Ultraviolet Radiation Effect on Seed Germination and Seedling Growth of Common Species from Northeastern Mexico

Abstract

Light is the only key factor essential for plant growth, and ultraviolet (UV) rays, the harmful part of solar radiation, have the ability to decrease the metabolic rate in photosynthesis, causing deterioration in their growth. Accurate handling of the ultraviolet light that reaches the crops allows the improvement of different aspects of production, such as the shape and color of the plants, the precocity of the crops, and an improvement in the control of pests and diseases. The present study was carried out with the purpose of studying the responses in terms of germination and growth of four plant species—Glycine max, Triticum aestivum, Helianthus annuus, and Pinus maximartinezii—exposed to different doses of UV-C and UV-B radiation, for evaluation through the standard germination and accelerated aging tests, registering the germination rate (GR) and vigor (V), the number of normal seedlings (NS), and the average lengths of radicle (ALR) and plumule (ALP). Seeds treated with UV-C radiation showed a significant difference (p <0.05) between treatments (doses) and species, both in the standard germination and accelerated aging tests for the ALR and ALP variables. Seeds of G. max showed low sensitivity in both tests, with the dose 43.20 kJ/m2/day. The seeds of H. annuus and P. maximartinezii showed high sensitivity in both tests under UV-C radiation, with the doses 8.64 kJ/m2/day and 0.864 kJ/m2/day, respectively. Both tests under UV-B radiation showed a significant difference (p < 0.01) between species and treatments in the variables NS and ALP, with the minimum dose (T2).

Comparative investigation of toxicity induced by UV-A and UV-C radiation using Allium test

“…Hernandez-Aguilar et al ( 2020 ) reported that UV-C radiation may cause tissue deteriorations affecting growth of Phaseolus vulgaris L. seedlings depending on time. In addition, Foroughbakhch Pournavab et al ( 2019 ) demonstrated that different regions of UV radiation including UV-C caused remarkable damages in germination and growth in pine, soybeans, sunflower, and wheat. Even though responses of below-ground tissues of plants to UV remain unclear, Zhang et al ( 2020 ) suggested that UV-B radiation reduced the length of meristem and elongation regions of Arabidopsis thaliana (L.) Heynh.…”

The Effects of Cosmic and Ultraviolet Rays on Yeast and Seeds

“…The arugula seeds may possess different levels of these antioxidants from Wisconsin seeds, resulting in dissimilar responses to UV and cosmic damage. Differing coat thickness as a function of seed surface area could also affect permeability of seed coats, as demonstrated by Foroughbakhch Pournavab et al (2019). As for the experiment itself, there may have been sun angle differences through the window, different tube angles, and seeds could have clumped within the test tubes.…”

Systematic Review - State of the Art: strategies for vigor evaluation and production of high-vigor soybean seeds

“…The survey indicates a trend of studies related to the application of biological products in the seed, microorganisms isolated from the soil with rooting and nutrient-fixing action, promoting plant growth (PGPR) and their respective effects on germination, emergence, and seedling performance under ideal conditions or some type of environmental stress (Gregorio et al, 2017;Nazari et al, 2019;Khomari et al, 2018;Queiroz Rego et al, 2018;Tavanti et al, 2020;Abati et al, 2020;Paul and Rakshit, 2021;Sheteiwy et al, 2021). The studies grouped by physical treatments revealed the potential of new technologies such as electromagnetic field, laser, and the use of plasma to treat the seed or treat the water in which the seed will be soaked (Asghar et al, 2017;Kataria et al, 2017;Porto et al, 2018;Michalak et al,2019;Foroughbakhch et al, 2019;Pérez-Pizá et al,2019;Švubová et al, 2021;Mamlic et al, 2021).…”