Chin J Plan Ecolo ›› 2015, Vol. 39 ›› Issue (1): 81-91.DOI: 10.17521/cjpe.2015.0009
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Received:
2014-09-28
Accepted:
2014-12-09
Online:
2015-01-10
Published:
2015-01-22
Contact:
Hong-Hua ZHOU
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# Co-first authors
ZHOU Hong-Hua,LI Wei-Hong. Responses and adaptation of xylem hydraulic conductivity to salt stress in Populus euphratica[J]. Chin J Plan Ecolo, 2015, 39(1): 81-91.
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Fig. 1 Diurnal changes in stomatal conductance (Gs) of leaves in Populus euphratica seedlings under different concentration salt stresses (mean ± SE). Different letters indicate significant differences (p < 0.05, LSD). Control, 0 mol·L-1 NaCl; S1, 0.05 mol·L-1 NaCl; S2, 0.15 mol·L-1 NaCl; S3, 0.30 mol·L-1 NaCl.
Fig. 2 Hydraulic conductivity of roots and stems of Populus euphratica seedlings under different concentration salt stresses (mean ± SE). Ks0, initial hydraulic conductivity per unit volume. Ksmax, maximum hydraulic conductivity. Different letters indicate significant differences (p < 0.05, LSD). Control, 0 mol·L-1 NaCl; S1, 0.05 mol·L-1 NaCl; S2, 0.15 mol·L-1 NaCl; S3, 0.30 mol·L-1 NaCl.
Fig. 3 Curves of xylem vulnerability to cavitation in roots and stems of Populus euphratica seedlings under different concentration salt stresses (mean ± SE). PLC, percentage loss of hydraulic conductivity. Control, 0 mol·L-1 NaCl; S1, 0.05 mol·L-1 NaCl; S2, 0.15 mol·L-1 NaCl; S3, 0.30 mol·L-1 NaCl.
Fig. 4 Anatomical structure of stem xylem vessels in Populus euphratica seedlings under different concentration salt stresses (mean ± SE). Control, 0 mol·L-1 NaCl; S1, 0.05 mol·L-1 NaCl; S2, 0.15 mol·L-1 NaCl; S3, 0.30 mol·L-1 NaCl.
Fig. 5 Root morphology and distribution of Populus euphratica seedlings under different concentration salt stresses. A, control level (0 mol·L-1 NaCl solution); B, S1 level (0.05 mol·L-1 NaCl solution); C, S2 level (0.15 mol·L-1 NaCl solution); D, S3 level (0.30 mol·L-1 NaCl solution).
Fig. 6 Root characteristics of Populus euphratica seedlings under different concentration salt stresses (mean ± SE). Control, 0 mol·L-1 NaCl; S1, 0.05 mol·L-1 NaCl; S2, 0.15 mol·L-1 NaCl; S3, 0.30 mol·L-1 NaCl.
总根长 Total root length | 总根尖数 No. of total root tips | 0-5 mm根长 0-5 mm root length | 0-5 mm根尖数 No. of 0-5 mm root tips | 5-10 mm根长 5-10 mm root length | 5-10 mm根尖数 No. of 5-10 mm root tips | |
---|---|---|---|---|---|---|
最大比导率 ksmax | 0.567* | 0.841* | 0.631* | 0.854* | 0.604* | 0.538* |
初始比导率 ks0 | 0.494 | 0.800* | 0.565* | 0.815* | 0.538* | 0.460 |
Table 1 Pearson correlation between root characteristics and hydraulic conductivity
总根长 Total root length | 总根尖数 No. of total root tips | 0-5 mm根长 0-5 mm root length | 0-5 mm根尖数 No. of 0-5 mm root tips | 5-10 mm根长 5-10 mm root length | 5-10 mm根尖数 No. of 5-10 mm root tips | |
---|---|---|---|---|---|---|
最大比导率 ksmax | 0.567* | 0.841* | 0.631* | 0.854* | 0.604* | 0.538* |
初始比导率 ks0 | 0.494 | 0.800* | 0.565* | 0.815* | 0.538* | 0.460 |
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