Effects of different concentrations of NaCl on the growth of cherry tomato seedlings

doi:10.16178/j.issn.0528-9017.20240608

Abstract

Abstract:

Soil salinization is one of the main reasons limiting the development of agriculture in China. Seedling quality affects later yield. In order to investigate the effects of salt stress on the growth of cherry tomato seedlings, Ouxiuhongying 1 was selected as the material and subjected to salt stress treatment using NaCl solutions with three concentrations (50, 100, 150 mmol·L^-1). The results showed that all NaCl treatments had significantly inhibitory effects on plant height, stem diameter, and biomass of cherry tomato. Among them, 150 mmol·L^-1 NaCl showed the most significant inhibition, reducing plant height, stem diameter, and above ground biomass by 35.94%, 12.80% and 21.99%, respecctively, compared with the control group. The SPAD values increased with the increasing of NaCl concentration. Meanwhile, compared with the control group, the content of MDA, and the activities of SOD and POD in the root tips of cherry tomato seedlings increased under 100 and 150 mmol·L^-1 NaCl. All of these indicate that NaCl treatments have significantly inhibitory effects on the growth and metabolism of cherry tomato seedlings.

Key words: cherry tomato, seedling, salt stress, antioxidant enzyme

CLC Number:

S641.2

GAO Xianyi, YUE Yani, XU Jingcheng, LIU Shudong, LIN Tingwei, QI Huijuan, WANG Ying, WANG Wei. Effects of different concentrations of NaCl on the growth of cherry tomato seedlings[J]. Journal of Zhejiang Agricultural Sciences, 2025, 66(2): 344-348.

Figures/Tables 7

Fig.1 Effect of different concentrations of NaCl on plant height of cherry tomato seedlings

Fig.2 Effect of different concentrations of NaCl on stem diameter of cherry tomato seedlings

Table 1 Effect of different concentrations of NaCl on fresh weight, biomass, and relative water content of above-ground cherry tomato seedlings

NaCl处理浓度/ (mmol·L^-1)	地上部鲜重/g	地上部生物量/g	相对含水量/%
0	14.14 a	1.41 a	90.03 a
50	14.34 a	1.43 a	90.03 a
100	11.48 b	1.25 b	89.11 a
150	9.06 c	1.10 c	87.86 a

Fig.3 Effect of different concentrations of NaCl on SPAD values of cherry tomato seedlings

Fig.4 MDA content in root tip of cherry tomato seedlings under different concentrations of NaCl

Fig.5 SOD activity in root tips of cherry tomato seedlings under different concentrations of NaCl

Fig.6 POD activity in root tips of cherry tomato seedlings under different concentrations of NaCl

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