Impact of elevated CO2 concentration under three soil water levels on growth of Cinnamomum camphora

Journal of Zhejiang University. Science. B
Xing-zheng ZhaoMu-qing Qiu

Abstract

Forest plays very important roles in global system with about 35% land area producing about 70% of total land net production. It is important to consider both elevated CO(2) concentrations and different soil moisture when the possible effects of elevated CO(2) concentration on trees are assessed. In this study, we grew Cinnamomum camphora seedlings under two CO(2) concentrations (350 micromol/mol and 500 micromol/mol) and three soil moisture levels [80%, 60% and 40% FWC (field water capacity)] to focus on the effects of exposure of trees to elevated CO(2) on underground and aboveground plant growth, and its dependence on soil moisture. The results indicated that high CO(2) concentration has no significant effects on shoot height but significantly impacts shoot weight and ratio of shoot weight to height under three soil moisture levels. The response of root growth to CO(2) enrichment is just reversed, there are obvious effects on root length growth, but no effects on root weight growth and ratio of root weight to length. The CO(2) enrichment decreased 20.42%, 32.78%, 20.59% of weight ratio of root to shoot under 40%, 60% and 80% FWC soil water conditions, respectively. And elevated CO(2) concentration significantly increased the...Continue Reading

References

Feb 24, 2001·Nature·Q Schiermeier
Apr 9, 2001·Science·S L LaDeau, J S Clark
Apr 20, 2001·Current Opinion in Plant Biology·G M Coruzzi, L Zhou
Apr 19, 2002·Current Opinion in Plant Biology·F Ian Woodward
Jan 1, 1998·Oecologia·Peter S Curtis, Xianzhong Wang

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Citations

Sep 24, 2018·Functional & Integrative Genomics·Thangasamy SaminathanUmesh K Reddy

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