Research press release


Nature Climate Change

Climate change: Mismatch between above- and below-ground plant responses to warming

気候変動に対する植物の応答は、地上部と地下部で異なると考えられることを明らかにした論文が、Nature Climate Change に掲載される。


今回、Xuhui Zhouたちは、88件の公開された研究のデータを解析し、気候変動に対する植物の応答が地上部と地下部で異なることを明らかにした。その差異の程度は、研究対象となった植物のタイプによって異なっていた。例えば、草本植物は、地上部の生育期の開始と終了が早くなり、結果として生育期全体の長さは変わなかったが、地下部の応答に変化はなかった。これに対して、木本植物は、気候温暖化によって地上部の応答に変化はなかったが、地下部の生育期が長くなった。


Plant responses to climate change may differ above and below ground, according to a paper published in Nature Climate Change.

The timing of plant life events — such as the emergence of spring leaves, flowering and the loss of leaves in the autumn — is crucial for their fitness and survival and has important implications for human food resources, ecosystem functioning and carbon cycles worldwide. Climate change has led to shifts in various plant life events, as demonstrated by above-ground changes. However, changes that may be occurring in the soil have been under-investigated — despite the important role of root systems in plant growth and terrestrial ecosystem productivity.

Xuhui Zhou and colleagues analysed data from 88 published studies, revealing a mismatch between above- and below-ground plant responses to climate change, which differ depending on the type of plant investigated. Herbaceous plants, for example, were found to have an earlier start and end to their above-ground growing season, resulting in no change in overall growing season length; however, below-ground responses remained unchanged. By contrast, in woody plants, climate warming did not change above-ground responses but did extend the below-ground growing season.

In their conclusion, the authors emphasize caution in interpreting these results given the study’s small sample size. This is owing to available data constraints, in particular, the limited availability of studies focused on below-ground changes, which can strongly influence plant growth and terrestrial carbon cycles. Subsequently, they suggest that there is an urgent need for further research.

doi: 10.1038/s41558-021-01244-x

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