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Joseph P. Albano

.e., photodegradation) when complexed with Fe. Iron chelates of EDTA and DTPA are also vulnerable to photodegradation. Photodegradation of FeDTPA or FeEDTA occurs in fertilizers, resulting in the loss of soluble (i.e., plant available) Fe. Photodegradation of FeEDTA

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Ritu Dhir, Richard L. Harkess, and Guihong Bi

, expand less, and cup upward. This physiological disorder is referred to as “bleaching.” Plants may resume developing green leaves when the temperatures moderate. Observational evidence indicated that applying Fe-chelate before bleaching helped reduce the

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Charalambos I. Siminis and Manolis N. Stavrakakis

(III) to the bioavailable ferrous form [Fe(II)] is required before the transmembrane import of iron ( Marschner and Römheld, 1994 ). In strategy II plants (graminaceous species), soil Fe(III) is chelated and transferred by the plant

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Bruce W. Wood

glyphosate ( Yamada et al., 2009 ). Iron fertilizers are typically “chelates” that bind Fe 3+ (ferric, or oxidized Fe). A common form is Fe-DPTA. Iron (Fe 3+ ) chelates bind to the cytoplasmic plasmalemma, where, in dicots, sequestered Fe 3+ is chemically

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Monica Ozores-Hampton

) production leading to higher bicarbonate formation and ultimately Fe fixation. Soluble organic complexes from organic matter such as cover crops, compost, or animal manure application react with Fe in the soil solution, creating natural chelates resulting in

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Joseph P. Albano and Donald J. Merhaut

Most soluble fertilizers used in floral crop production are formulated with micronutrient metals Cu, Fe, Mn, and/or Zn complexed with synthetic APCA complexones, known commonly as chelating agents like EDTA, DTPA, and EDDHA. These compounds are used

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Miguel Urrestarazu, Juan E. Alvaro, Soraya Moreno, and Gilda Carrasco

The use of synthetic iron (Fe) chelates in fertigation is the most common method to alleviate iron deficiency in crops. Several factors that determine the effectiveness of Fe chelates have been described such as the dosage applied and how theses

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Joseph P. Albano

Soluble fertilizers are typically formulated with metal-aminopolycarboxylic acids [APCA (i.e., chelating agents)] of Cu, Fe, Mn, and Zn. These metal–APCA complexes, however, are also applied as single-metal chelate solutions to foliage, soil

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Eva Bacaicoa, Ángel María Zamarreño, Diane Leménager, Roberto Baigorri, and José María García-Mina

specific chelating agents, named phytosiderophores, capable of complexing Fe and other micronutrients, and on the production of Fe-phytosiderophore transporters to absorb them into the root system ( Kawai and Alam, 2006 ). Split-root assays show that

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Brandon R. Smith and Lailiang Cheng

moisture and low soil temperature ( Davenport and Stevens, 2006 ). When Fe is limiting, dicotyledons can facilitate Fe uptake by acidifying the rhizosphere to increase Fe solubility and exuding organic acids and phenolics to chelate Fe ( de Vos et al