Read by QxMD icon Read

plant peroxidases

Juliane Mendes Lemos Blainski, Argus Cesar da Rocha Neto, Eder Carlos Schimidt, José Afonso Voltolini, Márcio José Rossi, Robson Marcelo Di Piero
This study aimed to evaluate the effectiveness of exopolysaccharides (EPS) produced by Lactobacillus plantarum in controlling bacterial spot and eliciting defense mechanisms, and verify alterations in the tomato plant physiological responses. Tomato plants with five definitive leaves were sprayed with EPS, acibenzolar-S-methyl (ASM, positive control), or distilled water (negative control) and inoculated with Xanthomonas gardneri after 3 days. Local and systemic protection was evaluated 7, 15, and 21 days after inoculation...
April 14, 2018: Applied Microbiology and Biotechnology
Guangzheng Sun, Qichao Yang, Ancheng Zhang, Jia Guo, Xinjie Liu, Yang Wang, Qing Ma
The antifungal properties and the induction of resistance by ε-poly-l-lysine (ε-PL) and chitooligosaccharide (COS) were examined to find an alternative to synthetic fungicides currently used in the control of the devastating fungal pathogen Botrytis cinerea, the causal agent of grey mould disease of tomatoes. As presented herein, this combined treatment (200 mg/L ε-PL + 400 mg/L COS) was found to have optimal in vitro antifungal activities, achieving an inhibition rate of 90.22%. In vivo assays with these combined bio-fungicides, under greenhouse conditions using susceptible tomato plants, demonstrated good protection against severe grey mould...
April 4, 2018: International Journal of Food Microbiology
Wayne Young Liu, Shorong-Shii Liou, Tang-Yao Hong, I-Min Liu
The present study aimed to determine whether hesperidin, a plant-based active flavanone found in citrus fruits, can prevent high glucose-induced retinal pigment epithelial (RPE) cell impairment. Cultured human RPE cells (ARPE-19) were exposed to a normal glucose concentration (5.5 mM) for 4 d and then soaked in either normal (5.5 mM) or high (33.3 mM) concentrations of D-glucose with or without different concentrations of hesperidin (10, 20, or 40 µM) for another 48 h. The survival rates of the cells were measured using a 3-(4,5-dimethyl thiazol-2-yl)-2,5-diphenyl tetrazolium bromide reduction assay...
April 13, 2018: Planta Medica
Bo Fu, Margaret R Baker, Qing X Li
Plant secretory peroxidases are valuable commercial enzymes. The windmill palm tree Trachycarpus fortunei produces one of the most stable and fastest peroxidases (WPTP) characterized to date, however, an economical source is needed. Pichia pastoris has been used as an expression system for WPTP and other peroxidases. However, yeast and plants synthesize different types of N-linked glycan structures and may differ the level of glycosylation at each site. Such non-native glycosylation can have unwanted consequences...
April 12, 2018: Journal of Agricultural and Food Chemistry
Xing Li, Ao Yu Chen, Yang Wu, Li Wu, Lei Xiang, Hai Ming Zhao, Quan Ying Cai, Yan Wen Li, Ce Hui Mo, Ming Hung Wong, Hui Li
A pot experiment was conducted to investigate the effect of a series of β-cyclodextrin (β-CD) concentrations on bioremediation of soil co-contaminated with Cd and BDE-209 using amaranth and the white-rot fungus Phanerochaete chrysosporium, with BDE-209 degrading ability. Results showed that the white-rot fungus was beneficial to the growth of amaranth, Cd uptake and BDE-209 degradation. Addition of β-CD further increased biomass of both shoots and roots, shoot Cd concentrations and contents, chlorophyll concentrations and soil manganese peroxidase (MnP) activities...
April 5, 2018: Science of the Total Environment
Amna Ali Saddi, Azza Mostafa Mohamed, Abdulkader Mohamed Shaikh
The aim of this investigation was to study the antidiabetic impact of Cucumis melo var. flexuosus and/or Phoenix dactylifera fruit aqueous extracts and their mechanisms in repressing diabetes induced cardio-myopathy in diabetic rats. Type 2 diabetes was promoted in rats by a single intraperitoneal injection of streptozotocin (30mg/kg body wight). C. flexuosus and P. dactylifera extracts (200mg/kg body weight, each) were ingested to diabetic rats daily for a month. The results showed that ingestion of either plant extract or their combination to diabetic rats significantly diminished the glucose level and boosted the insulin concentration in the blood...
March 2018: Pakistan Journal of Pharmaceutical Sciences
F G Jesus, L Marchi-Werle, H D Fischer, L G Posadas, G L Graef, T Heng-Moss
The soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), is a limiting factor in soybean production in the North Central region of the USA. The objectives of this work were to identify sources of resistance to A. glycines in 14 soybean genotypes, and also document changes in total protein, peroxidase, and chlorophyll in response to aphid feeding. A reduced number of A. glycines was observed on the genotypes UX 2569-159-2-01 and UX 2570-171- 04, indicating the presence of antixenosis and/or antibiosis...
April 5, 2018: Neotropical Entomology
Xin Xiang, Lin Wu, Lining Mao, Yiming Liu
Azadirachta indica has previously been demonstrated to act as a multi‑functional medicinal plant for >2,000 years in India, and its neighboring countries. Currently, it is considered a natural resource with great value used in industrial product development and as a medicine for various types of diseases. The present study investigated the neuroprotective effects of Azadirachta indica which improved functional recovery in the 6‑hydroxydopamine induced rat Parkinson's disease (PD) model. Catalase, glutathione‑peroxidase, tumor necrosis factor‑α, interleukin (IL)‑1β, IL‑6, nuclear factor (NF)‑κB p65, inducible nitric oxide synthase (iNOS) and AChE activity levels were analyzed via ELISA...
March 28, 2018: Molecular Medicine Reports
Akash Tariq, Kaiwen Pan, Olusanya Abiodun Olatunji, Corina Graciano, Zilong Li, Feng Sun, Lin Zhang, Xiaogang Wu, Wenkai Chen, Dagang Song, Dan Huang, Tan Xue, Aiping Zhang
Alnus cremastogyne, a broad-leaved tree endemic to south-western China, has both commercial and restoration importance. However, little is known of its morphological, physiological and biochemical responses to drought and phosphorous (P) application. A randomized experimental design was used to investigate how drought affected A. cremastogyne seedlings, and the role that P applications play in these responses. Drought had significant negative effects on A. cremastogyne growth and metabolism, as revealed by reduced biomass (leaf, shoot and root), leaf area, stem diameter, plant height, photosynthetic rate, leaf relative water content, and photosynthetic pigments, and a weakened antioxidative defence mechanism and high lipid peroxidation level...
April 4, 2018: Scientific Reports
Shun-Wun Ke, Guan-Heng Chen, Chung-Tse Chen, Jason T C Tzen, Chin-Ying Yang
BACKGROUND: Tea is one of the most popular beverages in the world. There are many secondary metabolites can be found in tea such as anthocyanins, proanthocyanidins, flavonols and catechins. These secondary metabolites in plants are proved to act protective components for human health effect. Plant hormone ethylene is considered to have an important role in regulation of plant development and signal transduction. This study evaluated the effect of ethylene signaling regulation in phenolic compounds in tea plants...
April 3, 2018: Botanical Studies (Taipei, Taiwan)
Sung-Hwan Cho, Chung-Hee Lee, Eunji Gi, Yehyun Yim, Hee-Jong Koh, Kiyoon Kang, Nam-Chon Paek
In rice ( Oryza sativa ), moderate leaf rolling increases photosynthetic competence and raises grain yield; therefore, this important agronomic trait has attracted much attention from plant biologists and breeders. However, the relevant molecular mechanism remains unclear. Here, we isolated and characterized Rolled Fine Striped ( RFS ), a key gene affecting rice leaf rolling, chloroplast development, and reactive oxygen species (ROS) scavenging. The rfs-1 gamma-ray allele and the rfs-2 T-DNA insertion allele of RFS failed to complement each other and their mutants had similar phenotypes, producing extremely incurved leaves due to defective development of vascular cells on the adaxial side...
2018: Frontiers in Plant Science
Saeid Javadi Khederi, Mohammad Khanjani, Mansur Gholami, Onofrio Panzarino, Enrico de Lillo
Grape (Vitis vinifera) is commonly affected by the erineum strain of Colomerus vitis (GEM) in Iran and the susceptibility of grape cultivars to GEM is poorly understood. In order to evaluate the impact of GEM on grape and its defense mechanisms against the mite, an exploratory study was carried out on 19 cultivars (18 Iranian and the non-native Muscat Gordo). The differential susceptibility of cultivars to GEM was compared on the basis of the area of leaf damage induced by GEM. The cultivars White Thompson seedless of Bovanat, Atabaki Zarghan, Koladari Ghoochan and Sahebi Uroomie were less susceptible to GEM, whereas Ghalati Dodaj, Rishbaba, Muscat Gordo and Neyshaboori Birjand appeared to be the most affected by the mite...
April 2, 2018: Experimental & Applied Acarology
Damián Balfagón, Sara I Zandalinas, Pablo Baliño, María Muriach, Aurelio Gómez-Cadenas
Usually several environmental stresses occur in nature simultaneously causing a unique plant response. However, most of the studies until now have focused in individually-applied abiotic stress conditions. Carrizo citrange (Poncirus trifoliata L. Raf. X Citrus sinensis L. Osb.) and Cleopatra mandarin (Citrus reshni Hort. ex Tan.) are two citrus rootstocks with contrasting tolerance to drought and heat stress and have been used in this work as a model for the study of plant tolerance to the combination of drought and high temperatures...
March 27, 2018: Plant Physiology and Biochemistry: PPB
Syeda Tayyaba Batool Kazmi, Muhammad Majid, Sonia Maryam, Aymen Rahat, Madiha Ahmed, Muhammad Rashid Khan, Ihsan Ul Haq
Quercus dilatata Lindl. ex Royle was evaluated for in vitro polyphenol content and antioxidant potential as well as in vivo protective role against bisphenol A (BPA) induced hepatotoxicity. The distilled water-acetone (QDDAE) and methanol-ethyl acetate (QDMEtE) extracts were standardized and administered in high (300 mg/kg body weight (BW) and low (150 mg/kg BW) doses to Sprague Dawley rats, injected with BPA (25 mg/kg BW). Silymarin (50 mg/kg BW) was used as positive control. Subsequently, blood and liver homogenates were collected after four weeks of treatment, and the defensive effects of both extracts against oxidative damage and genotoxicity were assessed via hematological and biochemical investigations, determination of endogenous expression of enzymes as well as levels of free radicals and comet assay...
March 28, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Jun Ni, Qiaojian Wang, Faheem Afzal Shah, Wenbo Liu, Dongdong Wang, Shengwei Huang, Songling Fu, Lifang Wu
Melatonin has emerged as a research highlight regarding its important role in regulating plant growth and the adaptation to the environmental stresses. In this study, we investigated how melatonin prevented the cadmium toxicity to wheat seedlings. The results demonstrated that cadmium induced the expression of melatonin biosynthesis-related genes and cause a significant increase of endogenous melatonin level. Melatonin treatment drastically alleviated the cadmium toxicity, resulting in increased plant height, biomass accumulation, and root growth...
March 30, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Samira Khodayari, Fatemeh Abedini, David Renault
The plant stress hypothesis posits that a herbivore's reproductive success increases when it feeds on stressed plants, while the plant vigor hypothesis predicts that a herbivore preferentially feeds on more vigorous plants. We examined these opposing hypotheses by growing spider mites (Tetranychus urticae) on the leaves of stressed and healthy (vigorous) cucumber plants. Host plants were grown under controlled conditions at low, moderate, and high concentrations of NaCl (to induce salinity stress), at low, moderate, and high fertilizer concentrations (to support growth), and without these additions (control)...
March 29, 2018: Experimental & Applied Acarology
Anna Sola-Rabada, Padma Sahare, Graham J Hickman, Marco Vasquez, Leigh T Canham, Carole C Perry, Vivechana Agarwal
Porous silica-based materials are attractive for biomedical applications due to their biocompatibility and biodegradable character. In addition, inorganic supports such as porous silicon are being developed due to integrated circuit chip compatibility and tunable properties leading to a wide range of multidisciplinary applications. In this contribution, biosilica extracted from a rarely studied plant material (Equisetum Myriochaetum), its conversion to silicon and the potential for both materials to be used as supports for enzyme immobilization are investigated...
February 23, 2018: Colloids and Surfaces. B, Biointerfaces
Himanshu V Patankar, Ibtisam Al-Harrasi, Rashid Al-Yahyai, Mahmoud W Yaish
Although date palm is a relatively salt-tolerant plant, the molecular basis of this tolerance is complex and poorly understood. Therefore, this study aimed to identify the genes involved in salinity tolerance using a basic yeast functional bioassay. To achieve this, a date palm cDNA library was overexpressed in Saccharomyces cerevisiae cells. The expression levels of selected genes that make yeast cells tolerant to salt were subsequently validated in the leaf and root tissues of date palm seedlings using a quantitative PCR method...
March 29, 2018: DNA and Cell Biology
C F Resende, V S Pacheco, F F Dornellas, A M S Oliveira, J C E Freitas, P H P Peixoto
In this study, the activities of antioxidant enzymes, photosynthetic pigments, proline and carbohydrate contents in Pitcairnia encholirioides under ex vitro conditions of water deficit were evaluated. Results show that plants under progressive water stress, previously in vitro cultured in media supplemented with 30 g L-1 sucrose and GA3, accumulated more proline and increased peroxidase (POD) activity and the contents of photosynthetic pigments and carbohydrates. For plants previously in vitro cultured with 15 g L-1 sucrose and NAA, no differences were found for proline content and there were reductions in activities of peroxidase (POD), catalase (CAT) and poliphenoloxidase (PPO), and in contents of carbohydrates, with progress of ex vitro water deficit...
March 22, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
Kehinde O Erinle, Zhao Jiang, Bingbing Ma, Khalil Ur-Rehman, Andleeb Shahla, Ying Zhang
Pearl millet has been recommended beneficial for several therapeutic purposes. However, little is known of the physiological responses to abiotic stressors, especially of atrazine. In order to elucidate the physiological and molecular responses of pearl millet to atrazine stress, we studied the response of various biomarkers under increasing herbicide concentrations (0, 5, 10, and 50 mg/kg). We also quantified the levels of malondialdehyde (MDA) and reactive oxygen species (ROS) (H2 O2 and O2 •- ) produced in the leaves to evaluate the extent of oxidative damage...
March 21, 2018: International Journal of Phytoremediation
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"