The Experts below are selected from a list of 119562 Experts worldwide ranked by ideXlab platform
Inigo Zabalgogeazcoa - One of the best experts on this subject based on the ideXlab platform.
-
fungal endophyte epichloe festucae alters the Nutrient Content of festuca rubra regardless of water availability
PLOS ONE, 2013Co-Authors: Beatriz R Vazquezdealdana, A Garciaciudad, B Garciacriado, S Vicentetavera, Inigo ZabalgogeazcoaAbstract:Festuca rubra plants maintain associations with the vertically transmitted fungal endophyte Epichloe festucae. A high prevalence of infected host plants in semiarid grasslands suggests that this association could be mutualistic. We investigated if the Epichloe-endophyte affects the growth and Nutrient Content of F. rubra plants subjected to drought. Endophyte-infected (E+) and non-infected (E-) plants of two half-sib lines (PEN and RAB) were subjected to three water availability treatments. Shoot and root biomass, Nutrient Content, proline, phenolic compounds and fungal alkaloids were measured after the treatments. The effect of the endophyte on shoot and root biomass and dead leaves depended on the plant line. In the PEN line, E+ plants had a greater S:R ratio than E-, but the opposite occurred in RAB. In both plant lines and all water treatments, endophyte-infected plants had greater concentrations of N, P and Zn in shoots and Ca, Mg and Zn in roots than E- plants. On average, E+ plants contained in their shoots more P (62%), Zn (58%) and N (19%) than E- plants. While the proline in shoots increased in response to water stress, the endophyte did not affect this response. A multivariate analysis showed that endophyte status and plant line impose stronger differences in the performance of the plants than the water stress treatments. Furthermore, differences between PEN and RAB lines seemed to be greater in E- than in E+ plants, suggesting that E+ plants of both lines are more similar than those of their non-infected version. This is probably due to the endophyte producing a similar effect in both plant lines, such as the increase in N, P and Zn in shoots. The remarkable effect of the endophyte in the Nutrient balance of the plants could help to explain the high prevalence of infected plants in natural grasslands.
-
effects of the infection by the fungal endophyte epichloe festucae in the growth and Nutrient Content of festuca rubra
European Journal of Agronomy, 2006Co-Authors: Inigo Zabalgogeazcoa, Antonia Garcia Ciudad, Beatriz Vazquez R De Aldana, Balbino Garcia CriadoAbstract:Festuca rubra, a commercially important turfgrass, is a common species in natural semiarid grasslands of western Spain. In natural populations of this grass, about 70% of the individuals are infected by the fungal endophyte Epichloe festucae. In most cases, infected plants are asymptomatic. To test if there were differences in growth or Nutrient Content between infected (E+) and uninfected (E-) plants, five half-sib lines of F. rubra were used. Each line consisted of E+ and E- individuals. These plants were used for a 5 years long field experiment in conditions typical of the surrounding semiarid grasslands. The soil was poor in Nutrients, and rainfall was scarce in the spring and summer. No differences in biomass production or number of stems were observed between E+ and E- plants. Regarding Nutrient Content, E+ plants in vegetative state contained more phosphorus than E- plants. This effect was consistently observed in the 3 years that this type of tissue was analyzed. In one of these 3 years Mn Content was lower in E+ plants than in their E- counterparts. In plants in a reproductive stage, differences between E+ and E- plants were found with respect to Ca, Mg, and Cu Content. In this developmental stage, the Contents of neutral detergent fiber and lignin were lower in infected plants, and their organic matter digestibility was greater. The evidence presented in this study shows that in field conditions, the Content of certain Nutrients, P in particular, and fiber constituents of F. rubra are altered when the plants are infected by the endophyte E. festucae. Since most Nutrients were found in concentrations below the adequate range for plant growth, increased P Content is a beneficial effect of E. festucae infection. This fact helps to explain why endophyte infection incidence is high in natural populations of F. rubra, and why the development of endophyte infected turfgrass cultivars may be useful for low maintenance lawns.
Balbino Garcia Criado - One of the best experts on this subject based on the ideXlab platform.
-
effects of the infection by the fungal endophyte epichloe festucae in the growth and Nutrient Content of festuca rubra
European Journal of Agronomy, 2006Co-Authors: Inigo Zabalgogeazcoa, Antonia Garcia Ciudad, Beatriz Vazquez R De Aldana, Balbino Garcia CriadoAbstract:Festuca rubra, a commercially important turfgrass, is a common species in natural semiarid grasslands of western Spain. In natural populations of this grass, about 70% of the individuals are infected by the fungal endophyte Epichloe festucae. In most cases, infected plants are asymptomatic. To test if there were differences in growth or Nutrient Content between infected (E+) and uninfected (E-) plants, five half-sib lines of F. rubra were used. Each line consisted of E+ and E- individuals. These plants were used for a 5 years long field experiment in conditions typical of the surrounding semiarid grasslands. The soil was poor in Nutrients, and rainfall was scarce in the spring and summer. No differences in biomass production or number of stems were observed between E+ and E- plants. Regarding Nutrient Content, E+ plants in vegetative state contained more phosphorus than E- plants. This effect was consistently observed in the 3 years that this type of tissue was analyzed. In one of these 3 years Mn Content was lower in E+ plants than in their E- counterparts. In plants in a reproductive stage, differences between E+ and E- plants were found with respect to Ca, Mg, and Cu Content. In this developmental stage, the Contents of neutral detergent fiber and lignin were lower in infected plants, and their organic matter digestibility was greater. The evidence presented in this study shows that in field conditions, the Content of certain Nutrients, P in particular, and fiber constituents of F. rubra are altered when the plants are infected by the endophyte E. festucae. Since most Nutrients were found in concentrations below the adequate range for plant growth, increased P Content is a beneficial effect of E. festucae infection. This fact helps to explain why endophyte infection incidence is high in natural populations of F. rubra, and why the development of endophyte infected turfgrass cultivars may be useful for low maintenance lawns.
Weifu Lin - One of the best experts on this subject based on the ideXlab platform.
-
calla lily intercropping in rubber tree plantations changes the Nutrient Content microbial abundance and enzyme activity of both rhizosphere and non rhizosphere soil and calla lily growth
Industrial Crops and Products, 2019Co-Authors: Lijun Zhou, Weifu LinAbstract:Abstract Rubber is a globally important crop species and is widely grown in Hainan, China; the development of efficient agricultural practices is essential when attempting to maximize productivity. The effects of interspecific competition for Nutrients and calla lily (Alocasia macrorrhizos L.) intercropping on calla lily growth, development, and Nutrient uptake were investigated in rubber tree (Hevea brasiliensis Mull. Arg.) plantations. The Nutrient abundances, enzyme activity, and number of microbes present in rhizosphere and non-rhizosphere soil were determined. Barriers were inserted between the crops to separate their root systems and nullify belowground competition to facilitate the analysis of intercrop competition. We found that in the rubber tree/calla lily intercropping system, Nutrient Content and soil urease activities in rhizosphere and non-rhizosphere soil significantly decreased, and nitrogen (N) and potassium (K) taken up by calla lilies, and the growth and biomasses of calla lilies significantly decreased. In contrast, soil sucrase, acid phosphatase, and catalase activities and the quantity of fungi in rhizosphere and non-rhizosphere soil significantly increased, and phosphorus (P) uptake, root length, and the ratio of root to shoot dry weights in calla lilies also significantly increased. Intercropping significantly decreased the abundances of both bacteria and actinomycetes and decreased total microbial abundance in rhizosphere soil, but significantly increased their abundances in non-rhizosphere soil. The Nutrient Content (excluding organic matter Content and pH) in rhizosphere soil was lower than in non-rhizosphere soil. These findings indicate that Nutrient competition between rubber trees and calla lilies was significant in this intercropping system, with rubber trees holding a competitive advantage. Intercropping significantly inhibited calla lily growth by significantly decreasing soil Nutrient Content. The abundances of soil microbes and changes in root architectures correspond to the responses of calla lilies to Nutrient competition, allowing the adjustment of the plants’ nutritional needs during growth and development.
Lei Zhang - One of the best experts on this subject based on the ideXlab platform.
-
evaluation of Nutrient Content and caloric density in commercially available foods formulated for senior cats
Journal of Veterinary Internal Medicine, 2020Co-Authors: Stacie C Summers, Jonathan Stockman, Jennifer A Larsen, Anais Sanchez Rodriguez, Lei ZhangAbstract:Author(s): Summers, Stacie C; Stockman, Jonathan; Larsen, Jennifer A; Sanchez Rodriguez, Anais; Zhang, Lei | Abstract: BackgroundCat foods marketed for senior cats (≥7 years) are available to owners. The variability in the nutritional Content of these foods is unknown.ObjectivesTo measure the caloric density and caloric distribution of crude protein, crude fiber, crude fat, phosphorus, calcium, magnesium, sodium, potassium, and vitamin D3 in commercially available foods for senior cats and to compare Nutrient Content with foods for adult cats.SamplesThirty-one senior and 59 adult commercial nontherapeutic cat food products.MethodsDescriptive study. Crude protein, crude fiber, and crude fat were measured using Dumas nitrogen combustion, Ankom filter bag technique, and acid hydrolysis, respectively. Mineral concentrations were measured using inductively coupled argon plasma-optical emission spectroscopy. Vitamin D3 was determined by liquid chromatography with tandem mass spectrometry. Caloric density was calculated using modified Atwater values.ResultsThe evaluated Nutrient concentrations in all foods for senior cats met the values of the Association of American Feed Control Officials Cat Food Nutrient Profile for adult maintenance. Foods for senior cats had significantly higher crude fiber Content when compared to foods for adult cats (P l .0001). No significant difference in crude protein, crude fat and mineral concentrations was found between foods for senior and adult cats.Conclusions and clinical importanceFoods marketed for senior cats are highly variable in their caloric density and Nutrient Content and, except for crude fiber, are similar to foods for adult cats. Veterinarians should avoid broad recommendations regarding commercially available foods for senior cats, and dietary recommendations should reflect the patient's individual needs.
Rene Eschen - One of the best experts on this subject based on the ideXlab platform.
-
the foliar endophytic fungal community composition in cirsium arvense is affected by mycorrhizal colonization and soil Nutrient Content
Fungal Biology, 2010Co-Authors: Rene Eschen, Alan C Gange, Stephanie Hunt, Charlotte Mykura, Brian C SuttonAbstract:Abstract Foliar fungal endophytes are ubiquitous, but understudied symbionts of most plant species; relatively little is known about the factors affecting their occurrence, diversity and abundance. We tested the effects of soil Nutrient Content and arbuscular mycorrhizal (AM) colonization on the occurrence of foliar endophytic fungi in Cirsium arvense in two field studies. In the first study, we assessed relationships between soil moisture, organic matter, carbon and nitrogen Content and plant water, nitrogen and carbon Content and AM colonization and the occurrence of foliar endophytic fungal species. In the second study, we manipulated soil Nutrient Content and AM colonization of potted seedlings and identified differences in endophytic fungal species composition of the leaves and stems. The results reveal that endophytes can occur either more or less frequently, depending on soil Nutrient and plant water Content and AM colonization. We propose that these patterns were the result of differences in fungal growth responses to Nutrient availability in the leaves, which can be affected by resources obtained from the soil or symbiotic fungi in the roots.
