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We investigated the roles of neodymium trichloride (NdCl3) in regulating ascorbate-glutathione (AsA-GSH) cycle and chloroplast function of chromium (Cr)-stressed wheat seedlings. The findings showed that Cr stress markedly increased malondialdehyde (MDA) content, electrolytic leakage (EL), nonphotochemical quenching, and the activities of enzymes in AsA-GSH cycle, compared with control. However, Cr stress markedly reduced the ratios of reduced ascorbate to dehydroascorbate and reduced glutathione to oxidized glutathione, net photosynthetic rate, the contents of chlorophylls and carotenoids, maximum photochemical efficiency of PSII, photochemical quenching, and quantum efficiency of PSII photochemistry, as well as plant height, root length, and plant biomass. NdCl3 plus Cr stress markedly reduced MDA content and EL and improved other indicators, compared with Cr stress alone. Meanwhile, NdCl3 alone also markedly improved above indicators except MDA and EL, compared with control. Current results implied that NdCl3 improved AsA-GSH cycle and chloroplast function of wheat seedlings under Cr stress. [ABSTRACT FROM AUTHOR]

Deals with a study on the physical processes involved in the temperature-dependent photoreflectance of single aluminum gallium arsenide/gallium arsenide modulation-doped heterojunction structures. Details of the experiment; Results and discussion; Correlation between the theoretical lines and the experimental data.

Provides information on a study which examined the signals from buried layer in silicon-δ-doped gallium arsenide of different undoped cap thickness by differential photoreflectance. Experiments; Results and discussion; Conclusion.

Presents a study which calculated the line shape of electromodulation in uniform electric field of δ-doped gallium arsenide. Comparison of the results of the calculations with the experiments; Equations related line shape of electromodulation; Analysis of the electric field of Franz-Keldysh oscillations.

Presents a study that examined silicon-doped gallium arsenide (GaAs) samples grown by molecular-beam epitaxy. Use of photoreflectance (PR) spectroscopy; Schematic representation of the conduction-band diagram obtained by self-consistent calculation for doped GaAs with silicon; Discussion on the thickness dependence of PR spectra.

We described twenty polymorphic microsatellite loci derived from the expressed sequence tags of Puccinia striiformis f. sp. tritici, which causes yellow rust disease on wheat. The numbers of alleles range from two to six and eight microsatellite loci show significant similarities to known genes. Observed and expected heterozygosities ranged from 0.12 to 0.78 and from 0.24 to 0.87, respectively. [ABSTRACT FROM AUTHOR]