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Derivation of the formyl-group oxygen of chlorophyll b from molecular oxygen in greening leaves of a higher plant (Zea mays).

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Using mass spectroscopy, we demonstrate as much as 93% enrichment of the 7-formyl group oxygen of chlorophyll b when dark-grown, etiolated maize leaves are greened under white light in the presence of 18O2. This suggests that a mono-oxygenase is involved in the oxidation of its methyl group

Hierarchical Response of Light Harvesting Chlorophyll-Proteins in a Light-Sensitive Chlorophyll b-Deficient Mutant of Maize.

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The light-sensitive chlorophyll b (Chl b)-deficient oil yellow-yellow green (OY-YG) mutant of maize (Zea mays) grown under conditions of high light exhibits differential reductions in the accumulation of the three major Chl b-containing antenna complexes and characteristic changes in thylakoid

A comparative study of the physiological and biochemical properties of tomato (Lycopersicon esculentum M.) and maize (Zea mays L.) under palladium stress.

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There is great concern about the environmental impact and toxicity of palladium (Pd) because of its widespread use in automotive catalytic converters and other applications. Pd migrates and transforms in the environment and is absorbed by plant roots where it affects plant growth and eventually

Compensatory Alterations in the Photochemical Apparatus of a Photoregulatory, Chlorophyll b-Deficient Mutant of Maize.

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Characterization of the functional organization of the photochemical apparatus in the light sensitive chlorophyll b-deficient oil yellow-yellow green (OY-YG) mutant of maize (Zea mays) is presented. Spectrophotometric and kinetic analysis revealed substantially lower amounts of the light harvesting

Localization of photosynthetic electron transport components in mesophyll and bundle sheath chloroplasts of Zea mays.

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The organization of the electron transport components in mesophyll and bundle sheath chloroplasts of Zea mays was investigated. Grana-containing mesophyll chloroplasts (chlorophyll a to chlorophyll b ratio of about 3.0) possessed the full complement of the various electron transport components,

Toxicity of Fusarium mycotoxins on maize plants.

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Synergistic effects of Fusarium - toxins mixture (moniliformin, fumonisin B1, fusaproliferin, zearalenone, zearalenol and deoxynivalenol, each at concentration 3.5 μg mL-1) on maize plants of resistant and susceptible cultivars were studied. After 72-hour treatment the biomass production with both

Development of Photosystem I and Photosystem II Activities in Leaves of Light-grown Maize (Zea mays).

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To compare chloroplast development in a normally grown plant with etiochloroplast development, green maize plants (Zea mays), grown under a diurnal light regime (16-hour day) were harvested 7 days after sowing and chloroplast biogenesis within the leaf tissue was examined. Determination of total

Characterization and functional analysis of a B3 domain factor from Zea mays.

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In this study, we isolated a full-length cDNA and named ZmBDF from zea mays. ZmBDF encoded a protein of 356 amino acids and phylogenetic analysis showed that it belongs to a closely related subgroup with B3 domain factors in plants. The transcript level of ZmBDF could be induced by ABA, MeJA, salt

Response of maize (Zea mays L. saccharata Sturt) to different concentration treatments of deltamethrin.

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The aim of this study was to investigate the effect of the deltamethrin pesticide on the biological properties of maize (Zea mays L. saccharata Sturt). Maize seeds were exposed to environmentally relevant dosages (0.01, 0.05, 0.1 and 0.5 ppm) of deltamethrin. On the 7th day of germination,

Relief Role of Lysine Chelated Zinc (Zn) on 6-Week-Old Maize Plants under Tannery Wastewater Irrigation Stress

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Tannery wastewater mainly comes from leather industries. It has high organic load, high salinity, and many other pollutants, including chromium (Cr). Tannery wastewater is generally used for crop irrigation in some areas of Pakistan and worldwide, due to the low availability of good quality of

Gamma radiation effects on seed germination, growth and pigment content, and ESR study of induced free radicals in maize (Zea mays).

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The effects of gamma radiation are investigated by studying plant germination, growth and development, and biochemical characteristics of maize. Maize dry seeds are exposed to a gamma source at doses ranging from 0.1 to 1 kGy. Our results show that the germination potential, expressed through the

Polyamine biosynthetic pathways and their relation with the cold tolerance of maize ( Zea mays L.) seedlings

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Background: The present study was designed to investigate the inhibition role of two polyamine biosynthesis inhibitors, i.e., D-arginine (D-Arg) and DL-α-difluoromethylornithine (DFMO), in polyamine biosynthesis under chilling stress in

Photochemical properties of mesophyll and bundle sheath chloroplasts of maize.

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Several photochemical and spectral properties of maize (Zea mays) bundle sheath and mesophyll chloroplasts are reported that provide a better understanding of the photosynthetic apparatus of C(4) plants. The difference absorption spectrum at 298 K and the fluorescence excitation and emission spectra

Photosynthetic carbon metabolism in isolated maize bundle sheath strands.

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Photosynthetically active bundle sheath strands capable of assimilating up to 8 micromoles CO(2) per milligram chlorophyll per hour have been isolated from fully expanded leaves of Zea mays L. Mesophyll cell contamination of the preparations was negligible, as evidenced by light and electron

[QTL mapping for chlorophyll content in maize].

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In order to explore the genetic basis for chlorophyll content in maize (Zea mays L.), a total of 189 F2 individuals derived from the single cross between the inbred lines A150-3-2 and Mo17 were used as mapping population. Four traits associated with chlorophyll content were measured at the trumpet

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