Effects of Temperature and Salinity on the Germination Characteristics of Sonneratia caseolaris
2024
Kwak, S.E. | Lee, B.R. | Park, E.H. | Van, S.T. | Yim, E.Y.
We evaluated the impact of temperature and salinity on the germination of true mangrove Sonneratia caseolaris (L.) Engl. seeds to determine the optimal conditions for their growth. Seeds were collected from Nam Dinh Province, Vietnam. The seeds underwent temperature treatments (19℃, 24℃, 30℃, and 38℃) and salinity treatments (0‰, 10‰, 20‰, 25‰, 30‰, 35‰, and 40‰). The analysis of germination characteristics and radicle growth indicated that, under the 30°C condition, the germination rate was 88%, and the radicle growth was 25.24 mm, showing significantly higher germination rates GR), mean germination time (MGT), and germination performance index (GPI) than under other temperature conditions (P<0.05). In the 10‰ salinity treatment group, both the germination rate (88%) and radicle growth (39 mm) were significantly higher (P<0.05). High temperatures and salinity were not suitable for seed germination, and they significantly affected seed germination and early growth.
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