ISHS Acta Horticulturae 139: Fruit Set and Development, XXI IHC
EFFECT OF SOIL AND AIR TEMPERATURE ON GROWTH AND FLOWER FORMATION OF PURPLE PASSIONFRUIT (PASSIFLORA EDULIS SIMS VAR. EDULIS) |
| Authors: | P. Simon, A. Karnatz |
| Abstract:
Fluctuating air temperature between 20 and 30°C and constant soil temperatures of 23°C and 28°C increased vegetative growth and the number of flower buds of rooted purple passionfruit cuttings. But in spite of a higher number of buds on plants in this air temperature the number of fruits was lower than on plants in a cooler fluctuating air temperature between 15 and 25°C. Soil temperatures of 18°C and 33°C reduced number of flower buds, flowers and fruits when compared with 23°C, 28°C or a fluctuating soil temperature. Young, rapidly growing fruits reduced shoot growth, number of flowers, and fruit set. | |
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