Effect of Several Germination Conditions on Total P, Phytate P, Phytase, and Acid Phosphatase Activities and Inositol Phosphate Esters in Rye and Barley

Centeno, Carmen; Viveros, Agustı́n; Brenes, Agustı́n; Canales, Rosa; Lozano, Ana; Cuadra, Celia de la

doi:10.1021/jf010023c

Cited by 53 publications

(41 citation statements)

References 44 publications

(65 reference statements)

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“…This implies that Pi has an important role not only in determining plant growth and yield but also during earlier stages of seed germination and seedling growth. The importance of Pi during seed germination may result from Pi enhancing the uptake of nutrients or, alternatively, reducing the need of Pi that stored in seeds (Centeno et al 2001).…”

Section: Discussionmentioning

confidence: 99%

Molecular characterization of a tomato purple acid phosphatase during seed germination and seedling growth under phosphate stress

2015

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SlPAP1 is a phosphate starvation responsive purple acid phosphatase during tomato seed germination. Future research on its family members in tomato might improve the phosphate stress tolerance. Phosphate deficiency is a major constraint upon crop growth and yield. In response to phosphate deficiency, plants secrete acid phosphatases (APases) to scavenge organic phosphate from soil. In this study, we investigated the impact of Pi starvation on germination and seedling growth of tomato, and we then cloned and characterized a phosphate starvation responsive purple APase (SlPAP1) that expressed during tomato seedling growth. Our results showed that phosphate deficiency reduced germination and growth rates of tomato, and also increased intracellular and secretory APase activity in a concentration-dependent manner. An in-gel activity assay found that two APases of 50 and 75 kDa were secreted during conditions of phosphate deficiency. SlPAP1 is a single copy gene belonging to a small gene family. It was expressed as a cDNA of approximately 1.5 kbp encoding a secreted glycoprotein of 470 amino acids. Northern blot analysis showed that SlPAP1 was specifically expressed in root tissue during phosphate deficiency. SlPAP1 had high sequence identity (56-89%) with other plant PAPs and contained highly conserved metal-binding residues. SlPAP1 is the first PAP to be cloned and characterized from tomato. This study provides useful information for future research on PAP family members in tomato, leading to better understanding of phosphate deficiency in this important crop plant.

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Section: Discussionmentioning

confidence: 99%

Molecular characterization of a tomato purple acid phosphatase during seed germination and seedling growth under phosphate stress

2015

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“…Phytase activity increases considerably during germination [279], but there are great differences between different cereals. Barley has shown an increase of phytase activity up to 11 times of the original one [280], while phytases in wheat, rye and oats increased 4.5, 2.5 and 9 times from the original activity [277].…”

Section: Soaking Malting and Germination Of Cerealsmentioning

confidence: 99%

Phytate in foods and significance for humans: Food sources, intake, processing, bioavailability, protective role and analysis

Schlemmer¹,

Frølich

Prieto

et al. 2009

Molecular Nutrition Food Res

725

604

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The article gives an overview of phytic acid in food and of its significance for human nutrition. It summarises phytate sources in foods and discusses problems of phytic acid/phytate contents of food tables. Data on phytic acid intake are evaluated and daily phytic acid intake depending on food habits is assessed. Degradation of phytate during gastro-intestinal passage is summarised, the mechanism of phytate interacting with minerals and trace elements in the gastro-intestinal chyme described and the pathway of inositol phosphate hydrolysis in the gut presented. The present knowledge of phytate absorption is summarised and discussed. Effects of phytate on mineral and trace element bioavailability are reported and phytate degradation during processing and storage is described. Beneficial activities of dietary phytate such as its effects on calcification and kidney stone formation and on lowering blood glucose and lipids are reported. The antioxidative property of phytic acid and its potentional anticancerogenic activities are briefly surveyed. Development of the analysis of phytic acid and other inositol phosphates is described, problems of inositol phosphate determination and detection discussed and the need for standardisation of phytic acid analysis in foods argued.

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“…During germination, phytase breaks down phytate and releases phosphate and inositol (Bohn et al, 2008;Centeno et al, 2001;EL-Mahdy and EL-Sebaiy, 1982;Kumar et al, 2010;Reddy et al, 1982). However, to human health, phytate has advantages and disadvantages.…”

Section: Chelation Properties Of Phytatementioning

confidence: 99%

Iron Bioavailability in Low Phytate Pea

et al. 2015

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Field pea (Pisum sativum L.) seeds have high nutritional value but also contain phytate which can inhibit the absorption and utilization of nutrients. Phytate is the main storage form of phosphorus in the seeds but chelates Fe, Zn and some other micronutrients and is not well digested by monogastrics. Peas with pigmented seed coats contain polyphenols which also have anti-nutritional properties. To increase the nutritional value of field pea seeds, two low phytate lines (1-150-81 and 1-2347-144) containing higher inorganic phosphorus concentration (IN-P) and lower phytate-phosphorus concentration (PA-P) than the normal phytate varieties were developed from CDC Bronco in previous research. The objectives of this research were 1) to determine the effect of genotype and environment on iron bioavailability in a set of five pea varieties differing in phytate concentration and iron concentration using in vitro digestion/Caco-2 cell culture bioassay; 2) to determine the effect of seed coats on iron bioavailability by testing whole seeds compared to dehulled seeds in varieties differing in seed coat pigmentation using in vitro digestion/Caco-2 cell culture bioassay; 3) to determine the inheritance of iron bioavailability in field pea by evaluating recombinant inbred lines differing in phytate concentration using in vitro digestion/Caco-2 cell culture bioassay; 4) to determine the effects of pea with the low phytate trait on body weight and hemoglobin concentration of chickens. Iron concentration (FECON) did not differ significantly between normal and low phytate varieties. Iron bioavailability (FEBIO) of the two low-phytate lines was 1.4 to 1.9 times higher than that of the three normal phytate varieties, and growing environment also had a significant effect on FEBIO. Peas with pigmented seed coats contained 7 times lower FEBIO than peas with non-pigmented seed coat. The removal of the seed coat increased the FEBIO in peas with pigmented seed coat 5 to 6 times. From previous research on PR-15 recombinant inbred lines (RILs) which were developed from a cross between low phytate line 1-2347-144 and a normal phytate variety CDC Meadow, it was found that PA-P was controlled by a single gene. FEBIO, in this study, was also found to follow a bimodal frequency distribution, characteristic of single gene iii control, and it was highly correlated with PA-P in the PR-15 lines. In vivo studies were used to evaluate iron absorption of chickens fed with low and normal phytate pea diets. The diets containing the low-phytate pea lines had no significant effect on chicken body weight and hemoglobin level, compared with the diets containing normal phytate pea varieties. An unexpected high FECON was discovered in the diets that was traced to the ingredients of limestone and dicalcium-phosphate which likely affected the experimental results.iv

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Effect of Several Germination Conditions on Total P, Phytate P, Phytase, and Acid Phosphatase Activities and Inositol Phosphate Esters in Rye and Barley

Cited by 53 publications

References 44 publications

Molecular characterization of a tomato purple acid phosphatase during seed germination and seedling growth under phosphate stress

Molecular characterization of a tomato purple acid phosphatase during seed germination and seedling growth under phosphate stress

Phytate in foods and significance for humans: Food sources, intake, processing, bioavailability, protective role and analysis

Iron Bioavailability in Low Phytate Pea

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