Some cucurbit plants (Cucumis sativus L., Cucurbita pepo Cucumis melo L. and Citrillus lanatus L.) were used for investigating some physiological changes protein patterns under heat stress in plants. Leaf samples exposed tohigh temperatures as follows 35, 40, 45, 50, 55 60°C. Percentage of ion leakage, chlorophyll content, leaf relative water content (RWC) loss turgidity, total soluble (TSP) pr...

A spectral, immunochemical, and proteolytic characterization of native 120-kilodalton (kD) phytochrome from Cucurbita pepo L. is presented and compared with that previously reported for native 124-kD phytochrome from Avena sativa. The molecule was partially purified ( approximately 200-fold) in the phytochrome-far red-absorbing form (Pfr) in the presence of the protease inhibitor, phenylmethyls...

Hybridization between crops and their weedy or wild relatives is an area of concern because the widespread use of genetically engineered crops may allow novel, bene®cial transgenes to enter nearby populations. We compared ®tness components of wild Cucurbita pepo from Arkansas, USA, with wild±crop hybrids derived from yellow squash (a cultivar of C. pepo with transgenic resistance to two viruses...

Microorganisms are ubiquitous and thought to regulate host populations. Although microorganisms can be pathogenic and affect components of fitness, few studies have examined their effects on wild plant populations. As individual traits might not contribute equally to changes in population growth rate, it is essential to examine the entire life cycle to determine how microorganisms affect host p...

Blue light mediates the phosphorylation of a membrane protein in seedlings from several plant species. When crude microsomal membrane proteins from dark-grown pea (Pisum sativum L.), sunflower (Helianthus annuus L.), zucchini (Cucurbita pepo L.), Arabidopsis (Arabidopsis thaliana L.), or tomato (Lycopersicon esculentum L.) stem segments, or from maize (Zea mays L.), barley (Hordeum vulgare L.),...

An antibody raised against purified glyoxysomal lipase (triacylglycerol hydrolase EC 3.1.1.3.) from castor bean (relative molecular weight of 62,000) also binds to a protein with a relative molecular weight of 62,000 in extracts of food reserve tissues from many young oilseed plants. These plants include Brassica napus L., Zea mays L., Arachis hypogaea L., Glycine max L., Gossipium hirsutum L.,...