A5088218047- Sunflower and Safflower Cultivation
- Plant pathogens and resistance mechanisms
- Powdery Mildew Fungal Diseases
- Plant Parasitism and Resistance
- Antioxidant Activity and Oxidative Stress
- Photosynthetic Processes and Mechanisms
- Plant biochemistry and biosynthesis
- Genetic diversity and population structure
- Soybean genetics and cultivation
- Plant Pathogens and Resistance
- Genetic and Environmental Crop Studies
- Seed Germination and Physiology
- Plant Micronutrient Interactions and Effects
- Plant and animal studies
- Flowering Plant Growth and Cultivation
- Allelopathy and phytotoxic interactions
- Health disparities and outcomes
- Esophageal and GI Pathology
- Health and Medical Education
- Genetics and Plant Breeding
- Geriatric Care and Nursing Homes
- Plant-Microbe Interactions and Immunity
- Plant and soil sciences
- Marine and coastal plant biology
- Dementia and Cognitive Impairment Research
Bioversity International
2020-2024
International Center for Tropical Agriculture
2020-2024
National Agricultural Technology Institute
2007-2023
Universidad Nacional del Sur
2022
Instituto Nacional de Tecnologia
2009-2021
University of Freiburg
2015-2020
Florida International University
2017-2018
National University of San Luis
2014
Universidad de La Frontera
2011
Andrews University
2010
Significance Carotenoids are indispensable to plants and humans. Despite significant achievements in carotenoid research, we still lack the fundamental knowledge of regulatory mechanisms underlying carotenogenesis plants. Phytoene synthase (PSY) ORANGE (OR) two key proteins for biosynthesis accumulation plastids. This study shows that OR family interact directly with PSY function as major regulators active protein abundance mediating biosynthesis. The findings establish posttranscriptional...
Argentina has a long tradition of sunflower breeding, and its germplasm is valuable genetic resource worldwide. However, knowledge the constitution variability levels Argentinean still scarce, rendering global map cultivated diversity incomplete. In this study, 42 microsatellite loci 384 single nucleotide polymorphisms (SNPs) were used to characterize first association mapping population for quantitative trait in sunflower, along with selection allied open-pollinated composite populations...
Phytoene synthase (PSY) catalyzes the highly regulated, frequently rate-limiting synthesis of first biosynthetically formed carotene. While PSY constitutes a small gene family in most plant taxa, Brassicaceae, including Arabidopsis (Arabidopsis thaliana), predominantly possess single gene. This monogenic situation is compensated by differential expression two alternative splice variants (ASV), which differ length and exon/intron retention their 5′UTRs. ASV1 contains long 5′UTR (untranslated...
Abstract Background Sclerotinia Head Rot (SHR) is one of the most damaging diseases sunflower in Europe, Argentina, and USA, causing average yield reductions 10 to 20 %, but leading total production loss under favorable environmental conditions for pathogen. Association Mapping (AM) a promising choice Quantitative Trait Locus (QTL) mapping, as it detects relationships between phenotypic variation gene polymorphisms existing germplasm without development mapping populations. This article...
The net amounts of carotenoids accumulating in plant tissues are determined by the rates biosynthesis and degradation. While is rate-limited activity PHYTOENE SYNTHASE (PSY), carotenoid losses caused catabolic enzymatic non-enzymatic We established a system based on non-green Arabidopsis callus which allowed investigating major determinants for high steady-state levels β-carotene. Wild-type development was characterized strong degradation only marginally cleavage oxygenases. In contrast,...
Abstract Carotenoid levels in plant tissues depend on the relative rates of synthesis and degradation molecules pathway. While carotenoid biosynthesis has been extensively characterized, research catabolism into apocarotenoids is a relatively novel field. To identify apocarotenoid metabolic processes, we characterized transcriptome transgenic Arabidopsis (Arabidopsis thaliana) roots accumulating high β-carotene and, consequently, β-apocarotenoids. Transcriptome analysis revealed feedback...
Modern breeding of sunflower ( Helianthus annuus L .), which started 100 years ago, increased the number and diversity cultivated forms. In addition, for more than 50 years, wild other species have been collected in North America where they all originated. Collections both forms are maintained gene banks many countries is an important crop, with some specificity according to availability germplasm local research programmes. Cultivated material includes land races, open pollinated varieties,...
Cassava (Manihot esculenta Crantz) biofortification with provitamin A carotenoids is an ongoing process that aims to alleviate vitamin deficiency. The moderate content of achieved so far limits the contribution providing adequate dietary levels. Strategies increase carotenoid focused on genes from biosynthesis pathway. In recent years, special emphasis was given ORANGE protein (OR), which promotes accumulation and their stability in several plants. aim this work identify, characterize...
Sunflower germplasm collections are valuable resources for broadening the genetic base of commercial hybrids and ameliorate risk climate events. Nowadays, most studied worldwide sunflower pre-breeding belong to INTA (Argentina), INRA (France), USDA-UBC (United States America–Canada). In this work, we assess amount distribution diversity (GD) available within between these estimate pattern global diversity. A mixed genotyping strategy was implemented, by combining proprietary...
Abstract The pericarp anatomy and the effects of storage after harvest, temperature early cypsela imbibition on phytohormone profiles were studied in inbred sunflower lines B123 B91. On day 0, germination cypselas was near 0%, indicating dormancy, whereas that B91 100%, non‐dormancy. 33 at room (25 °C) similar. Cell wall thickness sclerification higher than B91, suggesting structural characteristics may contribute to physical dormancy B123. Jasmonates ( JA s), salicylic acid SA ) abscisic...
Over 5% of the world's population has varying degrees hearing loss. Mutations in GJB2 are most common cause autosomal recessive non-syndromic loss (ARNHL) many populations. The frequency and type mutations influenced by ethnicity. Guatemala is a multi-ethnic country with four major populations: Maya, Ladino, Xinca, Garifuna. To determine mutation profile ARNHL from Guatemala, we sequenced both exons 133 unrelated families. A total six pathogenic variants were detected. frequent variant...
Zinc deficiency is a major public health problem in vulnerable populations of Latin America and the Caribbean. Biofortification rice ( Oryza sativa L.) with zinc has potential to alleviate deficiencies. However, as plant breeding processes can alter grain culinary quality favorable sensory attributes, consumer acceptability need be assessed prior releasing variety public. A characterization analysis were carried out two varieties biofortified local control both Bolivia Colombia. The aim this...
Open-pollinated (OPs) and composite populations (CPs) represent a valuable resource for sunflower breeding programmes. However, little is known about the levels distribution of genetic variation within each these populations. In this study, quantitative qualitative traits along with molecular markers were used to evaluate 14 from Instituto Nacional de Tecnología Agropecuaria (INTA) germplasm collection. These chosen historically important accessions that still play central role INTA...
Diseases caused by necrotrophic fungi, such as the cosmopolitan Sclerotinia sclerotiorum and Diaporthe/Phomopsis complex, are among most destructive diseases of sunflower worldwide. The lack complete resistance combined with inefficiency chemical control makes assisted breeding best strategy for disease control. In this work, we present an integrated genome-wide association (GWA) study investigating response a diverse panel inbred lines to both pathogens. Phenotypic data head rot (SHR)...
Nothofagus nitida (Phil.) Krasser (Nothofagaceae) regenerates under the canopy in microsites protected from high light. Nonetheless, it is common to find older saplings clear areas and adults as emergent trees of Chilean evergreen forest. We hypothesized that this shade sun transition N. supported by an increase photochemical non-photochemical energy dissipation capacities both photosystems parallel with plant size light availability. To dissect relative contribution environment...
Broomrape is one of the most critical biotic constraints to sunflower crop production. In extended area world, distributed across Black sea region, this parasitic weed shows a high occurrence. The weed, originally from Caucasus has progressively migrated South Eurasia continent. actual invaded reaches Spain, Israel, Kazakhstan, China, Mongolia and Iran. Due usual seed exchange between macro-regions it not clear why absent in other located America. It possible that invasive process could be...
Abstract Background Sclerotinia sclerotiorum is a necrotrophic fungus that causes head rot (SHR) in sunflower, with epidemics leading to severe yield losses. In this work, we present an association mapping (AM) approach investigate the genetic basis of natural resistance SHR cultivated fourth most widely grown oilseed crop world. Results Our population (AMP), which comprises 135 inbred breeding lines (ILs), was genotyped using 27 candidate genes, panel 9 Simple Sequence Repeat (SSR) markers...
Sclerotinia head rot (SHR) is one of the most serious constraints to sunflower (Helianthus annuus L. var. macrocarpus) production worldwide. Here, we evaluated response SHR in a inbred panel from large INTA germplasm collection, consisting 137 lines (ILs). Field trials were performed over five consecutive seasons using twice-replicated randomized complete-block design. Disease incidence, disease severity, incubation period, and area under progress curve for incidence severity determined...
Abstract Sunflower Verticillium Wilt and Leaf Mottle (SVW), caused by dahliae (Kleb.; Vd ), is a soil-borne disease affecting sunflower worldwide. A single dominant locus, known as V1, was formerly effective in controlling North-American races, whereas races from Argentina, Europe an emerging race USA overcome its resistance. This emphasizes the need for identifying broad-spectrum genetic resistance (BSR) sources. Here we characterize two mapping populations (MPs) SVW resistance: biparental...