malic acid/zea mays

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Arbuscular mycorrhiza induced putrescine degradation into γ-aminobutyric acid, malic acid accumulation, and improvement of nitrogen assimilation in roots of water-stressed maize plants.

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Water shortage limits plant growth and development by inducing physiological and metabolic disorders, while arbuscular mycorrhizal (AM) symbiosis can improve plant adaptation to drought stress by altering some metabolic and signaling pathways. In this study, root growth and levels of some

[Illumination Burst of CO2 and carbon dioxide inner reserves in Zea mays].

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When a leaf of maize (Zea mays) is illuminated following a long enough period of darkness (t≃10 min) under pure nitrogen, the oxygen evolution occurs only after a lag time from one to several minutes. During this delay, a burst of CO2 occurs the maximum of which corresponds to the start of oxygen

Influence of the input system (conventional versus organic farming) on metabolite profiles of maize ( Zea mays ) kernels.

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Maize ( Zea mays ) kernels grown conventionally and organically, respectively, were investigated using a gas chromatography/mass spectrometry (GC/MS)-based metabolite profiling methodology. By analysis of three cultivars grown at two locations with different input systems and at a third location

Application of NMR-based metabolomics to the investigation of salt stress in maize (Zea mays).

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BACKGROUND High salinity, caused by either natural (e.g. climatic changes) or anthropic factors (e.g. agriculture), is a widespread environmental stressor that can affect development and growth of salt-sensitive plants, leading to water deficit, the inhibition of intake of essential ions and

First Report of Ear Soft Rot of Corn (Zea mays) Caused by Burkholderia gladioli in the United States.

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During the summer of 2005, an uncharacterized disease was observed on sweet corn 'Mirai 301BC' commercially grown in Sunflower County, Mississippi. Initial symptoms developing at the base of the ear on interior husk leaves were brown, water-soaked, irregular lesions. These gradually enlarged up to

Expression of maize phosphoenolpyruvate carboxylase in transgenic tobacco : effects on biochemistry and physiology.

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The expression of maize (Zea mays) phophoenolpyruvate carboxylase (PPC) gene constructions was studied in transgenic tobacco plants (Nicotiana tabacum). Where transcription was under the control of a maize PPC gene promoter, a low level of aberrantly large PPC transcript was detected. Analysis of

Organic acids and iron translocation in maize genotypes.

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Translocation of Fe was studied in WF9 (Fe-efficient) and ys(1)/ys(1) (Fe-inefficient) maize (Zea mays L.) genotypes. Iron-deficient WF9 translocated more Fe to the tops than Fe-deficient ys(1)/ys(1). Malate and citrate contents of root saps increased nearly 2-fold and aconitate increased over

Aspartic-acid synthesis in C3 plants.

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In a previous study (Melzer and O'Leary, 1987, Plant Physiol. 84, 58-60), we used isotopic methods to show that a substantial fraction of protein-bound aspartic acid in tobacco is derived from anaplerotic synthesis via phosphoenolpyruvate (PEP) carboxylase. Similar studies in soybean (Glycine max

Diurnal variations in leaf fluorescence induction kinetics: variable fluorescence in crassulacean Acid metabolism plants.

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The variable fluorescence of leaves from Kalanchoë daigremontiana and pineapple, Ananas comosus, both CAM plants, was found to change over a 24-hour cycle and to exhibit high temperature-dependent maxima during the night period. The time course of the induced fluorescence was correlated with malic

Filter strip as a method of choice for apoplastic fluid extraction from maize roots.

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Apoplastic fluid was extracted from maize (Zea mays L.) roots using two procedures: collection from the surface of intact plant roots by filter paper strips (AF) or vacuum infiltration and/or centrifugation from excised root segments (AWF). The content of cytoplasmic marker (glucose-6-phosphate,

Influence of arbuscular mycorrhiza on organic solutes in maize leaves under salt stress.

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A pot experiment was conducted to examine the effect of the arbuscular mycorrhizal (AM) fungus, Glomus mosseae, on plant biomass and organic solute accumulation in maize leaves. Maize plants were grown in sand and soil mixture with three NaCl levels (0, 0.5, and 1.0 g kg(-1) dry substrate) for 55

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