Internal temperature of Douglas-fir buds is altered at elevated temperature

Pseudotsuga menziesii (Douglas-fir) saplings were grown in sun-lit controlled environment chambers at ambient or elevated (+4°C above ambient) temperature. We measured internal temperatures of vegetative buds with thermocouple probes and compared temperatures of normal buds and abnormal buds with lo...

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Bibliographic Details
Published in:Environmental and experimental botany 1999-02, Vol.41 (1), p.25-30
Main Authors: Apple, Martha E., Lucash, Melissa S., Phillips, Donald L., Olszyk, David M., Tingey, David T.
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Biological and medical sciences
Bud
Climate
Douglas-fir
Economic plant physiology
Fundamental and applied biological sciences. Psychology
Growth and development
Morphogenesis, differentiation, rhizogenesis, tuberization. Senescence
Morphology
Physical agents
Plant physiology and development
Pseudotsuga menziesii
Temperature
Vegetative apparatus, growth and morphogenesis. Senescence
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Summary:Pseudotsuga menziesii (Douglas-fir) saplings were grown in sun-lit controlled environment chambers at ambient or elevated (+4°C above ambient) temperature. We measured internal temperatures of vegetative buds with thermocouple probes and compared temperatures of normal buds and abnormal buds with loosened, rosetted outer scales in elevated temperature chambers. The abnormal buds had higher and earlier peak daily temperatures than normal buds. Elevated temperature may influence the internal temperature of buds and contribute to the development of abnormal, rosetted buds with loosened outer scales. Abnormal bud development may alter branching patterns and allometry of Douglas-fir trees subjected to climatic change.
ISSN:0098-8472
1873-7307
DOI:10.1016/S0098-8472(98)00046-X