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Showing 3 results for Seedling Growth
Effect of priming on millet (Panicum miliaceum) seed germination under drought and salt condition
Hamdollah Eskandari, Ashraf Alizadeh-Amraie,
Volume 1, Issue 1 (5-2014)
Abstract
A laboratory experiment was conducted to evaluate the effect of seed priming under salt and drought conditions on seed germination and early seedling development of millet. A factorial experiment (3×2×5) based on completely randomized design with three replications was employed. The first factor was the effect of seed priming (control, hydro priming and KNO3), the second factor was the effect of salt and drought stresses including NaCl and PEG 6000 and the third factor was the effect of osmotic potential levels (-0.3, -0.6, -0.9 and -1.2 MPa). Results showed that germination performance was negatively affected by decreasing osmotic potential. There was a variable germination with different stress condition, in which seeds were able to germinate at all concentration of NaCl but no significant germination was occurred at -0.6 MPa of PEG for no primed and KNO3. However, both seed priming treatments (Hydropriming and KNO3), improved seed germination performance with the clear effectiveness of Hydropriming in improving germination properties under salt and drought conditions. It was concluded that germination inhibition resulted from osmotic effect rather than salt toxicity.

Effect of Hydropriming and Seed Size on Germination Characteristics and Seedling Growth of Vigna radiata Seeds under Salinity Stress
Ali Ghatei, Ghasem Parmoon, Zahra Amin Deldar, Hadi Ghamary,
Volume 2, Issue 2 (2-2016)
Abstract

In order to evaluate the effect of hydropriming on seed germination of Vigna radiata under salinity stress, an experiment was arranged in a factorial based on a completely randomized design with three replications in the laboratory of the Agricultural College of the University of Ramin Khuzestan. Treatments were salinity stress at 4 levels (0, 3, 6 and 9 Mmhos) and hydro priming at 3 levels (1, 1.5 and 3 h) and two sizes of seed (small and large seeds) that was carried out by NaCl. Results showed that all of the germination characteristics decreased with increased salinity, but this decrement for seeds that primed at a long time, was less. Also at all characteristics, small seeds, showed better reactions than large seeds. Generally, hydropriming was improved germination characteristics of Vigna radiata under saline conditions. According to this experiment, hydropriming improved germination and establishment.


Allelopathic Effect of Different Concentrations of Aqueous Extracts of Nine Weeds Species on Seed Germination and Seedling Characteristics of Anise (Pimpinella anisum)
Zahra Ajribzadeh, Hamidreza Balouchi, Alireza Yadavi, Amin Salehi,
Volume 4, Issue 1 (9-2017)
Abstract
In order to evaluate the allelopathic effect of aqueous extract of nine weeds species on Anise (Pimpinella anisum) seed germination and seedling growth characteristics, an experiment was conducted in the Laboratory of Yasouj University in 2014. This experiment was carried out as factorial with the aqueous extracts of nine weeds species, as the first factor, in different concentrations (10, 20, 30, 40 and 50 g.l-1), as the second factor, in a completely randomized design with four replications. The results showed that interactions between different weed aqueous extracts and concentrations had a significant impact on the germination percentage and rate, root and shoot length and weight, and vigor of anise seeds at 1% probability. The most allelopathic effects on germination percentage and rate were observed in 10 g/l of the aqueous extract of Cowherb and Corn Buttercup, in 20 to 30 g/l of Corn Buttercup and Whitetop, and in 40 to 50 g.l-1 of Corn Buttercup, Whitetop, Wild lettuce and Cowherb, which completely stopped seed germination in Anise.

Highlights:
  1.  Allelopathic effects of 9 common weedy types on germination of Anise Seed were studied in Kohgiluyeh and Boyerahmad.
  2. The effect of different concentrations of aqueous extracts of weeds on germination characteristics of anise was studied.

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