外源水杨酸对盐胁迫下莴笋幼苗生长及生理特性的影响
李凤 , 张婧 , 颉建明 , 张俊峰 , 周睿 , 胡世莲
甘肃农业大学学报 ›› 2024, Vol. 59 ›› Issue (06) : 160 -168.
外源水杨酸对盐胁迫下莴笋幼苗生长及生理特性的影响
Effects of exogenous salicylic acid on growth and physiological characteristics of lettuce seedlings under salt stress
目的 研究水杨酸(SA)对盐胁迫下莴笋的缓解效应,为盐碱地莴笋种植提供理论技术依据。 方法 以无NaCl胁迫且不喷施SA为对照1(CK1),以200 mmol/L NaCl胁迫不喷施SA为对照2(CK2);设置叶面喷施0.1、0.3、0.6、1.2、2.4 mmol/L 5个SA处理,动态测定莴笋的生长生理相关指标。 结果 与CK1处理相比,CK2处理抑制莴笋幼苗生长,降低生物量积累,增加可溶性蛋白,可溶性糖和脯氨酸含量。与CK2处理相比,叶面喷施适宜浓度水杨酸(0.6 mmol/L)可以缓解盐胁迫对莴笋生物量积累的抑制,促进莴笋叶片的可溶性蛋白、可溶性糖和脯氨酸含量的积累,增强光合作用;在胁迫第6天时,可溶性糖、可溶性蛋白、净光合速率Pn、气孔导度Gs和蒸腾速率Tr分别提高37.5%、57.1%、74.4%、88.9%和52.3%,dV/dto(QA还原速率)降低了22.5%。 结论 叶面喷施SA可缓解盐胁迫对莴笋幼苗生长的抑制作用,提高盐胁迫下莴笋叶片可溶性蛋白、可溶性糖和脯氨酸的含量,降低MDA和相对电导率,增强光合能力。
Objective To study the alleviate effect of salicylic acid(SA) on lettuce under saline stress and to provide a theoretical and technical basis for improving saline lettuce cultivation. Method No restriction of NaCl and no spraying of NaCl as control 1 (CK1) and 200 mmol/L NaCl as control 2 (CK2).Five SA treatments of foliar spray 0.1,0.3,0.6,1.2,2.4 mmol/L were set up to dynamically measure the growth and physiological related indexes of lettuce. Result Compared with the CK1 treatment,the CK2 treatment inhibited the growth of lettuce seedlings,reduced the accumulation of biomass and increased the content of soluble protein,soluble sugar and proline.Compared with CK2 treatment,foliar application of salicylic acid (0.6 mmol/L) at appropriate concentrations could reduce the inhibition of lettuce biomass accumulation in lettuce,promote the accumulation of soluble protein,soluble sugar and proline,and improve photosynthesis.Soluble sugar,soluble protein,net photosynthetic rate Pn,stomatic conductance Gs and transpiration rate Tr were increased by 37.5%,57.1%,74.4%,88.9% and 52.3%,respectively,while dV/dto (QA reduction ratio) was decreased by 22.5%. Conclusion Foliar application of SA alleviates growth inhibition of lettuce plants under saline stress,increases soluble protein,soluble sugar and proline,reduces MDA and relative conductivity,and increases photosynthetic capacity of lettuce leaves under saline pressure.
salicylic acid / saline stress / lettuce / osmoregulation / photosynthesis
| [1] |
冯君,马秀兰,王宇, |
| [2] |
翟亚明,魏丽萍,杨倩.不同调控方式对设施盐渍化土壤特性和番茄产量及品质的影响[J].江苏农业学报,2015,31(4):871-876. |
| [3] |
蔡琪琪,王堽,董寅壮, |
| [4] |
孟祥浩,刘义国,张玉梅, |
| [5] |
史俊,杨鹤同,徐超, |
| [6] |
刘江波,潘镭文,杜锦, |
| [7] |
王晓宁,魏永义,周伟, |
| [8] |
|
| [9] |
|
| [10] |
张婷,彭琳娜.盐分胁迫对油麦菜生理生长的影响[J].安徽农业科学,2014,42(17):5365-5366. |
| [11] |
刘娅.LED补光与根际温度调控对越夏水培生菜再生生长的影响[D].海口:海南大学,2018. |
| [12] |
高俊凤.植物生理学实验指导[M].北京:高等教育出版社,2006. |
| [13] |
李宏博,吕德国,梁姗, |
| [14] |
赵玮,马海霞,张艳萍.胡麻萌发期和苗期对盐胁迫的阈值分析[J].新疆农业科学,2022,59(1):145-154. |
| [15] |
马广民,赵孟如,怀婷婷, |
| [16] |
|
| [17] |
张凤银,陈禅友,胡志辉, |
| [18] |
赵海波,卢艳如,龚宜龙, |
| [19] |
韩海霞,姚岭柏,唐亚楠.外源水杨酸对盐胁迫黄瓜生长及过氧化物酶活性的影响[J].贵州农业科学,2015,43(12):69-71. |
| [20] |
张玲,王华,周静, |
| [21] |
朱伟,房卫平,谢德意, |
| [22] |
张冠初,张智猛,慈敦伟, |
| [23] |
陈贵华,石岭,霍秀文, |
| [24] |
|
| [25] |
王廷芹,甘秋霞,李倩茹.盐胁迫对苋菜种子的发芽及幼苗生长的影响[J].贵州大学学报(自然科学版),2021,38(1):10-15. |
| [26] |
黄程,文小梅,唐殷, |
| [27] |
朱世杨,刘庆,张小玲, |
| [28] |
贾璐绮,向春阳,陈佩静, |
| [29] |
|
| [30] |
刘建新,王金成,王瑞娟, |
| [31] |
刘萱,王芸.盐胁迫对两种甘草幼苗生物量及光合荧光特性的影响[J].中国土壤与肥料,2022(2):163-169. |
| [32] |
|
| [33] |
王立红,李星星,孙影影, |
| [34] |
任丽丽,任春明,张伟伟, |
| [35] |
|
| [36] |
张帅磊,罗石磊,张文渊, |
甘肃省科技技术创新引导计划项目(22CX8NA029)
国家重点研发计划(2016YFD0201005)
甘肃省瓜菜产业技术体系专项资金(GARS-GC-1)
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