Antagonistic Effects of High and Low Temperature Pretreatments on the Germination and Pregermination Ethylene Synthesis of Lettuce Seeds 1

AUTOR(ES)

Burdett, A. N.

RESUMO

Red light-induced germination of Grand Rapids lettuce seeds (Lactuca sativa L.) incubated at 20 C was inhibited if the seeds were first imbibed at 30 C for 36 hours. This effect was counteracted by exogenous ethylene and associated with a reduction in the rate at which the seeds produced ethylene throughout the pregermination period. A chilling treatment reversed the effect of a prior imbibition at 30 C on both germination and ethylene production. The possibility that the pretreatments influence germination through their effects on ethylene production is discussed.

Documentos Relacionados

• Lettuce Seed Germination: Modulation of Pregermination Protein Synthesis by Gibberellic Acid, Abscisic Acid, and Cytokinin 1
• Effects of Temperature, Water Potential, and Light on Germination Responses of Redroot Pigweed Seeds to Ethylene
• Ethylene Synthesis in Lettuce Seeds: Its Physiological Significance 1
• Promotive Effects of Organic Solvents and Kinetin on Dark Germination of Lettuce Seeds 12
• Actions of Gibberellic Acid and Phytochrome on the Germination of Grand Rapids Lettuce Seeds 1