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ISHS Acta Horticulturae 1130: XXIX International Horticultural Congress on Horticulture: Sustaining Lives, Livelihoods and Landscapes (IHC2014): International Symposia on the Physiology of Perennial Fruit Crops and Production Systems and Mechanisation, Precision Horticulture and Robotics

Effect of elevated CO2 concentration on sugar accumulation and biomass allocation of Lycium barbarum

Authors:   B. Cao, J.D. Hou, L.H. Song, J. Pan
Keywords:   Chinese wolfberry, photosynthetic production, sucrose, leaf mass, root mass
DOI:   10.17660/ActaHortic.2016.1130.10
Abstract:
The climate change mainly caused by elevated atmosphere CO2 concentration has been affecting plant growth and physiology, which has been paid much attention recently. But it is still unknown how elevated CO2 concentration affects the growth of Lycium barbarum which is a unique and well-known tree species in Ningxia, China. To study the effects of elevated CO2 concentration on sugar accumulation in Lycium barbarum, the seedlings of L. barbarum were exposed to either ambient [CO2] (35020 μmol mol-1) or elevated [CO2] (70020 μmol mol-1) in open top chambers, and after one growing season, the sugar contents in leaf, fruit, stem, and root of L. barbarum were tested. The result showed that the sugar contents and starch content in leaf were decreased by elevated CO2 concentration treatment, but the contents of sugar and starch in stem and root of L. barbarum were increased. The results also determined that sugar contents in fruit were decreased by elevated CO2 concentration, and the root mass of the elevated CO2 concentration treatment was higher than that of control group. All these indicated that elected CO2 concentration affect the allocation of photosynthetic production and that more sugar were accumulated in root.

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