Articles
INFLUENCE OF HIGH TEMPERATURE ON FLOWER STEM LENGTH AND PHOTOSYNTHESIS OF ROSES
Article number
454_47
Pages
391 – 398
Language
Abstract
The influence of high temperature on flower stem length and photosynthesis of three rose cultivars (‘Carl Red’, ‘Samantha’ and ‘Carinella’) was investigated.
The flower stem length of greenhouse roses was shorter in August than in May.
In a controlled environment, the flower stem length was shorter at 30°C than at 20°C. The leaf number was almost the same regardless of season and temperature.
Consequently internode length was affected by high temperature, resulting in short stem length.
As for photosynthetic rates, there was no difference between the cultivars at 20°C and those at 30°C. These results indicated that the flower stem length of roses in summer was not related to photosynthetic rate.
The flower stem length of greenhouse roses was shorter in August than in May.
In a controlled environment, the flower stem length was shorter at 30°C than at 20°C. The leaf number was almost the same regardless of season and temperature.
Consequently internode length was affected by high temperature, resulting in short stem length.
As for photosynthetic rates, there was no difference between the cultivars at 20°C and those at 30°C. These results indicated that the flower stem length of roses in summer was not related to photosynthetic rate.
Authors
H. Yamaguchi, Y. Hirata
Keywords
shoot growth, internode length, Rosa hybrida
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