Effects of He-Ne laser on nuclear F-actin under UV-B radiation

Chen, H.; Han, Rong

doi:10.1134/s1021443715060047

Cited by 6 publications

(11 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…m -2 .d -1 the r atio w as d ecreased b y H e -Ne las er treatment esp eciall y dos es of 1 and 60 sec onds. T he s eedling length in l aser and UVA+B irradiat ed plants w ere higher t han thos e in the H e-Ne laser onl y. T hese r es ults ar e agreed wit h t hose of Yang et al (2012) and Chen and Han ( 2015) in t he f act t hat applying the He-N e l aser treatment partl y alleviated the damaging eff ect of ultr aviol et radiati on, d ue t o increase of s eedling length. The res ults of plants pretreat ed wit h l as er and U V A+ B radiation improv e t he hyp ot hesis of dam agerepair role of l as er to ultr aviol et radiation eff ects as clearly showen i n t he foll owing paramet er: slight incr eas e of plant length, leav es number, increase of root length, decreas e of shoot length/root l engt h and increase of leaf prameters at som e las er tratments .…”

Section: Discussionsupporting

confidence: 61%

“…Low i ntensit y He -N e las er radiation treatm ents c aus ed a decrea se i n shoot : root l engt h rati o, w hile the other meas ured morphological param et ers (Number of l eav es, leaves length, leav es area and Root lengt h) did not sig nificantl y dist urbed b y the low intensit y H e-Ne l aser. T he res ult of plant l engt h disagree with Chen and Han (2015), as he conclud ed that l engt h of seedlings rec eiv ed He-Ne laser treatm ent significantl y increased. Mut husam y et al…”

Section: Discussionmentioning

confidence: 99%

“…In current study, decreased leaf carotenoid, chlorophyll a/b ratio, hydrogen peroxide, and superoxide ion by exposure to UV-radiations was observed. Laser irradiation can increase the chloroplast protein content; however , the mechanism has not been described, possibly laser affects various chloroplast metabolic activities, resulting in increased protein content (Chen and Han, 2015) .…”

Section: Discussionmentioning

confidence: 99%

“…acc eler ating the rat e of dec ompositi on of lower entr opy m acrom olecul es. Las er is thought to ind uce enz ym e ac tivities and acc elerate enz yme-m ediat ed response, henc e, improvi ng t he biol ogical activi ti es (Daniel, 1996;Chen and H an, 2015) .…”

Section: Discussionmentioning

confidence: 99%

“…Hill reac tion activities r eveal the activit y of thes e OEC and helium neon laser p artl y r ecov er Hill r eac tion activit y, t hat w as inhibited b y ultr aviolet radiations (Chen and Han, 2015) . Las er might aff ect t he clust er of manganes e in O EC of phot os yst em II ( PS-II) and enhanc e t he O EC activit y.…”

Section: Discussionmentioning

confidence: 99%

See 4 more Smart Citations

Role of He-Ne laser pre-treatment in protecting Zea mays against the deleterious effects of ultraviolet radiations

Abu-Elsaoud¹,

Shahda²

2017

Egypt. J. Exp. Biol. (Bot.)

View full text Add to dashboard Cite

The current st udy aims to r ec ord the rol e of the pretreatment of Z ea m ays grains with a He-Ne las er in d amage rep air of ultr aviolet (UVA+B) radiati on eff ect. Plants wer e divided into f our groups; c ontrol group, group expos ed to t he He -Ne l aser onl y f or 1-300 sec onds, group expos ed t o U V A+ B only and protect ed group. In t he prot ect ed group the grains were tr eated with diff erent H e -Ne las er irradiation dur ation f or two w eeks t hen expos ed to 3. 6 and 7. 2 KJ m − 2 d −1 UVA+B radiation.Irradiation with H e-Ne las er significantl y (p ≤ 0.05) increas ed shoot length, number of l eav es, s hoot biomas s (week 1), root dr y w eight, c hl orophyll -a, chl orophyll -b, and t ot al c hlor ophyll . Sup eroxide free r adical, hydrogen peroxide and lipid peroxidation wer e decreas ed at l ow dos es and increas ed with higher dos es of las er. V arious d elet erious eff ects of ultravi olet r adiations w ere recorded in Zea m ays i ncluding decr eased phot os ynt hetic pigments, s hoot and root biomass, and root and shoot length. The pretreatm ent with a l aser bef ore expos ure t o UVA+B radiation c auses a slight i ncrease i n plant l engt h and t he number of leav es, an increase of r oot length, whil e a decreas e of shoot /root length and an i ncreas e i n l eaf paramet ers at s ome las er tr eatments wer e observed . T he res ults rev eal ed t hat the pretreatm ent of m aize grai ns wit h H e -N e laser dos es f or 10s to 300s allevi at ed the damaging eff ect s of U V-B radiati on in the range of 7.2 KJ m −2 d −1 UVA+B radiation. KEY WORDS:He-Ne las er, Ultravi olet r adiation, prot ectiv e role, pigments, oxidative stress, antioxidants, U V-B abs orbing compounds, flav onoids. I NTRODUCTI ON :Ultraviolet radiati ons (UV) ar e a nonionizing el ectrom agnetic spectr um t hat embraces about 8-9% of s ol ar energ y (Gill et al., 2015). O zone depleti on in the strat osphere has r esult ed in an increm ent i n ultravi olet-B irradiati on (UV-B ; 280-320 nm), which has pot entiall y destr uctiv e consequences for crop yield and production and aff ect nat ural environm ents (J ulkunenTiitto et al., 2005;Siipola et al ., 2015).Enhanc ed levels of ultravi olet r adiations trigger different str uct ural, p hysiol ogical and molec ular resp ons es i n plant s (Cas ati, 2003; Kum ari et al. , 2009; Sal ama et al. , 2011;Gill et al. , 2015). A higher d ose of UV-B prov ok es impairment and modific ation of macrom olec ules like DNA , RN A, and prot eins , decreas e net phot os ynthesis and adjust the activities of sev eral antioxidant enz ym es (Gill and T ut eja, 2010;Sharma et al., 2012). Nevert heless , plants hav e d evel oped v arious protectiv e strategies to m anage and withst and, agai nst high UV-B irradiation. The act ual accum ulation of U V -absorbing materi als c an cert ainl y help in the prev ention of U V penetrati on to vul ner able layers of the leaf . T his kind of c ompounds build -up withi n the upper epidermal l ayers of the leav es of sev eral higher plants purs uin...

show abstract

Section: Discussionsupporting

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations