Iron chlorosis, a world wide problem, the relation of chlorophyll biosynthesis to iron

Miller, Gene W.; Pushnik, James C.; Welkie, George W.

doi:10.1080/01904168409363172

Cited by 126 publications

(48 citation statements)

References 61 publications

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“…Interestingly, the concern for the role of iron as a major factor in oceanic production has grown parallel to similarly mounting evidence for the importance of iron as a nutrient often limiting the production of angiosperms on land (e.g. Miller et al 1984). Whether iron deficiency may be an important factor limiting angiosperm productivity in the sea has not been, however, examined to date.…”

mentioning

confidence: 99%

Evidence of iron deficiency in seagrasses growing above carbonate sediments

Duarte

Merino²,

Margarita

1995

Limnology & Oceanography

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A comparison of available data on iron concentration in seagrass tissues shows iron concentrations in seagrass leaves growing on carbonate sediments to be below critical levels for angiosperms [< 100 µg Fe (g DW)− 1]. Iron concentrations of leaves in Caribbean seagrasses declined by 5–10‐fold from terrigenous to carbonate sediments (inner Gulf of Mexico to the Caribbean coast off the Yucatan Peninsula). This observation provided evidence of possible iron deficiency in seagrasses, which was confirmed by an experimental demonstration that adding iron to the sediments stimulates growth of the Caribbean seagrass Thalassia testudinum and increases the chlorophyll a concentration of both T. testudinum and Syringodium filiforme growing above coralline carbonate sediments. We conclude that seagrasses growing above carbonate sediments are likely to experience iron deficiency.

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confidence: 99%

Evidence of iron deficiency in seagrasses growing above carbonate sediments

Duarte

Merino²,

Margarita

1995

Limnology & Oceanography

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“…Chlorophyll measurement is a commonly used approach to estimate N status in plants [22]. However, Mg [23] and Fe [24] deficiencies may also cause low chlorophyll levels since they are involved in chlorophyll biosynthesis. Therefore, high transmittance values of red light may also be obtained from Mg or Fe deficient plants, leading to erroneous diagnosis.…”

Section: Resultsmentioning

confidence: 99%

Fast estimation of chlorophyll content on plant leaves using the light sensor of a smartphone

Pineda-Tobón¹,

Pérez²,

Gaviria-Palacio³

et al. 2017

DYNA

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Plant chlorophyll measurements can support nitrogen fertilization decisions. Using a 3D printed device and a red LED, here we tested the feasibility of using a smartphone ambient light sensor (ALS) to estimate leaf chlorophyll by light transmission. Its performance was evaluated by comparing 30 leaf sorghum (Sorghum bicolor (L.) Moench) transmission readings of the red LED (663 nm) obtained from the smartphone and a standard spectrometer, which showed a good coefficient of determination (r 2 = 0.9067). Additionally, a comparison between the ALS and a SPAD 502 TM (a commercial device for chlorophyll content estimation) was made with chrysanthemum (Dendranthema grandiflora Tzvelev) leaves, obtaining a good correlation between both measurements. Light transmission was also measured in S. bicolor flag leaves from plants growing in the greenhouse under increasing nitrogen fertilization. A clear fit between leaf light transmission and plant height was also observed, suggesting a simple, smartphone based estimation of plant's chlorophyll.Keywords: Plant nutrition; non-destructive chlorophyll meter; leaf light transmittance.Estimación rápida del contenido de clorofila en hojas usando el sensor de luz de un teléfono celular ResumenMedir clorofila puede apoyar decisiones de fertilización nitrogenada de plantas. Usando un dispositivo impreso en 3D y un LED rojo, aquí probamos la factibilidad de usar un teléfono celular para estimar clorofila por transmisión de luz. Al comparar 30 lecturas de trasmisión de luz roja (663 nm) por hojas de sorgo Sorghum bicolor (L.) Moench, obtenidas del teléfono y de un espectrómetro estándar, se encontró un buen coeficiente de determinación (r 2 = 0.9067). Adicionalmente, se hizo una comparación entre las lecturas del teléfono y un SPAD 502 TM (un dispositivo comercial para la estimación del contenido de clorofila) en hojas de crisantemo Dendranthema grandiflora Tzvelev, obteniendo una buena correlación entre ambas medidas. La transmisión medida en hojas de S. bicolor de plantas de invernadero fertilizadas con nitrógeno también presentó buen ajuste con la altura de las plantas, sugiriendo la posibilidad de estimar fácilmente el contenido de clorofila en hojas usando teléfonos inteligentes.Palabras clave: Nutrición vegetal; medición no destructiva de clorofila; transmisión de luz por hojas.

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“…Limeinduced chlorosis results from iron deficiency (Brown & Holmes, 1955;Wallace, 1956) Symptoms of this malady are similar to those of iron deficiency in water culture, at least with respect to disturbances in the chloroplast ultrastructure (Ostrovskaya, Silaeva & Shiryaev, 1966). Iron chlorosis and limeinduced chlorosis are generally used synonymously (Miller, Pushnik & Welkie, 1984).…”

Section: Introductionmentioning

confidence: 99%

Superoxide dismutase activation in response to lime‐induced chlorosis

Ostrovskaya¹,

Truch²,

Mikhailik³

1990

New Phytologist

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Alterations in superoxide dismutase (SOD) activity were studied on chlorotic grapevines (Vitis vitufera L.) grown under natural conditions on soil containing 30-35 "" CaCOj and in lupins (Lupiniis luteus L.) grown in a greenhouse with addition of 20",, CaCOg to the soil. In both series of experiments SOD activity in leaves of chlorotic plants was from 20 to 30 ",, higher. The efficiency and absolute rate of superoxide anion radical formation were found to rise as a result of iron deficiency in the lupin leaves. Increased SOD activity and greater amounts of enzyme isoforms were observed in the leaves of grapevine cultivars resistant to lime-induced chlorosis as compared to less resistant cultivars. The present investigation suggests that initiation of lime-induced chlorosis is determined not only by reduced chlorophyll biosynthesis but also by other consequencies of iron deficiency in tissues, particularly by the high rate of formation of superoxide and other activated oxygen speeies, causing destructive changes in the photosynthetie apparatus. The increased SOD activity may be regarded as a protective mechanism against the formation of superoxide.

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Iron chlorosis, a world wide problem, the relation of chlorophyll biosynthesis to iron

Cited by 126 publications

References 61 publications

Evidence of iron deficiency in seagrasses growing above carbonate sediments

Evidence of iron deficiency in seagrasses growing above carbonate sediments

Fast estimation of chlorophyll content on plant leaves using the light sensor of a smartphone

Superoxide dismutase activation in response to lime‐induced chlorosis

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