Effects of Halophilic PGPR on Salt Stress and Growth Parameters in Tomato Plants
8th International Eurasian Conference on Biological and Chemical Sciences (EurasianBioChem 2025), Ankara, Türkiye, 17 - 19 Aralık 2025, ss.1-2, (Özet Bildiri)
- Yayın Türü: Bildiri / Özet Bildiri
- Basıldığı Şehir: Ankara
- Basıldığı Ülke: Türkiye
- Sayfa Sayıları: ss.1-2
- Dokuz Eylül Üniversitesi Adresli: Evet
Özet
Increasing soil salinity as a result of global climate change is one of the major abiotic stress factors limitingagricultural productivity. High salinity leads to growth retardation, yield loss, physiological disturbances, andvarious morphological abnormalities in plants. To mitigate the adverse effects of salt stress, the use of plantgrowth-promoting rhizobacteria (PGPR) has emerged as an important biotechnological approach in recent years.Halophilic PGPR can enhance plant tolerance to salinity due to their ability to survive and function under high saltconcentrations. In this study, four different halophilic bacterial isolates with known plant growth-promoting (PGP)properties [Bacillus atrophaeus (EK3), Promicromonospora sp. (EM8), Zhihengliuella salsuginis (EM30), andThalassobacillus devorans (EM34)] were applied to Solanum lycopersicum L. cv. Batem Özçelik F1 grown underdifferent NaCI concentrations (0, 50, 100, 150 mM). Their effects on various growth parameters were evaluated.Plants were cultivated under controlled conditions for 45 days, and morphological characteristics such as leaf,root, and whole plant fresh weight (g), stem length (cm), root length (cm), leaf area (m²), number of leaves, stemdiameter (mm), and plant height (cm) were measured. The results showed that B. atrophaeus (EK3) significantlypromoted plant growth under non-saline conditions. Z. salsuginis (EM30) increased stem length under moderatesalinity, while Promicromonospora sp. (EM8) enhanced leaf number under 100 mM NaCl. In contrast, T. devorans(EM34) restricted plant growth under high salt conditions. Overall, these findings highlight the promisingbiotechnological potential of halophilic PGPR in improving salt stress tolerance in tomato plants, although theextent of this effect is contingent upon both the specific bacterial species and salt concentration. These insightsprovide a foundation for future research and practical applications in sustainable agriculture