DOI: 10.11648/j.ajaf.20261405.13 ISSN: 2330-8591

Study on the Differences in Salt Tolerance of Platanus Occidentalis Seeds Between Saline and Non-Saline Habitats

Lin Qi, Yong Zhao, Jing Zhang, Yalin Yang, Ziliang Zhang, Haiyan Liu, Lisheng Huang, Lixia Yao
Show PDF Cite
In this paper, we investigated the differences in salt tolerance physiological characteristics of Platanus occidentalis seeds from Tai'an (non-saline habitat) and Dongying (saline habitat), Shandong Province, China. Ten 18-year-old mother trees from each location were selected as sample sources. Mature fruits were collected for morphological analysis, including measurements of fruit diameter, seed length, thousand-seed weight, and water absorption swelling rate. The tested seeds were evenly placed in Petri dishes and treated with 0 (CK), 0.1%, 0.3%, and 0.5% concentration gradients of sodium chloride (NaCl) and sodium bicarbonate (NaHCO 3 ) solutions, respectively, followed by germination experiments under a light incubator. The results showed that seed length, thousand-seed weight, and fruit diameter of seeds from Tai'an were greater than those from Dongying. Seeds from Tai'an exhibited higher germination rate, germination potential, germination index, vigor index, and lower mean germination time, along with higher seedling fresh weight than those from Dongying under the influence of NaCl and NaHCO 3 solutions. The germination rate, germination potential, germination index, and vigor index significantly decreased, except for mean germination time, showing no significant difference; seeding fresh weight and root length also declined significantly with increasing concentrations of NaCl or NaHCO 3 solutions. However, NaHCO 3 additionally significantly inhibited root average diameter and root tip number compared with NaCl. Overall, the salt tolerance of Platanus occidentalis seeds from Tai'an (non-saline habitat) was significantly higher than that from Dongying (saline habitat), and the inhibitory effect of NaHCO 3 was stronger than that of NaCl.

More from our Archive