Effects of Potassium on Growth and Development of Tomato Seedlings Under Abiotic Stress

doi:10.16420/j.issn.0513-353x.2024-0383

Acta Horticulturae Sinica ›› 2025, Vol. 52 ›› Issue (6): 1599-1618.doi: 10.16420/j.issn.0513-353x.2024-0383

• Cultivation?Physiology & Biochemistry • Previous Articles Next Articles

Effects of Potassium on Growth and Development of Tomato Seedlings Under Abiotic Stress

XIAO Zhihao¹, ZHENG Hankai¹, ZHANG Mannan¹, TANG Huaiqian¹, WANG Jiaying¹, ZHANG Yuyang¹^,², ZHANG Junhong¹^,², YE Zhibiao¹^,², and YE Jie¹^,²^,^*()

¹ National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops，College of Horticulture & Forestry Sciences，Huazhong Agricultural University，Wuhan 430070，China
² Hubei Hongshan Laboratory，Wuhan 430070，China

Received:2024-12-01 Revised:2025-03-19 Online:2025-06-20 Published:2025-06-20
Contact: and YE Jie

Abstract

Abstract:

Using‘Ailsa Craig’tomato as experimental material，the effects of nutrient solution containing potassium of different concentrations（1.5，6.0 and 9.0 mmol · L^-1）on the growth and development of tomato seedlings under different abiotic stress（low temperature，salt and drought）were studied. The results showed that abiotic stress treatment significantly increased the content of malondialdehyde（MDA），and significantly decreased plant height，fresh weight of aboveground，fresh weight of underground part，photosynthetic pigment content，root activity，superoxide dismutase（SOD）activity and soluble sugar content. Under abiotic stress treatment，plant height and fresh weight of different parts increased with the increase of exogenous potassium concentration，and the promotion of plant height was the most significant. The content of photosynthetic pigment in the control group was medium potassium > high potassium > low potassium. Under abiotic stress，the content of photosynthetic pigment，soluble sugar and SOD activity increased significantly with the increase of exogenous potassium concentration，the root activity increased，and the MDA content decreased. According to the comprehensive evaluation of principal component analysis and membership function analysis，the growth and development of each treatment under any stress were from strong to weak in the order of control medium potassium > control high potassium > control low potassium > stress high potassium > stress medium potassium > stress low potassium. The potassium content in different parts of all treatments increased significantly with the increase of exogenous potassium concentration. Under salt stress，the increase of exogenous potassium concentration can reduce the absorption of Na⁺ in different parts. Under abiotic stress treatment，the expressions of K⁺ absorption and transport related genes HAK5 and LKT1 and abiotic stress response related genes NHX1，SOS1，SlMYB15，HY5，SlCBF1，SlCBF3，SlAREB1 and SlNAC6 were significantly increased with the increase of exogenous potassium concentration. In conclusion，increasing exogenous potassium concentration can alleviate the damage of different abiotic stresses on tomato seedling stage，help enhance the adaptability to abiotic stresses，and promote growth and development.

Key words: tomato, potassium, low temperature stress, salt stress, drought stress, growth development

XIAO Zhihao, ZHENG Hankai, ZHANG Mannan, TANG Huaiqian, WANG Jiaying, ZHANG Yuyang, ZHANG Junhong, YE Zhibiao, and YE Jie. Effects of Potassium on Growth and Development of Tomato Seedlings Under Abiotic Stress[J]. Acta Horticulturae Sinica, 2025, 52(6): 1599-1618.

Figures/Tables 11

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K/mmol · L^-1	mg · L^-1
K/mmol · L^-1	KNO₃	NH₄NO₃	Ca(NO₃)₂·4H₂O	NH₄H₂PO₄	MgSO₄·7H₂O	CaCl₂
1.5	151.75	180.30	945.00	115.00	493.00	0
6.0	607.00	0	945.00	115.00	493.00	0
9.0	910.50	0	590.42	115.00	493.00	166.77

K/mmol · L^-1	mg · L^-1
K/mmol · L^-1	KNO₃	NH₄NO₃	Ca(NO₃)₂·4H₂O	NH₄H₂PO₄	MgSO₄·7H₂O	CaCl₂
1.5	151.75	180.30	945.00	115.00	493.00	0
6.0	607.00	0	945.00	115.00	493.00	0
9.0	910.50	0	590.42	115.00	493.00	166.77

基因名称Gene name	引物（5′-3′）Primer
Actin	F：ATGGCAGACGGAGAGGATATTCA	R：GCCTTTGCAATCCACATCTGCTG
LKT1	F：ACTTGCCTCTCACCCTTTG	R：CCACACAGTTCTCAATGCC
HAK5	F：CCGTGTTACGCGCCTTTAA	R：TCCTTTTTTACCGTTTCTTTTGAAG
HY5	F：GCAAGCGACGAGTTCTAT	R：ATCTCCGGCACTCTTCTG
SlMYB15	F：GCAGCAAGATTACCGGGAAG	R：TGGTGAGTTAGGAGCATGCA
SOS1	F：GTGCAGTACAGATGCTTTTACTTG	R：AGGGCCACAACAGCCACAG
NHX1	F：TGGCGAGATTGGGGGTGAGT	R：AACGACTCTCTTCAAGGAGATGACC
SlNAC6	F：GAGGTGTTTCATGTGGTTAGGTGGAT	R：CGGCTTGCTGAGAAGACTGTTGC
SlAREB1	F：TCCTTATGTGTTTAATGGTGGTTT	R：CATCGTTTTCTTCTTTTAGTTTCG
SlCBF1	F：GAGTCGGAAGAAGTTTCAGG	R：TGTAGGCATCAGTTTCCAC
SlCBF3	F：TGCCGGGTTTACTTACGAAT	R：TCAGCTTCCACATGATCTCC

基因名称Gene name	引物（5′-3′）Primer
Actin	F：ATGGCAGACGGAGAGGATATTCA	R：GCCTTTGCAATCCACATCTGCTG
LKT1	F：ACTTGCCTCTCACCCTTTG	R：CCACACAGTTCTCAATGCC
HAK5	F：CCGTGTTACGCGCCTTTAA	R：TCCTTTTTTACCGTTTCTTTTGAAG
HY5	F：GCAAGCGACGAGTTCTAT	R：ATCTCCGGCACTCTTCTG
SlMYB15	F：GCAGCAAGATTACCGGGAAG	R：TGGTGAGTTAGGAGCATGCA
SOS1	F：GTGCAGTACAGATGCTTTTACTTG	R：AGGGCCACAACAGCCACAG
NHX1	F：TGGCGAGATTGGGGGTGAGT	R：AACGACTCTCTTCAAGGAGATGACC
SlNAC6	F：GAGGTGTTTCATGTGGTTAGGTGGAT	R：CGGCTTGCTGAGAAGACTGTTGC
SlAREB1	F：TCCTTATGTGTTTAATGGTGGTTT	R：CATCGTTTTCTTCTTTTAGTTTCG
SlCBF1	F：GAGTCGGAAGAAGTTTCAGG	R：TGTAGGCATCAGTTTCCAC
SlCBF3	F：TGCCGGGTTTACTTACGAAT	R：TCAGCTTCCACATGATCTCC

处理Treatment	μ（X₁）	μ（X₂）	D值D-value	排名Rank
干旱胁迫对照 + 中钾Drought stress control + Medium potassium	1.000	0.412	0.930	1
干旱胁迫对照 + 高钾Drought stress control + High potassium	0.993	0.442	0.927	2
盐胁迫对照 + 中钾Salt stress control + Medium potassium	0.902	0.427	0.845	3
盐胁迫对照 + 高钾Salt stress control + High potassium	0.858	0.444	0.808	4
干旱胁迫对照 + 低钾Drought stress control + Low potassium	0.864	0.366	0.805	5
盐胁迫对照 + 低钾Salt stress control + Low potassium	0.825	0.300	0.763	6
低温胁迫对照 + 中钾Low temperature stress control + Medium potassium	0.531	0.357	0.510	7
低温胁迫对照 + 高钾Low temperature stress control + High potassium	0.516	0.353	0.497	8
盐胁迫处理 + 高钾Salt stress + High potassium	0.493	0.325	0.473	9
低温胁迫对照 + 低钾Low temperature stress control + Low potassium	0.446	0.328	0.432	10
干旱胁迫处理 + 高钾Drought stress + High potassium	0.328	0.838	0.389	11
盐胁迫处理 + 中钾Salt stress + Medium potassium	0.404	0.204	0.380	12
干旱胁迫处理 + 中钾Drought stress + Medium potassium	0.242	1.000	0.332	13
干旱胁迫处理 + 低钾Drought stress + Low potassium	0.155	0.973	0.252	14
盐胁迫处理 + 低钾Salt stress + Low potassium	0.271	0.078	0.248	15
低温胁迫处理 + 高钾Low temperature stress + High potassium	0.194	0.304	0.207	16
低温胁迫处理 + 中钾Low temperature stress + Medium potassium	0.120	0.149	0.123	17
低温胁迫处理 + 低钾Low temperature stress + Low potassium	0	0	0	18

Effects of Potassium on Growth and Development of Tomato Seedlings Under Abiotic Stress

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