草业学报 ›› 2026, Vol. 35 ›› Issue (9): 100-112.DOI: 10.11686/cyxb2025397
• 研究论文 • 上一篇
赵颖(
), 张聪聪, 宋雨婷, 张翀敏, 安悦, 杨宾宾, 马永, 王宝强(
)
收稿日期:2025-09-29
修回日期:2025-11-10
出版日期:2026-09-20
发布日期:2026-07-27
通讯作者:
王宝强
作者简介:Corresponding author. E-mail: wangbq@gsau.edu.cn基金资助:
Ying ZHAO(
), Cong-cong ZHANG, Yu-ting SONG, Chong-min ZHANG, Yue AN, Bin-bin YANG, Yong MA, Bao-qiang WANG(
)
Received:2025-09-29
Revised:2025-11-10
Online:2026-09-20
Published:2026-07-27
Contact:
Bao-qiang WANG
摘要:
为探究外源2,4-表油菜素内酯(EBR)调控藜麦幼苗耐盐碱胁迫的机理,以‘陇藜1号’为试验材料,研究盐、碱和混合盐碱胁迫下外源EBR对藜麦幼苗生长、叶绿素、渗透调节、抗氧化酶、油菜素内酯(BR)合成及信号转导基因的影响。结果表明,盐碱处理下藜麦幼苗叶片萎蔫发黄,株高、鲜重、叶绿素(Chl)含量显著降低,丙二醛(MDA)含量、相对电导率(RC)、脯氨酸(Pro)含量、可溶性糖(SS)含量显著上升(P<0.05)。胁迫下喷施EBR后,叶片萎蔫卷缩有所缓解,株高和鲜重分别平均增加了13.37%和71.36%,对混合盐碱胁迫的缓解效果最好。藜麦叶片Chl、Pro、SS含量分别平均增加了12.74%、7.68%和38.67%;超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性分别平均提升了121.90%、6.43%、27.56%, MDA含量及RC分别降低了22.30%和18.62%。BR信号转导基因CqBAK1及BR合成基因CYP90B1表达量增加。综上,EBR可通过盐碱胁迫下藜麦幼苗渗透调节、抗氧化系统及BR信号转导之间的协调作用,提高藜麦的耐盐碱性。本研究为利用EBR提高藜麦幼苗耐盐碱性提供了理论依据与技术支撑。
赵颖, 张聪聪, 宋雨婷, 张翀敏, 安悦, 杨宾宾, 马永, 王宝强. 2,4-表油菜素内酯对盐碱胁迫下藜麦幼苗生长的促进效应[J]. 草业学报, 2026, 35(9): 100-112.
Ying ZHAO, Cong-cong ZHANG, Yu-ting SONG, Chong-min ZHANG, Yue AN, Bin-bin YANG, Yong MA, Bao-qiang WANG. Promoting effect of 2,4-epibrassinolide on the growth of quinoa seedlings under saline-alkali stress[J]. Acta Prataculturae Sinica, 2026, 35(9): 100-112.
| 基因Gene | 正向引物Forward primer (5′-3′) | 反向引物Reverse primer (3′-5′) |
|---|---|---|
| CqBAK1-1 | ATGGATCTCTCGCGCCAAAA | TCTTCACTGCCACGAAACGA |
| CqBAK1-6 | ACTGCAACTGACCAACACCA | ACCGTGTGGCTGAAATCCAT |
| CqBAK1-14 | CACAATGCTACGGGGACCTT | ACAGCTGTATCAGTTGGCCC |
| CqBAK1-35 | CCCGACTAGCGGAAACACTT | CCTTTGGGGAACTCGACGAA |
| CqBAK1-46 | GGGTACCCACAGTCAATGCT | AGTGGGGCTGACCAAAGAAA |
| CqBAK1-66 | GGGTGTACCCCGTTGTTGAT | TGCTAATCCCAACTCAGGCG |
| CYP90B1 | GGGTGTACCCCGTTGTTGAT | CCCCAACTCAGGCGGTATTT |
| CYP85A | GGCAGAGCTTTGACCATCCT | GAGGTTTCCGTCAGGCATCA |
| TUB-9 | ATCGGCAGTTGCATCCTGGTATTG | GAGATGTTCCGTCGTGTGAGTGAG |
表1 qRT-PCR引物
Table 1 qRT-PCR primers
| 基因Gene | 正向引物Forward primer (5′-3′) | 反向引物Reverse primer (3′-5′) |
|---|---|---|
| CqBAK1-1 | ATGGATCTCTCGCGCCAAAA | TCTTCACTGCCACGAAACGA |
| CqBAK1-6 | ACTGCAACTGACCAACACCA | ACCGTGTGGCTGAAATCCAT |
| CqBAK1-14 | CACAATGCTACGGGGACCTT | ACAGCTGTATCAGTTGGCCC |
| CqBAK1-35 | CCCGACTAGCGGAAACACTT | CCTTTGGGGAACTCGACGAA |
| CqBAK1-46 | GGGTACCCACAGTCAATGCT | AGTGGGGCTGACCAAAGAAA |
| CqBAK1-66 | GGGTGTACCCCGTTGTTGAT | TGCTAATCCCAACTCAGGCG |
| CYP90B1 | GGGTGTACCCCGTTGTTGAT | CCCCAACTCAGGCGGTATTT |
| CYP85A | GGCAGAGCTTTGACCATCCT | GAGGTTTCCGTCAGGCATCA |
| TUB-9 | ATCGGCAGTTGCATCCTGGTATTG | GAGATGTTCCGTCGTGTGAGTGAG |
图1 EBR对盐碱胁迫下藜麦幼苗表型的影响CK: 蒸馏水Distillated water; S: NaCl∶Na2SO4=1∶1; A: NaHCO3∶Na2CO3=1∶1; SA: NaCl∶Na2SO4∶NaHCO3∶Na2CO3=1∶1∶1∶1. 下同The same below.
Fig.1 Effects of EBR on the phenotype of quinoa seedling under saline-alkali stress
生长指标 Growth index | EBR浓度 EBR concentration (mg·L-1) | 处理Treatment | |||
|---|---|---|---|---|---|
| CK | S | A | SA | ||
| 株高Plant height (cm) | 0 | 27.000±1.155ab | 26.500±1.732b | 25.750±2.500b | 19.250±2.630c |
| 0.8 | 30.000±1.414a | 27.500±0.577ab | 27.750±2.062ab | 24.750±2.630b | |
| 单株地上鲜重Single-plant aboveground fresh weight (g) | 0 | 3.752±0.380bcd | 3.257±0.204d | 2.223±0.282e | 1.794±0.439e |
| 0.8 | 5.074±0.170a | 3.995±0.383bc | 4.380±0.262b | 3.409±0.572cd | |
| 单株地下鲜重Single-plant underground fresh weight (g) | 0 | 0.261±0.017cd | 0.172±0.001e | 0.184±0.013e | 0.176±0.058e |
| 0.8 | 0.522±0.080a | 0.396±0.027b | 0.223±0.044de | 0.294±0.010c | |
| 单株地上干重Single-plant aboveground dry weight (g) | 0 | 0.413±0.057bc | 0.313±0.075c | 0.508±0.021b | 0.484±0.052b |
| 0.8 | 0.670±0.143a | 0.490±0.019b | 0.517±0.020b | 0.426±0.049bc | |
| 单株地下干重Single-plant underground dry weight (g) | 0 | 0.046±0.001c | 0.035±0.007c | 0.046±0.001c | 0.046±0.012c |
| 0.8 | 0.093±0.010a | 0.083±0.017b | 0.052±0.009c | 0.072±0.015b | |
| 根冠比Root-shoot ratio | 0 | 0.113±0.020c | 0.117±0.044bc | 0.091±0.004c | 0.096±0.031c |
| 0.8 | 0.141±0.024abc | 0.170±0.040a | 0.100±0.011c | 0.168±0.028ab | |
| 地上组织含水量Water content of aboveground tissues | 0 | 0.889±0.027a | 0.904±0.073a | 0.769±0.034b | 0.721±0.062b |
| 0.8 | 0.868±0.025a | 0.877±0.026a | 0.882±0.007a | 0.873±0.016a | |
表2 EBR对盐碱胁迫下藜麦的株高、鲜重、干重、根冠比与组织含水量的影响
Table 2 Effects of EBR on plant height, fresh weight, dry weight, root-shoot ratio, and water content of quinoa under saline-alkali stress
生长指标 Growth index | EBR浓度 EBR concentration (mg·L-1) | 处理Treatment | |||
|---|---|---|---|---|---|
| CK | S | A | SA | ||
| 株高Plant height (cm) | 0 | 27.000±1.155ab | 26.500±1.732b | 25.750±2.500b | 19.250±2.630c |
| 0.8 | 30.000±1.414a | 27.500±0.577ab | 27.750±2.062ab | 24.750±2.630b | |
| 单株地上鲜重Single-plant aboveground fresh weight (g) | 0 | 3.752±0.380bcd | 3.257±0.204d | 2.223±0.282e | 1.794±0.439e |
| 0.8 | 5.074±0.170a | 3.995±0.383bc | 4.380±0.262b | 3.409±0.572cd | |
| 单株地下鲜重Single-plant underground fresh weight (g) | 0 | 0.261±0.017cd | 0.172±0.001e | 0.184±0.013e | 0.176±0.058e |
| 0.8 | 0.522±0.080a | 0.396±0.027b | 0.223±0.044de | 0.294±0.010c | |
| 单株地上干重Single-plant aboveground dry weight (g) | 0 | 0.413±0.057bc | 0.313±0.075c | 0.508±0.021b | 0.484±0.052b |
| 0.8 | 0.670±0.143a | 0.490±0.019b | 0.517±0.020b | 0.426±0.049bc | |
| 单株地下干重Single-plant underground dry weight (g) | 0 | 0.046±0.001c | 0.035±0.007c | 0.046±0.001c | 0.046±0.012c |
| 0.8 | 0.093±0.010a | 0.083±0.017b | 0.052±0.009c | 0.072±0.015b | |
| 根冠比Root-shoot ratio | 0 | 0.113±0.020c | 0.117±0.044bc | 0.091±0.004c | 0.096±0.031c |
| 0.8 | 0.141±0.024abc | 0.170±0.040a | 0.100±0.011c | 0.168±0.028ab | |
| 地上组织含水量Water content of aboveground tissues | 0 | 0.889±0.027a | 0.904±0.073a | 0.769±0.034b | 0.721±0.062b |
| 0.8 | 0.868±0.025a | 0.877±0.026a | 0.882±0.007a | 0.873±0.016a | |
图2 EBR对盐碱胁迫下藜麦叶片光合色素含量的影响不同小写字母表示差异显著(P<0.05),下同。The different small letters mean the significant differences at P<0.05, the same below.
Fig.2 Effects of EBR on photosynthetic pigment content in quinoa leaves under saline-alkali stress
图3 EBR对盐碱胁迫下藜麦叶片丙二醛(MDA)含量和相对电导率的影响
Fig.3 Effects of EBR on the malondialdehyde (MDA) content and relative conductivity of quinoa leaves under saline-alkali stress
图5 EBR对盐碱胁迫下藜麦叶片超氧化物歧化酶、过氧化物酶和过氧化氢酶活性的影响
Fig.5 Effects of EBR on the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) in quinoa leaves under saline-alkali stress
图6 EBR对盐碱胁迫下藜麦叶片BR合成与信号转导相关基因表达的影响
Fig.6 Effects of EBR on the expression of BR-synthesis and signal transduction related genes in quinoa leaves under saline-alkali stress
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