EFFECT OF ZINC AND AMINO ACIDS ON GROWTH, YIELD AND CHEMICAL CONSTITUENTS OF CARAWAY ( Carum carvi, L.) PLANTS

Abstract

to study the effect of zinc at (0, 50 and 100 ppm) and some amino acids, tryptophan at (0, 50 and 100 ppm) and methionine at (0, 25 and 50 ppm) on growth, yield, oil production and chemical composition of caraway (Carum carvi, L.) plants. The results showed that zinc application had no significant effect on plant height in the first season, number of branches / plant, dry weight / plant and number of umbels / plant in both seasons. Whereas zinc at 50 ppm significantly increased plant height and dry weight / plant in the second season. Zinc at 50 and 100 ppm significantly increased fresh weight / plant in both two seasons , fruit yield / plant and oil yield/ plant in the second one. Zinc at 50 and 100 ppm insignificantly increased oil percentage in both two seasons. Zinc at 50 and 100 ppm decreased limonine percentage in the oil and increased carvone percentage in the oil in both two seasons, total carbohydrates contents in both leaves and roots in the first season. Zinc at 50 ppm increased total carbohydrates in fruits in the first season, while 100 ppm increased it in leaves, fruits and roots in the second one. Tryptophan and methionine had a significant effect on plant fresh and dry weights in both seasons. The most effective treatment was methionine application at 50 ppm. Tryptophan and methionine at 50 ppm gave the highest fruit yield / plant in the first and second seasons, respectively. Amino acids (tryptophan and methionine) insignificantly increased volatile oil percentage and oil yield / plant in the first season. Whereas, methionine at 25 ppm significantly decreased oil percentage in the second season. Methionine at the highest rate (50 ppm) decreased limonene and increased carvone percentages in caraway essential oil in both seasons. Amino acids application increased total carbohydrates percentage in leaves in the first season, in fruits and roots in both two seasons. Interaction between zinc and amino acids (tryptophan and methionine) had a significant effect on most vegetative growth characteristics, fruit yield / plant, oil percentage and oil yield / plant, and

Effect of planting dates and some growth stimulants on growth and productivity of chia plant

“…In agreement withs these results were the findings ofEl-Sayed et al (2007),Ali and Sallam (2022) on caraway, Mostafa (2015) on fennel, Tarraf et al (2015) on fenugreek and Ayyat et al (2021) on Nigella sativa for AAs, as well as, El-Desouky et al (2022) on chia, Tarraf et al (2015), Mafakheri and Asghari (2018) and Dehkordi et al )2021) on fenugreek, Hassan et al )2022) and Ali et al (2023) on fennel in regard to SWE.…”