Browsing by Author "Tekintas, FE"

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Changing of Flavan Contents at Some Organs of Walnut Seedlings (Juglans Regia L) Exposed To the Controlled Grafting Conditions
(international Society Horticultural Science, 1997) Sen, SM; Karadeniz, T; Balta, F; Tekintas, FE; Tanrisever, A
In this study, changing of the flavans, which are one of the phenolic compounds, in the shoot tips, the roots and the bases of lateral branches was followed. The flavan changes after 1, 15, 30 and 45 days in the organs of two years old seedlings of walnut (Juglans regia L.) under controlled grafting conditions with 26+/-2 degrees C temperature and 60-70 % humidity were determined by TLC (Thin Layer Chromatography). The observations in the first 30 days were evaluated in relation to the anatomical structure of the graft union, and the changes of 50 days were considered connected with changing of the phenolic compounds in case of exposing to the controlled conditions. Consequently, the flavans decreased 35.95 % in the shoot tips, 32.68 % in the bases of lateral branches and 19.38 % in the roots in first 30 days. But, they increased 48.86 % in the shoot tips and 34.29 % at the roots while reducing 68.81 % in the bases of lateral branches from 30th day to 50th day. In addition, from the 1st day to 50th day they showed a decrease of 4.66 % in the shoot tips and of 79.00 % in the base of lateral branches. but an increase of 8.27 % in the root.
Effects of the Flavan Contents Extracted From Walnut (Juglans Regia L) on Coleoptile Growth, and a Comparison of Relations Between the Total Flavans and the Graft Success With These Effects
(international Society Horticultural Science, 1997) Karadeniz, T; Balta, F; Sen, SM; Tekintas, FE; Tanrisever, A
In order to study the biological effects of the flavans on coleoptile growth of oats (Avena sativa L.), the total flavan contents (Catechin, epicatechin, biflavan and oligomer flavan), one of phenolic compounds in phloem tissues of annual shoots of walnut collected monthly for one year were detected by TLC (Thin Layer Chromatography). Coleptile developments in the mediums of Flavan, Flavan+ IAA, IAA (Indole acetic acid), and control treatments were evaluated. Flavans inhibited the coleopthyl growth between 6.30 % and 12.73 % in all months according to control treatments. On the other hand, chip-buddings were made each month, and the total flavans in phloem tissues were also determined. Therefore, the graft success and changing of the total flavans in the annual shoots according to months were discussed compared with the inhibiting effects of the flavan treatments. Both the inhibiting percentages of the flavans on coleopthyl growth and also the total flavan contents in the annual shoots were found to be higher in May, July and August months when the graft success was lower. Namely, the total flavans in the plant structure and their biological effects in the flavan medium showed a negative relation with the graft success in these months. But, similar relations were not recorded in all months. The results revealed that graft success might not depend on only the flavan contents in the structure, but also other factors such as anatomical structure, hormonal conditions of the rootstock and scion, and graft technique, etc.
The Effects on Seed Germination and Seedling Growth of the Tissue Extracts Obtained From Different Organs of Walnut (Juglans Regia L)
(international Society Horticultural Science, 1997) Balta, F; Karadeniz, T; Sen, SM; Tekintas, FE; Tanrisever, A
The effects on germination and hypocotyl and primary developments of cucumber seeds of the tissue extracts, which were added to germination mediums as 2 ml, 4 ml, 6 ml and 8 ml, belonging to phloem, bark with and without buds, bark of shoot tip, root bark and tip buds were evaluated. While no germination in the mediums of 6 ml and 8 ml extracts was not seen, germinations were observed in the mediums of 2 ml and 4 ml extracts and control treatments. Tissue extracts were recorded to have shown an inhibiting effect. In addition, total flavan contents of different parts changed between 4.32 mg/g and 8.27 mg/g.
Relations Between Graft Success and Structural Hormones on Walnut (Juglans Regia L)
(international Society Horticultural Science, 1997) Kazankaya, A; Sen, SM; Tekintas, FE
In this study, in walnuts (Juglans regia L.) grafted at one month intervals during one year, the relations between the graft success and the levels of structural hormones in the scions were evaluated. As for the months, the graft success was the highest in February (100 %), while it was lowest in June (54 %). As a consequence of the biological, it was determined that the structural hormones in the scions changed by months, but they generally became dense in the 4th, 7th, 9th and 10th bands. The effective inhibitions were not significantly recorded in none of the months. Finally, any relation between the graft success and the levels of the structural hormones was not considered.