A Single Dominant Gene Ch for Chilling Resistance in Cucumber Seedlings

Chilling injury is reduced in cucumber and rice seedlings and in tomato pericarp discs by heat-shocks applied after chilling

A number of abiotic shocks (e.g. heat-shock) applied before chilling have previously been shown to increase the chilling tolerance of cucumber and rice seedlings and of tomato fruit. The subsequent rate of radicle growth after chilling of these seedlings is a sensitive measure of chilling injury as is the subsequent increase in ion leakage from chilled discs of tomato pericarp fruit tissue. Dat...

effect of glycine betaine on chilling tolerance of cucumber seedlings

glycine betaine (gb) is one of the osmotic plant-protecting members that accumulate in response to abiotic stresses. an experiment was, therefore, conducted to test whether gb application at various concentrations (0, 10, 20 and 30 mm) through seed soaking or foliar spray methods would protect cucumber seedlings, subjected to chilling stress. at two true leave stages, after gb treatment, the se...

Indoleacetaldehyde in Cucumber Seedlings 1

The presence of indoleacetaldehyde in cucumber (Cucumis sativus L.) cotyledons was demonstrated by thin layer chromatographic RF values in three solvent systems, by the formation and hydrolysis of a bisuulfte adduct, and by chemical reduction to indoleethanol and oxidation to indoleacetic acid. Bioasys indicated a minimum indoleacetaldebyde content in etiolated cotyledons of 0.7 lg per kg fresh...

A Single Dominant Gene for Resistance to the Soybean Aphid in the Soybean Cultivar Dowling

The soybean aphid (Aphis glycines Matsumura), a new pest of soybean [Glycine max (L.) Merr.], rapidly spread throughout North America after its arrival in 2000 and caused millions of dollars in economic losses. At present, the application of insecticides is the only means to control the soybean aphid. However, genetic resistance to the aphid was recently discovered in soybean germplasm and the ...

Relative Drought Resistance of Seedlings of Dominant Prairie Grasses