Book with abstracts from the COST Action 0905 meeting in ... - UMB

PRELIMINARY EVALUATION OF IODINE AND SALICYLIC ACID
INTERACTION ON YIELD, FRUIT QUALITY AND IODINE
UPTAKE BY TOMATO PLANTS CULTIVATED IN A HYDROPONIC
SYSTEM (NFT)
Sylwester Smoleń, Włodzimierz Sady, Joanna Wierzbińska
Department of Soil Cultivation and Fertilization of Horticultural Plants Faculty of
Horticulture, University of Agriculture in Kraków, Poland
Key words: iodine, salicylic acid, biofortification, tomato, biological quality
The aim of the study was to determine the influence of iodine application in two
forms (I - and IO 3 - ) and salicylic acid (SA) on yield, iodine uptake by plants and fruit
quality of tomato cv. ‘Rambozo F 1 ’ cultivated in a glasshouse in Nutrient Film Technique
system (NFT). The following treatments were applied in the experiment: 1./ Control; 2./ 1
mg I · dm -3 nutrient solution in KI form; 3./ 1 mg I · dm -3 nutrient solution in KIO 3 form.
4./ 1 mg I (in KI form) +1 mg SA per one dm 3 of nutrient solution; 5./ 1 mg I (in KIO 3
form) +1 mg SA per one dm 3 of nutrient solution.
In comparison to the control, a significant increase in iodine content in pinnate
leaves and petioles from combinations 2 and 3 (the oldest – located lowermost; fully
developed – first leaf above 3 rd cluster; the youngest – above 6 th cluster) was noted ranging
between 780% and 8.870% for KI as well as 108% and 1.830% for KIO 3 . Additional
application of SA to nutrient solution increased iodine accumulation in tested parts of
plants, particularly for KIO 3 (in the range of 47% to 539%) rather than KI application (1-
25%) as well as for a greater degree in the youngest leaves than the oldest ones.
Introduction of iodine salts as well its simultaneous application with SA improved
iodine accumulation in fruits. Addition of SA to nutrient solution contributed to an increase
in the level of phenolic compounds and acidity of tomato fruits. It was revealed that tested
factors had no significant influence on yield as well as the content of lycopene and β-
carotene in fruits.
This work was financed by the Polish Ministry of Science and Higher Education -
grant no. N N310 080238 „Effectiveness of iodine biofortification of tomato cultivated in
hydroponic system with recirculating nutrient solution”.