Glutamate Synthase Cycle in the Leaves of Tomato (Lycopersicon esculentum)

1987 ◽  
pp. 142-143 ◽  
Author(s):  
V. Valpuesta ◽  
I. Nuñez de Castro ◽  
F. M. Cánovas ◽  
C. Avila ◽  
J. R. Botella
Keyword(s):  
Lycopersicon Esculentum ◽  
Glutamate Synthase

Separation of two forms of glutamate synthase in leaves of tomato (Lycopersicon esculentum)

1984 ◽  
Vol 122 (3) ◽  
pp. 1125-1130 ◽  
Author(s):  
C. Avila ◽  
F. Cánovas ◽  
I. Nún˜ez de Castro ◽  
V. Valpuesta
Keyword(s):  
Lycopersicon Esculentum ◽  
Glutamate Synthase

Effect of salt-stress on proline metabolism in calli of Lycopersicon esculentum, Lycopersicon pennellii, and their interspecific hybrid

1995 ◽  
Vol 73 (12) ◽  
pp. 1939-1946 ◽  
Author(s):  
Gilles Guerrier
Keyword(s):  
Salt Stress ◽  
Amino Acid ◽  
Lycopersicon Esculentum ◽  
Enzyme Activities ◽  
Interspecific Cross ◽  
Glutamate Synthase ◽  
Proline Biosynthesis ◽  
Domestic Species ◽  
Lycopersicon Pennellii ◽  
Proline Catabolism

Amino acid pools and enzyme activities of NH3-assimilation (glutamine synthetase, glutamate synthase), proline biosynthesis (pyrroline-5-carboxylate reductase), proline catabolism (proline dehydrogenase, proline oxidase), and ornithine transamination (ornithine transaminase) were determined in control and salinized (140 mM NaCl) calli from tomato roots. Three populations were used: the domestic salt-sensitive Lycopersicon esculentum Mill. cv. P-73, the wild salt-tolerant Lycopersicon pennellii (Correll) D'Arcy, accession PE-47, and their F1 interspecific cross, for which the relative growth rate on salt media was intermediate to those of the parents. Compared with control conditions, proline levels increased with NaCl treatments by twofold, threefold, and sixfold in the wild species, the F1 hybrid, and the domestic species, respectively. This proline accumulation in the F1 and the domestic populations was not modulated by changes in the enzyme activities of proline biosynthesis or catabolism. NaCl tolerance, amino acid (proline, alanine, arginine, asparagine) content, and velocity of enzymes responsible for proline biosynthesis and catabolism are dependent on explant sources (cotyledon, root) from which the F1 calli were derived. The comparison of proline (PRO) responses in the different calli and populations indicated (i) various changes in anabolic or catabolic rates of PRO metabolism for a given range of PRO accumulation and (ii) the presence in the F1 of both wild and sensitive parent characters in growth and PRO responses. Key words: callus culture, Lycopersicon esculentum, Lycopersicon pennellii, F1 tomato, proline synthesis, proline catabolism, salt stress.

Action des basses températures nocturnes sur une collection variétale de tomate (Lycopersicon esculentum Mill.) II. - Etude de la quantité et de la qualité du pollen

Agronomie ◽  
1982 ◽  
Vol 2 (5) ◽  
pp. 453-458 ◽  
Author(s):  
Brigitte MAISONNEUVE ◽  
Jacqueline PHILOUZE ◽  
Maguy MILESI
Keyword(s):  
Lycopersicon Esculentum ◽  
Lycopersicon Esculentum Mill

Influence de l'intensité et du mode de distribution de l'énergie lumineuse sur la croissance et les échanges de CO2 de jeunes plants de tomate de serre (Lycopersicon esculentum var. « Lucy »)

Agronomie ◽  
1983 ◽  
Vol 3 (1) ◽  
pp. 27-32 ◽  
Author(s):  
Jacques RIOBE ◽  
Catherine BAUBAULT ◽  
Marianne MOUSSEAU
Keyword(s):  
Lycopersicon Esculentum
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