Plant growth strategy determines the magnitude and direction of drought-induced changes in root exudates in subtropical forests

Plant growth strategy determines the magnitude and direction of drought-induced changes in root exudates in subtropical forests

© 2023 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 29(2023), 12 vom: 28. Juni, Seite 3476-3488
1. Verfasser: Jiang, Zheng (VerfasserIn)
Weitere Verfasser: Fu, Yuling, Zhou, Lingyan, He, Yanghui, Zhou, Guiyao, Dietrich, Peter, Long, Jilan, Wang, Xinxin, Jia, Shuxian, Ji, Yuhuang, Jia, Zhen, Song, Bingqian, Liu, Ruiqiang, Zhou, Xuhui
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article amino acid drought mycorrhizal infection organic acid root exudation root morphological traits subtropical forests tree growth Organic Chemicals mehr... Amino Acids Soil Sugars Plant Exudates
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520 |a Root exudates are an important pathway for plant-microbial interactions and are highly sensitive to climate change. However, how extreme drought affects root exudates and the main components, as well as species-specific differences in response magnitude and direction, are poorly understood. In this study, root exudation rates of total carbon (C) and its components (e.g., sugar, organic acid, and amino acid) were measured under the control and extreme drought treatments (i.e., 70% throughfall reduction) by in situ collection of four tree species with different growth rates in a subtropical forest. We also quantified soil properties, root morphological traits, and mycorrhizal infection rates to examine the driving factors underlying variations in root exudation. Our results showed that extreme drought significantly decreased root exudation rates of total C, sugar, and amino acid by 17.8%, 30.8%, and 35.0%, respectively, but increased root exudation rate of organic acid by 38.6%, which were largely associated with drought-induced changes in tree growth rates, root morphological traits, and mycorrhizal infection rates. Specifically, trees with relatively high growth rates were more responsive to drought for root exudation rates compared with those with relatively low growth rates, which were closely related to root morphological traits and mycorrhizal infection rates. These findings highlight the importance of plant growth strategy in mediating drought-induced changes in root exudation rates. The coordinations among root exudation rates, root morphological traits, and mycorrhizal symbioses in response to drought could be incorporated into land surface models to improve the prediction of climate change impacts on rhizosphere C dynamics in forest ecosystems 
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650 4 |a amino acid 
650 4 |a drought 
650 4 |a mycorrhizal infection 
650 4 |a organic acid 
650 4 |a root exudation 
650 4 |a root morphological traits 
650 4 |a subtropical forests 
650 4 |a tree growth 
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650 7 |a Amino Acids  |2 NLM 
650 7 |a Soil  |2 NLM 
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650 7 |a Plant Exudates  |2 NLM 
700 1 |a Fu, Yuling  |e verfasserin  |4 aut 
700 1 |a Zhou, Lingyan  |e verfasserin  |4 aut 
700 1 |a He, Yanghui  |e verfasserin  |4 aut 
700 1 |a Zhou, Guiyao  |e verfasserin  |4 aut 
700 1 |a Dietrich, Peter  |e verfasserin  |4 aut 
700 1 |a Long, Jilan  |e verfasserin  |4 aut 
700 1 |a Wang, Xinxin  |e verfasserin  |4 aut 
700 1 |a Jia, Shuxian  |e verfasserin  |4 aut 
700 1 |a Ji, Yuhuang  |e verfasserin  |4 aut 
700 1 |a Jia, Zhen  |e verfasserin  |4 aut 
700 1 |a Song, Bingqian  |e verfasserin  |4 aut 
700 1 |a Liu, Ruiqiang  |e verfasserin  |4 aut 
700 1 |a Zhou, Xuhui  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Global change biology  |d 1999  |g 29(2023), 12 vom: 28. Juni, Seite 3476-3488  |w (DE-627)NLM098239996  |x 1365-2486  |7 nnns 
773 1 8 |g volume:29  |g year:2023  |g number:12  |g day:28  |g month:06  |g pages:3476-3488 
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