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Impact of elevated CO2 on root traits of a sapling community of three birches and an oak : a free-air-CO2 enrichment (FACE) in northern Japan

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Title: Impact of elevated CO2 on root traits of a sapling community of three birches and an oak : a free-air-CO2 enrichment (FACE) in northern Japan
Authors: Agathokleous, Evgenios Browse this author
Watanabe, Makoto Browse this author
Nakaji, Tatsuro Browse this author →KAKEN DB
Wang, Xiaona Browse this author
Satoh, Fuyuki Browse this author →KAKEN DB
Koike, Takayoshi Browse this author →KAKEN DB
Keywords: Birch
Elevated CO2
FACE
Oak
Root
Volcanic ash soil
Issue Date: Apr-2016
Publisher: Springer
Journal Title: Trees : structure and function
Volume: 30
Issue: 2
Start Page: 353
End Page: 362
Publisher DOI: 10.1007/s00468-015-1272-6
Abstract: We evaluated the root response to elevated CO2 fumigation of 3 birches (Betula sp.) and 1 deciduous oak (Quercus sp.) grown in immature volcanic ash soil (VA) or brown forest soil (BF). VA is a nutrient-poor, phosphorus-impoverished soil, broadly distributed in northern Japan. Each species had been exposed to either ambient (375-395 mu mol mol(-1)) (aCO(2)) or elevated (500 mu mol mol(-1)) (eCO(2)) CO2 during the daytime (more than 70 mu mol m(-2) s(-1)) over 4 growing seasons. The results suggest that eCO(2) did not cause an increase in total root production when the community had grown in fertile BF soil, however, it did cause a large increase when the community was grown in infertile VA soil. Yet, carbon allocation to plant roots was not affected by eCO(2) in either the BF or VA soils. Rhizo-morphogenesis appeared to occur to a greater extent under eCO(2). It seems that the saplings developed a massive amount of fine roots under the VA and eCO(2) conditions. Unexpectedly, eCO(2) resulted in a larger total root mass when the community was grown in VA soil than when grown in BF soil (eCO(2) x VA vs. eCO(2) x BF). These results may hint to a site-specific potential of communities to sequester future atmospheric carbon. The growing substance of plants is an important factor which root response to eCO(2) depends on, however, further studies are needed for a better understanding.
Rights: The final publication is available at link.springer.com.
Type: article (author version)
URI: http://hdl.handle.net/2115/64926
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小池 孝良

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