Effect of light and temperature on the germination of lettuce seeds.

11:29 EDT 22nd October 2014 | BioPortfolio

Summary of "Effect of light and temperature on the germination of lettuce seeds."

A short period (15-30 min) at 30° C promotes germination of seeds of Lactuca sativa L. cv. Repolhuda in darkness. Far-red light reverses this stimulation, and the escape curves for phytochrome and high-temperature action are quite similar, indicating that the two factors act at a common point in the chain of events leading to germination. It is suggested that high temperature acts by decreasing the threshold of the active, far-red absorbing, form of phytochrome (Pfr) needed to promote germination.


Departamento de Bioquímica, Universidade Federal de Permambuco, 50. 000, Recife, PE, Brasil.

Journal Details

This article was published in the following journal.

Name: Planta
ISSN: 1432-2048
Pages: 190-192


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Medical and Biotech [MESH] Definitions

The initial stages of the growth of SEEDS into a SEEDLING. The embryonic shoot (plumule) and embryonic PLANT ROOTS (radicle) emerge and grow upwards and downwards respectively. Food reserves for germination come from endosperm tissue within the seed and/or from the seed leaves (COTYLEDON). (Concise Dictionary of Biology, 1990)

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