Occurrence of physiologically inactive zinc in maize on a black earth soil

Leece, D. R.

doi:10.1007/bf00015903

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…This is reasonable because many of the studies which have demonstrated an increased P uptake were with media extremely high or low in P and Zn (Leece, 1976;Loneragan et al, 1982). The use of less buffered media, such as sand or solution culture, may also contribute to the difference found in this study, because in these media it is possible to maintain solution concentrations at artificially high or low levels.…”

Section: Discussionmentioning

confidence: 70%

“…Cakmak and Marschner (1986) found that Zn deficiency resulting from high P concentration did not affect tissue Mn, Fe, or Cu concentrations. Others (Graham et al, 1987;Leece, 1976;Safaya, 1976) found that Mn and Cu, and occasionally Fe, were elevated in the tissue of Zn deficient plants. In assessing Zn deficiencies, Cakmak and Marschner (1986) reported that a water extractable tissue Zn was a better diagnostic tool than a total Zn.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast total Zn includes both bound and water soluble fractions. Leece (1976) suggested that because of Zn inactiviation in plant tissue, a total digest Zn is not well correlated with deficiency symptoms.…”

Section: Introductionmentioning

confidence: 99%

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Zinc uptake by corn as affected by vesicular-arbuscular mycorrhizae

et al. 1990

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Pot-grown mycorrhizal and non-mycorrhizal sweet corn were grown in a low Zn soil. All treatments received a complete nutrient solution with or without Zn. Treatments were harvested sequentially to detemine temporal mycorrhizal effects on: (a) tissue and water soluble Zn and (b) differential uptake of P and Zn. Plants grown with supplemental Zn had greater growth and Zn tissue concentration than those not receiving Zn. With no supplemental Zn, mycorrhizal treatments had greater growth and Zn concentration than non-mycorrhizal treatments. There was no indication of nutrient interaction between Zn and P. Over the range of tissue Zn found, there appeared to be no advantage to water soluble Zn analysis over total Zn in assessing plant Zn status.

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Section: Discussionmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

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Zinc uptake by corn as affected by vesicular-arbuscular mycorrhizae

et al. 1990

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Diagnosis of zinc deficiency in cotton

Ghoneim¹,

Bussler²

1980

J Plant Nutrition & Soil

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The diagnosis of Zn deficiency in cotton by means of total analysis or the appearance of deficiency symptoms is unsatisfactory. In order to obtain a better understanding of the development of Zn deficiency symptoms in relation to Zn content cotton plants were cultivated in waterculture under reproducible environmental conditions and Zn deficiency induced by different means.It was observed that deficiency symptoms developed equally, regardless of the inducing factors such as low Zn in the nutrient solution, high nutrient solution pH, high Ca and high Fe supply. High amounts of P in the nutrient solution did not induce Zn deficiency symptoms. Z n deficiency symptoms appeared first as interveinal chlorosis in the medium-aged leaves. The internodes remained short. Later red spots appeared on the leaf blades. The leaves suffering from deficiency were thicker because of enlarged palisade cells.The total Zn content of the leaves did not correlate with the symptoms. Different fractions of the Zn in the leaf (extractable with water, NaCl solution, hydrochloric acid) gave no better results. The analytically determined and calculated Zn fractions are discussed in relation to Zn deficiency inducing conditions.

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Estimation of physiologically active zinc in maize by biochemical assay

Gibson¹,

Leece²

1981

Plant Soil

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The enzymes ribonuclease, aldolase and carbonic anhydrase were evaluated as biochemical assays for physiologically active zinc in maize. Seedlings were cultured for 14 or 30 days on a black-earth soil with factorial combinations of phosphorus and zinc fertilizers so as to produce in the leaves varying levels of active zinc at a constant level of total zinc. Enzyme activity was correlated with plant growth, leaf nutrient composition and the occurrence of visual symptoms of zinc deficiency.Ribonuclease and aldolase activities in leaf tissues were insensitive to the changes in active zinc concentration, though aldolase activity was sensitive to phosphorus deficiency. In contrast, leaf carbonic anhydrase activity correlated well with the onset and correction of zinc deficiency symptoms and, as early as 14 days after emergence, was more sensitive to the deficiency than was plant growth.The sensitivity of carbonic anhydrase to changes in active zinc and its specificity for such changes were further examined in 10 to 30 day-old plants grown in solution culture. Zinc was added to plants which had been cultured without zinc for 16 days. A 2.5-fold increase in carbonic anhydrase activity preceded responses by either zinc concentration or plant growth.We propose the use of leaf carbonic anhydrase as an index of active zinc in maize, particularly to supplement inorganic analysis in the diagnosis of zinc deficiency when much of the zinc in the plants is inactive. The assay is simple, is sensitive to and specific for zinc status, and enables early detection of a deficiency before irreversible biochemical events predispose a large yield reduction. 395Plant and Soil 63, 395-406 (1981).

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Occurrence of physiologically inactive zinc in maize on a black earth soil

Cited by 4 publications

References 12 publications

Zinc uptake by corn as affected by vesicular-arbuscular mycorrhizae

Zinc uptake by corn as affected by vesicular-arbuscular mycorrhizae

Diagnosis of zinc deficiency in cotton

Estimation of physiologically active zinc in maize by biochemical assay

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