Ascorbic acid promotes graft-take in sweet pepper plants (Capsicum annuum L.)

2008 ◽  
Vol 116 (4) ◽  
pp. 343-347 ◽  
Author(s):  
Masahumi Johkan ◽  
Masayuki Oda ◽  
Genjiro Mori
Keyword(s):  
Ascorbic Acid ◽  
Capsicum Annuum ◽  
Sweet Pepper ◽  
Capsicum Annuum L ◽  
Graft Take ◽  
Pepper Plants

Sensitivity of sweet pepper plants (Capsicum annuum L.) to iron excess

2018 ◽  
pp. 382-387
Author(s):  
F. Casierra-Posada ◽  
◽  
J.A. Camargo-Parra ◽  
M.C. Acosta ◽  
◽  
...  
Keyword(s):  
Capsicum Annuum ◽  
Sweet Pepper ◽  
Capsicum Annuum L ◽  
Pepper Plants

Enhancement of microspore embryogenesis induction and plantlet regeneration of sweet pepper (Capsicum annuum L.) using putrescine and ascorbic acid

PROTOPLASMA ◽  
2018 ◽  
Vol 256 (1) ◽  
pp. 13-24 ◽  
Author(s):  
Ali Akbar Heidari-Zefreh ◽  
Mehran E. Shariatpanahi ◽  
Amir Mousavi ◽  
Sepideh Kalatejari
Keyword(s):  
Ascorbic Acid ◽  
Capsicum Annuum ◽  
Microspore Embryogenesis ◽  
Sweet Pepper ◽  
Plantlet Regeneration ◽  
Capsicum Annuum L

scholarly journals PEROXIDASE ACTIVITY AS AN INDICATOR OF WATER STRESS IN SWEET PEPPER PLANTS

Irriga ◽  
2006 ◽  
Vol 11 (4) ◽  
pp. 441-447 ◽  
Author(s):  
Antonio Evaldo Klar ◽  
Sidnei Osmar Jadoski ◽  
Giusepina Pace Pereira Lima
Keyword(s):  
Water Stress ◽  
Soil Water ◽  
Capsicum Annuum ◽  
Peroxidase Activity ◽  
Water Availability ◽  
Soluble Protein ◽  
Sweet Pepper ◽  
Capsicum Annuum L ◽  
Physiological And Biochemical ◽  
Pepper Plants

PEROXIDASE ACTIVITY AS AN INDICATOR OF WATER STRESS IN SWEET PEPPER PLANTS                                             Antonio Evaldo Klar1; Sidnei Osmar Jadoski2; Giusepina Pace Pereira Lima31Departamento de Engenharia Rural, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Botucatu, SP, [email protected] Estadual do Centro Oeste,  Centro de Ciências Agrárias e Ambientais, Guarapuava, Pr3Departamento de Bioquímica, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Botucatu, SP  1 ABSTRACT             The purpose of the study was to evaluate the physiological and biochemical behavior of sweet pepper (Capsicum annuum L.) plants under different soil water availability conditions and the efficiency of the peroxidase (EC. 1.11.1.7) activity as an indicator of water stress in plants. The experiment was carried out at the Faculdade de Ciências Agronômicas – UNESP, Botucatu, SP. Sweet pepper plants were grown for 230 days after transplanting of seedlings and arranged in a completely randomized experimental design with 4 treatments, two irrigation managements (50 and 1500 kPa) and two soil surface managements (presence or absence of black polyethylene covering), and six replications. Physiological activities, such as stomatal transpiration and resistance to water vapor diffusion, were evaluated as well as biochemical activities, such as peroxidase activity and total soluble protein in foliar tissues. It was observed that soil water availability may lead to physiological and biochemical alterations in plants. Successive water stress cycles may promote the development of characteristics responsible for improving  plant tolerance to periods of low water availability. The peroxidase enzyme activity showed to be an efficient indicator of water stress in sweet pepper plants. KEYWORDS: enzymatic activity; soil moisture; vegetable physiology; soluble protein; Capsicum annuum L.  KLAR, A. E.; JADOSKI, S. O.; LIMA, G. P. P.  A PEROXIDASE COMO INDICADOR DE DÉFICITS HÍDRICOS EM PLANTAS DE PIMENTÃO.  2 RESUMO O objetivo do presente estudo foi avaliar o comportamento fisiológico e bioquímico do pimentão (Capsicum annuum L) sob diferentes condições de disponibilidade de água no solo, além da eficiência da peroxidase (EC 1.11.1.7) como indicador de déficits hídricos nas plantas. O experimento foi desenvolvido na Faculdade de Ciências Agronômicas – UNESP, Botucatu, SP, durante 230 dias após o transplante das plântulas em condições de ambiente protegido com quatro tratamentos: dois níveis de irrigação (-50 e – 1500 kPa como potenciais mínimos de água do solo) e dois manejos de cobertura do solo (com e sem cobertura de lonas de polietileno preto) com seis repetições.  As atividades fisiológicas, como a resistência difusiva dos estômatos e a transpiração foram avaliadas, assim como a peroxidase e a proteina solúvel, nos tecidos foliares. Os resultados mostraram que os déficits hídricos alteraram os fatores fisiológicos estudados e promoveram respostas positivas para a tolerância à déficits hídricos.  A peroxidase mostrou ser um eficiente indicador de estresse hídrico em plantas de pimentão. UNITERMOS: irrigação, cobertura morta, potencial de água no solo, proteina solúvel.

scholarly journals Multispectral Assessment of Sweet Pepper (Capsicum annuum L.) Fruit Quality Affected by Calcite Nanoparticles

Biomolecules ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 832
Author(s):  
Monika Vidak ◽  
Boris Lazarević ◽  
Marko Petek ◽  
Jerko Gunjača ◽  
Zlatko Šatović ◽  
...  
Keyword(s):  
Convex Hull ◽  
Capsicum Annuum ◽  
Fruit Quality ◽  
Sweet Pepper ◽  
Quality Analysis ◽  
Morphological Properties ◽  
Agricultural Practice ◽  
Vegetable Crops ◽  
Physiological Maturity ◽  
Capsicum Annuum L

Sweet pepper (Capsicum annuum L.) is one of the most important vegetable crops in the world because of the nutritional value of its fruits and its economic importance. Calcium (Ca) improves the quality of sweet pepper fruits, and the application of calcite nanoparticles in agricultural practice has a positive effect on the morphological, physiological, and physicochemical properties of the whole plant. The objectives of this study were to investigate the effect of commercial calcite nanoparticles on yield, chemical, physical, morphological, and multispectral properties of sweet pepper fruits using a combination of conventional and novel image-based nondestructive methods of fruit quality analysis. In the field trial, two sweet pepper cultivars, i.e., Šorokšari and Kurtovska kapija, were treated with commercial calcite nanoparticles (at a concentration of 3% and 5%, calcite-based foliar fertilizer (positive control), and water (negative control) three times during vegetation). Sweet pepper fruits were harvested at the time of technological and physiological maturity. Significant differences were observed between pepper cultivars as well as between harvests times. In general, application of calcite nanoparticles reduced yield and increased fruit firmness. However, different effects of calcite nanoparticles were observed on almost all properties depending on the cultivar. In Šorokšari, calcite nanoparticles and calcite-based foliar fertilizers significantly increased N, P, K, Mg, Fe, Zn, Mn, and Cu at technological maturity, as well as P, Ca, Mg, Fe, Zn, Mn, Cu, and N at physiological maturity. However, in Kurtovska kapija, the treatments increased only Ca at technological maturity and only P at physiological maturity. The effect of treatments on fruit morphological properties was observed only at the second harvest. In Šorokšari, calcite nanoparticles (3% and 5%) increased the fruit length, minimal circle area, and minimal circle radius, and it decreased the fruit width and convex hull compared to the positive and negative controls, respectively. In Kurtovska kapija, calcite nanoparticles increased the fruit width and convex hull compared to the controls. At physiological maturity, lower anthocyanin and chlorophyll indices were found in Kurtovska kapija in both treatments with calcite nanoparticles, while in Šorokšari, the opposite effects were observed.

scholarly journals Sweet Pepper (Capsicum annuum L.) Fruits Contain an Atypical Peroxisomal Catalase That Is Modulated by Reactive Oxygen and Nitrogen Species

Antioxidants ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 374 ◽  
Author(s):  
Marta Rodríguez-Ruiz ◽  
Salvador González-Gordo ◽  
Amanda Cañas ◽  
María Jesús Campos ◽  
Alberto Paradela ◽  
...  
Keyword(s):  
Capsicum Annuum ◽  
Fruit Ripening ◽  
Reactive Oxygen ◽  
Bovine Liver ◽  
Sweet Pepper ◽  
Cysteine Residue ◽  
Nitrogen Species ◽  
Capsicum Annuum L ◽  
Native Molecular Mass ◽  
Pepper Fruit

During the ripening of sweet pepper (Capsicum annuum L.) fruits, in a genetically controlled scenario, enormous metabolic changes occur that affect the physiology of most cell compartments. Peroxisomal catalase gene expression decreases after pepper fruit ripening, while the enzyme is also susceptible to undergo post-translational modifications (nitration, S-nitrosation, and oxidation) promoted by reactive oxygen and nitrogen species (ROS/RNS). Unlike most plant catalases, the pepper fruit enzyme acts as a homodimer, with an atypical native molecular mass of 125 to 135 kDa and an isoelectric point of 7.4, which is higher than that of most plant catalases. These data suggest that ROS/RNS could be essential to modulate the role of catalase in maintaining basic cellular peroxisomal functions during pepper fruit ripening when nitro-oxidative stress occurs. Using catalase from bovine liver as a model and biotin-switch labeling, in-gel trypsin digestion, and nanoliquid chromatography coupled with mass spectrometry, it was found that Cys377 from the bovine enzyme could potentially undergo S-nitrosation. To our knowledge, this is the first report of a cysteine residue from catalase that can be post-translationally modified by S-nitrosation, which makes it especially important to find the target points where the enzyme can be modulated under either physiological or adverse conditions.

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