Photosynthetica

, Volume 50, Issue 2, pp 317–320 | Cite as

Photosynthesis-nitrogen relationship in a Hinoki cypress (Chamaecyparis obtusa) canopy: a comparison with Japanese cedar (Cryptomeria japonica)

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Abstract

The relationship between light-saturated photosynthetic capacity (P max) and leaf nitrogen (N) content was investigated for one year in a 15-year-old Chamaecyparis obtusa canopy and was compared with a Cryptomeria japonica canopy previously described. The linear regression between P max and leaf N content tended to converge toward a single line segment from July to January and in May for C. obtusa. The slope of the linear regression between P max and leaf N content of C. obtusa was gentler than that of C. japonica. The smaller regression coefficient of C. obtusa may reflect species differences in nitrogen nutrition requirements between C. obtusa and C. japonica. A pronounced decrease in the slope of the linear regression lines due to low temperature was observed in February and March. During this period, P max of C. obtusa declined more than that of C. japonica suggesting that C. obtusa is less tolerant to low temperatures than C. japonica.

Additional key words

leaf nitrogen content photosynthetic capacity species difference winter depression 

Abbreviations

N

nitrogen

Pmax

light-saturated photosynthetic capacity

PPFD

photosynthetic photon flux density

R-PPFD

relative photosynthetic photon flux density

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  1. 1.Research Institute of Kyushu University ForestsFukuokaJapan
  2. 2.Graduate School of Bioresource and Bioenvironmental SciencesKyushu UniversityFukuokaJapan

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