草业学报 ›› 2026, Vol. 35 ›› Issue (9): 34-46.DOI: 10.11686/cyxb2025383
胡国强1(
), 马霜2, 雍嘉仪1, 邓文辉1, 胡海英1(
)
收稿日期:2025-09-23
修回日期:2025-11-03
出版日期:2026-09-20
发布日期:2026-07-27
通讯作者:
胡海英
作者简介:Corresponding author. E-mail: haiying@nxu.edu.cn基金资助:
Guo-qiang HU1(
), Shuang MA2, Jia-yi YONG1, Wen-hui DENG1, Hai-ying HU1(
)
Received:2025-09-23
Revised:2025-11-03
Online:2026-09-20
Published:2026-07-27
Contact:
Hai-ying HU
摘要:
为了系统探究不同种源河北木蓝在干旱胁迫及复水后生理生化响应机制的差异,本研究以野生种和栽培种河北木蓝为材料,设置持续干旱处理3、6、10和13 d以及复水2、7 d,通过盆栽控水试验系统比较分析2种木蓝生物量积累、气孔结构变化、叶片相对含水量、细胞膜稳定性、抗氧化水平[过氧化氢酶(CAT)活性和过氧化氢(H2O2)含量]以及内源激素[生长素(IAA)、乙烯(ETH)和脱落酸(ABA)]含量等多个生理生化指标的动态变化。结果表明:1)在干旱处理下,2种木蓝的总生物量、气孔密度和孔径、叶片相对含水量及乙烯含量较CK均下降,而叶片相对电导率、CAT活性、生长素和脱落酸含量较CK均升高。在干旱下,野生种木蓝的叶绿素总含量和叶片H2O2含量降低,根部H2O2含量升高;而栽培种叶绿素总含量和H2O2含量均升高。2)复水处理后,各指标均逐渐恢复至对照水平,具有补偿生长能力。3)相关性分析表明,2种木蓝的气孔密度与叶片相对含水量、叶绿素与H2O2和激素含量、相对电导率与CAT活性、H2O2与激素含量均呈极显著正相关(P<0.01)关系。主成分分析显示,ABA、IAA、H?O?含量和气孔孔径等主要指标在第一主成分上对干旱胁迫响应的累积贡献率为57.6%,而叶片相对含水量和CAT活性等主要指标在第二主成分上累积贡献率为20.9%。由此可见,2种木蓝均能通过调节气孔结构以减缓水分流失,激活抗氧化防御系统和内源激素信号通路,维持膜稳定性,从而提高耐旱性。其中,栽培种在各指标响应上更为显著,表现出更强的干旱适应能力。
胡国强, 马霜, 雍嘉仪, 邓文辉, 胡海英. 干旱及复水对不同种源河北木蓝气孔结构与内源激素等生理特征的影响[J]. 草业学报, 2026, 35(9): 34-46.
Guo-qiang HU, Shuang MA, Jia-yi YONG, Wen-hui DENG, Hai-ying HU. Effects of drought stress and rehydration on physiological characteristics such as stomatal structure and endogenous hormones in wild and cultivated Indigofera bungeana lines[J]. Acta Prataculturae Sinica, 2026, 35(9): 34-46.
图1 干旱胁迫与复水对2种木蓝总生物量的影响ML: 野生种Wild species; MJ: 栽培种Cultivated species; CK: 对照Control; DR: 干旱胁迫和复水处理Drought stress and rehydration treatment. 不同小写字母表示同一种木蓝的不同处理(CK或DR)在不同干旱处理时间下差异显著(P<0.05);*和**表示同一干旱处理时间下同种木蓝干旱胁迫和复水处理(DR)与对照(CK)差异显著(*: P<0.05,**: P<0.01)。3、6、10、13 为干旱天数;R-2、R-7表示复水2、7 d。下同。Different lowercase letters indicate significant differences in different drought treatment times among different treatments (CK or DR) of the same I. bungeana species (P<0.05); *, ** denote significant difference between drought stress and rehydration treatment (DR) and control (CK) of the same species of I. bungeana under the same drought duration (*: P<0.05,**: P<0.01). 3, 6, 10, 13: Drought duration (days); R-2, R-7: 2,7 days after rehydration. The same below.
Fig.1 Effects of drought stress and rehydration on the total biomass of two species of I. bungeana
图4 干旱胁迫与复水对2种木蓝叶片相对电导率和相对含水量的影响
Fig.4 Effects of drought stress and rehydration on the leaf relative electrical conductivity and relative water content of two species of I. bungeana
图7 干旱胁迫与复水条件下2种木蓝各指标间的相关性和主成分分析A: 野生种Wild species; B: 栽培种Cultivated species; C: 主成分分析Principal component analysis. X1: 总生物量Total biomass; X2: 气孔密度Stomatal density; X3: 气孔孔径Stomatal aperture; X4: 叶绿素a Chlorophyll a; X5: 叶绿素b Chlorophyll b; X6: 叶绿素总量Total chlorophyll; X7: 相对电导率Relative electrical conductivity; X8: 相对含水量Relative water content; X9: 过氧化氢Hydrogen peroxide; X10: 过氧化氢酶Catalase; X11: 生长素Auxin; X12: 乙烯Ethylene; X13: 脱落酸Abscisic acid.
Fig.7 Correlation and principal component analysis of each index among two I. bungeana speciesunder drought stress and rehydration conditions
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