Composition and food properties ofPachyrhizus ahiparoots and starch

Abstract

The aims of this work were to evaluate productivity and postharvest handling conditions for ahipa roots; to establish a starch extraction procedure and to characterise the morphological, physicochemical and pasting properties of ahipa starch. Plants were grown in Misiones (Argentina), evaluating three planting densities and the application of a flower pruning (FP) practice. FP increased roots yield without modifying the functional properties of the starch. Storage assays allowed to rule out refrigeration and select 25°C as an appropriate temperature. Starch extraction yield was 56.54 g 100 g )1 roots (dry basis). Amylose content was 10.75%. The starch diffractograms were assigned to a type C pattern. Ahipa starch pastes gelatinised at relatively low temperature and showed low retrogradation tendency under refrigeration conditions. Rheological properties indicated that ahipa starch might be adequate as a food thickener. Thus, native ahipa starch seems to be an alternative to other traditional starch sources.

Agro-industrial residue from starch extraction of Pachyrhizus ahipa as filler of thermoplastic corn starch films

“…P. ahipa starch residue (PASR) was obtained using a starch extraction optimized laboratory-scale method proposed by López et al (2010). P. ahipa plants were grown at the INTA Montecarlo farm (Misiones, Argentina).…”

“…In a previous work (López & García, 2012) cassava and ahipa starch films were developed by casting using the extracted starch obtained from the roots and tubers using a simple, low cost and optimized procedure (López et al, 2010). As a by-product from this procedure a solid residue, which could be used for livestock feed or fodder, is obtained.…”

Yam bean (<i>Pachyrhizus erosus</i>) tuber processing in Benin: production and evaluation of the quality of yam bean-<i>gari</i> and yam bean-fortified <i>gari</i>

“…Previous works investigated the physicochemical characteristics of proteins and starch from Pachyrhizus sp. for potential agro-industrial uses López et al, 2010). However, studies on the possibility to process Pachyrhizus spp.…”

Postharvest conservation of the tuberous roots of Pachyrhizus Ahipa (Wedd) Parodi

“…Variations in the shelf life of tuberous roots are related to the types of packaging and their storage environment, but the literature consistently confirms that wellpackaged roots can be stored under refrigeration (13 ± 2°C) for long periods of time and still retain commercial quality (Tessarioli Neto et al 1998, Scalon et al 2000, Oliveira et al 2001, Ribeiro et al 2007). However, López et al (2010), while evaluating the productivity and the conditions of post harvest management from P. ahipa roots cultivated in Misiones, Argentina, verified that the storage at 25°C was better that under refrigeration. This variation observed by the authors may be attributed to the cultivation conditions.…”