Olavi Luukkanen. (1973). Havaintoja kuusen vapaapölytysjälkeläistöjen ja männyn metsikköalkuperien CO2-aineenvaihdunnasta. Silva Fennica vol. 7 no. 4 article id 4888. https://doi.org/10.14214/sf.a14726

English title: Observations on CO2 exchange in open pollinated progenies of Norway spruce and provenances of Scots pine.

Original keywords: kuusi; mänty; metsänjalostus; pluspuu; fotosynteesi; geneettinen muuntelu; pimeähengitys; yhteyttämisteho

English keywords: Pinus sylvestris; Norway spruce; Picea abies; Scots pine; tree breeding; photosynthesis capacity; genetic variance; dark respiration

Abstract | View details | Full text in PDF | Author Info

Photosynthesis and dark respiration in five families of autochtonous Norway spruce (Picea abies (L.) H. Karst.) and in seedlings from twenty Finnish stands of Scots pine (Pinus sylvestris L.) were investigated in constant environmental conditions. Values of CO₂ exchange were compared with the height growth and weight of seedlings in Norway spruce and with the weight alone in Scots pine. No statistically significant differences were found in CO₂ exchange among progenies or stands. Photosynthetic efficiency and photosynthetic capacity showed a positive correlation both in spruce and in pine. Growth and net photosynthetic capacity were linearly and positively correlated in pine. Spruce and a higher light compensation point than pine. The use of an open IRGA system with several simultaneous measurements and the trap-type cuvette construction in genetic work are discussed.

The PDF includes a summary in English.

Luukkanen, E-mail: ol@mm.unknown

article id 4863, category Article

Olavi Luukkanen. (1972). Metsäpuiden fotosynteesin geneettinen vaihtelu. Silva Fennica vol. 6 no. 2 article id 4863. https://doi.org/10.14214/sf.a14666

English title: Genetic variation of photosynthesis in forest trees.

Original keywords: fotosynteesi; geneettinen muuntelu; hengitys; fotorespiraatio; poppeli; hiilidioksidi; kaasuaineenvaihdunta

English keywords: photosynthesis; carbon dioxide; photorespiration; CO2 exhange

Abstract | View details | Full text in PDF | Author Info

In the literature review the current status of information on the genetic variation of CO₂ exchange and some reviews and investigations on this subject are listed. Photorespiration is separately discussed and unpublished data of an electron microscope study of poplar leaf microbodies are presented.

Considerable genetic inter- and intraspecific variation is found in several characteristics that affect CO₂ exchange in trees. Photosynthesis in young trees does not correlate well with growth through the whole rotation cycle. A special interest has been shown to marginal environmental conditions (e.g. water deficit, low temperature, and low light intensity), as opposed to optimal conditions often employed in laboratory studies of CO₂ exchange in trees.

In an unpublished poplar studies by the author et.al. a preliminary experiment with poplar clones showed variation in the CO₂ competition point. This variation was negatively correlated with the photosynthesis efficiency of these clones.

The PDF includes a summary in English.

Luukkanen, E-mail: ol@mm.unknown

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