Mohsen Malek; Farshid Hassani; Enayat Rezvani; Vahidreza Mahmoodi; Masoud Khosravi
Abstract
Ferula assa-foetida is one of the important medicinal plants of Apiaceae that has been exposed to extinction with repeated withdrawals from its natural habitat. Study of seed germination behavior of this species can lead to the development of cultivation and protection of its natural habitat. In order ...
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Ferula assa-foetida is one of the important medicinal plants of Apiaceae that has been exposed to extinction with repeated withdrawals from its natural habitat. Study of seed germination behavior of this species can lead to the development of cultivation and protection of its natural habitat. In order to optimal conditions determine for the standard germination test of Ferula assa-foetida seeds (which belongs to the heights of Yasuj city located in Kohgiluyeh and boyer-ahmad provinces), this experiment was designed as factorial in a completely randomized design in six treatments with different levels, with control treatment and in three replications. The experiment was carried out in 2021-2022 in the seed quality analysis laboratory of the Seed and Plant Registration and Certification Research Institute of Karaj, this factorial experiment was conducted based on a completely randomized design. For this purpose, Ferula assa-foetida seeds were evaluated under different temperature regimes (including 10, 15, and 20 °C) and different germination substrates (top of the paper (TP), between paper (BP), and sand (S)). Various pretreatments in the standard germination test process include stratification (for 14 and 35 days at 7 °C) and treatment with different substances (including gibberellic acid, kinetin, and potassium nitrate) as well as the seeds leaching for 24 hours. According to the results, kinetin pre-treatment (250 ppm) and TP seed germination substrate at 10 °C; optimal germination conditions of Ferula assa-foetida seeds were proposed for evaluation of different seed samples.
Khadijeh Sayahi; Amir Hossein Sari; A. Hamidi; Bahareh Nowruzi; Farshid Hassani
Abstract
In order to investigate the effect of cold plasma on seed germination characteristics and seedling growth of soybean commercial cultivars, an experiment in the form of a nest-factorial design with four replications was performed at the Plasma Physics Research Center of Islamic Azad University, Tehran ...
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In order to investigate the effect of cold plasma on seed germination characteristics and seedling growth of soybean commercial cultivars, an experiment in the form of a nest-factorial design with four replications was performed at the Plasma Physics Research Center of Islamic Azad University, Tehran Research Sciences Branch and Seed and Plant Certification and Registration Institute (SPCRI) in 2021. Seeds were exposed to cold plasma for 30, 60, 180, 300 and 420 seconds. In general, germination percentage from 0 to 66.97%, germination rate from 0 to 32.17%, germination index from 3.61 to 60.09%, mean germination time from 4.62 to 66.66%, root length 2.87 to 56.13%, seedling length 2.70 to 78.13%, normal seedling number 0 to 30.26% and seedling dry weight 1.36 to 36.63% increased compared to control treatment. The results of our study showed that 60 seconds treatment had the most positive effect on seed germination characteristics and seedling growth of soybean.
K. Moslemkhani; Farshid Hasani; Esmail nasrollahi; Samad Mobasser; Mohammadreza Jazayeri
Abstract
Fast and precise detection of infected potato plants is an essential practice in the seed potato certification system. Spectral fingerprinting as non-destructive and rapid method is going to be developed for discriminating plants with different stress such as disease. In this research virus infections ...
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Fast and precise detection of infected potato plants is an essential practice in the seed potato certification system. Spectral fingerprinting as non-destructive and rapid method is going to be developed for discriminating plants with different stress such as disease. In this research virus infections of experimental plants (that infected with both PVY and PLRV viruses) were analyzed by spectral data without any destruction. Spectral data were collected from 32 plants (16 infected plants and 16 healthy plants) that were found to be infected or healthy using the ELISA and RT-PCR test. Some pretreatment methods of spectral data such as multiplicative scatter correction were used to remove noise. Soft independent modeling of class analogy (SIMCA) based on PCA analysis predicted the disease with high detection accuracy. The results showed, none of the samples belonged to the wrong group or to two groups simultaneously. The wavelengths in three ranges of 910-863 nm (near-infrared ), 725-704 nm (red edge) and 580-530 nm (green), had the greatest contribution to the complete differentiation of infected and healthy plants and development of models respectively.
hossein rafiei; abbas dehshiri; Reza Tavakkol afshari; F. Hasani
Abstract
AbstractObjective of this research was identification and determination of the most suitable treatments to improve seed germination characteristics of Thyme medicinal plant. In order to evaluate different priming treatments on seed germination characteristics of Thyme, an experiment was conducted in ...
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AbstractObjective of this research was identification and determination of the most suitable treatments to improve seed germination characteristics of Thyme medicinal plant. In order to evaluate different priming treatments on seed germination characteristics of Thyme, an experiment was conducted in a completely randomized design with four replications which treatments were: without priming (control), Gibberellic acid (100, 200 and 300 ppm), Cytokinin (200 and 400 ppm), thiourea (1000, 2000 and 3000 ppm), potassium nitrate (10, 20, 100, 200, 300 and 400 ppm), phosphorus (10, 20, 30 ppm), manganese sulfate (2, 4 and 6 ppm). Germination characteristics such as shoot and radicle length, germination percentage, seed vigor, mean germination time and germination rate were evaluated. The results showed significant effects of seed priming treatments on shoot and radicle length, germination percentage, seed vigor and mean germination time at 1% probability level and germination rate at 5% probability level. Among the treatments, gibberellic acid treatments (100 ppm) and potassium nitrate (200 ppm), thiourea (2000 ppm) and manganese sulfate (4 ppm) presented high positive impacts on germination. Cytokinin treatments also significantly decreased many germination characteristics. It seems that potassium nitrate and gibberellic acid treatments compared with other treatments are more effective to improve all thyme germination characteristics. Keywords: Germination, Growth Stimulator, Seed Priming, Thymus.
