Diagnosis of zinc deficiency in cotton

Ghoneim, Mohamed F.; Bussler, W.

doi:10.1002/jpln.19801430403

Cited by 8 publications

(6 citation statements)

References 18 publications

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“…This finding indicate that Zn content per shoot, but not Zn concentration per unit of shoot dry weight, is a reliable criterion for assessing genotypes for their tolerance to Zn deficiency, confirming the previous results with genotypes of different cereal species (Graham and Rengel, 1993;Rengel and Graham, 1995b;Cakmak et al, 1997bCakmak et al, , 1998. In most cases, tissue Zn concentration was not considered as a suitable measure for determination of the Zn nutritional status of plants (Ghoneim and Bussler, 1980;Cakmak and Marschner, 1987). Higher Zn content of the Zn-efficient genotypes (Tables 2 and 4) might be a reflection of greater capacity of these genotypes to absorb Zn from soil.…”

Section: Discussionsupporting

confidence: 86%

Differences in shoot growth and zinc concentration of 164 bread wheat genotypes in a zinc‐deficient calcareous soil

Torun

Bozbay

Gültekin

et al. 2000

Journal of Plant Nutrition

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A greenhouse experiment was carried out to study severity of the zinc (Zn) deficiency symptoms on leaves, shoot dry weight and shoot content and concentration of Zn in 164 winter type bread wheat genotypes (Triticunt aestivum L.) grown in a Zn-deficient calcareous soil with (+Zn=10 mg Zn kg -1 soil) and without (-Zn) Zn supply for 45 days. Tolerance of the genotypes to Zn deficiency was ranked based on the relative shoot growth (Zn efficiency ratio), calculated as the ratio of the shoot dry weight produced under Zn deficiency to that produced under adequate Zn supply. There was a substantial difference in genotypic tolerance to Zn deficiency. Among the 164 genotypes, 108 genotypes had severe visible symptoms of Zn deficiency (whitish-brown

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Section: Discussionsupporting

confidence: 86%

Differences in shoot growth and zinc concentration of 164 bread wheat genotypes in a zinc‐deficient calcareous soil

Torun

Bozbay

Gültekin

et al. 2000

Journal of Plant Nutrition

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“…There is some evidence that the water-soluble Zn fraction may be a better predictor of deficiency than total leaf Zn (e.g. Cakmak and Marschner, 1987), but contrary findings have also been reported (Ghoneim and Bussler, 1980). In our experiments, soluble Zn did not follow consistent trends and, except in stem tissue, was always considerably higher than the 5 to 7 mg kg ~ reported to be the minimum for norreal growth (Cakmak and Marschner, 1987).…”

Section: Zinc-phosphorus Interactions In Tomato 173contrasting

confidence: 52%

“…Rahimi and Bussler (1979) and Ghoneim and Bussler (1980) studied Zn responses of a number of crop species, and concluded that 'latent deficiencies' could occur at leaf Zn concentrations as high as 35mgkg ~. There is some evidence that the water-soluble Zn fraction may be a better predictor of deficiency than total leaf Zn (e.g.…”

Section: Zinc-phosphorus Interactions In Tomato 173mentioning

confidence: 99%

Zinc-phosphorus interactions in two cultivars of tomato (Lycopersicon esculentum L.) grown in chelator-buffered nutrient solutions

1992

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Zinc-phosphorus interactions have been frequently studied using a diverse number of crop species, but attainment of reproducible Zn deficiencies, especially severe ones, has been hampered by the use of conventional hydroponic solutions wherein contaminating levels of Zn are often near-adequate for normal growth. We utilized novel, chelator-buffered nutrient solutions for precise imposition of Zn deficiencies. Tomato (Lycopersicon esculentum L. cv. Jackpot or Celebrity) seedlings were grown for 15 to 18 d in nutrient solutions containing 200, 600, or 1200/xM P, and 0 to 91/zM total Zn. Computed free Zn 2÷ activities were buffered at ~< 10 -l°3 M by inclusion of a 100-/zM excess (above the sum of the micronutrient metal concentrations) of the chelator DTPA. At total added Zn = 0, acute Zn deficiency resulted in zero growth after seedling transfer, and plant death prior to termination. Free Zn 2* activities ~< 10-1°6 M resulted in Zn deficiencies ranging from mild to severe, but activities <~ 10-~2 were required to cause hyperaccumulation of shoot P to potentially toxic levels. Despite severe Zn deficiency (i.e. ca. 20% of control growth), tissue Zn levels were usually much higher than the widely reported critical value of 20 mg kg-~, which may be an artifact of the selection of DTPA for buffering free Zn 2÷. Across Zn treatments, increasing solution P depressed growth slightly, especially in Celebrity, but corresponding increases in tissue P (indicative of enhanced P toxicity) or decreases in tissue Zn (P-induced Zn deficiency) were not observed. The depressive effect of P was also not explained by reductions in the water-soluble Zn fraction. Within 40 h, restoration of Zn supply did not ameliorate high leakage rates (as measured by K + efflux) of Zn-deficient roots. Similarly, transfer of Zn-sufficient plants to deficient solutions did not induce leakiness within 40 h. Foliar sprays of ZnSO 4 almost completely corrected both Zn deficiency and membrane leakiness of plants grown in low-Zn solutions. Hence, maintenance of root membrane integrity appears to depend on the overall Zn nutritional status of the plant, and not on the presence of certain free Zn 2÷ levels in the root apoplasm.

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“…Plant analysis has been shown to be an effective method for diagnosis of Zn deficiency. The use of composite plant samples for diagnosis of Zn deficiency was found to be unsuitable or inferior to young mature leaves in soybean (Ohki, 1977), maize (Weir and Miiham, 1978), cotton (Ghoneim and Bussler 1980), tropical legumes (Andrew et al, 1918), subterranean clover (Reuter et al, 1982), and navy bean (Armour et al, 1990).…”

Section: Introductionmentioning

confidence: 99%

Identification of an index tissue to predict zinc status of wheat

Dang¹,

Edwards

Dalal³

et al. 1993

Plant Soil

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The critical concentration of Zn in wheat tissues for the prediction of Zn response and diagnosis of Zn deficiency was examined in a glasshouse experiment with wheat (Triticum aestivum, line QT 4118) grown to anthesis in two Vertisols at Zn application rates of 0, 1.25, 2.5, 5, 10, 15 and 30 kg ha equivalent as ZnSO 4 7H20. The wheat tissues examined were the youngest mature leaf blade (YMB), the leaf immediately below the youngest mature leaf blade (YMB-1), the older leaves, the ear, the stem and the whole tops. The minimum Zn concentration required in a tissue at 0.90 relative yield, referred to as the critical Zn concentration, was determined using the Cate-Nelson graphical and statistical models, the Mitscherlich equation and a two-intersecting straight lines model. The Zn status of wheat was best defined by the Zn concentration in the YMB. Although the critical Zn concentration of the YMB did not vary much with the method of estimation, the Cate-Nelson statistical procedure explained a higher percentage of the variation in Zn concentration in the YMB and relative yield than the Mitscherlich and the two intersecting straight lines models. The critical concentration of Zn in the YMB was 16.0 mg kg 1 dry matter. It is concluded that determination of Zn concentration in the YMB is the best procedure for evaluating the Zn status of wheat plants.

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Diagnosis of zinc deficiency in cotton

Cited by 8 publications

References 18 publications

Differences in shoot growth and zinc concentration of 164 bread wheat genotypes in a zinc‐deficient calcareous soil

Differences in shoot growth and zinc concentration of 164 bread wheat genotypes in a zinc‐deficient calcareous soil

Zinc-phosphorus interactions in two cultivars of tomato (Lycopersicon esculentum L.) grown in chelator-buffered nutrient solutions

Identification of an index tissue to predict zinc status of wheat

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