Effect of exogenous spermidine on physiological characteristics of potato seedlings under NaCl stress

doi:10.6048/j.issn.1001-4330.2024.02.009

Xinjiang Agricultural Sciences ›› 2024, Vol. 61 ›› Issue (2): 336-344.DOI: 10.6048/j.issn.1001-4330.2024.02.009

• Crop Genetics and Breeding·Germplasm Resources·Molecular Genetics • Previous Articles Next Articles

Effect of exogenous spermidine on physiological characteristics of potato seedlings under NaCl stress

LIU Yi(), LI Jiangtao, JIANG Yinghong, YANG Ruwei(), SUN Hui, WU Yan

Comprehensive Test Site of Xinjiang Academy of Agricultural Sciences, Urumqi 830013, China

Received:2023-06-17 Online:2024-02-20 Published:2024-03-19
Correspondence author: YANG Ruwei (1984-), female, from Ningxia, senior agronomist, research direction in Plant Protection and High Yield Cultivation, (E-mail)617950493@qq.com.
Supported by:
Research and integrated application of green high-yield and high-efficiency cultivation technology of potato in Xinjiang(2022B02044-2);Natural Science Foundation of Xinjiang Uygur Autonomous Region-surface project"Effects of exogenous spermidine on osmoregulatory substance contents and proline metabolizing enzyme activities of potato seedlings under salt stress"(2020D01A68)

NaCl胁迫下外源亚精胺对马铃薯幼苗生理特征的影响

刘易(), 李江涛, 江应红, 杨茹薇(), 孙慧, 吴燕

新疆农业科学院综合试验场,乌鲁木齐 830013

通讯作者: 杨茹薇(1984-),女,宁夏人,正高级农艺师,研究方向为植物保护与高产栽培, (E-mail)617950493@qq.com
作者简介:刘易(1983-),男,河北人,副研究员,硕士,研究方向为马铃薯高产栽培及抗逆生理,(E-mail)liuyun_5511@163.com
基金资助:
新疆维吾尔自治区重点研发任务专项“新疆马铃薯绿色高产高效栽培技术研究与集成应用”(2022B02044-2);新疆维吾尔自治区自然科学基金-面上项目“外源亚精胺对盐胁迫下马铃薯幼苗渗透调节物质含量和脯氨酸代谢酶活性的影响”(2020D01A68)

Abstract

Abstract:

【Objective】 To explore the effect of exogenous spermidine on the physiological characteristics of potato seedlings under NaCl stress, so as to provide technical reference for potato planting in salinized areas of Xinjiang.【Methods】 The virus-free seedling of Jindu 16 potato was used as the experimental material, and the effects of exogenous Spd on plant growth, antioxidant enzyme activity and osmotic regulator content of potato leaves were studied by simulating salt stress treatment with different concentrations of NaCl.【Results】 Salt stress inhibited the growth of potato plants.The activities of antioxidant enzymes such as superoxide dismutase(SOD), peroxidase(POD), catalase(CAT)and ascorbate peroxidase(APX)were promoted by low salt stress and inhibited by high salt stress.The contents of non-enzymatic antioxidant enzymes such as ascorbic acid(ASA)and glutathione(DSH)were decreased.The contents of proline, soluble sugar and amino acid increased.Exogenous Spd maintained the normal physiological and metabolic function of plants by increasing the content of chlorophyll, root activity, regulating the content of osmotic regulatory substances, and enhancing the activity of antioxidant enzymes.【Conclusion】 Exogenous Spd can improve the salt tolerance of potato and alleviate the inhibitory effect of salt stress on potato plants, and 0.9 mmol/L Spd(S₃)concentration has the most obvious alleviating effect.

Key words: potato; NaCl stress; spermidine; seedling growth; physiological and biochemical characteristics

摘要：

【目的】研究NaCl胁迫下外源亚精胺(Spd)对马铃薯幼苗生理特征的影响,为新疆盐渍化区域马铃薯种植提供技术参考。【方法】以晋薯16号马铃薯幼苗为材料,采用不同浓度NaCl模拟盐胁迫处理,研究外源亚精胺Spd对马铃薯植株生长、叶片抗氧化酶活性、渗透调节物质含量的影响。【结果】盐胁迫抑制了马铃薯植株生长,使得超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)等酶促类抗氧化酶活性表现为低盐胁迫促进,高盐胁迫抑制;抗坏血酸(ASA)、谷胱甘肽(DSH)等非酶促类抗氧化酶含量均降低;脯氨酸、可溶性糖、氨基酸含量升高;外源亚精胺(Spd)通过提高叶绿素含量、根系活力,调节渗透调节物质含量,增强抗氧化酶活性等方式维持植物体的正常生理代谢功能。【结论】外源亚精胺(Spd)可提升马铃薯耐盐性,缓解盐胁迫对马铃薯植株的抑制作用,其中0.9 mmol/L Spd(S₃)浓度缓解效果最明显。

关键词: 马铃薯, NaCl胁迫, 亚精胺, 幼苗生长, 生理生化特征

CLC Number:

S532

LIU Yi, LI Jiangtao, JIANG Yinghong, YANG Ruwei, SUN Hui, WU Yan. Effect of exogenous spermidine on physiological characteristics of potato seedlings under NaCl stress[J]. Xinjiang Agricultural Sciences, 2024, 61(2): 336-344.

刘易, 李江涛, 江应红, 杨茹薇, 孙慧, 吴燕. NaCl胁迫下外源亚精胺对马铃薯幼苗生理特征的影响[J]. 新疆农业科学, 2024, 61(2): 336-344.

Figures/Tables 5

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盐处理 NaCl treatment (mmol/L)	Spd处理 Spd treatment (mmol/L)	株高 Plant height (cm)	茎粗 Stem diameter (mm)	鲜重(g/株) Fresh weight (g/plant)	干重(g/株) Dry weight (g/plant)
T₀	S₀	8.86±0.36^a	1.41±0.04^a	1.02±0.05^a	0.087±0.002^b
	S₁	8.55±0.39^a	1.41±0.02^a	1.00±0.03^a	0.09±0.002^ab
	S₂	9.09±0.42^a	1.35±0.07^a	1.02±0.03^a	0.088±0.002^b
	S₃	9.32±0.37^a	1.37±0.04^a	1.06±0.02^a	0.09±0.007^a
	S₄	8.59±0.39^a	1.39±0.02^a	1.02±0.03^a	0.088±0.006^ab
T₁	S₀	7.29±0.26^c	1.38±0.01^a	0.89±0.01^bc	0.075±0.005^ab
	S₁	7.15±0.10^c	1.35±0.03^ab	0.87±0.02^c	0.074±0.001^b
	S₂	8.31±0.24 ^b	1.30±0.05^b	0.89±0.03^bc	0.076±0.003^ab
	S₃	9.14±0.11^a	1.34±0.02^ab	0.96±0.03^a	0.086±0.002^a
	S₄	8.09±0.31^b	1.30±0.05^b	0.91±0.01^b	0.083±0.003^ab
T₂	S₀	6.86±0.32^b	1.29±0.01^b	0.84±0.03^b	0.065±0.002^b
	S₁	6.93±0.21^b	1.28±0.01^b	0.86±0.01^b	0.074±0.002^ab
	S₂	7.82±0.19^a	1.29±0.01^b	0.87±0.01^b	0.081±0.003^ab
	S₃	7.84±0.17^a	1.33±0.01^a	0.95±0.01^a	0.089±0.006^a
	S₄	7.46±0.35^a	1.26±0.03^b	0.93±0.01^a	0.085±0.001^ab
T₃	S₀	6.01±0.40^b	1.25±0.00^bc	0.6±0.01^b	0.059±0.005^b
	S₁	6.24±0.19^ab	1.24±0.03^bc	0.66±0.03^ab	0.077±0.002^a
	S₂	6.55±0.32^ab	1.21±0.02^c	0.69±0.03^a	0.076±0.001^ab
	S₃	6.79±0.26^a	1.31±0.04^a	0.69±0.04^a	0.079±0.003^a
	S₄	6.34±0.19^ab	1.28±0.01^ab	0.68±0.01^a	0.078±0.002^a

盐处理 NaCl treatment (mmol/L)	Spd处理 Spd treatment (mmol/L)	株高 Plant height (cm)	茎粗 Stem diameter (mm)	鲜重(g/株) Fresh weight (g/plant)	干重(g/株) Dry weight (g/plant)
T₀	S₀	8.86±0.36^a	1.41±0.04^a	1.02±0.05^a	0.087±0.002^b
	S₁	8.55±0.39^a	1.41±0.02^a	1.00±0.03^a	0.09±0.002^ab
	S₂	9.09±0.42^a	1.35±0.07^a	1.02±0.03^a	0.088±0.002^b
	S₃	9.32±0.37^a	1.37±0.04^a	1.06±0.02^a	0.09±0.007^a
	S₄	8.59±0.39^a	1.39±0.02^a	1.02±0.03^a	0.088±0.006^ab
T₁	S₀	7.29±0.26^c	1.38±0.01^a	0.89±0.01^bc	0.075±0.005^ab
	S₁	7.15±0.10^c	1.35±0.03^ab	0.87±0.02^c	0.074±0.001^b
	S₂	8.31±0.24 ^b	1.30±0.05^b	0.89±0.03^bc	0.076±0.003^ab
	S₃	9.14±0.11^a	1.34±0.02^ab	0.96±0.03^a	0.086±0.002^a
	S₄	8.09±0.31^b	1.30±0.05^b	0.91±0.01^b	0.083±0.003^ab
T₂	S₀	6.86±0.32^b	1.29±0.01^b	0.84±0.03^b	0.065±0.002^b
	S₁	6.93±0.21^b	1.28±0.01^b	0.86±0.01^b	0.074±0.002^ab
	S₂	7.82±0.19^a	1.29±0.01^b	0.87±0.01^b	0.081±0.003^ab
	S₃	7.84±0.17^a	1.33±0.01^a	0.95±0.01^a	0.089±0.006^a
	S₄	7.46±0.35^a	1.26±0.03^b	0.93±0.01^a	0.085±0.001^ab
T₃	S₀	6.01±0.40^b	1.25±0.00^bc	0.6±0.01^b	0.059±0.005^b
	S₁	6.24±0.19^ab	1.24±0.03^bc	0.66±0.03^ab	0.077±0.002^a
	S₂	6.55±0.32^ab	1.21±0.02^c	0.69±0.03^a	0.076±0.001^ab
	S₃	6.79±0.26^a	1.31±0.04^a	0.69±0.04^a	0.079±0.003^a
	S₄	6.34±0.19^ab	1.28±0.01^ab	0.68±0.01^a	0.078±0.002^a

Effect of exogenous spermidine on physiological characteristics of potato seedlings under NaCl stress

NaCl胁迫下外源亚精胺对马铃薯幼苗生理特征的影响

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