Effect of Microwave and UV-C Radiation on Some Germination Parameters of Barley Seed Using Mathematical Models of Gompertz and Logistic

Abstract

Two separated sets of laboratory experiments were studied for barley seeds treating using a microwave and ultraviolet irradiation. In the microwave set, seeds have been exposed to the microwave radiations (2450 MHz) for 0 sec (control, MW0), 5 sec (MW1), 10 sec (MW2), and 20 sec (MW3), while in the ultraviolet set, seeds have exposed to UV-C radiation (254 nm) for 0 min (control, UV0), 30 min (UV1), 60 min (UV2), and 120 min (UV3). The aim is to study the influences of different exposure time from MW and UV-C radiation on some barley seed germination parameters and to choose the fitting model Logistic (Log) or Gompertz (Gom) suited to cumulative germination curves under the influence of these factors. The results of this study showed higher seed germination percentage (93.33%) at the exposure time MW2 and UV3 (88.33%), whereas the lowest value (66.67%) recorded in MW3 treatment. The results also appeared the best values at MW2 in SG, 6.24 seed day-1; in GRI, 31.19% day-1, and in GI, 87.67, as well as at UV2 in MGT, 3.32 day. The higher value of asymptotic germination barley seeds was found with Gom function (97.24%, and 88.71%) at MW2 and UV3, respectively. Besides, Gom functions at MW1 and UV2 give the highest maximum germination rates at 2,08 and 2.51% h-1, respectively. The results of the Log equation illustrated the highest value of germination percentage of the inflection point has recorded in 43.85 and 47.37 % on UV3 and MW2 treatments, respectively. For the fitting growth curve, the results have proven that the Gom function was shown the lowest values in MSE in all MW and UV exposure times, as compared with the Log function. So, the results of the Gom function were more fit for the growth curve for MW and UV treatments, as compared with the Log function.

Enhancing Germination and Seedling Growth in Salt Stressed Maize Lines through Chemical Priming

“…Different seed priming methods have been used over the years; by soaking seeds in distilled water (hydro-priming), soaking in solutions such as PEG, potassium salts (Osmopriming), soaking in salt solutions (halopriming) and soaking in plant growth hormones such as salicylic acid, indole acetic acid and thiamine (Khan et al, 2016;Shehu et al, 2019). There have been various reported evidences on the use of seed priming methods to improve seedling germination and early seedling growth under stress conditions (Lazim & Ramadhan, 2020;Olayinka et al, 2022). This study intends to explore the tolerance level of three newly released maize cultivars and evaluate the effectiveness of primers, including H2O, KNO3, ascorbic acid, and salicylic acid, in mitigating stress in maize.…”

UV-B and UV-C radiation on the germination of soybean seeds

“…It is known that seeds respond to UV radiation at wavelengths found in sunshine (UV-A and UV-B) and below 280 nm (UV-C). Several studies have been conducted that indicate either favorable or negative impact of UV-B and UV-C light on seed germination and seedling growth in a wide range of crops, such as wheat (Rupiasih & Vidyasagar, 2016;Semenov et al, 2020), soybean, wheat, pine and sunflower (Pournavab et al, 2019), maize and sugar beet (Sadeghianfar et al, 2019), barley (Lazim & Ramadhan, 2020), bean (Hernandez-Aguilar et al, 2021), Arabidopsis thaliana (Zhang et al, 2020), Pinus nigra (Ozel et al, 2021), Vicia vilosa (Semenov et al, 2021), and Allium cepa (Çavuşoğlu et al, 2022).…”

Wheat seed deterioration stimulated by plant extracts

“…Priming the seeds of three types of bread wheat (Abu Ghraib 3, IPA 99 and Al-Fath) by soaking them with concentrations of growth regulators and plant extracts, including licorice root extract, which improved the vitality and activity of seedlings of wheat cultivars compared to the control treatment. Seaweed extracts have many benefits for plant growth in general and enhance growth characteristics, as they improve the seed germination process and emergence in the early stages of growth 6 . Most extracts of medicinal plants, including marine plants, include chemicals that can activate the proteinase enzyme, which works to break down proteins during the onset of germination 7 .…”