EVALUATION OF THE EFFECTS OF SALINITY STRESS ON GERMINATION AND GROWTH AT THE SEEDLING STAGE OF RED RICE ACCESSION COLLECTED IN THE COASTAL AREA OF THUA THIEN HUE

Lê Thị Tuyết Châm; Vũ Thị Thúy Hằng

doi:10.34238/tnu-jst.9551

EVALUATION OF THE EFFECTS OF SALINITY STRESS ON GERMINATION AND GROWTH AT THE SEEDLING STAGE OF RED RICE ACCESSION COLLECTED IN THE COASTAL AREA OF THUA THIEN HUE

About this article

Received: 05/01/24 Revised: 25/03/24 Published: 03/04/24

Authors

1. Le Thi Tuyet Cham, Vietnam National University of Agriculture
2. Vu Thi Thuy Hang , Vietnam National University of Agriculture

Abstract

This study aimed to assess effect of salinity stress on collected red rice (DP) and BC15 accessions at the germination stage and seedlings. The experiment was conducted with 3 NaCl concentrations (50, 100 & 150 mM NaCl) at germination stage and 2 NaCl concentrations (100 & 150 mM) at seedling stage in the Spring 2022 crop. The results showed that the germination rate, plumule length and number of roots of the rice accessions all decreased compared to control when increasing the salt concentration in the hydroponic solution. However, the decline in the local rice accession is lower than that of the BC15 variety. A decrease in plant height, number of panicles, number of roots and and ability to withstand increased salinity concentration after 24 days of treatment. However, both varieties showed signs of recovery after 15 days of stopping salt treatment. Research has determined that the DP red rice line has average salt tolerance (level 5), higher than the BC15 variety. From this result, it is shown that the planting area of this rice variety can be expanded to coastal saline areas or use as variety improvement material to contribute to the conservation of its local rice variety.

Keywords

BC15; Salinity tolerance; Red rice; Germination stage; Seedling stage

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DOI: https://doi.org/10.34238/tnu-jst.9551

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