Center for Tropical Roots and Starch (CERAT), São Paulo State University (UNESP), Universitaria Avenue 3780, PC 18.610-034, Botucatu, São Paulo, Brazil.
Center for Tropical Roots and Starch (CERAT), São Paulo State University (UNESP), Universitaria Avenue 3780, PC 18.610-034, Botucatu, São Paulo, Brazil.
Int J Biol Macromol. 2021 Sep 30;187:113-118. doi: 10.1016/j.ijbiomac.2021.07.116. Epub 2021 Jul 21.
Our study was based on the fact that physiological changes in the plant resulting from the growth conditions alter the properties of the starch. An experimental trial was installed with cassava plants in poor phosphorus soil. A part of plants received phosphate fertilization at a level three times higher than the recommended dose, in order to provide high availability of phosphorus in the soil. The plants grew for two years and the starches were isolated at three times in the second vegetative cycle. The starches had A-type X-ray pattern. Starches isolated from cassava plants grown in soils with high phosphorus had increases of more than 100% in the content of bound phosphorus, which caused changes in the size of the granules, amylose, swelling power, solubility, pasting and thermal properties. These results indicate possibilities of increasing the commercial value of native cassava starch due to the expansion of use, considering the range of uses of phosphate starches for food and non-food purposes.
我们的研究基于这样一个事实，即植物在生长条件下发生的生理变化会改变淀粉的性质。在磷素贫瘠的土壤中种植木薯进行了一项实验。一部分植物接受了比推荐剂量高三倍的磷酸盐施肥，以便为土壤提供高磷的可用性。植物生长了两年，在第二个营养周期分三次分离出淀粉。这些淀粉具有 A 型 X 射线图谱。从在高磷土壤中生长的木薯植物中分离出来的淀粉，其结合磷含量增加了 100%以上，这导致颗粒、直链淀粉、膨胀能力、溶解度、糊化和热性质发生变化。这些结果表明，由于磷酸盐淀粉在食品和非食品用途中的广泛应用，考虑到其用途范围，可以提高本地木薯淀粉的商业价值。
