浙江农业学报 ›› 2021, Vol. 33 ›› Issue (8): 1416-1425.DOI: 10.3969/j.issn.1004-1524.2021.08.09
收稿日期:
2020-12-15
出版日期:
2021-08-25
发布日期:
2021-08-27
通讯作者:
芦建国
作者简介:
*芦建国,E-mail: ljgnj@nju.edu.cn基金资助:
ZHOU Beining(), MAO Lian, HUA Zhuangzhuang, LU Jianguo*(
)
Received:
2020-12-15
Online:
2021-08-25
Published:
2021-08-27
Contact:
LU Jianguo
摘要:
以3年生夏蜡梅实生苗为试验材料,采用CK、0.1%、0.2%、0.3%、0.4%、0.5%、0.6%、0.7%八个碱性盐(NaHCO3)处理水平,探究不同碱性盐胁迫对夏蜡梅光合荧光特性的影响,为夏蜡梅的生产实践栽培提供理论指导。结果表明,在NaHCO3胁迫下,夏蜡梅净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)、水分利用率(WUE)、最大净光合速率(Pnmax)和光饱和点(LSP)等光合指标均呈下降趋势且浓度越高下降越显著,胞间CO2浓度(Ci)呈先降低后升高趋势,光补偿点(LCP)则呈上升趋势;随着NaHCO3浓度的升高,夏蜡梅叶片的OJIP曲线逐渐出现明显K点,Fo先降低后升高,Fm、Fv、Fv/Fm和Fv/Fo呈现先升高后降低的趋势,叶片单位反应中心吸收的光能ABS/RC、热耗散的能量DIo/RC与捕获的用于还原QA的能量TRo/RC均呈先下降后上升趋势,而用于单位反应中心电子传递的能量ETo/RC逐渐下降。碱性盐胁迫对夏蜡梅的光合系统造成了损伤,且浓度越高损伤程度越大;低浓度NaHCO3胁迫导致夏蜡梅气孔限制净光合速率Pn降低,其对夏蜡梅叶片光化学荧光性能的抑制作用较弱,适当提高了PSⅡ反应中心活性;高浓度(>0.3%)胁迫导致夏蜡梅净光合速率Pn下降的原因可能是非气孔限制,严重破坏PSⅡ反应中心供体侧、受体侧,并导致大部分PSⅡ反应中心失活。
中图分类号:
周贝宁, 毛恋, 花壮壮, 芦建国. 碱性盐胁迫对夏蜡梅光合荧光特性影响[J]. 浙江农业学报, 2021, 33(8): 1416-1425.
ZHOU Beining, MAO Lian, HUA Zhuangzhuang, LU Jianguo. Effects on photochemical fluorescence properties under salt-alkaline stresses about Sinocalycanthus chinensis[J]. Acta Agriculturae Zhejiangensis, 2021, 33(8): 1416-1425.
图1 碱性盐胁迫对夏蜡梅净光合速率和蒸腾速率的影响 小写字母不同表示差异显著(P<0.05),大写字母不同表示差异极显著(P<0.01),相同字母表示差异不显著。下同。
Fig.1 Effect of alkaline salt stress on net photosynthetic and transpiration rate of Sinocalycanthus chinensis Different lowercase letters indicated significant differences at P<0.05, Different uppercase letters indicated significant differences at P<0.01, The same letters indicated insignificant differences.The same as below.
处理 Treatment/% | 最大净光合速率 Pnmax/(μmol· m-2·s-1) | 光饱和点 LSP/(μmol· m-2·s-1) | 光补偿点 LCP/(μmol· m-2·s-1) | 暗呼吸速率 Rd/(μmol· m-2·s-1) | 表观量子效率 AQE/(mol· mol-1) |
---|---|---|---|---|---|
CK | 2.231 9±0.017 6 Aa | 912.84±1.87 Aa | 5.65±0.10 Eg | 0.212 6±0.000 1 CcD | 0.040 7±0.002 9 Aa |
0.1 | 2.043 2±0.039 9 Bb | 842.69±7.37 Bb | 6.78±0.34 Ef | 0.157 7±0.005 2 Ed | 0.024 7±0.000 9 Bb |
0.2 | 1.356 3±0.007 3 Cc | 796.85±16.33 Cc | 13.43±1.03 De | 0.263 9±0.004 0 Aa | 0.022 7±0.000 6 BbCc |
0.3 | 0.991 6±0.000 5 Dd | 797.73±14.46 Cc | 13.94±0.44 De | 0.231 1±0.005 3 BbC | 0.019 8±0.000 7 BCcDd |
0.4 | 0.940 4±0.010 9 De | 658.89±7.91 Dd | 16.94±1.22 Cd | 0.242 2±0.005 5 Bb | 0.017 1±0.000 1 Dd |
0.5 | 0.303 4±0.002 1 Ef | 578.94±3.58 Ee | 17.93±0.61 Cc | 0.070 1±0.006 2 Gf | 0.004 5±0.000 2 Ee |
0.6 | 0.196 9±0.000 3 Fg | 446.95 ±0.73 Ff | 19.20±0.73 Bb | 0.201 1±0.005 4 cD | 0.019 4±0.000 1 CcDd |
0.7 | 0.160 5±0.006 4 Fg | 430.98±4.28 Ff | 21.34±0.08 Aa | 0.092 7±0.001 6 Fe | 0.006 2±0.000 5 Ee |
表1 碱性盐胁迫下夏蜡梅光合响应参数的变化
Table 1 Changes in Photosynthetic response parameter of Sinocalycanthus chinensis under alkaline salt stress
处理 Treatment/% | 最大净光合速率 Pnmax/(μmol· m-2·s-1) | 光饱和点 LSP/(μmol· m-2·s-1) | 光补偿点 LCP/(μmol· m-2·s-1) | 暗呼吸速率 Rd/(μmol· m-2·s-1) | 表观量子效率 AQE/(mol· mol-1) |
---|---|---|---|---|---|
CK | 2.231 9±0.017 6 Aa | 912.84±1.87 Aa | 5.65±0.10 Eg | 0.212 6±0.000 1 CcD | 0.040 7±0.002 9 Aa |
0.1 | 2.043 2±0.039 9 Bb | 842.69±7.37 Bb | 6.78±0.34 Ef | 0.157 7±0.005 2 Ed | 0.024 7±0.000 9 Bb |
0.2 | 1.356 3±0.007 3 Cc | 796.85±16.33 Cc | 13.43±1.03 De | 0.263 9±0.004 0 Aa | 0.022 7±0.000 6 BbCc |
0.3 | 0.991 6±0.000 5 Dd | 797.73±14.46 Cc | 13.94±0.44 De | 0.231 1±0.005 3 BbC | 0.019 8±0.000 7 BCcDd |
0.4 | 0.940 4±0.010 9 De | 658.89±7.91 Dd | 16.94±1.22 Cd | 0.242 2±0.005 5 Bb | 0.017 1±0.000 1 Dd |
0.5 | 0.303 4±0.002 1 Ef | 578.94±3.58 Ee | 17.93±0.61 Cc | 0.070 1±0.006 2 Gf | 0.004 5±0.000 2 Ee |
0.6 | 0.196 9±0.000 3 Fg | 446.95 ±0.73 Ff | 19.20±0.73 Bb | 0.201 1±0.005 4 cD | 0.019 4±0.000 1 CcDd |
0.7 | 0.160 5±0.006 4 Fg | 430.98±4.28 Ff | 21.34±0.08 Aa | 0.092 7±0.001 6 Fe | 0.006 2±0.000 5 Ee |
图5 碱性盐胁迫下夏蜡梅快速叶绿素荧光诱导动力学曲线的变化
Fig.5 Changes in fast chlorophyll fluorescence induction kinetic curve of Sinocalycanthus chinensis under alkaline salt stress
处理 Treatment/% | 初始荧光 Initialfluorescence (Fo) | 最大荧光 Maximum fluorescence (Fm) | 可变荧光 Variable fluorescence (Fv) | 最大光化学效率 Maximum photochemical efficiency(Fv/Fm) | 潜在光化学效率 Potential photochemical efficiency(Fv/Fo) |
---|---|---|---|---|---|
CK | 442.00±8.50 Bc | 2 346.33±203.48 Aab | 1 916.33±183.15 AaBb | 0.815±0.008 Aab | 4.32±0.34 Aab |
0.1 | 439.33±7.54 Bc | 2 489.00±44.47 Aab | 2 036.33 ±31.75 AaB | 0.818±0.006 Aab | 4.64±0.10 Aab |
0.2 | 423.00±5.86 Bc | 2 391.33±32.05 Aab | 1 980.33±21.53 AaBb | 0.828±0.002 Aa | 4.68±0.05 Aab |
0.3 | 416.33±2.91 Bc | 2 592.33±85.53 Aa | 2 147.33±73.78 Aa | 0.828±0.002 Aa | 5.16±0.14 Aa |
0.4 | 445.00±12.53 Bbc | 2 522.67±88.38 Aab | 2 083.33±79.74 AaB | 0.826±0.003 Aab | 4.69±0.24 Aab |
0.5 | 470.00±3.00 Bbc | 2 494.67±147.38 Aab | 2 024.67±146.78 AaB | 0.810±0.011 Aab | 4.31±0.31 Aab |
0.6 | 503.33±49.08 AaBb | 2 376.00±105.13 Aab | 1 872.67±145.33 AaBb | 0.786±0.030 ABb | 3.84±0.62 ABbc |
0.7 | 552.00±10.97 Aa | 2 189.00±45.21 Ab | 1 637.00±56.15 Bb | 0.747±0.010 Bc | 2.97±0.16 Bc |
表2 碱性盐胁迫下夏蜡梅叶绿素荧光参数的影响
Table 2 Effect of alkaline salt stress on chlorophyll fluorescence parameters of Sinocalycanthus chinensis
处理 Treatment/% | 初始荧光 Initialfluorescence (Fo) | 最大荧光 Maximum fluorescence (Fm) | 可变荧光 Variable fluorescence (Fv) | 最大光化学效率 Maximum photochemical efficiency(Fv/Fm) | 潜在光化学效率 Potential photochemical efficiency(Fv/Fo) |
---|---|---|---|---|---|
CK | 442.00±8.50 Bc | 2 346.33±203.48 Aab | 1 916.33±183.15 AaBb | 0.815±0.008 Aab | 4.32±0.34 Aab |
0.1 | 439.33±7.54 Bc | 2 489.00±44.47 Aab | 2 036.33 ±31.75 AaB | 0.818±0.006 Aab | 4.64±0.10 Aab |
0.2 | 423.00±5.86 Bc | 2 391.33±32.05 Aab | 1 980.33±21.53 AaBb | 0.828±0.002 Aa | 4.68±0.05 Aab |
0.3 | 416.33±2.91 Bc | 2 592.33±85.53 Aa | 2 147.33±73.78 Aa | 0.828±0.002 Aa | 5.16±0.14 Aa |
0.4 | 445.00±12.53 Bbc | 2 522.67±88.38 Aab | 2 083.33±79.74 AaB | 0.826±0.003 Aab | 4.69±0.24 Aab |
0.5 | 470.00±3.00 Bbc | 2 494.67±147.38 Aab | 2 024.67±146.78 AaB | 0.810±0.011 Aab | 4.31±0.31 Aab |
0.6 | 503.33±49.08 AaBb | 2 376.00±105.13 Aab | 1 872.67±145.33 AaBb | 0.786±0.030 ABb | 3.84±0.62 ABbc |
0.7 | 552.00±10.97 Aa | 2 189.00±45.21 Ab | 1 637.00±56.15 Bb | 0.747±0.010 Bc | 2.97±0.16 Bc |
处理 Treatment/% | 单位反应中心吸收的 光能ABS/RC | 单位反应中心热耗散的 能量DIo/RC | 单位反应中心还原QA的 能量TRo/RC | 单位反应中心电子传递的 能量ETo/RC |
---|---|---|---|---|
CK | 2.81±0.22 Aab | 0.52±0.06 Bbc | 2.29±0.16 Aab | 0.807±0.033 Aa |
0.1 | 2.62±0.12 Ab | 0.48±0.04 Bbc | 2.15±0.08 Aab | 0.783±0.005 Aa |
0.2 | 2.67±0.13 Ab | 0.46±0.03 Bbc | 2.21±0.10 Aab | 0.736±0.033 AaB |
0.3 | 2.46±0.09 Ab | 0.42±0.02 Bc | 2.04±0.07 Ab | 0.708±0.004 AaB |
0.4 | 2.59±0.05 Ab | 0.45±0.01 Bbc | 2.14±0.04 Aab | 0.718±0.017 AaB |
0.5 | 2.71±0.19 Aab | 0.52±0.07 Bbc | 2.19±0.13 Aab | 0.718±0.032 AaB |
0.6 | 2.95±0.28 Aab | 0.65±0.15 AaBb | 2.30±0.12 Aab | 0.681±0.057 AaB |
0.7 | 3.24±0.17 Aa | 0.82±0.01 Aa | 2.43±0.16 Aa | 0.496±0.133 Bb |
表3 盐胁迫下夏蜡梅PSⅡ反应中心活性的影响
Table 3 Effect of alkaline salt stress on PSⅡreaction center activity of Sinocalycanthus chinensis
处理 Treatment/% | 单位反应中心吸收的 光能ABS/RC | 单位反应中心热耗散的 能量DIo/RC | 单位反应中心还原QA的 能量TRo/RC | 单位反应中心电子传递的 能量ETo/RC |
---|---|---|---|---|
CK | 2.81±0.22 Aab | 0.52±0.06 Bbc | 2.29±0.16 Aab | 0.807±0.033 Aa |
0.1 | 2.62±0.12 Ab | 0.48±0.04 Bbc | 2.15±0.08 Aab | 0.783±0.005 Aa |
0.2 | 2.67±0.13 Ab | 0.46±0.03 Bbc | 2.21±0.10 Aab | 0.736±0.033 AaB |
0.3 | 2.46±0.09 Ab | 0.42±0.02 Bc | 2.04±0.07 Ab | 0.708±0.004 AaB |
0.4 | 2.59±0.05 Ab | 0.45±0.01 Bbc | 2.14±0.04 Aab | 0.718±0.017 AaB |
0.5 | 2.71±0.19 Aab | 0.52±0.07 Bbc | 2.19±0.13 Aab | 0.718±0.032 AaB |
0.6 | 2.95±0.28 Aab | 0.65±0.15 AaBb | 2.30±0.12 Aab | 0.681±0.057 AaB |
0.7 | 3.24±0.17 Aa | 0.82±0.01 Aa | 2.43±0.16 Aa | 0.496±0.133 Bb |
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