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Effects of Calcium and Magnesium Fertilization on Antioxidant Activities during Cassava Postharvest Physiological Deterioration

文献类型： 外文期刊

作者： Djabou, Astride Stephanie Mouafi 1 ; Qin, Yuling 2 ; Thaddee, Boudjeko; Figueiredo, Priscila Gonzales 2 ; An 1 ;

作者机构： 1.Univ Yaounde I, Lab Plant Physiol, Dept Biol Sci, Higher Teachers Training Coll, Yaounde, Cameroon

2.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Key Lab, Minist Agr Germplasm Resources Conservat & Utiliz, Danzhou City, Hainan, Peoples R China

3.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Key Lab, Minist Agr Germplas

期刊名称：CROP SCIENCE （ 影响因子：2.319； 五年影响因子：2.631 ）

ISSN： 0011-183X

年卷期： 2018 年 58 卷 3 期

页码：

收录情况： SCI

摘要： The current research addressed the effect of fertilizers containing Ca2+ and Mg2+ on cassava (Manihot esculenta Crantz) storage roots (CSRs) during postharvest physiological deterioration (PP D). Cassava PP D tolerant and susceptible genotypes were grown in pots and treated with fertilizers containing Ca2+ or Mg2+. Eight months after planting, CSRs were harvested and stored at room temperature for 30 d. Morphological changes, antioxidant activities, mineral content, and starch content were determined. The results indicated that application of Ca2+ and Mg2+ fertilizers delayed PP D for > 10 d in the susceptible genotype (SC5), but Mg2+ fertilizer elevated PP D in the tolerant genotype (QZ1). The Ca2+ fertilizer significantly increased fresh weight. A significant decrease in starch content in CSRs of SC5 treated with Mg2+ fertilizer was observed. The Mg2+ fertilizer slightly enhanced Ca2+, Mg2+, and K+ contents in both genotypes. In addition, Ca2+ fertilization led to a significant increase in H2O2 content and subsequent elevation of activities of catalase and peroxidase in both genotypes, especially at harvest. Our findings suggest that soil fertilization with fertilizers containing Ca2+ and Mg2+ may play a distinct role in PP D delay in CSRs.

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