New Zealand Journal of Crop and Horticultural Science
abstracts
Effect of light and temperature on the phenology and maturation of the fruit
of eggplant (Solanum melongena) grown in greenhouses
Sezgİn Uzun
Department of Horticulture
Faculty of Agriculture
The University of Ondokuz Mayis
55139 Kurupelit, Samsun, Turkey
email: sezginuz@omu.edu.tr
Abstract This study aimed to determine relationships for
the effect of light (between 3 and 7 MJ/m2 per day) and temperature
(between 12°C
and 28°C) on some developmental and fruiting parameters such as days to
first flowering (FD, days), flower bud number/plant (FBN/P), fruit number/plant
(FN/P), mean fresh fruit weight/plant (MFFW/P, g), fruit growth period (FGP,
days), and total yield/plant (TY/P, g) of eggplant (Solanum melongena)
grown in greenhouses. All parameters except days to flowering and fruit growth
period showed a sharp curvilinear response to temperature at all light intensities,
with lower values either side of an optimum temperature. Days to flowering
showed little response to temperature at 7 MJ/m2 per day of light but decreased
with temperature at 3 MJ/m2 per day. Optimum temperature for each attribute
increased with increasing light intensity except for flower bud number. FD,
FN/P, and TY/P showed a slight curvilinear response to light intensity at all
temperatures except that days to flowering and fruit number per plant showed
a sharp curvilinear decline at higher temperatures. FBN/P and MFFW/P showed
a sharp linear response to light intensity at lower temperatures and a slight
curvilinear response at higher temperatures. At all temperatures, FGP was a
sharp linear function of light intensity. The derived relationships provide
the potential for optimising growth and fruiting of eggplant in greenhouses,
but need to be validated under commercial conditions.
Keywords fruiting; phenology; development and yield parameters;
temperature; light; eggplant
New Zealand Journal of Crop and Horticultural Science, 2007, Vol. 35:
51–59
0014–0671/07/3501–0051 © The Royal
Society of New Zealand 2007
H05165; Online publication date 2 March 2007. Received 23 December
2005; accepted 13 July 2006
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