Dry weight accumulation and starch‐synthesis enzymes in grain of cultured ears of three winter wheat varieties

摘要: Detached ears of three winter wheat (Triticum aestivum L.) varieties were cultured in solution for 12 days with sucrose levels varying from 36.5 to 292 mM. The dry weight and starch content grains increased asymptotically the level solution. At 4 culture, glucose phosphate isomerase (EC 5.3.1.9) activity grain−1 was lower mM than higher medium; at 8 days, adenosinc diphosphoglucose pyrophosphorylase 2.7.7.27) (soluble plus bound) synthase 2.4.1.21) activities 146 73 sucrose. multiple regression over these enzyme showed that relatively more important as an independent variable. variety Maris Huntsman Splendeur Hobbit. water other two varieties. isomerase, adenosine smaller Hobbit al they Splendeur. varietal differences related especially synthase.