Effect of drought stress on the morphological and physicochemical properties of starches from Trimezia juncifolia

被引：20

作者：

Almeida, Viviane O. ^{[1
]}

Batista, Karla A. ^{[1
,2
]}

Di-Medeiros, Maria C. B. ^{[1
]}

Moraes, Moemy G. ^{[3
]}

Fernandes, Katia F. ^{[1
]}

机构：

[1] Univ Fed Goias, Inst Ciencias Biol, ICB 2, Lab Quim Polimeros, Goiania, Go, Brazil

[2] Inst Fed Educ Ciencia & Tecnol Goias, Dept Areas Acad, Campus Goiania Oeste, Goiania, Go, Brazil

[3] Univ Fed Goias, Inst Ciencias Biol, ICB 1, Lab Fisiol Vegetal, Goiania, Go, Brazil

来源：

CARBOHYDRATE POLYMERS | 2019年 / 212卷

关键词：

Amylose; Amylopectin; Cataphylls; Drought stress; FUNCTIONAL-PROPERTIES; CHAIN-LENGTH; STRUCTURAL-CHARACTERIZATION; AMYLOSE; AMYLOPECTIN; TUBER; CHROMATOGRAPHY; DIVERSITY; RESPONSES; CERRADO;

D O I：

10.1016/j.carbpol.2019.02.015

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In this study corms from Trimezia juncifolia were collected in the wet (WSS) and dry (DSS) seasons and used for extraction of starch. Results evidenced that drought stress interfered with the yield, morphological and physicochemical properties of the starches. In addition, it was observed a higher content of amylose for DSS (44%) when compared with WSS (41%). Drought stress did not interfere with the degree of polymerization (DP) of amylopectin, whereas decreased the amylose DP for DSS. Also, starch granules changed from A-type polymorph in the DSS to a C-C-type in WSS. Drought stress reduced the starch crystallinity from 27% in WSS to 25.9% in DSS. In addition, the endothermic transition temperatures and enthalpy change of transition were also affected by drought stress. Finally, results clearly demonstrate that changes in the morphological and physicochemical properties of the starch granules figure as adaptive strategies of T. junciolia to drought stress.

引用

页码：304 / 311

页数：8

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