Chin J Plant Ecol ›› 2011, Vol. 35 ›› Issue (1): 73-81.DOI: 10.3724/SP.J.1258.2011.00073
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LI Xiu-Yuan1, LIU Xi-Ping1,*(), Hang DUONG2, Roger KJELGREN2
Received:
2010-04-16
Accepted:
2010-08-31
Online:
2011-04-16
Published:
2011-01-24
Contact:
LIU Xi-Ping
LI Xiu-Yuan, LIU Xi-Ping, Hang DUONG, Roger KJELGREN. Comparison of water-related physiological characteristics of Alnus maritima and A. incana growing in America[J]. Chin J Plant Ecol, 2011, 35(1): 73-81.
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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2011.00073
Fig. 1 Diurnal variation of stomotal conductance (Gs) (A) and leaf water potential (ψleaf ) (B) of Alnus maritima and A. incana under normal water condition. a and b indicate significance of Gs or ψleaf between A. maritima and A. incana at the same time at 0. 01 level by Duncan test.
水汽压亏缺 Vapor pressure deificit | 太阳辐射 Solar radiation | 空气温度 Air temperature | 相对湿度 Relative humidity | |
---|---|---|---|---|
海滨桤木 Alnus maritima | -0.549** | 0.027 | -0.560** | 0.501** |
薄叶桤木 A. incana | -0.695** | 0.096 | -0.720** | 0.700** |
Table 1 Correlation coefficients between stomatal conductance (Gs) of Alnus maritima and A. incana and meteorological variables (vapor pressure deficit, solar radiation, air temperature and relative humidity)
水汽压亏缺 Vapor pressure deificit | 太阳辐射 Solar radiation | 空气温度 Air temperature | 相对湿度 Relative humidity | |
---|---|---|---|---|
海滨桤木 Alnus maritima | -0.549** | 0.027 | -0.560** | 0.501** |
薄叶桤木 A. incana | -0.695** | 0.096 | -0.720** | 0.700** |
Fig. 3 Variation of stomatal conductance (Gs) and leaf water potential (ψleaf) of Alnus maritima and A. incana under drought stress treatments. A, B, C and D represent the Gs mid-morning value of well watered treatment, drought stress treatment, and the mid-afternoon Gs value of these two treatments, respectively. E and F represent the ψleaf values of well watered and drought stress treatments, respectively. a, b, c and d indicate the significance between A. maritima and A. incana at 0. 01 level by Duncan test.
树种 Species | 天数 Day | |||||
---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | |
海滨桤木 Alnus maritima | 14.01 | 24.11 | 26.34 | 41.00 | 61.25 | 72.41 |
薄叶桤木 A. incana | 0.98 | 3.51 | 10.03 | 35.69 | 67.10 | 88.04 |
Table 2 Decrease in percentage of stomatal conductance (Gs) under drought stress in Alnus maritima and A. incana (1- Gsdrought- stressed/ Gswell-watered) (%)
树种 Species | 天数 Day | |||||
---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | |
海滨桤木 Alnus maritima | 14.01 | 24.11 | 26.34 | 41.00 | 61.25 | 72.41 |
薄叶桤木 A. incana | 0.98 | 3.51 | 10.03 | 35.69 | 67.10 | 88.04 |
Fig. 4 Relationship between the water potential (ψleaf) ratio of drought stressed to well watered and the stomatal conductance (Gs) ratio of drought stressed to well watered for Alnus maritima and A. incana. —— and represent the regression lines of A. maritima and A. incana, respectively.
Fig. 5 Changes in stomatal conductance (Gs) of Alnus maritima and A. incana after well-rewatered treatment. A, B, C and D see Fig. 3. a, b, c and d indicate significance between A. maritima and A. incana at the same day at 0.05 level by Duncan test.
处理 Treatment | 饱和渗透势 Solute potential at full turgor ψssat | 失膨点渗透势 Solute potential at turgor loss point ψstlp | 渗透势调节范围 Dψs (ψssat-ψstlp) |
---|---|---|---|
海滨桤木-充分灌溉 Alnus maritime-well watered | -0.92a | -1.29a | 0.38a |
海滨桤木-干旱胁迫 A. maritime-drought stress | -1.08b | -1.11c | 0.03c |
薄叶桤木-充分灌溉 A. incana-well watered | -0.91a | -1.35a | 0.44a |
薄叶桤木-干旱胁迫 A. incana-drought stress | -1.04b | -1.27b | 0.24b |
Table 3 Parameters of osmotic adjustment for Alnus maritima and A. incana (MPa)
处理 Treatment | 饱和渗透势 Solute potential at full turgor ψssat | 失膨点渗透势 Solute potential at turgor loss point ψstlp | 渗透势调节范围 Dψs (ψssat-ψstlp) |
---|---|---|---|
海滨桤木-充分灌溉 Alnus maritime-well watered | -0.92a | -1.29a | 0.38a |
海滨桤木-干旱胁迫 A. maritime-drought stress | -1.08b | -1.11c | 0.03c |
薄叶桤木-充分灌溉 A. incana-well watered | -0.91a | -1.35a | 0.44a |
薄叶桤木-干旱胁迫 A. incana-drought stress | -1.04b | -1.27b | 0.24b |
处理 Treatment | 海滨桤木-充分灌溉 Alnus maritime-well watered | 海滨桤木-干旱胁迫 A. maritime-drought stress | 薄叶桤木-充分灌溉 A. incana-well watered | 薄叶桤木-干旱胁迫 A. incana-drought stress |
---|---|---|---|---|
R2 | 0.996 | 0.997 | 0.998 | 0.997 |
k | 0.864a | 0.793b | 0.768b | 0.685b |
Table 4 The slopes (k) of linear equation between leaf water potential (ψleaf ) and turgor (ψp ) of Alnus maritima and A. incana
处理 Treatment | 海滨桤木-充分灌溉 Alnus maritime-well watered | 海滨桤木-干旱胁迫 A. maritime-drought stress | 薄叶桤木-充分灌溉 A. incana-well watered | 薄叶桤木-干旱胁迫 A. incana-drought stress |
---|---|---|---|---|
R2 | 0.996 | 0.997 | 0.998 | 0.997 |
k | 0.864a | 0.793b | 0.768b | 0.685b |
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