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Temperature effect on maintenance and growth respiration coefficients of young, field‐grown hinoki cypress ( Chamaecyparis obtusa )
Author(s) -
AduBredu Stephen,
Yokota Taketo,
Hagihara Akio
Publication year - 1997
Publication title -
ecological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.628
H-Index - 68
eISSN - 1440-1703
pISSN - 0912-3814
DOI - 10.1007/bf02529465
Subject(s) - chamaecyparis , respiration , respiration rate , cypress , growth rate , zoology , chemistry , botany , biology , mathematics , geometry
Respiration measurements were made on the entire aboveground parts of young, field‐grown hinoki cypress ( Chamaecyparis obtusa ) trees at monthly intervals over a 5‐year period, to examine the effect of temperature on maintenance and growth respiration coefficients. The respiration rate of the trees was grouped on a monthly basis and then partitioned into maintenance and growth components. The maintenance respiration coefficient increased exponentially with air temperature. The maintenance respiration coefficient at a temperature of 0°C and its Q 10 value were 0.205 mmol CO 2 g −1 d.w. month −1 and 1.81, respectively. The growth respiration coefficient, which was virtually independent of temperature, had a mean value of 38.06±1.95 (SE) mmol CO 2 g −1 d.w. The growth rate increased exponentially with increasing temperature up to a peak at around 18°C, and thereafter declined, thereby resulting in the growth respiration rate being increasingly less sensitive to increasing air temperature. The reported decreases in the Q 10 value of total respiration with increasing air temperature is due to the way in which the growth component of respiration responds to temperature.