THE EFFECTS OF PP 333 AND CCC ON SEED GERMINATION AND SEEDLING HEIGHT CONTROL OF TOMATO

One of the major problems of commercial transplant production is excessive stem elongation.
Many methods are used to control transplant height such as temperature control, withholding water, clipping the shoots and plant growth regulators.
Among them, plant growth regulators are easy to use and inexpensive.
In this study, Paclobutrazol (PP 333) and Cycocel (CCC) plant growth regulators were used.
For this purpose of controlling the seedling height the tomato seeds (cv. ‘Rio Grande’) were soaked in 250 and 500 ppm PPP 333 and 500 and 1000 ppm CCC solutions for 30, 60 and 120 minutes at 20°C. On 25^th and 35^th days after seeding (DAS) seedling height and diameter, leaf color, stem and root dry weights were measured.
According to the results, 250 and 500 ppm PP 333 treatments reduced the seedling height by 55% and 58%, respectively.
The 500 ppm PP 333 caused a decrease in germination by 19%. CCC treatments were less effective than the PP 333 treatments to control seedling height and did not affect germination percentage.

III Balkan Symposium on Vegetables and Potatoes

A. Ugur, S. Kavak

Lycopersicon lycopersicum, growth retardant, seed germination, seedling features, leaf color

https://doi.org/10.17660/ActaHortic.2007.729.32