Controlled Release and Plant-Growth Regulators

Miller, Jocelyn M.; Yahiaoui, Anella

doi:10.1007/978-1-4757-0405-1_5

Cited by 4 publications

(2 citation statements)

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“…PGR) is attached to the polymeric chain by a hydrolysable chemical bond . The plant growth regulator units may either be introduced directly onto the chain, attached to the terminal linkages of the polymeric chain, or attached to the side groups of the main polymeric chain [8,41,54,76] . The latter method of linking the regulator unit to a polymeric chain has been shown to be the most promising since in this case both the content of bioactive compound in the polymer and also the properties of the overall polymeric system may be regulated during synthesis .…”

Section: Phytoactive Polymers : Slow Release Pgr Formulationsmentioning

confidence: 99%

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Polymeric derivatives of plant growth regulators: synthesis and properties

Tsatsakis

Штильман

1994

Plant Growth Regul

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The polymeric formulations of plant growth regulators (PGRs) are high molecular weight systems in which the PGR unit is attached to the polymeric chain by a hydrolysable chemical bond . These polymeric derivatives (esters, ethers, or else) of PGRs are characterised by the ability to release the active compound (PGR) from their solutions (mainly aqueous) in certain conditions . The release of the PGR can be controlled by external factors (pH, temperature, enzymes, solution concentration), and inherent properties of the whole macrosystem chemical structure, such as the type of the hydrolysable bond between PGR unit and the main polymeric chain, the structure of the polymer chain (e .g . molecular weight, level of hydrophilicity, and the content of hydrophobic groups, macromolecular conformation in solution etc .) . These controlled (slow) release PGRs display certain advantages over conventional PGR formulations due to their prolonged action, improved efficiency (e .g . wide range of effective concentrations) greater safety to non-target organisms and the applicators . In addition the ability of altering the solubility level and modifying the aplication form is of considerable interest . The biological activity efficiency of polymeric PGRs has been documented and the relation of this efficiency to the PGR unit hydrolytic release ability has been mentioned . Slow release polymeric PGRs are considered to solve certain problems in agriculture .Abbreviations : PGR = plant growth regulator ; C(S)RF = controlled (slow) release form ; PD = polymeric derivative ; ACC = 1-amino-cyclopropane-l-carboxylic acid ; NAA = 1-naphthylacetic acid ; 2,4-D = 2,4-dichlorophenoxyacetic acid ; IAA = indole-3-acetic acid ; BAP = N6-benzylaminopurine; ABA = abscisic acid; GA = gibberellin ; LMW = low molecular weight; HMW = high molecular weight . 69

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Section: Phytoactive Polymers : Slow Release Pgr Formulationsmentioning

confidence: 99%

“…4,7,22,41,50,63] have been prepared . These principles have been also utilized [8,9,54,70,78] for the modification of PGRs . The polymeric derivatives (PD) of the latter have been referred to, in some reports, as phytoactive polymers [68,71,72,77,81] .…”

Section: Introductionmentioning

confidence: 99%