Genotypic Variation in Zinc Uptake and Utilization by Plants

Graham, Robin D.; Rengel, Zdenko

doi:10.1007/978-94-011-0878-2_8

Cited by 168 publications

(102 citation statements)

References 36 publications

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“…At present, the level of Zn ef®ciency in wheat is not suf®cient, being less than rye and triticale, which are the most Zn-ef®cient species. Although the genetic variation among wheat genotypes is quite large (Graham and Rengel, 1993;Rengel and Graham, 1995a;Cakmak et al, 1996c, d), even the most Znef®cient genotypes/cultivars show a decrease in dry matter and or grain yield when grown under Znde®cient conditions (Graham et al, 1992;Cakmak et al, 1997a). Especially for durum wheats, Zn fertilization is crucial to obtain a reasonable yield under Zn-de®cient conditions, because of their low genetic tolerance to Zn de®ciency.…”

Section: Effectiveness Of Different Zinc Application Methodsmentioning

confidence: 99%

“…Besides human nutrition, increases in Zn content of grains also have desirable consequences for seedling vigor. Seedlings from seeds with low Zn content are very susceptible to various soil-borne and other pathogens and, thus, to winter-kill (Graham and Webb, 1991;Graham and Rengel, 1993). Seed content of Zn is extremely low in Central Anatolia (Table 9).…”

Section: Potential Impactsmentioning

confidence: 99%

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Zinc deficiency as a practical problem in plant and human nutrition in Turkey: A NATO-science for stability project

Çakmak¹,

Kalaycı²,

Ekiz³

et al. 1999

Field Crops Research

279

152

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Zinc (Zn) de®ciency is a critical nutritional problem for plants and humans in Turkey. About 14 Mha of cropped land in Turkey are known to be Zn de®cient, particularly cereal growing areas of Anatolia. In 1993, a joint research project was started in Turkey with the ®nancial support of the NATO-Science for Stability Programme to select and characterize cereal genotypes with high yield and/or high Zn accumulation in grain under de®cient supply of Zn.Field, greenhouse and growth chamber experiments were carried to study morphological, physiological and genetic factors determining the bases of genotypical differences in Zn ef®ciency among cereal species and within cultivars of wheat. Among the cereals, rye had particularly high Zn ef®ciency (high yield under Zn de®ciency). There were large genotypical differences among wheat lines. High Zn ef®ciency was closely associated with enhanced capacity of some lines to take up Zn from soils, but not with increased Zn accumulation per unit dry weight of shoot or grain. Measurement of Zn-containing superoxide dismutase activity in leaves revealed that an ef®cient utilization of Zn at the tissue or cellular level is an additional major factor involved in Zn ef®ciency of cereals.Zinc present in grains from Anatolia seems to be not bioavailable. Phytate : Zn molar ratios in grains, a widely accepted predictor of Zn bioavailability, were extremely high and ranged between 95 and 216 for crops grown severely on Zn-de®cient soils of Central Anatolia. In the studies concerning determination of Zn nutritional status of school children in Southeastern Anatolia, most children were found to be of shorter stature and had very low levels of Zn (<100 mg kg À1 ) in hair. #

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Section: Effectiveness Of Different Zinc Application Methodsmentioning

confidence: 99%

Section: Potential Impactsmentioning

confidence: 99%

Zinc deficiency as a practical problem in plant and human nutrition in Turkey: A NATO-science for stability project

Çakmak¹,

Kalaycı²,

Ekiz³

et al. 1999

Field Crops Research

279

152

View full text Add to dashboard Cite

show abstract

“…Zn efficiency, defined as the ability of a plant to grow and yield well in Zn-deficient soils, varies among wheat cultivars (Graham and Rengel, 1993). In field trials, durum wheat cultivars have been shown to be consistently less Zn efficient than bread wheat (Triticum aestivum L.) cultivars (Graham et al, 1992).…”

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confidence: 99%

Characterization of Zinc Uptake, Binding, and Translocation in Intact Seedlings of Bread and Durum Wheat Cultivars

et al. 1998

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Durum wheat (Triticum turgidum L. var durum) cultivars exhibit lower Zn efficiency than comparable bread wheat (Triticum aestivum L.) cultivars. To understand the physiological mechanism(s) that confers Zn efficiency, this study used 65 Zn to investigate ionic Zn 2؉ root uptake, binding, and translocation to shoots in seedlings of bread and durum wheat cultivars. Time-dependent Zn 2؉ accumulation during 90 min was greater in roots of the bread wheat cultivar. Zn 2؉ cell wall binding was not different in the two cultivars. In each cultivar, concentration-dependent Zn 2؉ influx was characterized by a smooth, saturating curve, suggesting a carriermediated uptake system. At very low solution Zn 2؉ activities, Zn 2؉ uptake rates were higher in the bread wheat cultivar. As a result, the Michaelis constant for Zn 2؉ uptake was lower in the bread wheat cultivar (2.3 M) than in the durum wheat cultivar (3.9 M). Low temperature decreased the rate of Zn 2؉ influx, suggesting that metabolism plays a role in Zn 2؉ uptake. Ca inhibited Zn 2؉ uptake equally in both cultivars. Translocation of Zn to shoots was greater in the bread wheat cultivar, reflecting the higher root uptake rates. The study suggests that lower root Zn 2؉ uptake rates may contribute to reduced Zn efficiency in durum wheat varieties under Zn-limiting conditions.

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“…Cakmak et al [33] reported that Zn efficiency in cereal is mainly related to the difference in the acquisition of Zn by the roots. Graham and Rengel [34] reported that plant species vary significantly in response to micronutrient deficiency; some are able to cope with low micronutrient availability, and thus, grow well even when other species or cultivars suffer from reduced yield due to micronutrient deficiency.…”

Section: Discussionmentioning

confidence: 99%

Towards Zinc Biofortification in Chickpea: Performance of Chickpea Cultivars in Response to Soil Zinc Application

et al. 2017

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A field experiment was conducted at three locations in the southern region of Ethiopia during the 2012 and 2013 cropping seasons to evaluate chickpea cultivars for their response to soil zinc application, including agronomic performance, grain yield, grain zinc concentration, zinc and agronomic efficiency. Fifteen chickpea cultivars were evaluated in a randomized complete block design with three replications at each location and year. The highest number of pods (237) plant −1 was obtained from Butajira local landrace. The cultivar Naatolii produced the highest grain yield (2895 kg·ha −1 ), while the breeding line FLIP03-53C had the lowest yield (1700 kg·ha −1 ). The highest zinc concentrations of 47.5, 47.4, and 46.4 mg·kg −1 grain were obtained from the cultivar Arerti, and the two breeding lines FLIP07-27C and FLIP08-60C, respectively. The highest zinc efficiency (88%) was obtained from the Wolayita local landrace, whereas the highest agronomic efficiency of 68.4 kg yield increase kg −1 zinc application was obtained from the cultivar Naatolii. The current research identified chickpea cultivars with high grain zinc concentration, zinc efficiency, agronomic efficiency, and grain yield. The identification of cultivars with high grain zinc concentration allows the use of chickpea as a potential alternative to help to correct zinc deficiency, which is highly prevalent in the population of the region.

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Genotypic Variation in Zinc Uptake and Utilization by Plants

Cited by 168 publications

References 36 publications

Zinc deficiency as a practical problem in plant and human nutrition in Turkey: A NATO-science for stability project

Zinc deficiency as a practical problem in plant and human nutrition in Turkey: A NATO-science for stability project

Characterization of Zinc Uptake, Binding, and Translocation in Intact Seedlings of Bread and Durum Wheat Cultivars

Towards Zinc Biofortification in Chickpea: Performance of Chickpea Cultivars in Response to Soil Zinc Application

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