外源水杨酸影响蚕豆幼苗耐盐性的生理机制
刘伟 , 龙子轩 , 张兴民 , 顾文媛 , 池小娜 , 王玉萍
甘肃农业大学学报 ›› 2024, Vol. 59 ›› Issue (02) : 36 -44.
外源水杨酸影响蚕豆幼苗耐盐性的生理机制
The physiological mechanism by which exogenous salicylic acid enhances salt tolerance in Vicia faba seedlings
目的 探索外源水杨酸(SA)对蚕豆盐胁迫的缓解作用。 方法 采用叶面喷施的方法,在150 mmol/L的NaCl胁迫下,研究了5种不同浓度SA处理(0 (T1)、0.5 (T2)、1.0 (T3)、1.5 (T4)和2.0 mmol/L(T5))对蚕豆幼苗生理特性的影响,并通过相关性和主成分分析,探讨SA增强其耐盐性的生理机制。 结果 盐胁迫下,0.5~1.5 mmol/L SA显著降低幼苗叶片丙二醛(MDA)含量,提高了超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性和根系活力(Ra),促进了脯氨酸(Pro)、可溶性糖(SS)、可溶性蛋白含量(SP)的积累,增加了叶绿素a(Chl a)、叶绿素b(Chl b)及总叶绿素含量,同时降低根和叶中Na+含量,增加K+、Ca2+和Mg2+离子的吸收(P<0.05);2.0 mmol/L SA对盐胁迫的缓解作用不明显。相关性分析表明,MDA与叶和根中Na+呈极显著正相关(P<0.01),与Ra、Chl a、Chl b、叶和根中的K+、Ca2+、Mg2+呈极显著负相关(P<0.01)。主成分分析提取到特征值>1 的 2 个主成分,方差贡献率分别为71.878%和25.628%,累积方差贡献率达到97.507%。根据主成分得分排名可知,SA对盐胁迫的缓解能力为:T3>T4>T2>T5>T1。 结论 SA通过增强蚕豆幼苗的渗透调节、根系活力和抗氧化能力,维持离子吸收平衡,提高叶绿素含量,缓解盐胁迫,以1.0 mmol/L的SA喷施处理效果最好。
Objective To investigate the mitigating effects of exogenous salicylic acid (SA) on the salt stress response of Vicia faba seedlings. Method The influence of varying SA concentrations (0 (T1),0.5 (T2),1.0 (T3),1.5 (T4),and 2.0 mmol/L (T5)) on the physiological and biochemical attributes of V.faba seedlings under 150 mmol/L NaCl stress was assessed via foliar application.The physiological mechanisms were elucidated through correlation and principal component analysis (PCA). Result Under salt stress,SA concentrations of 0.5 to 1.5 mmol/L significantly reduced malondialdehyde (MDA) levels and enhanced the activities of superoxide dismutase (SOD),peroxidase (POD),catalase (CAT),and root activity (Ra).SA also facilitated the accumulation of proline (Pro),soluble sugar (SS),and soluble protein (SP),increased the content of chlorophyll a (Chl a),chlorophyll b (Chl b),and total chlorophyll,and decreased the Na+ content in roots and leaves.Additionally,it enhanced the uptake of K+,Ca2+,and Mg2+ ions (P<0.05).The mitigating effect of 2.0 mmol/L SA on salt stress was less pronounced.Correlation analysis indicated that MDA was positively correlated with Na+ levels in leaves and roots (P<0.01) and negatively correlated with Ra,Chl a,Chl b,K+,Ca2+,and Mg2+ in both tissues (P<0.01).PCA identified two principal components with eigenvalues>1,accounting for 71.878% and 25.628% of the variance,respectively,with a cumulative variance contribution rate of 97.507%.Based on the principal component scores,the efficacy of SA in alleviating salt stress in V.faba seedlings was ranked as follows:T3>T4>T2>T5>T1. Conclusion SA can mitigate the effects of salt stress and improve the salt tolerance of V.faba seedlings by enhancing osmotic regulation and antioxidant capacity,improving root activity and chlorophyll content,maintaining ion absorption balance,and stabilizing the membrane.The optimal treatment concentration was determined to be 1.0 mmol/L.
蚕豆 / 水杨酸 / 渗透调节 / 离子含量 / NaCl胁迫
Vicia faba / salicylic acid / osmotic regulation / ion content / NaCl stress
| [1] |
张红岩,郭兴莲,杨涛, |
| [2] |
李萍,张雁霞,刘玉皎.PEG胁迫下西北不同蚕豆种子萌发期的抗寒性鉴定[J].四川农业大学学报,2015,33(3):251-257. |
| [3] |
赵娜,缪亚梅,陈满峰, |
| [4] |
|
| [5] |
樊有存,张红岩,杨旭升, |
| [6] |
曲悦,王姝瑶,郝鑫, |
| [7] |
齐琪,马书荣,徐维东.盐胁迫对植物生长的影响及耐盐生理机制研究进展[J].分子植物育种,2020,18(8):2741-2746. |
| [8] |
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
王玉萍,董雯,张鑫, |
| [13] |
|
| [14] |
王耘,金潇潇,赵辉, |
| [15] |
邹琦.植物生理生化实验指导[M].北京:中国农业出版社,2000. |
| [16] |
李合生.植物生理生化实验原理和技术[M].北京:高等教育出版社,2000. |
| [17] |
鲍士旦.土壤农化分析[M].北京:中国农业出版社,2000. |
| [18] |
|
| [19] |
黄志磊,汪军成,姚立蓉,稀盐盐生植物的耐盐机理研究进展[J].甘肃农业大学学报,2022,57(2):1-10. |
| [20] |
Faghih S,Ghobadi C,Zarei A.Response of strawberry plant cv.Camarosa to salicylic acid and methyl jasmonate application under salt stress condition[J].Journal of Plant Growth Regulation,2017:36:651-659. |
| [21] |
赵如皓,丁俊男,于少鹏,NaCl胁迫对野生大豆幼苗生理及叶绿素荧光特性的影响[J].中国农学通报,2022,38(14):23-29. |
| [22] |
黄书超,侯栋,颉建明,混合微生物菌剂对连作土壤中黄瓜幼苗生长的影响[J].甘肃农业大学学报,2021,56(2):83-89. |
| [23] |
韩丽霞,欧阳敦君,张鸽香.NaCl胁迫对流苏幼苗生长、钠钾离子分布及渗透调节物质的影响[J].西北植物学报,2020,40(3):502-509. |
| [24] |
周万海,师尚礼,寇江涛.外源水杨酸对苜蓿幼苗盐胁迫的缓解效应[J].草业学报,2012,21(3):171-176. |
| [25] |
胡爱双,张小栋,郭文静,盐胁迫下八棱海棠株系的离子吸收、运输与分配[J].植物生理学报,2021,57(9):1829-1838. |
| [26] |
吴运荣,林宏伟,莫肖蓉.植物抗盐分子机制及作物遗传改良耐盐性的研究进展[J].植物生理学报,2014,50(11):621-1629 |
国家自然科学基金项目(31760351)
甘肃省农业发展项目(GNKJ-2020-1)
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