The crystal structure of catalase-peroxidase from Synechococcus elongatus PCC7942 (SeKatG) was solved by molecular replacement and refined to an Rwork of 16.8% and an Rfree of 20.6% at 2.2 Å resolution. The asymmetric unit consisted of only one subunit of the catalase-peroxidase molecule, including a protoporphyrin IX haem moiety and two sodium ions. A typical KatG covalent adduct was formed, M...

Peroxidase and hydrogen peroxide both play important roles in the final stages of the lignification pathway. Peroxidase, in the presence of H2O2 catalyses the oxidation of monolignols to give lignin. In order to examine this process we looked at lignification in transgenic tobacco plants expressing a barley peroxidase gene, HvPrx8, either alone or in combination with a wheat germin gene, g.f 2....

30 This study aimed to improve the shelf life of Chinese red bayberries using vacuum impregnation. 31 Vacuum pressure of 5 kPa for 15 min, atmospheric pressure for 10 min, an impregnation temperature of 32 20 °C, alone or in combination with isotonic sucrose solution, 1% food-grade disodium stannous citrate 33 (DSC), and 2% food-grade calcium ascorbate were used for vacuum impregnation. Quality...

Plants activate antioxidant defense mechanisms under stress, which help maintaining the structural integrity of cell components and possibly reduces oxidative damage.  Low temperature stress leads to the production of reactive oxygen species and oxidative damage to plants. In this study, the effect of putrescine and proline on reducing the production of reactive oxygen species and increasing th...

Low water availability predicted under climate change is a major abiotic factor limiting plants growth and productivity. In this study greenhouse experiment was conducted on three important tree species of arid environment: Conocarpus erectus (CE), Acacia modesta (AM), Salix tetrasperma (ST). Young saplings were subjected to control (C), medium (MWD) severe soil deficit (SWD) treatments respons...

Leaf spot disease caused by Alternaria pathogens seriously threatens peony production. The physiological mechanism of resistance to the pathogen is little reported. This study aimed reveal defensive peonies in response tenuissima. disease-resistant (R) variety ‘Zi Fengyu’ and susceptible (S) ‘Heihai Botao’ were employed, some parameters leaves analyzed after inoculation with A. tenuissima, main...

Enhanced ultraviolet-B (UV-B) radiation and elevated tropospheric ozone alone may inhibit the growth of agricultural crops. However, research regarding their combined effects on growth and biochemical properties of roots is still scarce. Using open top chambers, we monitored the response of growth, secondary metabolites, endogenous hormones and enzyme activities of soybean roots to elevated O3 ...

Background and objectives: Silymarin is a unique flavonoid complex with documented hepatoprotective properties. Silybum marianum hairy root culture as a source for producing silymarin has been an important strategy for study the cell signaling pathway. In the present investigation Trichoderma strainsSilybum marianum hairy root cultures interactions have been studied. Methods: The effects of two...

introduction and aim: arsenic is a metalloid toxic for plants. arsenic is polluting the environment through the natural and artificial resources. it is harmful to human health. arsenic in plants for the production of the reactive oxygen species (ros) lead to destruction of nucleic acids and proteins in tissues of plants. it also reduces of photosynthesis and growth by destroy of the membranes o...