Growth physics and water relations of red-light-induced germination in lettuce seeds

Planta ◽  
1981 ◽  
Vol 152 (2) ◽  
pp. 131-136 ◽  
Author(s):  
Nicholas C. Carpita ◽  
Murray W. Nabors
Keyword(s):  
Water Relations ◽  
Red Light ◽  
Lettuce Seeds

The growth physics and water relations of red-light-induced germination in lettuce seeds

Planta ◽  
1971 ◽  
Vol 101 (1) ◽  
pp. 1-25 ◽  
Author(s):  
Murray W. Nabors ◽  
Anton Lang
Keyword(s):  
Water Relations ◽  
Red Light ◽  
Lettuce Seeds

The growth physics and water relations of red-light-induced germination in lettuce seeds

Planta ◽  
1979 ◽  
Vol 144 (3) ◽  
pp. 225-233 ◽  
Author(s):  
Nicholas C. Carpita ◽  
Murray W. Nabors ◽  
Cleon W. Ross ◽  
Nancy L. Petretic
Keyword(s):  
Water Relations ◽  
Red Light ◽  
Lettuce Seeds

The growth physics and water relations of red-light-induced germination in lettuce seeds

Planta ◽  
1971 ◽  
Vol 101 (1) ◽  
pp. 26-42 ◽  
Author(s):  
Murray W. Nabors ◽  
Anton Lang
Keyword(s):  
Water Relations ◽  
Red Light ◽  
Lettuce Seeds

The growth physics and water relations of red-light-induced germination in lettuce seeds

Planta ◽  
1979 ◽  
Vol 144 (3) ◽  
pp. 217-224 ◽  
Author(s):  
Nicholas C. Carpita ◽  
Murray W. Nabors ◽  
Cleon W. Ross ◽  
Nancy L. Petretic
Keyword(s):  
Water Relations ◽  
Red Light ◽  
Lettuce Seeds

ACTION AND INTERACTION OF MONOCHROMATIC LIGHT ON PHOSPHATE METABOLISM OF GERMINATING LETTUCE SEEDS

1962 ◽  
Vol 40 (7) ◽  
pp. 965-974 ◽  
Author(s):  
Kenneth Surrey
Keyword(s):  
Energy Flow ◽  
Spectral Band ◽  
Red Light ◽  
Monochromatic Light ◽  
Lettuce Seed ◽  
Phosphate Metabolism ◽  
Lettuce Seeds ◽  
Phytochrome System ◽  
Lettuce Seed Germination ◽  
Partial Suppression

A previously described photoresponse of lettuce seed germination to red and far-red light is shown to be paralleled by a response of phosphate metabolic activity: (1) When seeds were continuously irradiated, red light accelerated and far-red suppressed their phosphate uptake and esterification. (2) The influence of monochromatic light on phosphate metabolism of seeds, determined after 36 and 64 hours of germination, respectively, indicated maximum potentiation between 550 and 650 mμ, maximum suppression beyond 700 mμ, and partial suppression at 475 mμ. Stimulation was encountered at 400 mμ, but with shorter wavelengths of the ultraviolet spectrum, suppression appeared again. (3) Photoactivation of phosphate metabolism in response to each of the three loci (550, 600, and 650 mμ, i.e., green, orange, and red light, respectively) of the potentiating spectral band was reversed by far-red (750 mμ) light. These activations and inhibitions could be reversed several times in an alternating sequence. Complete reversibility depended entirely upon the magnitudes of the radiant flux for the two counteracting wavelengths, and this was characteristic for each pair of antagonistic wavelengths. In view of the association of phytochrome with the isolated mitochondria and of the specific manner in which their phosphorylation activity is influenced by light, it is suggested that a part of the energy flow required for cellular development may be channeled through the mitochondrial–phytochrome system.

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