Monochromatic light stimuli during embryogenesis enhance embryo development and posthatch growth

Abstract

Photostimulation with green light accelerated BW and muscle development of broilers. In experiment 1, temperature sensors were inserted into 50 broiler eggs. The eggs were placed under 5 green light-emitting diode (LED) lamps at an intensity of 0.1 W/m2 at eggshell level for 5, 10, 15, 20, and 25 min (n = 10). Egg temperatures were recorded continuously. A high correlation was found between lighting period and egg temperature elevation, and an intermittent light regimen of 15 min on and 15 min off was found to eliminate light-induced egg overheating. In experiment 2, the effect of in ovo green light photostimulation on embryonic development was studied. Five hundred fertile eggs were divided into 2 groups: the first was photostimulated with green light from 5 d of incubation until hatch (0.1 W/m2 intensity) and the second was incubated in the dark. In ovo green light photostimulation caused a significant elevation in BW and breast muscle weight during embryo development and posthatch until 6 d of age. In experiment 3, 240 fertile broiler eggs were divided into 2 groups as described in experiment 2. At hatch, chicks from each in ovo light treatment were divided into 2 subgroups: the first was reared under green light and the second under white light. In ovo photostimulation with green light enhanced BW and breast muscle weight. However, rearing under green light did not have any synergistic effect on BW. Collectively, the results suggest that stimulation with green light enhances development and growth in chicks and that the best effect is achieved when this stimulus is provided during incubation.

Exposing broiler eggs to green, red and white light during incubation

“…Archer (2016) observed that red light improved hatchability in white layer eggs, but not broiler eggs. Previous research has observed that exposing chicken (Rozenboim et al, 2004;Zhang et al, 2016) and turkey (Rozenboim et al, 2003) embryos to green light during incubation resulted in chicks with greater BWs and breast muscle weights. Halevy et al (2006) concluded that this increased growth due to green light exposure was due to enhanced proliferation and differentiation of adult myoblasts and myofiber synchronization.…”

Stimulation with monochromatic green light during incubation alters satellite cell mitotic activity and gene expression in relation to embryonic and posthatch muscle growth of broiler chickens

“…Rozenboim et al (2003) speculated that these contradictory findings are probably because of wide variability in the types of light sources, and the embryonic development accelerated by white light maybe because of an effect of overheating caused by incandescent lamps. Thus, to avoid the effect of overheating, Rozenboim et al (2003Rozenboim et al ( , 2004 carried out intermittent light regime (15 min on and 15 min off) in turkey and broilers by using a pure monochromatic light source based on light-emitting diode (LED) lamps. They found that green LED light photostimulation during embryogenesis enhanced embryo development and posthatch growth in broilers and turkeys (Rozenboim et al, 2003(Rozenboim et al, , 2004.…”

Changes of Plasma Growth Hormone, Insulin-Like Growth Factors-I, Thyroid Hormones, and Testosterone Concentrations in Embryos and Broiler Chickens Incubated under Monochromatic Green Light

“…Our present study also showed that green light stimuli during incubation significantly increased plasma IGF-I levels of embryos from E17 to E19, and of chickens from H3 to H35 than those incubated under dark condition. IGF-I stimulates the proliferation and DNA synthesis in chicken muscle satellite cells (Banes et al, 1995;Florini et al, 1996), enhances glucose and amino acid uptake and protein synthesis, and inhibits protein degradation in chicken muscle cells (Duclos et al, 1999), and subsequently induces the hypertrophy of adult skeletal muscle (Adams and McCue, 1998;Chakravarthy et al, 2000), which may partially explain why green light stimuli during embryogenesis enhanced embryo development and posthatch growth in broiler chickens in the previous studies (Rozenboim et al, 2004; Light stimuli in broiler embryos …”

“…One hundred and twenty male chicks from each incubation group were placed in 6 replicates with 20 birds each. All of the birds were housed under white light (30 lx at birdhead level) with a light schedule of 23 h light and 1 h dark according to Rozenboim et al (2004) and lights off from 21:00 h to 22:00 h as described by Zhang et al (2012). All the birds were allowed ad libitum access to a commercial diet for broiler chickens and 24-h access to water.…”

“…Rozenboim et al (2003Rozenboim et al ( , 2004 reported that intermittent monochromatic green light photostimulation during embryogenesis enhanced the embryo development and posthatch growth in broilers and turkeys. Recently, Zhang et al (2012Zhang et al ( , 2014 also found that continuous monochromatic green LED light stimuli during embryogenesis accelerated BW and posthatch pectoral muscle growth of broilers.…”