https://www.ahs.ac.cn/images/0513-353X/images/top-banner1.jpg|#|苹果
https://www.ahs.ac.cn/images/0513-353X/images/top-banner2.jpg|#|甘蓝
https://www.ahs.ac.cn/images/0513-353X/images/top-banner3.jpg|#|菊花
https://www.ahs.ac.cn/images/0513-353X/images/top-banner4.jpg|#|灵芝
https://www.ahs.ac.cn/images/0513-353X/images/top-banner5.jpg|#|桃
https://www.ahs.ac.cn/images/0513-353X/images/top-banner6.jpg|#|黄瓜
https://www.ahs.ac.cn/images/0513-353X/images/top-banner7.jpg|#|蝴蝶兰
https://www.ahs.ac.cn/images/0513-353X/images/top-banner8.jpg|#|樱桃
https://www.ahs.ac.cn/images/0513-353X/images/top-banner9.jpg|#|观赏荷花
https://www.ahs.ac.cn/images/0513-353X/images/top-banner10.jpg|#|菊花
https://www.ahs.ac.cn/images/0513-353X/images/top-banner11.jpg|#|月季
https://www.ahs.ac.cn/images/0513-353X/images/top-banner12.jpg|#|菊花

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. 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:

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 NHX1SOS1SlMYB15HY5SlCBF1SlCBF3SlAREB1 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