Bita Oskouei; Abbas Dehshiri; Hadis Afshar; Elahe Gheysari; Ali Shayanfar
Abstract
An experiment was implemented based on completely randomized design with four replications to determine standard Flixweed (Descurainia sophia) germination test condition. Flixweed seeds were placed in germinator for 14 days under 6 temperatures 10, 15, 20, 25, 20-30, 35ºC exposed to three treatments ...
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An experiment was implemented based on completely randomized design with four replications to determine standard Flixweed (Descurainia sophia) germination test condition. Flixweed seeds were placed in germinator for 14 days under 6 temperatures 10, 15, 20, 25, 20-30, 35ºC exposed to three treatments of potassium nitrate (2 grams per 1000 ml of distilled water), pre-chilling (7-10ºC for 7 days), pre-soaking (24h in distilled water), two cellulose substrates of top paper and between paper, and sands. Then, germination indexes were assessed. After comparison of three mentioned treatments (potassium nitrate, pre-chilling, and pre-soaking) with control it was demonstrated that the highest germination rate belonged to pre-chilling in 15ºC.The lowest amount of germination indices and the highest percentage of dead seeds were found in 25 and 35ºC. The best treatment to improve germination and seedling vigor was applying of potassium nitrate and optimal temperatures to reach maximum of germination was 10 and 15ºC. Higher germination was achieved when top and between paper substrate were used than sand. In total, it was suggested that it would be better for potassium nitrate to be under 10 and 15ºC when top and between paper and sand were applied, respectively to optimal condition for standard germination determination was achieved, because the highest percentage of final germination, normal seedlings, and seedling weight vigor, and also the lowest percentage of dead seeds were observed.
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.
