Effect of zinc application on tryptophan synthesis, total amino acids and total soluble proteins of leaves of coffee seedlings
The effects of Zn application on tryptophan synthesis, total amino acids and total soluble proteins of leaves of coffee (Coffea arabica) seedlings, grown in nutrient solution without Zn for four months, were examined. The plants were sprayed with 0.6 percent ZnSO4.7H2O in three different regions (basal: 6 pairs of lower leaves; apical: 6 pairs of upper leaves; and plagiotropic branches). The plants were harvested 0 (control), 12, 24, 48 or 72 h after application of Zn. The leaves were then separated into lots taken from the basal as well as from the plagiotropic branches. These were analysed for tryptophan concentration, total amino acids and total soluble proteins. A reduction in the tryptophan concentration was observed following Zn application together with an increase in the concentration of total amino acids and total soluble proteins.
| Main Authors: | , , , |
|---|---|
| Format: | biblioteca |
| Published: |
2002
|
| Subjects: | COFFEA, COFFEA ARABICA, AMINOACIDOS, CAFE, HOJAS, NUTRICION DE LAS PLANTAS, PROTEINAS VEGETALES, PLANTULAS, OLIGOELEMENTOS, TRIPTOFANO, CINC, |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|