中国水稻科学 ›› 2021, Vol. 35 ›› Issue (5): 487-494.DOI: 10.16819/j.1001-7216.2021.200808
收稿日期:
2020-08-11
修回日期:
2021-01-01
出版日期:
2021-09-10
发布日期:
2021-09-10
通讯作者:
王国栋
基金资助:
Yuxiang LI1, Hairong LIN1, Qian LIANG1, Guodong WANG2,*()
Received:
2020-08-11
Revised:
2021-01-01
Online:
2021-09-10
Published:
2021-09-10
Contact:
Guodong WANG
摘要:
【目的】探讨多巴胺(Dopamine,DA)引发对盐胁迫下水稻种子萌发及幼苗生长的影响。【方法】 以新疆自育水稻品种新稻17号为研究对象,分别用0(纯水)、0.1、0.5、1、1.5 mg/L的DA溶液(分别用S0、S0.1、S0.5、S1、S1.5表示)引发种子,采用浓度为100 mmol/L的NaCl溶液模拟盐胁迫,以未引发无盐胁迫处理作为对照1(CK),未引发有盐胁迫处理作为对照2(S-CK),研究多巴胺引发对盐胁迫下水稻种子萌发、幼苗生长及生理特性的影响。【结果】与CK相比,盐胁迫下(S-CK)水稻种子的萌发受到明显抑制且萌发速率降低,幼苗长势弱。引发处理不同程度缓解了盐胁迫对种子萌发的抑制,提高发芽率(13.3%~25.8%)和发芽速率,促进幼苗生长;可溶性糖和脯氨酸含量增加(16.4%~51.8%和6.5%~31.2%),超氧化物歧化酶 (28.9%~72.7%)、过氧化物酶 (15.0%~60.1%)和过氧化氢酶 (35.1%~133.0%)活性显著提高,丙二醛 (7.1%~26.8%)含量明显降低。表明对种子进行引发处理,通过增强盐胁迫下水稻种子活力,提高幼苗渗透调节物质含量和抗氧化酶活性,降低丙二醛含量,增强了水稻种子及幼苗的耐盐性,其中1.0 mg/L的多巴胺溶液(S1)引发效果优于水引发(S0)。【结论】对于新疆自育水稻品种新稻17而言,1.0 mg/L多巴胺溶液引发能够有效提高其对盐胁迫的抵抗能力,促进种子萌发和幼苗生长。
李玉祥, 林海荣, 梁倩, 王国栋. 多巴胺引发对盐胁迫下水稻种子萌发及幼苗生长的影响[J]. 中国水稻科学, 2021, 35(5): 487-494.
Yuxiang LI, Hairong LIN, Qian LIANG, Guodong WANG. Effects of Dopamine Priming on Seed Germination and Seedling Growth of Rice Under Salt Stress[J]. Chinese Journal OF Rice Science, 2021, 35(5): 487-494.
处理 Treatment | 发芽势 Germination potential/% | 发芽率 Germination rate/% | 发芽指数 Germination index | 活力指数 Activity index |
---|---|---|---|---|
CK | 53.3±1.1 a | 96.7±2.3 a | 30.9±0.3 a | 11.5±0.1 a |
S-CK | 16.7±0.5 d | 75.0±3.3 d | 18.1±0.3 d | 5.7±0.1 c |
S0 | 23.3±0.4 c | 86.7±2.2 c | 21.8±0.7 cd | 7.5±0.1 b |
S0.1 | 23.3±0.3 c | 90.0±1.2 b | 22.2±0.7 bc | 7.1±0.5 bc |
S0.5 | 30.0±0.5 b | 93.3±2.8 ab | 24.6±0.3 bc | 9.4±0.6 ab |
S1 | 33.3±0.3 b | 94.3±5.5 ab | 26.6±0.4 ab | 10.0±0.6 a |
S1.5 | 26.7±0.2 bc | 85.0±4.3 c | 22.8±0.6 bc | 7.7±0.4 b |
表1 多巴胺引发对NaCl胁迫下稻种萌发的影响
Table 1 Effect of dopamine priming on rice seeds germination under NaCl stress.
处理 Treatment | 发芽势 Germination potential/% | 发芽率 Germination rate/% | 发芽指数 Germination index | 活力指数 Activity index |
---|---|---|---|---|
CK | 53.3±1.1 a | 96.7±2.3 a | 30.9±0.3 a | 11.5±0.1 a |
S-CK | 16.7±0.5 d | 75.0±3.3 d | 18.1±0.3 d | 5.7±0.1 c |
S0 | 23.3±0.4 c | 86.7±2.2 c | 21.8±0.7 cd | 7.5±0.1 b |
S0.1 | 23.3±0.3 c | 90.0±1.2 b | 22.2±0.7 bc | 7.1±0.5 bc |
S0.5 | 30.0±0.5 b | 93.3±2.8 ab | 24.6±0.3 bc | 9.4±0.6 ab |
S1 | 33.3±0.3 b | 94.3±5.5 ab | 26.6±0.4 ab | 10.0±0.6 a |
S1.5 | 26.7±0.2 bc | 85.0±4.3 c | 22.8±0.6 bc | 7.7±0.4 b |
图2 多巴胺引发对NaCl胁迫下水稻幼苗生长的影响柱上相同小写字母表示在5%水平上差异不显著(n=3,最小显著差数法)。下同。
Fig. 2. Effect of dopamine priming on growth of rice seedlings under NaCl stress.Common lowercase letters above the bars mean no significant difference at P<0.05 (n =3, LSD). The same as below.
处理 Treatment | 根数 Root number | 根投影面积 Root projected area/cm2 | 根表面积 Root surface area/cm2 | 根系直径 Roots diameter/mm | 根系体积 Roots volume/cm3 |
---|---|---|---|---|---|
CK | 4.83±0.33 a | 8.98±1.03 a | 28.20±3.22 a | 0.25±0.02 b | 0.18±0.02 a |
S-CK | 4.39±0.10 ab | 6.91±0.61 bc | 21.70±1.93 abc | 0.27±0.02 ab | 0.15±0.01 ab |
S0 | 4.44±0.11 ab | 6.39±0.52 bc | 20.09±1.62 abc | 0.26±0.01 ab | 0.13±0.01 ab |
S0.1 | 4.12±0.25 b | 6.12±0.53 bc | 19.23±1.66 abc | 0.26±0.01 ab | 0.14±0.02 ab |
S0.5 | 4.56±0.13 ab | 7.60±0.65 ab | 23.87±2.05 ab | 0.28±0.02 a | 0.16±0.01 ab |
S1 | 4.67±0.44 a | 6.58±0.78 bc | 20.67±2.45 bc | 0.25±0.01 b | 0.13±0.03 ab |
S1.5 | 4.56±0.15 ab | 6.27±0.85 c | 19.71±2.66 c | 0.25±0.03 b | 0.11±0.02 b |
表2 多巴胺引发对NaCl胁迫下水稻根系形态特征的影响
Table 2 .Effects of dopamine priming on rice root morphological characters under NaCl stress.
处理 Treatment | 根数 Root number | 根投影面积 Root projected area/cm2 | 根表面积 Root surface area/cm2 | 根系直径 Roots diameter/mm | 根系体积 Roots volume/cm3 |
---|---|---|---|---|---|
CK | 4.83±0.33 a | 8.98±1.03 a | 28.20±3.22 a | 0.25±0.02 b | 0.18±0.02 a |
S-CK | 4.39±0.10 ab | 6.91±0.61 bc | 21.70±1.93 abc | 0.27±0.02 ab | 0.15±0.01 ab |
S0 | 4.44±0.11 ab | 6.39±0.52 bc | 20.09±1.62 abc | 0.26±0.01 ab | 0.13±0.01 ab |
S0.1 | 4.12±0.25 b | 6.12±0.53 bc | 19.23±1.66 abc | 0.26±0.01 ab | 0.14±0.02 ab |
S0.5 | 4.56±0.13 ab | 7.60±0.65 ab | 23.87±2.05 ab | 0.28±0.02 a | 0.16±0.01 ab |
S1 | 4.67±0.44 a | 6.58±0.78 bc | 20.67±2.45 bc | 0.25±0.01 b | 0.13±0.03 ab |
S1.5 | 4.56±0.15 ab | 6.27±0.85 c | 19.71±2.66 c | 0.25±0.03 b | 0.11±0.02 b |
图4 多巴胺引发对NaCl胁迫下水稻叶片MDA含量及抗氧化酶活性的影响
Fig. 4. Effect of DA priming on MDA content and antioxidant enzyme activities of rice seedling leaves under NaCl stress.
参数 Parameter | 可溶性糖含量 SS content | 脯氨酸含量 Proline content | MDA含量 MDA content | SOD活性 SOD activity | POD活性 POD activity | CAT活性 CAT activity |
---|---|---|---|---|---|---|
叶龄Leaf age | 0.189 | 0.046 | -0.967** | 0.951** | 0.897** | 0.822** |
单株叶面积 Leaf area per plant | -0.060 | -0.177 | -0.967** | 0.954** | 0.853* | 0.711 |
地上部鲜质量 Shoot fresh weight | -0.011 | 0.036 | -0.833* | 0.880** | 0.978** | 0.889** |
根系鲜质量 Root fresh weight | -0.015 | -0.081 | -0.818* | 0.863* | 0.888** | 0.791* |
苗高 Shoot length | 0.009 | -0.188 | -0.934** | 0.872* | 0.795* | 0.645 |
根长 Root length | -0.329 | -0.267 | -0.552 | 0.654 | 0.666 | 0.547 |
根数Root number | -0.070 | -0.329 | 0.765* | 0.705 | 0.599 | 0.436 |
根投影面积Root projected area | -0.469 | -0.548 | -0.604 | 0.649 | 0.559 | 0.359 |
根表面积Root surface area | -0.469 | -0.548 | -0.604 | 0.650 | 0.559 | 0.359 |
根直径Root diameter | 0.217 | 0.282 | 0.413 | -0.318 | -0.302 | -0.126 |
根体积Root volume | -0.625 | -0.575 | -0.349 | 0.418 | 0.412 | 0.213 |
表3 水稻幼苗长势与生理指标的相关性分析
Table 3 Correlation between growing state and physiological indexes of rice seedlings.
参数 Parameter | 可溶性糖含量 SS content | 脯氨酸含量 Proline content | MDA含量 MDA content | SOD活性 SOD activity | POD活性 POD activity | CAT活性 CAT activity |
---|---|---|---|---|---|---|
叶龄Leaf age | 0.189 | 0.046 | -0.967** | 0.951** | 0.897** | 0.822** |
单株叶面积 Leaf area per plant | -0.060 | -0.177 | -0.967** | 0.954** | 0.853* | 0.711 |
地上部鲜质量 Shoot fresh weight | -0.011 | 0.036 | -0.833* | 0.880** | 0.978** | 0.889** |
根系鲜质量 Root fresh weight | -0.015 | -0.081 | -0.818* | 0.863* | 0.888** | 0.791* |
苗高 Shoot length | 0.009 | -0.188 | -0.934** | 0.872* | 0.795* | 0.645 |
根长 Root length | -0.329 | -0.267 | -0.552 | 0.654 | 0.666 | 0.547 |
根数Root number | -0.070 | -0.329 | 0.765* | 0.705 | 0.599 | 0.436 |
根投影面积Root projected area | -0.469 | -0.548 | -0.604 | 0.649 | 0.559 | 0.359 |
根表面积Root surface area | -0.469 | -0.548 | -0.604 | 0.650 | 0.559 | 0.359 |
根直径Root diameter | 0.217 | 0.282 | 0.413 | -0.318 | -0.302 | -0.126 |
根体积Root volume | -0.625 | -0.575 | -0.349 | 0.418 | 0.412 | 0.213 |
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