Effects of Chemical Treatments upon Photosynthetic Parameters in Soybean Seedlings

Manning, David T.; Chen, Tsong Meng; Campbell, Andrew; Tolbert, N. E.; Smith, E. L.

doi:10.1104/pp.76.4.1055

Cited by 2 publications

(1 citation statement)

References 22 publications

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“…Rhodanine represents an important scaffold in drug discovery [ 5 ], and the influence of its derivatives on plant physiology has been well documented, too [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. 5-Arylalkylidenerhodanines [ 7 ] and 3-arylrhodanines [ 9 ] were patented as potential herbicides, and 5-(5-barbiturilidene)rhodanine inhibited growth of algae in water at relatively low concentrations [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of (Z)-5-Arylmethylidene-rhodanines with Photosynthesis-Inhibiting Properties

et al. 2011

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A series of rhodanine derivatives was prepared. The synthetic approach, analytical and spectroscopic data of all synthesized compounds are presented. Lipophilicity of all the discussed rhodanine derivatives was analyzed using the RP-HPLC method. The compounds were tested for their ability to inhibit photosynthetic electron transport (PET) in spinach (Spinacia oleracea L.) chloroplasts and reduce chlorophyll content in freshwater alga Chlorella vulgaris. Structure-activity relationships between the chemical structure, physical properties and biological activities of the evaluated compounds are discussed. For majority of the tested compounds the lipophilicity of the compound and not electronic properties of the R1 substituent were decisive for PET-inhibiting activity. The most potent PET inhibitor was (5Z)-5-(4-bromobenzylidene)-2-thioxo-1,3-thiazolidin-4-one (IC50 = 3.0 μmol/L) and the highest antialgal activity was exhibited by (5Z)-5-(4-chlorobenzylidene)-2-thioxo-1,3-thiazolidin-4-one (IC50 = 1.3 μmol/L).

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of (Z)-5-Arylmethylidene-rhodanines with Photosynthesis-Inhibiting Properties

et al. 2011

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Detection of Chemicals Inhibiting Photorespiratory Senescence in a Large Scale Survival Chamber

Manning¹,

Campbell²,

Chen³

et al. 1984

Plant Physiol.

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Spray applications of 3.49 millimolar 2-(4-chlorophenoxy)-2-methylpropanoic acid (CPMP) significantly decreased leaf chlorophyll loss, compared with the control, after 72 hours of subcompensation-point stress. Treatment with CPMP also consistently increased leafchlorophyll per unit area under nonstress greenhouse conditions. These effects may be due to increases in specific leaf weight produced by CPMP although the compound did not consistently act as a height retardant. The compound, 3-butyl-2-hydroxy4H-pyridoll,2-alpyrimidin4-one (BHPP), inhibited senescence under low CO2 conditions but did not decrease leaf light transmission at ambient CO2 levels. The cytokinin N'-benzyladenine (BA) retarded low CO2 stress senescence although greening effects were not observed. Neither 2-hydroxy-3-butynoic acid (HBA) nor its butyl ester, inhibitors of glycolate oxidase, influenced low CO2 survival. Cyclohexanecarboxylic acid (CHCA) and sodium naphthenate had no effect upon subcompensation-point senescence.Antisenescence effects of CPMP, BHPP, and BA do not appear to be directly attributable to effects upon the competing carbon paths of photosynthesis and photorespiration. Protection against low CO2 stress and increased chlorophyll synthesis under nonstress conditions may represent separate effects upon plastids by some of the compounds. This screen will identify compounds which inhibit photorespiratory senescence without decreasing the CO2 compensation point. (21) provided HBA. The nuclear magnetic resonance and IR absorption spectra of all of the above compounds were in agreement with the published data and confirmed the assigned structures.Cyclohexanecarboxylic acid (CHCA) and N6-benzyladenine (BA) were purchased from the Aldrich Chemical Co., Inc. and 3 Abbreviations: CPMP, 2-(4-chlorophenoxy)-2-methylpropanoic acid; BHPP, 3-butyl-2-hydroxy4H-pyrido[1,2-a]pyrimidin-4-one; BHB, butyl 2-hydroxy-3-butynoate; HBA, 2-hydroxy-3-butynoic acid; CHCA, cyclohexanecarboxylic acid; NaNAP, sodium naphthenate; T, transmission value; SLW, specific leaf weight; r, C02 compensation concentration.4 CPMP(2-(4-chlorophenoxy)-2-methylpropanoic acid) has been generally referred to as p-chlorophenoxyisobutyrate or CPIB in publications dealing with its effect upon animal peroxisomes and with its hypolipidemic activity.

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Effects of Chemical Treatments upon Photosynthetic Parameters in Soybean Seedlings

Abstract: ABSTRACT

Cited by 2 publications

References 22 publications

Synthesis and Characterization of (Z)-5-Arylmethylidene-rhodanines with Photosynthesis-Inhibiting Properties

Synthesis and Characterization of (Z)-5-Arylmethylidene-rhodanines with Photosynthesis-Inhibiting Properties

Detection of Chemicals Inhibiting Photorespiratory Senescence in a Large Scale Survival Chamber

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