This paper provides an overview of existing literature on the ultraviolet-B (UV-B) radiation effects on field crops. Earlier reviews on field crop responses to UV-B considered few physiological processes or crops. For this review, we easily located about 129 studies on 35 crop species published since 1975. Here, we report the effects of UV-B radiation on visual symptoms, leaf ultrastructure and...

Abstract Background Photosynthetic pigments participating in the absorption, transformation and transfer of light energy play a very important role plant growth. While, spatial distribution foliar is an indicator environmental stress, such as pests, diseases heavy metal stress. Results In this paper, situ quantitative visualization chlorophyll carotenoid was realized by combining Raman spectros...

The effect of leachates of different phenological stages of Cassia occidentalis L. on Parthenium hysterophorus L. was studied. Seed germination, radicle length, plumule length and fresh and dry weight of Parthenium were recorded. Pigments and protein contents were also measured to evaluate relation between biochemical and biophysical parameters of Parthenium under stress. The leaf leachate of C...

a Institut de Physique du Globe de Paris & Université Paris Diderot — Paris 7 (UMR 7154), Géophysique spatiale et planétaire, Case 89, 4 place Jussieu, 75252 Paris Cedex 05, France b Laboratoire Ecologie, Systématique et Evolution (UMR 8079), Université Paris-Sud, 91405 Orsay Cedex, France c Department of Global Ecology, Carnegie Institution of Washington, 260 Panama Street, Stanford, CA 94305,...

In present era oxidative stresses induced by reactive oxygen species (ROS) have been considered the main cause of induction and progression of a number of chronic diseases. Hence, plant scientists, biochemists and pharmacists have focused their research on isolation and identification of plant metabolites having antioxidant capacities and ROS scavenging properties. Human dietary guidelines have...

Potatoes (Solanum tuberosum cv. ‘Hela’) were exposed in closed fumigation chambers for nine weeks until harvest in 1995. In three treatments ozone was applied as constant concentration (35 ppb for 24 h/d) as well as with peaks (110 ppb for 4 h/d and 65 ppb for 8 h/d) under equal dose conditions. In addition ozone was applied at constant concentration (47, 65 ppb for 24 h/d) in two treatments. I...

in order to study the response of five watermelon accessions (tn.93.765, tn.93.469, tn.93.485, tn.93.425 and tn.93.330) to drought stress an experiment was conducted as factorial experiment in randomized completely block design with three replications. this research were investigated in hydroponic system with four levels of osmotic potential induced by poly ethylene glycol 6000 (peg) including ...

Light emitting diodes (LEDs) are potential light sources for in vitro plant cultures. Here, axillary blackberry shoots were grown MS medium with indole-3-butyric acid (1 mg L−1), naphthalene acetic (0.5 and sucrose supplementation (0–60 g L−1) the cultures incubated under four treatments: three LED treatments (blue + red (2:1 spectral ratio), blue (1:2), cool warm white (1:1)) a standard flores...

This research is aimed at the assessing impact of ultraviolet radiation in A, B, and C ranges (as additives to main light) on general plan condition, stress experienced by them, pigment concentration leaves leaf reflective characteristics. Under studying, there were photo-protective reactions purple variety basil plants. The plants grown plastic pots a phyto-chamber equipped with an automatic m...