Isoxazolin-5-ones and Amino Acids in Root Exudates of Pea and Sweet Pea Seedlings.

Seeds of Pisum sativum L. cv Finale and Lathyrus odoratus L. cv Spencer were germinated aseptically in moistened sand in the dark.

A high amount of satellite DNA in the genome of Lupinus angustifolius L.

Embryo DNA, isolated from ungerminated seeds of Lupinus angustifolius L., contains an exceptionally high amount of guanine-cytosine-rich satellite DNA. The thermal denaturation curve of total embryo DNA is biphasic with an inflexion point at 62% denaturation, indicating the presence of satellite DNA.

Endomitosis and the effect of gibberellic acid in different Pisum sativum L. cultivars.

The evolution of the total amount of DNA in epicotyls and of the amount of DNA per cell nucleus in epicotyl cortex cells during germination was followed in two closely related pea varieties, Pisum sativum cv. Finale and Pisum sativum cv. Rondo.

Stimulation of Endomitotic DNA Synthesis and Cell Elongation by Gibberellic Acid in Epicotyls Grown from Gamma-irradiated Pea Seeds.

Large doses of gamma-irradiation, given to air-dried pea seeds, inhibit the endomitotic DNA synthesis in pea epicotyls during germination in darkness. The cortex cells of the etiolated epicotyls reach only the 4 C DNA level, whereas cortex cells of unirradiated seeds reach the 8 C DNA level. Epicotyl elongation and cell elongation are also reduced.

The presence of minor histone components in the chromatin of Pisum sativum L. seedlings.

Two minor basic protein components (M1 and M2) were found in the histone extract from chromatin of pea seedlings. In the histone extract of pea cotyledons only one minor component (M1) was detected. These minor components show a high affinity for chromatin, have a molecular weight of 20.

Effect of light on cell elongation, nucleic acid and protein synthesis in hypocotyls of Lupinus angustifolius.

The synthesis of DNA, RNA, protein and dry matter was followed in the elongating cells of hypocotyl of Lupinus (Lupinus angustifolius L.) germinating in total darkness or in continuous light. Light strongly inhibits the synthesis of DNA, RNA and protein.

Effect of light on nucleic-acid synthesis and polyploidy level in elongating epicotyl cells of Pisum sativum.

The synthesis of DNA and RNA and the increase in dry matter were followed in the elongating cells of the epicotyl of peas (Pisum sativum L.) germinating in total darkness or in continuous light. The amounts of DNA and RNA per epicotyl were estimated by chemical methods, the amount of DNA per cell was measured by histophotometric techniques.