Chlorophyll Index and Photosynthetic Carbon Sequestration in Northern Eurasia Forests

Voronin, P. Yu.; Коновалов, П. В.; Bolondinskii, V. K.; Kaipiainen, L. K.

doi:10.1023/b:rupp.0000028680.17389.b6

Cited by 2 publications

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“…Using labeled carbon, we found that carbon transfer in phloem per kg of chlorophyll is accompanied by a loss of about 14 kg C per each meter of the pathway for 1100-1200 h of the growth period [31][32][33]. This loss is determined by the tree age distribution in the stand and forms the annual carbon budget, which is called photosynthetic carbon sequestration.…”

Section: Voronin Blackmentioning

confidence: 99%

The importance and place of the photosynthetic carbon sequestration in the organic branch of its global cycle

Voronin

Black

2005

Russ J Plant Physiol

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Results of comparative analysis of turnover times and the capacity of major global pools of organic carbon are presented; the place of photosynthetic carbon sequestration is defined; concept of its catalytic role in the regulation of the organic branch of the global carbon cycle is ground. Concept of reservoir-flux model of photosynthetic carbon sequestration and of the net photosynthetic production at the territory of Northern Eurasia is suggested.

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Section: Voronin Blackmentioning

confidence: 99%

The importance and place of the photosynthetic carbon sequestration in the organic branch of its global cycle

Voronin

Black

2005

Russ J Plant Physiol

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“…In middle-aged taiga stands of northern Eurasia, photosynthetic carbon sequestration equals about 2 tons C/(ha year) [5]. As forests grow older, this carbon flow becomes balanced by carbon losses due to het-erotrophic phytomass respiration [6].…”

Section: Introductionmentioning

confidence: 99%

Prolonged Growth of Young Spruce (Picea koraiensis Nakai) Plants at Double Atmospheric CO2 Concentration Stimulates the Preferential Growth of Thick Roots

Wang

Zhu

et al. 2005

Russ J Plant Physiol

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Two-year-old young spruce ( Picea koraiensis Nakai) plants were grown in a climatic chamber during three summer months at double atmospheric CO 2 concentration, sufficient content of soil inorganic nitrogen, and diurnal variation of temperature and illuminance, which simulate natural growth conditions. The control plants were grown in another climatic chamber under the same conditions, but at atmospheric CO 2 concentration (350 ppm). CO 2 exchange was measured with a Li-Cor 6400 infra-red gas analyzer in attached leaves placed in a climatic chamber in the morning under growth conditions and saturating light 1200 µ E/(m 2 s) in June, July, and August. In addition, dry weights of needles, leafless shoot parts of plant, fraction of thick (more than 0.5 mm in diameter) and thin (less than 0.5 mm in diameter) roots were recorded. The data were used to plot CO 2 exchange rates as a function of carbon dioxide concentration and to calculate the increment of shoot and root phytomass. The maximum gas exchange rates in the treated and control plants similarly depended on CO 2 concentration. The slope of the CO 2 dependence curve, which corresponded to the kinetic characteristic V m / K M of photosynthetic carboxylation, increased monotonically during the experiment. To the end of observation period, the proportion of thick roots in plant phytomass significantly increased in the plants grown at double atmospheric CO 2 concentration, as compared to the control plants. Thus, the increase in the rate of photosynthetic gas exchange in plants grown for three months at double atmospheric CO 2 concentration was only due to the increase in CO 2 , the substrate of Rubisco carboxylation activity. We found no differences in the ëé 2 characteristic for Rubisco between the treated and control plants. The ratio of needle to thin roots in the treated and control plants was similar and did not change during the experiment. The excess of photoassimilates in the treated, as compared to the control plants, was preferentially used for thick root growth. This result shows that photosynthesis in young spruce forests can deposit excess atmospheric CO 2 in the soil horizon in the form of thick root phytomass.

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Chlorophyll Index and Photosynthetic Carbon Sequestration in Northern Eurasia Forests

Cited by 2 publications

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The importance and place of the photosynthetic carbon sequestration in the organic branch of its global cycle

The importance and place of the photosynthetic carbon sequestration in the organic branch of its global cycle

Prolonged Growth of Young Spruce (Picea koraiensis Nakai) Plants at Double Atmospheric CO2 Concentration Stimulates the Preferential Growth of Thick Roots

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