Relationship Among the Phytic Acid and Protein Content During Maize Grain Maturation

Abstract

The accumulation of phytic acid with relation to the deposition of the protein component in grain during maturation of three maize varieties grown under the same topographical and agrotechnical conditions over 2 crop years was investigated. Phytic acid was determined by the spectrophotometric method of Mohamed et al. (1986). Phytic acid content increased significantly (P = 0.05) up until the late stage of dough grain maturity. Afterwards, until full grain maturity, no significant changes of phytic acid content have been obtained. At the same time, changes of phytic acid content expressed on a dry matter basis correlate highly significantly (P = 0.001) and negatively with total nitrogen in both vegetation years (r = ‐0.848 and r = ‐0.845) and alpha‐aminonitrogen content (r=‐0.799 and r = ‐0.792), but highly significantly (P = 0.001) and positively with prolamine content (r = 0.823 and 0.654). Grain maturation under conditions of increased moisture and lower temperature resulted in lower phytic acid level.

Effects of wheat maturation stage and cooking method on dietary fiber and phytic acid contents of firik, a wheat-based local food

“…It was shown, in two studies investigating the effects of maturation stages on the composition of maize, that PA content of maize increased substantially as it is matured [20,21]. A similar trend was also evident for the phytate P contents of the firik samples.…”

Relative contribution of seed phosphorus reserves and exogenous phosphorus uptake to maize (Zea mays L.) nutrition during early growth stages

“…Phytate has been shown to play two roles in seeds, first, it acts as a reservoir of inositol phosphate and cations, and second, it controls inorganic phosphate homeostasis in both developing seeds and seedlings (Lott et al 1995). Phytic acid and P concentrations in seeds of a given species may vary with cultivar, soil fertility status, and climatic conditions (Horvatic and Balint 1996;Miller et al 1980;Raboy et al 1991).…”

Short Communication. Effect of phosphorus nutrition and grain position within maize cob on grain phosphorus accumulation

“…Phytate is considered as having anti-nutrient characteristics when consumed by non ruminant animals (Raboy et al, 1989). Phytate content of cereals is highly correlated with total P (Lockhart & Hurt, 1986), and P concentrations in seeds of a given species may vary with cultivar, inherent soil P status, and climatic conditions (Miller et al, 1980;Raboy et al, 1990;Horvatic & Balint, 1996).…”