Effect of substituted cyclopentenones and cyclopentanones on lettuce seed germination and radicle growth

1977 ◽  
Vol 25 (6) ◽  
pp. 1426-1427 ◽  
Author(s):  
Nora Katsin ◽  
Raphael Ikan ◽  
Abraham H. Halevy
Keyword(s):  
Seed Germination ◽  
Lettuce Seed ◽  
Radicle Growth ◽  
Lettuce Seed Germination

scholarly journals Preventing thermoinhibition in a thermosensitive lettuce genotype by seed imbibition at low temperature

2003 ◽  
Vol 60 (3) ◽  
pp. 477-480 ◽  
Author(s):  
Warley Marcos Nascimento
Keyword(s):  
Seed Germination ◽  
Low Temperature ◽  
High Temperatures ◽  
Lactuca Sativa ◽  
Lettuce Seed ◽  
Temperature Dependent ◽  
Lettuce Seeds ◽  
Lactuca Sativa L ◽  
Lettuce Seed Germination ◽  
Dark Green

Lettuce (Lactuca sativa L.) seed germination is strongly temperature dependent and under high temperatures, germination of most of genotypes can be erratic or completely inhibited. Lettuce seeds of 'Dark Green Boston' (DGB) were incubated at temperatures ranging from 15° to 35°C at light and dark conditions. Other seeds were imbibed in dark at 20°; 25°; 30°; and 35°C for 8 and 16 hours and then transferred to 20 or 35°C, in dark. Seeds were also incubated at constant temperature of 20° and 35 °C, in the dark, as control. In another treatment, seeds were primed for 3 days at 15°C with constant light. DGB lettuce seeds required light to germinate adequately at temperatures above 25°C. Seeds incubated at 20°C had 97% germination, whereas seeds incubated at 35°C did not germinate. Seeds imbibed at 20°C for 8 and 16 hours had germination. At 35°C, seeds imbibed initially at 20°C for 8 and 16 hours, had 89 and 97% germination, respectively. Seeds imbibed at 25°C for 16 hours, germinated satisfactory at 35°C. High temperatures of imbibition led to no germination. Primed and non-primed seeds had 100% germination at 20°C. Primed seeds had 100% germination at 35°C, whereas non-primed seeds germinate only 4%. The first hours of imbibition are very critical for lettuce seed germination at high temperatures.

Dichloromethane and Lettuce Seed Germination

Science ◽  
1973 ◽  
Vol 179 (4068) ◽  
pp. 96-96
Author(s):  
H. Meyer ◽  
A. M. Mayer
Keyword(s):  
Seed Germination ◽  
Lettuce Seed ◽  
Lettuce Seed Germination

CHEMICAL CONSTITUENTS IN WILD OAT (Avenu fatua) HULLS AND THEIR EFFECTS ON SEED GERMINATION

1982 ◽  
Vol 62 (1) ◽  
pp. 155-161 ◽  
Author(s):  
FRANK S. CHEN ◽  
JOHN M. MacTAGGART ◽  
RICHARD M. ELOFSON
Keyword(s):  
Seed Germination ◽  
Chemical Constituents ◽  
Short Chain Fatty Acids ◽  
Inhibitory Effect ◽  
Water Soluble ◽  
Nonanoic Acid ◽  
Lettuce Seed ◽  
Wild Oat ◽  
Phenolic Inhibitor ◽  
Lettuce Seed Germination

Aqueous extracts of dormant wild oat (Avena fatua L.) hulls had a weak inhibitory effect on lettuce seed germination. Both paper and thin layer chromatographic analyses of the ether-soluble acidic fraction showed the presence of phenolics and short-chain fatty acids. No abscisic acid was detected. Vanillin, protochatechualdehyde, p-coumaric acid, ferulic acid and caffeic acid were isolated from hull extracts. Vanillin was shown to be the main water-soluble phenolic inhibitor of lettuce seed germination. At a concentration higher than 6.6 × 10−3M, vanillin was found to be more inhibitory than nonanoic acid to both lettuce and wild oat germination. The concentration of phenolics in the hulls does not account for suppression of wild oat seed germination.

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