Effects of salinity on seedling gemination and growth of early seedlings of the \(\textit{Najas indica}\) (Willd.) Cham.

Authors

  • Dang Thi Le Xuan Department of Biology, Hue University of Education, Thua Thien Hue, Vietnam
  • Phan Thi Thuy Hang Faculty of Biology, University of Sciences, Hue University, Thua Thien Hue, Vietnam
  • Ton That Phap Faculty of Biology, University of Sciences, Hue University, Thua Thien Hue, Vietnam; Faculty of Environmental Science, University of Sciences, Hue University, Thua Thien Hue, Vietnam
  • Hoang Cong Tin Faculty of Environmental Science, University of Sciences, Hue University, Thua Thien Hue, Vietnam
  • Luong Quang Doc Faculty of Biology, University of Sciences, Hue University, Thua Thien Hue, Vietnam

DOI:

https://doi.org/10.15625/1859-3097/17075

Keywords:

Najas indica, cây con tái sinh từ hạt, độ mặn, đầm phá nước lợ, cỏ thủy sinh sống chìm.

Abstract

Najas indica (Willd.) Cham. is a freshwater submerged aquatic vegetation. N. indica is an annual plant. Therefore, seeds in the sediment as well as the survival and growth of seedlings play an important role in re-establishing new populations of the species. The purpose of this study was to determine the seed density in the sediment; to examine the effect of salinity on seedling germination from seeds; and to assess the effect of the salinity on growth of early seedlings of N. indica under the experimental condition. The seed density of N. indica was highest from September to November and the lowest in May to July 2018. Seedlings of the species were observed in the range of salinity from 0‰ to 15‰. No seedling was recorded at 20‰ salinity during the experimental period. The number of seedlings, growth rate, shoot length, and the number of internodes of seedling of N. indica, all had maximum values at a salinity of 5‰, while leaf length tended to decrease with increasing salinity. The study showed that the optimum salinity for seedling germination from seeds and growth of seedlings of N. indica species from Cau Hai lagoon was at 5‰ salinity. The study results contribute to supplying necessary information for the protection and development of meadows of the N. indica species in the lagoon environment of Vietnam.

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Published

2022-06-21

How to Cite

Dang, X. T. L., Phan Thi, T. H., Ton, T. P., Hoang, C. T., & Luong, Q. D. (2022). Effects of salinity on seedling gemination and growth of early seedlings of the \(\textit{Najas indica}\) (Willd.) Cham. Vietnam Journal of Marine Science and Technology, 22(2). https://doi.org/10.15625/1859-3097/17075

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