M. Shafe; M.A. Behdani; M. Jami Al-Ahmadi
Abstract
Priming is one of the seed germination enhancement methods that mayresult in increasment and uniformity of germination and facilitates seedling establishment in field even in the stress conditions. In other to evaluate the osmopriming effects on improvement of henbane (Hyoscyamus niger L.) germination, ...
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Priming is one of the seed germination enhancement methods that mayresult in increasment and uniformity of germination and facilitates seedling establishment in field even in the stress conditions. In other to evaluate the osmopriming effects on improvement of henbane (Hyoscyamus niger L.) germination, and to determine the best treatment for rapid seedling establishment, a factorial experiment based on RCD with three replications was performed at Faculty of Agriculture, University of Birjand. Osmotic solutions were prepared by using KNO3, NaCl and KH2PO4 at three osmotic potentials (-0.5, -1 and -1.5 MPa) and were applied on seeds for three priming periods (24, 48 and 72 hours). Results showed that priming periods and osmotic potentials did not affect germination percentage significantly, but their effects on other traits were significant at 0.01 probability level. Interaction effect of incubation time and osmotic potential was significant only on average germination time and root length at 0.01 and 0.05 probability levels, respectively. In general, seeds priming for 72 hours with KNO3 and KH2PO4 at -1.5 MPa had the greatest effect on improvement of henbane germination parameters.
M. Makkizadeh Tafti; R. Farhoudi; M. Rastifar
Abstract
With regard to the importance of Melissa officinalis L. as a medicinal plant and abundance of saline soil and water in the country, the current research was conducted to study the effect of osmopriming on seed germination of Melissa officinalis under salinity stress in two separate experiments. The aim ...
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With regard to the importance of Melissa officinalis L. as a medicinal plant and abundance of saline soil and water in the country, the current research was conducted to study the effect of osmopriming on seed germination of Melissa officinalis under salinity stress in two separate experiments. The aim of the first experiment was to determine the best osmopriming conditions for seeds of Melissa officinalis carried out in a completely randomized design. The treatments were combination of osmotic potential of polyethylene glycol (PEG) with four levels (-4, -8, -12 and -16 bar), duration of priming with three levels (3, 5 and 7 day) and temperature of priming with two levels (25 and 30/20oC). The results showed significant differences among osmopriming treatments with regard to the germination percentage, germination velocity and radicle length. Mean comparisons showed that osmotic potential treatment of -16 bars in 5 days and 25oC significantly increased the germination percentage and germination velocity compared with other treatments. The aim of the second experiment was to study the effect of osmopriming on seed germination of Melissa officinalis under salinity stress based upon a factorial experiment in a completely randomized design with three replications. The treatments were water salinity (control, 4, 8 and 12 dS/m) and type of seeds (control and primed seeds). The results indicated that primed seeds in all salinity levels had higher germination percentage, germination velocity and radicle length compared to non-primed seeds. According to the results, the interaction effect of salinity and seed treatments was significant with regard to the germination percentage, germination velocity and radicle length.
M. Makkizadeh Tafti; R. Tavakol Afshari; N. Majnoon Hosseini; H.A. Naghdi Badi; A. Mehdizadeh
Volume 22, Issue 3 , November 2006, , Pages 216-222
Abstract
In this experiment, the effect of osmopriming on germination percentage and mean time for germination (MTG) of Borage (Borago officinalis L.) seeds was studied. This study had been conducted at Agronomy Department of Tehran University-Karaj during 2004 in four replications in factorial experiment on ...
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In this experiment, the effect of osmopriming on germination percentage and mean time for germination (MTG) of Borage (Borago officinalis L.) seeds was studied. This study had been conducted at Agronomy Department of Tehran University-Karaj during 2004 in four replications in factorial experiment on the base of randomized complete design. The treatments were osmotic potential of polyethylene glycol (PEG) with four levels (Control, -4, -8 and -12 bar) and priming duration with three levels (24, 48 and 72 h). The results indicated that osmotic potential of PEG had significant effect on germination percentage and mean time for germination. According to the results, the highest percentage was in -8 bar concentration. Also priming duration didn’t affect the percentage of germination and mean time for germination. The results indicated that the interaction of osmotic potential and duration was not significant.
