Positional variation in grain mineral nutrients within a rice panicle and its relation to phytic acid concentration

Su, Da; Sultan, Faisal; Zhao, Naizhuo; Lei, Bingting; Wang, Fu-biao; Pan, Gang; Cheng, Fangmin

doi:10.1631/jzus.b1400157

Cited by 9 publications

(7 citation statements)

References 30 publications

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“…Studies showing high positive correlation of Zn with PA-P content (r = 0.5; <0.01) (Liang el al. 2007) to no correlation between PA and mineral elements (Su et al 2014;Perera et al 2019) have been reported earlier. The present study also revealed absence of significant correlation between the mineral micronutrients (Fe and Zn) and PA which is an indication that reduction of PA as well as increase in the Fe and Zn can be done simultaneously in breeding programs.…”

Section: Discussionmentioning

confidence: 72%

“…The finding was comparable to Chinese japonica rice (6.9 to 10.3 g/kg; mean of 8.7 g/kg) and Korean rice (8.6 to 17.6 g/kg; mean of 12.6 g/kg) (Lee et al 1997;Liu et al 2005;Liang et al 2007). However, in six japonica rice genotypes showed variation for PA in BR ranging from 3.68 to 5.07 mg/g (Su et al 2014), whereas, three indica rice cultivars showed PA content from 3.99 mg/g to 7.34 mg/g (Wang et al 2011). More recently, variation in the PA contents of 69 WRC (World Rice Core collection) accessions found to be in the range of 8.24-17.41 mg/g (Perera et al 2019).…”

Section: Discussionmentioning

confidence: 97%

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Characterizing the diversity of grain phytic acid content in Indian rice landraces by multivariate genetic analyses

Gyani¹,

Bollinedi²,

Krishnan³

et al. 2021

Indian J. Genet

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Phytic acid (PA) acts as chelator of cationic mineral elements iron (Fe) and zinc (Zn) and obstructs their absorption in the human gut. We have evaluated a set of 162 traditional rice landraces for phytic acid phosphorus (PA-P), inorganic phosphorus (Pi) and total phosphorus (TP). Wide variability was observed for PA-P, Pi and TP ranging from 1.12 to 3 mg/g, 0.004 to 0.16 mg/g and 1.17 to 3.04 mg/g respectively. The mineral micronutrients, Fe and Zn were not in correlation with PA-P, Pi and TP implicating the possibility of their independent improvement while PAP showed a significant positive correlation with TP and significant negative correlation with Pi. Principal component analysis (PCA) identified two principal components PC1 and PC2, explaining 50.6 % and 32.1 % of the total variation, respectively. Cluster analysis grouped the accessions into four clusters. The study has also led to the identification of promising donors such as P1490 and Gowri with low PA content to be utilized in rice biofortification programmes.

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Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 97%

Characterizing the diversity of grain phytic acid content in Indian rice landraces by multivariate genetic analyses

Gyani¹,

Bollinedi²,

Krishnan³

et al. 2021

Indian J. Genet

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“…Among the 24 japonica rice cultivars studied by Liu ( 2005 ), the PA content ranged from 0.68% for ‘Xiu 217’ to 1.03% for ‘Huai 9746’. Spikelet architecture changes panicle morphology that can cause grain PA variation in rice depending on the cultivar (Su et al 2014 ). The variation in PA-P content among 18 different rice cultivars grown in Tsukuba, Japan was evident in an experiment conducted using FACE technology (Fig.…”

Section: Reviewmentioning

confidence: 99%

“…The molar ratio of PA/Fe is recommended to be 1 or lower for better Fe absorption from cereals when there are no enhancers for absorption (Hurrell and Egli 2010 ). In rice, grains in the primary rachis and upper rachises tend to have a lower molar ratio of PA/Zn relative to grains in the secondary rachis and lower rachises of the panicle, suggesting that grain position has an effect on Zn bioavailability (Su et al 2014 ). To develop rice with a higher micronutrient bioavailability, it is wise to consider the PA/micronutrient ratio and set the target as a high micronutrient content as well as a low-PA content.…”

Section: Reviewmentioning

confidence: 99%

Manipulating the Phytic Acid Content of Rice Grain Toward Improving Micronutrient Bioavailability

Perera

Seneweera

Hirotsu

2018

Rice

111

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Myo-inositol hexaphosphate, also known as phytic acid (PA), is the most abundant storage form of phosphorus in seeds. PA acts as a strong chelator of metal cations to form phytate and is considered an anti-nutrient as it reduces the bioavailability of important micronutrients. Although the major nutrient source for more than one-half of the global population, rice is a poor source of essential micronutrients. Therefore, biofortification and reducing the PA content of rice have arisen as new strategies for increasing micronutrient bioavailability in rice. Furthermore, global climate change effects, particularly rising atmospheric carbon dioxide concentration, are expected to increase the PA content and reduce the concentrations of most of the essential micronutrients in rice grain. Several genes involved in PA biosynthesis have been identified and characterized in rice. Proper understanding of the genes related to PA accumulation during seed development and creating the means to suppress the expression of these genes should provide a foundation for manipulating the PA content in rice grain. Low-PA rice mutants have been developed that have a significantly lower grain PA content, but these mutants also had reduced yields and poor agronomic performance, traits that challenge their effective use in breeding programs. Nevertheless, transgenic technology has been effective in developing low-PA rice without hampering plant growth or seed development. Moreover, manipulating the micronutrient distribution in rice grain, enhancing micronutrient levels and reducing the PA content in endosperm are possible strategies for increasing mineral bioavailability. Therefore, a holistic breeding approach is essential for developing successful low-PA rice lines. In this review, we focus on the key determinants for PA concentration in rice grain and discuss the possible molecular methods and approaches for manipulating the PA content to increase micronutrient bioavailability.

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“…Oat grains have been searched for years because of specific chemical composition, nutritional and physiological characteristics of the grains. Previous researchers working on wheat and paddy indicated that grain physical characteristics and chemical composition might vary based on the position of grain within spike or panicle (Boz et al, 2012;Su et al, 2014). The studies on physical and chemical characteristics of grains located at different sections of oat panicle are quite limited.…”

Section: Introductionmentioning

confidence: 99%

Variation of Some Physical and Chemical Quality Traits of the Grains in Different Parts of the Oat Panicle

Mut¹

2018

IJAB

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Besides high grain yield, some quality attributes are also desired in oat (Avena sativa L.) grains. The present study was conducted to investigate some physical and chemical characteristics of oat grains located at top, middle and bottom sections of the panicle. A total of twenty five different oat varieties commonly grown in various parts of the world were experimented in randomized blocks design with three replications in for two growing seasons in Samsun, Turkey. Panicles were divided into three groups as of top, middle and bottom. Some physical (thousand-grain weight, grain length and width, groat percentage) and chemical (ash ratio, protein ratio, starch ratio, fat ratio and fatty acids) characteristics of grains in different panicle groups were determined. Significant differences were observed in all quality parameters based on the position of grains within the panicle. Cultivars and cultivar × panicle interactions had significant effects on quality parameters. While higher thousandgrain weight, grain length and width, groat percentage, starch ratio, fat ratio, stearic and oleic acid contents were observed in top grains, higher ash ratio, palmitic and linoleic acid contents were observed in bottom grains.

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Positional variation in grain mineral nutrients within a rice panicle and its relation to phytic acid concentration

Cited by 9 publications

References 30 publications

Characterizing the diversity of grain phytic acid content in Indian rice landraces by multivariate genetic analyses

Characterizing the diversity of grain phytic acid content in Indian rice landraces by multivariate genetic analyses

Manipulating the Phytic Acid Content of Rice Grain Toward Improving Micronutrient Bioavailability

Variation of Some Physical and Chemical Quality Traits of the Grains in Different Parts of the Oat Panicle

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