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, Long-Long Lu International Joint Research Laboratory for Global Change Ecology , School of Life Sciences, Henan University , Kaifeng 475004, Henan , China Search for other works by this author on: Oxford Academic Hao Liu International Joint Research Laboratory for Global Change Ecology , School of Life Sciences, Henan University , Kaifeng 475004, Henan , China Search for other works by this author on: Oxford Academic Kun-Peng Zhao International Joint Research Laboratory for Global Change Ecology , School of Life Sciences, Henan University , Kaifeng 475004, Henan , China Search for other works by this author on: Oxford Academic Jing Wang International Joint Research Laboratory for Global Change Ecology , School of Life Sciences, Henan University , Kaifeng 475004, Henan , China Search for other works by this author on: Oxford Academic Yuan Miao International Joint Research Laboratory for Global Change Ecology , School of Life Sciences, Henan University , Kaifeng 475004, Henan , China Search for other works by this author on: Oxford Academic Hai-Chang Lin International Joint Research Laboratory for Global Change Ecology , School of Life Sciences, Henan University , Kaifeng 475004, Henan , China Search for other works by this author on: Oxford Academic Guang-You Hao CAS Key Laboratory of Forest Ecology and Management , Institute of Applied Ecology, Chinese Academy of Sciences , Shenyang 110016, Liaoning , China Corresponding authors: G.-Y. Hao (haogy@iae.ac.cn); S.-J. Han (hansj@iae.ac.cn) Search for other works by this author on: Oxford Academic Shi-Jie Han International Joint Research Laboratory for Global Change Ecology , School of Life Sciences, Henan University , Kaifeng 475004, Henan , China Corresponding authors: G.-Y. Hao (haogy@iae.ac.cn); S.-J. Han (hansj@iae.ac.cn) Search for other works by this author on: Oxford Academic
https://orcid.org/0000-0003-4173-3692 Tree Physiology, tpae042, https://doi.org/10.1093/treephys/tpae042
Published:
11 April 2024
Article history
Received:
19 July 2023
Revision received:
30 January 2024
Accepted:
03 April 2024
Published:
11 April 2024
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Long-Long Lu, Hao Liu, Kun-Peng Zhao, Jing Wang, Yuan Miao, Hai-Chang Lin, Guang-You Hao, Shi-Jie Han, Seasonal patterns of nonstructural carbohydrate storage and mobilization in two tree species with distinct life-history traits, Tree Physiology, 2024;, tpae042, https://doi.org/10.1093/treephys/tpae042
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Abstract
Nonstructural carbohydrates (NSC) are essential for tree growth and adaptation, yet our understanding of the seasonal storage and mobilization dynamics of whole-tree NSC is still limited, especially when tree functional types are involved. Here, Quercus acutissima Carruth. and Pinus massoniana Lamb. with distinct life-history traits (i.e., a deciduous broadleaf species vs. an evergreen coniferous species) were studied to assess the size and seasonal fluctuations of organ and whole-tree NSC pools with a focus on comparing differences in carbon resource mobilization patterns between the two species. We sampled the organs (leaf, branch, stem, and root) of the target trees repeatedly over four seasons of the year. Then, NSC concentrations in each organ were paired with biomass estimates from the allometric model to generate whole-tree NSC pools. The seasonal dynamics of the whole-tree NSC of Q. acutissima and P. massoniana reached the peak in autumn and summer, respectively. The starch pools of the two species were supplemented in the growing season while the soluble sugar pools were the largest in the dormant season. Seasonal dynamics of organ-level NSC concentrations and pools were affected by organ type and tree species, with above-ground organs generally increasing during the growing season and P. massoniana roots decreasing during the growing season. In addition, the whole-tree NSC pools of P. massoniana were larger but Q. acutissima showed larger seasonal fluctuations, indicating that larger storage was not associated with more pronounced seasonal fluctuations. We also found that the branch and root were the most dynamic organs of Q. acutissima and P. massoniana, respectively, and were the major suppliers of NSC to support tree growth activities. These results provide fundamental insights into the dynamics and mobilization patterns of NSC at the whole-tree level, and have important implications for investigating environmental adaptions of different tree functional types.
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