Laser Irradiation Effects at Different Wavelengths on Phenology and Yield Components of Pretreated Maize Seed

Abstract

This study aims to compare the effects of different laser wavelengths, exposure times, and low-power-intensity laser irradiation on maize seeds. Seeds were exposed to He–Ne (632.8 nm) red laser, Nd:YAG second-harmonic-generation (532 nm) green laser, and diode (410 nm) blue laser. Four different exposure times (45, 65, 85, and 105 s) with different intensity (2 and 4 mW/cm2), for each laser were tested. Phenology and yield components (plant height, leaf area, number of rows per ear, seed yield, harvest index, yield efficiency, and grain weight) were determined. The experiment was conducted in a randomized complete block design with three replications. Plant height was found comparatively high in blue laser light—211 cm at 85 s. Blue and green laser lights showed significant increases in the number of rows per ear to 39.1 at 85 s and 45 at 65 s, respectively, compared to the control of 36 rows/ear. The order of seed yield was blue (7003.4 kg/ha) > green (6667.8 kg/ha) > red (6568.01 t/ha) based on different exposure times of 85 s, 85 s, and 105 s, respectively, compared to the control of 6.9 kg/ha. The findings indicate the possibility of using blue laser light to manipulate the growth and yield of maize.

Comparison of the effects of two laser photobiomodulation techniques on bio-physical properties of Zea mays L. seeds

“…Obtaining a high crop yield requires high-quality seeds that can produce rapid and uniform seedling emergence ( Hernandez-Aguilar, Dominguez-Pacheco & Cruz-Orea, 2015 ). Seed vigor is the physiological quality that related to rapid, uniform seedling emergence, and development under different soil conditions ( Hasan et al, 2020a ; Hasan et al, 2020b ).…”

“…To this aim, laser light has been particularly useful, owing to its specific characteristics ( Hernandez-Aguilar et al, 2009 ). Existing studies suggested a positive influence of pre-sowing seed exposure to laser beams on the induction of seed germination, initial seed development, and yield of selected seeds ( Chen et al, 2005 ; Ćwintal, Dziwulska-Hunek & Wilczek, 2010 ; Hasan et al, 2020a ; Li et al, 2013 ; Podlesna et al, 2015 ). However, little is known about the mechanism through which laser beams influence seeds and plants because few studies address it ( Álvarez et al, 2011 ; Hernandez-Aguilar, Dominguez-Pacheco & Cruz-Orea, 2015 ; Podlesna et al, 2015 ).…”

Effect of cadmium stress on certain physiological parameters, antioxidative enzyme activities and biophoton emission of leaves in barley (Hordeum vulgare L.) seedlings

“…Cadmium is one of the most harmful non-essential heavy metals that, regardless of its quantity, affects plants in a detrimental way by triggering severe disorders in plant functionality and structure [ 15 ]. In plant stress physiology, there is an increasing need for stress detection technologies with the help of which the physiological state of plants can be characterised with particular attention to non-invasiveness [ 16 , 17 ].…”

Impact of Coherent Laser Irradiation on Germination and Mycoflora of Soybean Seeds—Innovative and Prospective Seed Quality Management

“…Agricultural sustainability and food security are a priority not only within the European policy framework, but also on a global scale. Interest in the use of lasers in agriculture has existed for some time [1], but in recent years this technology has experienced a real renaissance, indeed, for some it is seen as the only correct way to produce healthy, high-quality food [2]. Laser technology is mainly used for pre-sown seed exposure in order to achieve better and faster germination in various, often unfavourable, habitat conditions.…”

“…Laser technology is mainly used for pre-sown seed exposure in order to achieve better and faster germination in various, often unfavourable, habitat conditions. The scientific literature has confirmed that it has various bio-stimulation effects (positive, negative, neutral), which are conditioned by the physical parameters of the laser, including radiation dose and exposure time, and the selection of plant material [2][3][4]. The inappropriate selection of physical parameters for the plant material may cause unwanted mutagenic effects [5,6].…”