Effect of drought stress and salinity on germination, soluble carbohydrates and proline of Atriplex halimus

Document Type : Research Paper

Authors

1 Faculty of Agricultural Sciences and Natural Resources, University of Gonbad

2 Plant Production Department, Faculty of Agricultural Sciences and Natural Resources, University of Gonbad-Kavoos

Abstract

Drought stress and salinity are one of the most important limiting factor in plant growth. Accordingly, in order to investigate the characteristics of germination, soluble carbohydrates and proline Atriplex halimus in the face of drought stress and salinity in germination and seedling stage, two separate experiments were carried out in a randomized complete block design with three replications. Drought stress and salinity tests were carried out at 5 levels including 0, 4, 8, 12 and 16 bar, which were subjected to two separate experiments using mannitol and sodium chloride, respectively. The results of this study showed that the effect of drought stress and salinity on germination percentage and germination rate, root and shoot length, seed vigor index, shoot and root dry weight, soluble carbohydrate and proline A. halimus Had a significant effect on the level of one percent. Comparison of mean showed that all germination traits decreased with increasing dryness and salinity. Maximum radicle length was observed in 4 times dry and salinity treatments. In all saline treatments, the plant was capable of germination. However, germination mannitol was observed at drought stress levels up to 12 bar. The content of proline and soluble carbohydrates also increased significantly with increasing salinity and drought stress. Generally, the germination and morphological indices of the studied species tolerated salinity conditions better than drought. Also, in the germination stage, it is sensitive to stress in the seedling and the occurrence of stress in these conditions can reduce the percentage and rate of germination.

Keywords

References

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Iranian Journal of Seed Sciences and Research
Volume 6, Issue 2
September 2019
Pages 245-255

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