Carbon Dioxide and Ethylene Control of Spore Germination in Onoclea sensibilis L

Biochemistry of Fern Spore Germination: GLYOXYLATE AND GLYCOLATE CYCLE ACTIVITY IN ONOCLEA SENSIBILIS L.

In chlorophyll-containing spores of Onoclea sensibilis, depletion of lipid reserves during germination is correlated with increases in the activity of the glyoxylate cycle enzymes isocitrate lyase and malate synthase. In Onoclea, the heterotrophic activity associated with lipid catabolism occurs at the same time that autotrophic activity is taking place. Increases in chlorophyll content and in ...

Reversal by Light of Ethylene-induced Inhibition of Spore Germination in the Sensitive Fern Onoclea sensibilis: An Action Spectrum.

Spores of the fern Onoclea sensibilis L. normally germinate to produce two cells of unequal size. The larger cell divides to produce the familiar heart-shaped prothallus. The smaller cell elongates and differentiates into the rhizoid but normally does not divide again. Onoclea spores germinate in complete darkness. Dark germination can be completely inhibited by ethylene gas (10 microliters per...

On Antheridial Metabolism in the Fern Species Onoclea sensibilis L.

Dopp (1) demonstrated that the extract from mature prothalli of the fern species Ptcridiwtn1 aquiilinunil (L.) Kuhln hastened the onset of antheridium formation in young prothalli of this species by several days and in the prothalli of Dryopteris filixwwlas (L). Schott by several weeks. Dopp's conclusion that the prothalli of P. aquilinit elaborate a specific antheridium-inducing factor was con...

Temperature and Photocontrol of Onoclea Spore Germination 1

Germination of Oncwk seblis L. spores is controlied by light and temperature. Temperatures of30 C can induce maximal germination in the dark to a level of 60 to 95% of that induced by a saturating dose of red light (0.38 joules/square meter) providing the spores are placed at the elevated temperature immediately after being sown. Maximum dark germination occurs with a minhmum exposure of 16 to ...

Physiological studies on spore germination, with special reference to Clostridium botulinum; carbon dioxide and germination, with a note on carbon dioxide and aerobic spores.