BIBLIOTECA HORTICULTURA

BIBLIOTECA HORTICULTURA

Soil fertilization with Ca2+ and Mg2+ may play a distinct role in cassava Postharvest Physiological Deterioration delay

Soil fertilization with Ca2+ and Mg2+ may play a distinct role in cassava Postharvest Physiological Deterioration delay

Astride Stéphanie Mouafi Djabou et al., ACSESS DL

The current research addressed the effect of fertilizers containing Ca2+ and Mg2+ on cassava (Manihot esculenta Crantz) storage roots (CSRs) during postharvest physiological deterioration (PPD).

Cassava PPD 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 PPD for >10 d in the susceptible genotype (SC5), but Mg2+ fertilizer elevated PPD 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 PPD delay in CSRs.
 

Sources
Effects of Calcium and Magnesium Fertilization on Antioxidant Activities during Cassava Postharvest Physiological Deterioration
Astride Stéphanie Mouafi Djabou, Yuling Qinb, Boudjeko Thaddee, Priscila Gonzales Figueiredo, An Feifeib, Luiz J. C. B. Carvalho, Denis Ndoumou Omokolo, Kaimian Li, Nicolas Niemenak and Songbi Chen
ACSESS DL

https://dl.sciencesocieties.org/publications/cs/articles/0/0/cropsci2017.09.0526
doi:10.2135/cropsci2017.09.0526

Picture from Reducing Cyanide-Dependent ROS production in transgenic cassava roots: Impact on Posth-Harvest Physiological deterioration, by Tawanda Zidenga, Dimuth Siritunga & Richard Sayre
http://slideplayer.com/slide/10999954/