Zinc biofortification of cereals: rice differs from wheat and barley

Stomph, T.J.; Jiang, Wen; Struik, P.C.

doi:10.1016/j.tplants.2009.01.001

Cited by 75 publications

(78 citation statements)

References 10 publications

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“…On the other hand, the present results contradict results previously reviewed by Stomph et al (2009) that, unlike in wheat, the Zn loaded in rice grains was remobilized from roots, stem and sheaths but not from leaves. The present results together with those of Phattarakul et al (2012) suggest that promoting the Zn content in vegetative tissues by foliar Zn application results in Zn being available for re-translocation into seeds.…”

Section: Discussioncontrasting

confidence: 74%

Effect of different foliar zinc application at different growth stages on seed zinc concentration and its impact on seedling vigor in rice

Boonchuay

Çakmak

Rerkasem

et al. 2013

Soil Science and Plant Nutrition

129

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This study evaluated how zinc (Zn) concentration of rice (Oryza sativa L.) seed may be increased and subsequent seedling growth improved by foliar Zn application. Eight foliar Zn treatments of 0.5% zinc sulfate (ZnSO 4 Á 7H 2 O) were applied to the rice plant at different growth stages. The resulting seeds were germinated to evaluate effects of seed Zn on seedling growth. Foliar Zn increased paddy Zn concentration only when applied after flowering, with larger increases when applications were repeated. The largest increases of up to ten-fold were in the husk, and smaller increases in brown rice Zn. In the first few days of germination, seedlings from seeds with 42 to 67 mg Zn kg À1 had longer roots and coleoptiles than those from seeds with 18 mg Zn kg À1 , but this effect disappeared later. The benefit of high seed Zn in seedling growth is also indicated by a positive correlation between Zn concentration in germinating seeds and the combined roots and shoot dry weight (r ¼ 0.55, p < 0.05). Zinc in rice grains can be effectively raised by foliar Zn application after flowering, with a potential benefit of this to rice eaters indicated by up to 55% increases of brown rice Zn, and agronomically in more rapid early growth and establishment.

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Section: Discussioncontrasting

confidence: 74%

Effect of different foliar zinc application at different growth stages on seed zinc concentration and its impact on seedling vigor in rice

Boonchuay

Çakmak

Rerkasem

et al. 2013

Soil Science and Plant Nutrition

129

View full text Add to dashboard Cite

show abstract

“…It would seem for rice at least that endosperm loading might be low, not so much because of transport barriers but because of limited uptake or sink capacity in the highly starch-filled cells (Stomph et al 2009). Hence for rice, the sink capacity needs to be enhanced by increasing the nonstarch to starch ratio in the endosperm through a larger number of cells with slightly reduced size while maintaining seed production (Stomph et al 2009).…”

Section: Iron and Zinc Uptake Accumulation And Translocation To mentioning

confidence: 99%

“…Hence for rice, the sink capacity needs to be enhanced by increasing the nonstarch to starch ratio in the endosperm through a larger number of cells with slightly reduced size while maintaining seed production (Stomph et al 2009). Whether the same is true in the case of wheat and barley is an important issue for future study, and obviously there is a need to generate results on the comparative evaluation of these crops with rice (Stomph et al 2009). …”

Section: Iron and Zinc Uptake Accumulation And Translocation To mentioning

confidence: 99%

Nutritionally Enhanced Staple Food Crops

Dwivedi

Sahrawat

Kedar

et al. 2012

Plant Breeding Reviews

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“…However, grain could also accumulate Zn remobilized from leaves, as has been shown in soybean (Khan and Weaver, 1989) and wheat . Although the literature is limit for Zn transport from stems and leaves to rice grains, it is argued that it is different from wheat and barely (Stomph et al, 2009). Jiang et al (2007) have investigated the uptake and distribution of Zn during rice grain development and suggested that most of the Zn accumulated in the grains originates from uptake by root after flowering and not from Zn remobilization from leaves, both under sufficient or surplus Zn supply.…”

Section: Introductionmentioning

confidence: 99%

Characterization of 68Zn uptake, translocation, and accumulation into developing grains and young leaves of high Zn-density rice genotype

Chun-yong

Feng

Shohag

et al. 2011

J. Zhejiang Univ. Sci. B

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Zinc (Zn) is an essential micronutrient for humans, but Zn deficiency has become serious as equally as iron (Fe) and vitamin A deficiencies nowadays. Selection and breeding of high Zn-density crops is a suitable, cost-effective, and sustainable way to improve human health. However, the mechanism of high Zn density in rice grain is not fully understood, especially how Zn transports from soil to grains. Hydroponics experiments were carried out to compare Zn uptake and distribution in two different Zn-density rice genotypes using stable isotope technique. At seedling stage, IR68144 showed higher 68 Zn uptake and transport rate to the shoot for the short-term, but no significant difference was observed in both genotypes for the long-term. Zn in xylem sap of IR68144 was consistently higher, and IR68144 exhibited higher Zn absorption ratio than IR64 at sufficient (2.0 µmol/L) or surplus (8.0 µmol/L) Zn supply level. IR64 and IR68144 showed similar patterns of 68 Zn accumulation in new leaves at seedling stage and in developing grains at ripening stage, whereas 68 Zn in new leaves and grains of IR68144 was consistently higher. These results suggested that a rapid root-to-shoot translocation and enhanced xylem loading capacity may be the crucial processes for high Zn density in rice grains.

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Zinc biofortification of cereals: rice differs from wheat and barley

Cited by 75 publications

References 10 publications

Effect of different foliar zinc application at different growth stages on seed zinc concentration and its impact on seedling vigor in rice

Effect of different foliar zinc application at different growth stages on seed zinc concentration and its impact on seedling vigor in rice

Nutritionally Enhanced Staple Food Crops

Characterization of 68Zn uptake, translocation, and accumulation into developing grains and young leaves of high Zn-density rice genotype

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