Leyla Cheheltanan; Ali Tehranifar; Mahmoud Shoor; Seyyed Hossein Neamati; Saeed Khosravi
Abstract
Self-pollination induces a phenomenon known as inbreeding depression in heterozygous plants, which in turn leads to a reduction in seed germination and seedling growth. On the other hand, seed priming with plant hormones such as gibberellic acid is a technical approach that potentially results in the ...
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Self-pollination induces a phenomenon known as inbreeding depression in heterozygous plants, which in turn leads to a reduction in seed germination and seedling growth. On the other hand, seed priming with plant hormones such as gibberellic acid is a technical approach that potentially results in the improves of rapid and continuous seed germination and subsequent plant growth. Therefore, this research aimed to investigate the effect of different concentrations of gibberellic acid on the improvement of seed germination resulting from self-pollination in various varieties of Petunia hybrida in a factorial experiment with three replications as a completely randomized design. The treatments consisted of four levels of gibberellic acid (0, 50, 100, and 150 mg/L) and seeds obtained from self-pollination of Iranian Petunia, Tango Blue, Tritunia Pink Morn, and Tritunia White. The results indicated that seed priming with gibberellic acid, especially at a concentration of 100 mg/L, led to a significant increase in the activity of α-amylase and β-amylase by 6.56% and 1.57%, respectively. This increase resulted in 8.54% rise in soluble sugars content, providing energy that significantly enhanced germination percentage, germination speed, average time required for germination, seed vigor index, germination energy, and the fresh and dry weight of plumule and radicle. Moreover, among different varieties, seeds obtained from self-pollination of Iranian petunia demonstrated a higher germination percentage and germination speed compared to seeds from other varieties, indicating a superior capability in maintaining vigor potential, germination percentage, and germination speed.
Sahar Rahmani; R. Tavakkol Afshari; Soroor Khorramdel; Seyyed Hossein Neamati
Abstract
Camelina (Camelina sativa) is an important oilseed crop from the Brassicaceae family. This plant is important due to its industrial, health and food applications, and the cultivated area of this product is increasing, and important features of this plant. It can be attributed to the low need of this ...
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Camelina (Camelina sativa) is an important oilseed crop from the Brassicaceae family. This plant is important due to its industrial, health and food applications, and the cultivated area of this product is increasing, and important features of this plant. It can be attributed to the low need of this plant for inputs and high resistance to biotic and abiotic stresses. A factorial experiment in the form of a complete block design using SAS statistical software of the seeds of two varieties of Camelina (Sohail and Line 69) in terms of the effect of foliar spraying of micronutrients iron, zinc, manganese and the combined treatment and the control treatment immediately after closing After the formation of 50% of the seeds, foliar spraying was done and it was investigated during 3 repetition. The images prepared from Camelina plant embryos were evaluated and checked and the results of image analysis were compared with the results of the germination . The results of this experiment showed that the seed of line 69, which had the minimum cotyledon length, the minimum embryonic axis length, the minimum seed length and the maximum seed width in the combined foliar spraying treatment, had the minimum ratio of the embryonic axis length to the seed length, the minimum cotyledon length ratio It is related to the seed length and the minimum seed length to width ratio that the smaller size of the seed in line 69 has led to a decrease in the percentage and speed of germination .
