The Effect of Humic acid Pretreatment on Germination of purple cornflower (Echinacea purpurea) plant under Drought and Salinity Conditions

Document Type : Research Paper

Authors

1 MSc. Student, Department of Horticulture, Gorgan University of Agricultural Sciences and Natural Resources

2 Assistant Professor, Department of Horticulture, Gorgan University of Agricultural Sciences and Natural Resources

Abstract

In order to investigate effect of humic acid pre-treatment on germination of Purple coneflower (Echinacea  purpurea) plant under drought and salinity conditions, two experiments were  conducted in labratory of Horticultural sciences at Gorgan University of Agricultural Sciences and Natural Resources (GUASNR) in 2015, in completely randomized design with four levels of humic acid (0, 250, 500 and 1000 mg.l1-) and five levels (0, -1, -2, -3 and -5 bar) drought and salinity stress in three replications. NaCl and PEG were used for salinity and drought stresses, respectively. Results showed that germination and speed percentages, root and shoot length, root wet weight and seed vigor were, significantly decreased by increasing drought and salinity stresses and were zero in drought and salinity level of -4 bar. Impact of humic acid was significant on the mentioned traits until level -3 bar too. The effect of reciprocal humic acid and drought stress were significant in drought stress just in germination percentage and root wet weight, but in salinity stress were significant in total traits. It can be concluded that germination of purple cornflower seeds has more resistant in drought stress conditions than salinity stress conditions. Pretreatment seed of Purple coneflower with humic acid in saline and dry zones can increase germination resistance.

Keywords

References

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Journal of Arid Biome
Volume 6, Issue 2
December 2016
Pages 97-107

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