Department of Plant Science and Agricultural Resources, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand.
Carbohydr Polym. 2013 Oct 15;98(1):241-8. doi: 10.1016/j.carbpol.2013.06.016. Epub 2013 Jun 20.
Starches were isolated from immature waxy corn kernels harvested at 0, 2, 4 and 6 days after optimum stage (DAO) and from mature kernels at 16 DAO. The starch contents showed varied according to genotypes and harvesting stages. The accumulation of starches showed an increasing trend in relation to delayed harvesting time, from the optimum stage until the physiological maturity stage. Among all harvesting stages, medium granules had the highest contribution to the total starch volume (60.8-81.5%), followed by large (5.7-30.1%), and small granules (9.1-15.3%). Average chain length distribution of amylopectin ranged from DP 14.7 to 16.9 for KKU-UB, DP 16.9 to 17.4 for KKU-JD, and DP 5.7 to 30.1 for Violet white. The pasting behaviors of starches were greatly affected by harvesting times. The peak viscosity of starches increased with delayed harvesting until physiological maturity and then decreased until dried kernels at 35 days after pollination.
从最佳收获期（0 天）后 2、4 和 6 天收获的未成熟蜡质玉米籽粒以及 16 天收获的成熟玉米籽粒中分离出淀粉。淀粉含量因基因型和收获期而异。淀粉的积累随着收获时间的延迟而呈增加趋势，从最佳收获期到生理成熟期。在所有收获阶段中，中粒对总淀粉体积的贡献最高（60.8-81.5%），其次是大粒（5.7-30.1%）和小粒（9.1-15.3%）。直链淀粉的平均链长分布范围为 KKU-UB 的 DP 14.7 至 16.9、KKU-JD 的 DP 16.9 至 17.4 以及 Violet white 的 DP 5.7 至 30.1。淀粉的糊化特性受收获时间的影响很大。随着收获时间的延迟，淀粉的峰值黏度增加，直到生理成熟，然后下降，直到授粉后 35 天干燥的玉米籽粒。
