Breaking the seed dormancy of Panicum antidotale and the effect of salinity stress on seed germination

Subject Areas :

معصومه صالحی ¹ , Sayyaed Afshin Mosavat ² , Ali Akbar Zaki Zadeh ³ , فرهاد دهقانی ⁴

1 - مرکز ملی تحقیقات شوری، سازمان تحقیقات آموزش و ترویج کشاورزی- یزد- ایران.
2 - Agronomy and Horticultural Crops Research Department, Golestan Agricultural and Natural Resources Research and Education Center, AREEO, Gorgan, Iran.
3 - National Salinity Research Center, Agricultural Research, Education and Extension Organization (AREEO), Yazd, Iran.
4 - مرکز ملی تحقیقات شوری

Received: 2024-03-05 Accepted : 2025-02-06 Published : 2024-02-29

Keywords: Grass, seed dormancy, sulfuric acid, pre-cold,

Abstract :

Antidote millet (Panicum antidotale) is a perennial tropical grass with rhizomes that tolerates salt stress. One of the problems of growing this plant in the saline lands is low seeds viability and lack of proper seedling establishment. For this reason, the seeds pre-treatments including: control, 28 days ago cold treatment with KNO3 and normal water, 14 days ago cold treatment with KNO3 and water, sulfuric acid pre-treatment and salinity levels including distilled water, 10, 20 and 30 dS/m was conducted in factorial basis based on a completely randomized design with three replications. In order to determine the germination percentage in the soil conditions, the best pretreatments were cultivated at salinity levels (6 and 12 dS/m). The results showed that the effect of salinity stress and seed pretreatment and the mutual effect of salinity stress and seed pretreatment on all germination traits were significant. The average comparison results showed that the best seed pretreatment was sulfuric acid in all salinity levels, but in non-saline conditions, there was no significant difference with the cold pretreatment with potassium nitrate. In the salinity treatment of 30 dS/m, the percentage of germination reached zero in all pretreatments except the pretreatment with sulfuric acid. Based on the results of the fitted linear equation, the changes of Panicum germination to salinity showed that the germination threshold in sulfuric acid treatment was 8.71 dS/m of saturated soil extract and the slope of the line was 2.6%. According to the results, panicum seed dormancy is physical type.

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