Seed enhancement methods to increasing seed vigor of six species of two genus of Ziziphora and Thymus genera.

Document Type : Original Article

Authors

1 Associated professor, Gene Bank Group, Research Institute of Forests and Rangeland, Agricultural Research, Education and Extension Organization (AREEO).

2 Professor, Rangelands Research Division, Research Institute of Forests and Rangelands, Agricultural Research Education and extension Organization (AREEO), Tehran, Iran

Abstract

Cultivation and domestication of medicinal plants is a predominant priority for their essential oil production and growing in wide range of climatic conditions in steppic and semi steppic regions of Iran. The seeds of wild plants species have high viability, but they have no uniform emergence in the field. The seeds enhancement process through seeds priming, leads to elevated germination percentage and seed vigor, therefore, rendering the prime seeds suitable for the cultivation. In this research, the seed emergence characteristics of three species of Ziziphora genus (Ziziphra clinopodioides, Ziziphora tenuior and Ziziphora capitata) and three species of Thymus genus (Thymus lancifolius, Thymus kotschyanus and Thymus daenensis)  were examined by using osmopriming (polyethylene glycol), hormonal priming (gibberellic acid), matrix priming (vermiculite, perlite, zeolite,), hydropriming (distill water), and control (without priming) in seed technology laboratory  of natural resource gene bank in Research Institute of Forest and rangeland, Tehran, Iran in 2015. The maximum seedling length and seedling weight were observed in T. lancifolius via matrix priming.  The T. kotschyanus application of Gibberellic acid and hydro-priming, led to increasing seedling length and seedling weight, respectively. For the species of Z. clinopodioides, the seed priming using vermiculite, led to the increase of seedling length and weight of up to 34% and 17%, respectively. The seed treatment with perlite caused higher seedling weight (13%) of Z. capitata to that of control. The result showed that priming with solid material (matrix priming) had more effect on the seed enhancement.

Keywords

References

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Technology of Medicinal and Aromatic Plants of Iran
Volume 1, Issue 1 - Serial Number 1
September 2018
Pages 50-56

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