Chin J Plant Ecol ›› 2023, Vol. 47 ›› Issue (11): 1576-1584.DOI: 10.17521/cjpe.2022.0262
Special Issue: 全球变化与生态系统
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YU Jun-Rui, WAN Chun-Yan, ZHU Shi-Dan()
Received:
2022-06-22
Accepted:
2023-02-15
Online:
2023-11-20
Published:
2023-03-01
Contact:
ZHU Shi-Dan(Supported by:
YU Jun-Rui, WAN Chun-Yan, ZHU Shi-Dan. Hydraulic vulnerability segmentation in woody plant species from tropical and subtropical karst forests[J]. Chin J Plant Ecol, 2023, 47(11): 1576-1584.
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Fig. 1 Conceptual model of karst mountains landform and distribution of woody plant species. Vulnerability curves of leaves (blue) and stems (red) for trees with positive (A) and negative (B) vulnerability segmentation. The blue and red vertical dashed lines indicate water potential at 50% loss of hydraulic efficiency in leaves (P50leaf) and stems (P50stem), respectively, which qualifies their cavitation resistance. The vulnerability segmentation (P50leaf-stem) is calculated as the difference in cavitation resistance between leaves and stems. Ψ, water potential; PLC, percentage loss of conductivity.
Fig. 2 Vulnerability segmentation (P50leaf-stem) (A) of the 57 woody plant species from tropical and subtropical karst forests, and difference of P50leaf-stem between different plant taxa (B-D). *, p < 0.05; ns, p > 0.05.
Fig. 3 Correlations of vulnerability segmentation (P50leaf-stem) with leaf hydraulic safety margin (HSMleaf) (A), stem hydraulic safety margin (HSMstem) (B), and minimum water potential (Ψmin) (C) across woody plant species from tropical and subtropical karst forests (n = 41). ***, p < 0.001. ○, valley tree species; △, valley shrub species; ●, ridge tree species; ▲, ridge shrub species.
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