed on grain base, of rice cultivar Tainung 67 and mutant SA419. Means and S.E. ðn ¼ 4Þ are indicated. The LSD ðP < 0:05Þ for
phosphoglucoisomerase activity, phosphoglucomutase activity, AGPase activity and UGPase activity, across all cultivars and sampling dates,
are 0.06, 0.31, 0.05 and 0.14, respectively.