Sjemenarstvo, Vol. 24 No. 2, 2007.
Original scientific paper
INFLUENCE OF TEMPERATURE ON LETTUCE (Lactuca sativa L.) AND CARROT (Dancus carota L.) SEED GERMINATION AND EMERGENCE
Nada PARAĐIKOVIĆ
Tihana TEKLIĆ
V. GUBERAC
T. VINKOVIĆ
Abstract
Among different abiotic factors that influence seed germination, one of the most important is warmth. Either high or low temperature can significantly decrease seed germination of different agricultural crops. The aim of this investigation was to determine the influence of temperature and sowing time on germination of declared lettuce and carrot seeds. Seed germination and emergence of both crops was tested in conditions of optimal (20°C) and high temperature (30°C) in controlled environment and low temperature during early sowing periods in open field. Carrot seed germination significantly decreased (16%) in high temperature conditions. Moreover, emergence percentage significantly decreased in both species during field trials by about 41% for carrot and up to 57% for lettuce compared to laboratory germination. It can be concluded that stress caused by low temperatures during sowing time and emergence significantly decreases emergence percentage that resulting in low plant density.
Keywords
carrot; lettuce; emergence; germination; temperature stress
Hrčak ID:
18324
URI
Publication date:
28.11.2007.
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