Iron Deficiency Chlorosis

Korcak, R. F.

doi:10.1002/9781118060827.ch5

Cited by 27 publications

(27 citation statements)

References 189 publications

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“…Our leaf Fe concentrations were generally higher than those reported by Fernández-Escobar et al [41]. Nevertheless, leaf Fe analysis is generally not useful for diagnosing Fe deficiency because the inconsistency of leaf Fe levels in separating chlorotic from nonchlorotic leaves [45], relying on visual leaf assessment, remains the most reliable Our generally low soil and leaf macronutrient values can be attributed to the fact that olive trees in this part of Syria, like most Mediterranean olive growing regions, are usually grown on poor, hilly, and shallow soils. In addition, traditional no input or low input production systems do not compensate for crop nutrient uptake.…”

Section: Nutrient Deficienciescontrasting

confidence: 54%

Modelling the Effects of Soil Conditions on Olive Productivity in Mediterranean Hilly Areas

Tubeileh

Turkelboom

Al-Ibrahem

et al. 2014

International Journal of Agronomy

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The majority of olive (Olea europaea L.) production in Mediterranean environments is characterized by low external inputs and is practiced in hilly areas with shallow soils. This study aimed to study the yield and nutritional status for olive (cv. "Zeiti") trees in northwestern Syria and establish correlations between yield, on the one hand, and soil/land factors and tree nutrition, on the other hand, to determine the most yield-affecting factors. Land and soil fertility parameters (field slope, soil depth, and soil nutrients) and concentrations of leaf minerals were determined. As olive roots can go deep in the soil profile to extract nutrients, the total available nutrients per tree (over the whole profile) were estimated. Multiple regression analyses were performed to determine the model that best accounts for yield variability. Total available soil potassium amount ( 2 = 0.68), soil total N amount ( 2 = 0.59), and soil depth ( 2 = 0.56) had the highest correlations with olive fruit yields. Available soil potassium amount and soil depth explained together 77% of the yield variability observed. In addition to these two factors, adding leaf B and Fe concentrations to the model increased the variability explained to 83%. This paper is dedicated to the good memory of Mr. Malek Abdeen.

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Section: Nutrient Deficienciescontrasting

confidence: 54%

Modelling the Effects of Soil Conditions on Olive Productivity in Mediterranean Hilly Areas

Tubeileh

Turkelboom

Al-Ibrahem

et al. 2014

International Journal of Agronomy

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“…This deficiency is characterized by interveinal yellowing of the youngest leaves by effect of poor Fe redistribution in chlorotic plants (Korcak 1987). Olive (Olea europaea L.) additionally exhibits shorter internodes and shoots with few, short leaves in cases of severe Fe chlorosis.…”

Section: Introductionmentioning

confidence: 99%

Intercropping with grasses helps to reduce iron chlorosis in olive

Cañasveras¹,

Campillo²,

Barrón³

et al. 2014

J. Soil Sci. Plant Nutr.

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Grasses are more efficient than dicots in acquiring Fe from calcareous soils. We studied whether intercropping with grasses alleviates Fe chlorosis in olive and whether the effect persists in succeeding dicot crops. Three different pot experiments were conducted. In the first, olive plants were intercropped with 6 different grass species (purple false brome, annual ryegrass, compact brome, goatgrass, barley and red fescue); in the second, the two species best performing in the previous experiment were studied in various calcareous soils and; in the third, chickpea and peanut were grown in pots previously used to cultivate the two grasses. Intercropping with purple false brome and barley increased leaf chlorophyll concentrations and/or boosted growth of olive trees on three different calcareous soils. Olive growth was adversely affected by intercropping in one soil as a result of competition for water. Intercropping increased Fe, Mn, Cu and Zn leaf contents in olive. Also, grass cropping generally raised available levels of soil Fe, Mn, Cu and Zn; this effect, however, resulted in no substantial alleviation of Fe chlorosis in succeeding chickpea or peanut crops. Intercropping with purple false brome and barley appears to be a promising remedy for Fe chlorosis in olive orchards affected by Fe chlorosis.

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“…Some of these conditions are particularly frequent in calcareous soils, abundant in arid and semi-arid regions, in which the appearance of Fe chlorosis (internervial yellowing of young leaves due to a lack of chlorophyll) is one of the main problems [7]. Fe has low mobility in the phloem and barely translocates from the old tissues to the growing tissues and/or organs [1,8,9]. Therefore, the first visible symptoms of Fe deficiency occur in young leaves, while the older leaves remain green.…”

Section: Fe and P Nutrition In Dicot Plantsmentioning

confidence: 99%

Similarities and Differences in the Acquisition of Fe and P by Dicot Plants

et al. 2018

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This review deals with two essential plant mineral nutrients, iron (Fe) and phosphorus (P); the acquisition of both has important environmental and economic implications. Both elements are abundant in soils but are scarcely available to plants. To prevent deficiency, dicot plants develop physiological and morphological responses in their roots to specifically acquire Fe or P. Hormones and signalling substances, like ethylene, auxin and nitric oxide (NO), are involved in the activation of nutrient-deficiency responses. The existence of common inducers suggests that they must act in conjunction with nutrient-specific signals in order to develop nutrient-specific deficiency responses. There is evidence suggesting that P-or Fe-related phloem signals could interact with ethylene and NO to confer specificity to the responses to Fe-or P-deficiency, avoiding their induction when ethylene and NO increase due to other nutrient deficiency or stress. The mechanisms responsible for such interaction are not clearly determined, and thus, the regulatory networks that allow or prevent cross talk between P and Fe deficiency responses remain obscure. Here, fragmented information is drawn together to provide a clearer overview of the mechanisms and molecular players involved in the regulation of the responses to Fe or P deficiency and their interactions.

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Iron Deficiency Chlorosis

Cited by 27 publications

References 189 publications

Modelling the Effects of Soil Conditions on Olive Productivity in Mediterranean Hilly Areas

Modelling the Effects of Soil Conditions on Olive Productivity in Mediterranean Hilly Areas

Intercropping with grasses helps to reduce iron chlorosis in olive

Similarities and Differences in the Acquisition of Fe and P by Dicot Plants

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