The Relation between Iron and Chlorophyll Contents in Chlorotic Sunflower Leaves

Jacobson, Louis; Oertli, J. J.

doi:10.1104/pp.31.3.199

Cited by 64 publications

(26 citation statements)

References 11 publications

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“…Attention has focused on chlorosis, which has frequently been ascribed to iron immobilization or inactivation rather than to iron deficiency (5,6,30,31,32). However, recent evidence shows a clear relationship between total iron content and chlorophyll content (2,20,21,29). Previous evidence to the contrary can often be explained as a failure to wash leaves prior to analysis (20), or a failure to maintain a constant supply of iron (21).…”

mentioning

confidence: 79%

Iron Transport in Pea Plants

Branton¹,

Jacobson

1962

Plant Physiol.

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mentioning

confidence: 79%

Iron Transport in Pea Plants

Branton¹,

Jacobson

1962

Plant Physiol.

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“…In the present study, iron was supplied to sunflower roots, and exudates were used to sample translocated ironi. The quantities of iron inivolvedl in other phases (root absorption and accumulation ) have been coInsi(lere(l mostly in relation to translocation.Restorati,on of iron to plants precul,tured at different ironi levels resu;lts in wide variations of this nietal in the leaves (8,14) and stemii exudates (3,14, 15). \NVhen iron is supplied as a synthetic chelate, the roots of sutf'lower (13) and soybean (14) absorb the metal but leave Imlost of the chelating agent in the nutrient rediuni.…”

mentioning

confidence: 99%

“…Restorati,on of iron to plants precul,tured at different ironi levels resu;lts in wide variations of this nietal in the leaves (8,14) and stemii exudates (3,14,15). \NVhen iron is supplied as a synthetic chelate, the roots of sutf'lower (13) and soybean (14) absorb the metal but leave Imlost of the chelating agent in the nutrient rediuni.…”

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confidence: 99%

Iron Translocation I. Plant Culture, Exudate Sampling, Iron-Citrate Analysis

Tiffin

1966

Plant Physiol.

135

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,S11 oiIiiiNV. Plant culture. exudlate sami-pling, all(l analytical metlho(ds designle(d to ascertaim the formi of iron translocated are presented.Restorati,on of ireni to sunifloxwer plants precultured at (liffereint Fe levels resulted in exu(late iroin conicenitratioils raliginig fromil 0.2 to 31 X 10-°Nt. Citrate was froml1 3 to 89 X 10 0--WI. Iron and citrate were highest in exudates from iron-leficient plants. In the present study, iron was supplied to sunflower roots, and exudates were used to sample translocated ironi. The quantities of iron inivolvedl in other phases (root absorption and accumulation ) have been coInsi(lere(l mostly in relation to translocation.Restorati,on of iron to plants precul,tured at different ironi levels resu;lts in wide variations of this nietal in the leaves (8,14) and stemii exudates (3,14, 15). \NVhen iron is supplied as a synthetic chelate, the roots of sutf'lower (13) and soybean (14) absorb the metal but leave Imlost of the chelating agent in the nutrient rediuni.In the present study, sunflower plants precultured at different iron levels were given similar treatments at (lecapitatioin. Assays were carried out to determine quanitities of citrate and iron in the exudates. The primary objective was to determine the form of iron translocated. A brief report of this work is published (11).In later experiments ( 12) the iron treatments were reversed. Planits were preculture(d similarly but given (lifferent iron levels at decapitation. The purpose was to (letermine the effect of iron supplied in the exudlation period on the citrate and iron content of the exudates. Attention has also been given to the changes in conicentrationi of citrate and(I iron that occtir (luring exudationi. Materials and MethodsA-iutr-ienit S'olutioui. h'lle stan(lardl niutrienit wvas a modified Steinberg solution (10. 14). Elements were approximately onie-fifth the Steinberg conicentratioll. excelpt for lower phosphorus. TI'he nutrienit conitaine(l (mn.g/li-ter') 51 Ca. 6.6 Mig. 59

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“…Iron has a role in thylakoid lipid composition. Beside this, iron is directly or indirectly involved in the production of chlorophyll and deficiency of iron irreversibly damages chlorophyll synthesis (Jacobson and Oertli 1956). The common precursor for chlorophyll and heme synthesis is δ-aminolevulinic acid (ALA) and the rate of ALA formation For each measurement corresponding mean±standard error (n03) followed by the same letter are not significant at P≤0.05 Table 3 Recovery of nutritional status (physiologically active iron and total iron content) in the leaves of low-chill peach cultivars 7 days after foliar fertilization of different iron sources…”

Section: Discussionmentioning

confidence: 99%

Physiological and biochemical adjustment of iron chlorosis affected low-chill peach cultivars supplied with different iron sources

Chakraborty

Singh

Shukla

et al. 2012

Physiol Mol Biol Plants

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A pot experiment was carried out to investigate the effect of iron supplementation on physiological and biochemical status of the low-chill peach cultivars (Saharanpur Prabhat, Shan-e-Punjab and Pratap) suffered from iron chlorosis in artificially created calcareous soil. Three most commonly used iron sources viz. Fe-sulphate (1.0 % and 0.5 %), Fe-citrate (1.0 % and 0.5 %) and FeEDTA (0.1 % and 0.2 %) were sprayed on the 4th and 5th leaves from the apex of the twig. And after 1 week of spraying, observation on various physiological and biochemical parameters in leaves were recorded. Improvement in plant physiological parameters like chlorophyll content index (CCI), photosynthetic rate (P n ), stomatal conductance (g s ) and intercellular CO 2 conc. (C i ) were recorded best with the application of 1.0 % Fe-sulphate both in treated and untreated upper leaves. The maximum recovery in biochemical parameters such as total leaf chlorophyll content, superoxide dismutase (SOD) and peroxidase (POD) activity was also noted with the application of 1.0 % Fe-sulphate. However, application of 1.0 % Fe-sulphate and 0.5 % Fesulphate had similar effect for most of the parameters under study. The ability of iron sources to induce physiological and biochemical responses in iron deficient low-chill peach plants were in the following order Fe-sulphate>Fe-citrate>FeEDTA. Differential responses in plant physiological and biochemical parameters were also exhibited by the low-chill peach cultivars with regard to supplementation of various iron sources. Among the low-chill peach cultivars, Saharanpur Prabhat responded best with the application of iron sources followed by Shan-e-Punjab and Pratap.

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The Relation between Iron and Chlorophyll Contents in Chlorotic Sunflower Leaves

Cited by 64 publications

References 11 publications

Iron Transport in Pea Plants

Iron Transport in Pea Plants

Iron Translocation I. Plant Culture, Exudate Sampling, Iron-Citrate Analysis

Physiological and biochemical adjustment of iron chlorosis affected low-chill peach cultivars supplied with different iron sources

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