Superoxide dismutases (SODs) and superoxide radicals in peroxisomes Peroxisomes are subcellular respiratory organelles that contain catalase and H202-producing flavin oxidases as basic enzymatic constituents [1,2]. In recent years, it has become increasingly clear that peroxisomes carry out essential functions in almost all eukaryotic cells [3-51, and an important characteristic of peroxisomes ...

In contrast to orthodox seeds that acquire desiccation tolerance during maturation, recalcitrant seeds are unable to survive drying. These desiccation-sensitive seeds constitute an interesting model for comparative analysis with phylogenetically close species that are desiccation tolerant. Considering the importance of LEA (late embryogenesis abundant) proteins as protective molecules both in d...

White lupin (Lupinus albus L.), a winter legume crop with tremendous potential as food crop, has been evaluated at Virginia State University for several years. This effort developed winter-hardy, high-yielding lines, which vary in alkaloid concentration the seeds. Current study was conducted to characterize various component of seed especially coat and cotyledon portion seeds five lines (VSU-1,...

Two further loci can be added to the three already known (g , g l and f g ) in Silene controlling the 7 -0 and 2"-0-glycosylation o f the C-glycosylflavone isovitexin (6-C-glucosylapigenin). These loci, 0 7 g for the 7-O-galactosylation and D6a for the 2"-0-arabinosylation, appear only to be expressed in cotyledons and rosette leaves and control the biosynthesis o f isovitexin 7 -0 galactoside ...

The free amino acid concentrations in cotyledons and axes of soybean (Glycine max [L.] Merr. cv. Wells) seedlings were determined by automated single column analysis after germination at 10 and 23 C. After 5 days germination at 10 C, glutamate and aspartate were in high concentration in both cotyledons and axes (38 and 24% of total free amino acids recovered, respectively), whereas the concentr...

Soybean (Glycine max [L.] Merr.) seeds were imbibed and germinated with or without NO(3) (-), tungstate, and norflurazon (San 9789). Norflurazon is a herbicide which causes photobleaching of chlorophyll by inhibiting carotenoid synthesis and which impairs normal chloroplast development. After 3 days in the dark, seedlings were placed in white light to induce extractable nitrate reductase activi...

Abstract Rodents attack oak (Quercus wutaishanica) seeds based on their sizes and frequencies before germination. However, the predation of post-germination (seedling cotyledons) is not well studied. Here, we only tested preference rodents for Q. wutaishanica seedling cotyledons frequency large- versus small-seeded (FLS), but also evaluated effects seedlings growth survival in different habitat...