cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.22268741
title: Impacts of climate change on water fluxes and soybean growth in southern Brazil

description: ABSTRACT Climate is a determining factor in agricultural production and climate change can affect this productivity. This, study aims to analyze the consequences of climatic change in the soil water dynamic and growth soybean in Southern Brazil. Scenarios were created for conditions of a 2 ºC temperature increase, a 20% reduction, and a 50% increase in precipitation rates, representing hot, dry and wet scenarios, respectively. The atmospheric forcing generated were used as input data for the agricultural version of the Integrated Biosphere Simulator model (Agro-IBIS) and simulations were carried out for a soybean growing season in the northwestern Rio Grande do Sul, Brazil. The following variables estimated by Agro-IBIS were analyzed: soil moisture, soybean leaf area index, evaporation, and transpiration. The results showed that the climatic changes projected by the simulations influence soybean growth in the study area. By increasing the temperature in 2 °C, the Agro-IBIS model indicated the occurrence of shorter crop growth cycles and even more impactful results on the leaf area index, with a 70% reduction in the highest values. Furthermore, a 50% increase in precipitation rate showed positive effects on agriculture, indicated by increased LAI in the reproductive period. On the other hand, a 20% reduction in precipitation has a negative effect, as it exposes the crop to water deficit conditions, impacting soil moisture and decreasing LAI. The soil evaporation is also intensified with increased temperatures due to the higher evaporative demand of the atmosphere and a significant decline in LAI. The transpiration for the hot scenario is more strongly impacted during the vegetative growth stage and leaf senescence.
DOI: 10.6084/m9.figshare.22268741.v1
title: Impacts of climate change on water fluxes and soybean growth in southern Brazil

description: ABSTRACT Climate is a determining factor in agricultural production and climate change can affect this productivity. This, study aims to analyze the consequences of climatic change in the soil water dynamic and growth soybean in Southern Brazil. Scenarios were created for conditions of a 2 ºC temperature increase, a 20% reduction, and a 50% increase in precipitation rates, representing hot, dry and wet scenarios, respectively. The atmospheric forcing generated were used as input data for the agricultural version of the Integrated Biosphere Simulator model (Agro-IBIS) and simulations were carried out for a soybean growing season in the northwestern Rio Grande do Sul, Brazil. The following variables estimated by Agro-IBIS were analyzed: soil moisture, soybean leaf area index, evaporation, and transpiration. The results showed that the climatic changes projected by the simulations influence soybean growth in the study area. By increasing the temperature in 2 °C, the Agro-IBIS model indicated the occurrence of shorter crop growth cycles and even more impactful results on the leaf area index, with a 70% reduction in the highest values. Furthermore, a 50% increase in precipitation rate showed positive effects on agriculture, indicated by increased LAI in the reproductive period. On the other hand, a 20% reduction in precipitation has a negative effect, as it exposes the crop to water deficit conditions, impacting soil moisture and decreasing LAI. The soil evaporation is also intensified with increased temperatures due to the higher evaporative demand of the atmosphere and a significant decline in LAI. The transpiration for the hot scenario is more strongly impacted during the vegetative growth stage and leaf senescence.
DOI: 10.6084/m9.figshare.22268744
title: Soil organic matter in biogenic, intermediate and physicogenic aggregates under agroecological management

description: ABSTRACT Agroecological management can favor the improvement of soil attributes, especially soil organic matter (SOM) and soil aggregation. The objective of the study was to quantify the carbon contents of the humic and oxidizable fractions of SOM of aggregates from different origins from agroecological management systems. Five experimental areas located in the Integrated Agroecological Production System were evaluated: AFS – Agroforestry System; C-SUN – Coffee in full sun; C-SHA – Shaded coffee; AL-FLE – Cultivation in alleys of Flemingia macrophylla with green beans; and NT – No-tillage. The aggregates were separated, identified, and classified as to their origin or formation pathways into biogenic, intermediate, and physicogenic. The carbon contents of the humic fractions fulvic acid (C-FAF), humic acid (C-HAF) and humin (C-HUMF); and oxidizable fractions (F1 and F2, labile; and F3 and F4, recalcitrant) of SOM were determined. The greatest variations in the carbon values of the humic fractions were observed in the aggregates of the AFS, C-SUN and C-SHA systems. In relation to C-HUMF, the highest contents of this fraction were quantified in the biogenic and intermediate aggregates of the C-SUN, C-SHA and AL-FLE systems. The carbon contents of the oxidizable fractions of SOM showed variability between the management systems, mainly for the F1, F2 and F3 fractions in the aggregates under C-SUN and C-SHA. The C-SUN system showed a higher proportion of more humified and recalcitrant fractions of SOM when compared to the C-SHA system. The management practices maids in the agroecological systems of C-SHA, C-SUN and AFS promoted improvements in soil quality.
DOI: 10.6084/m9.figshare.22268744.v1
title: Soil organic matter in biogenic, intermediate and physicogenic aggregates under agroecological management

description: ABSTRACT Agroecological management can favor the improvement of soil attributes, especially soil organic matter (SOM) and soil aggregation. The objective of the study was to quantify the carbon contents of the humic and oxidizable fractions of SOM of aggregates from different origins from agroecological management systems. Five experimental areas located in the Integrated Agroecological Production System were evaluated: AFS – Agroforestry System; C-SUN – Coffee in full sun; C-SHA – Shaded coffee; AL-FLE – Cultivation in alleys of Flemingia macrophylla with green beans; and NT – No-tillage. The aggregates were separated, identified, and classified as to their origin or formation pathways into biogenic, intermediate, and physicogenic. The carbon contents of the humic fractions fulvic acid (C-FAF), humic acid (C-HAF) and humin (C-HUMF); and oxidizable fractions (F1 and F2, labile; and F3 and F4, recalcitrant) of SOM were determined. The greatest variations in the carbon values of the humic fractions were observed in the aggregates of the AFS, C-SUN and C-SHA systems. In relation to C-HUMF, the highest contents of this fraction were quantified in the biogenic and intermediate aggregates of the C-SUN, C-SHA and AL-FLE systems. The carbon contents of the oxidizable fractions of SOM showed variability between the management systems, mainly for the F1, F2 and F3 fractions in the aggregates under C-SUN and C-SHA. The C-SUN system showed a higher proportion of more humified and recalcitrant fractions of SOM when compared to the C-SHA system. The management practices maids in the agroecological systems of C-SHA, C-SUN and AFS promoted improvements in soil quality.
DOI: 10.6084/m9.figshare.22268747
title: Vigor and anaerobic metabolism of soybean seeds evaluated by ethanol test

description: Abstract: Among the vigor tests, ethanol is an alternative that provides desirable characteristics to be applied in seed-producing companies internal quality control planning. The aim was to evaluate the vigor of soybean seeds by the ethanol test and the fermentative metabolism after its application. A completely randomized experimental design with five replications was used, with treatments consisting of 10 lots of soybean seeds, except for the variables composing the fermentative metabolism, for which five lots of soybean seeds were used. First, the initial quality of the lots was assessed by evaluating water content, germination, seedling emergence, accelerated aging, tetrazolium test (vigor), electrical conductivity, and seed respiration. For the ethanol test, the seeds were subjected to soaking times of 30, 60, 90, and 120 minutes until the moment of reading, and subsequently, the fermentative metabolism was evaluated (lactate dehydrogenase - LDH, pyruvate decarboxylase - PDC, and alcohol dehydrogenase - ADH). The ethanol test in soybean seeds efficiently ranks lots into different levels of vigor, using the soaking time of 30 minutes, showing a moderate association between the electrical conductivity test and seed respiration. Furthermore, the activity of the enzymes LDH, PDC, and ADH proves that ethanol is produced during the soaking process of soybean seeds.
DOI: 10.6084/m9.figshare.22268747.v1
title: Vigor and anaerobic metabolism of soybean seeds evaluated by ethanol test

description: Abstract: Among the vigor tests, ethanol is an alternative that provides desirable characteristics to be applied in seed-producing companies internal quality control planning. The aim was to evaluate the vigor of soybean seeds by the ethanol test and the fermentative metabolism after its application. A completely randomized experimental design with five replications was used, with treatments consisting of 10 lots of soybean seeds, except for the variables composing the fermentative metabolism, for which five lots of soybean seeds were used. First, the initial quality of the lots was assessed by evaluating water content, germination, seedling emergence, accelerated aging, tetrazolium test (vigor), electrical conductivity, and seed respiration. For the ethanol test, the seeds were subjected to soaking times of 30, 60, 90, and 120 minutes until the moment of reading, and subsequently, the fermentative metabolism was evaluated (lactate dehydrogenase - LDH, pyruvate decarboxylase - PDC, and alcohol dehydrogenase - ADH). The ethanol test in soybean seeds efficiently ranks lots into different levels of vigor, using the soaking time of 30 minutes, showing a moderate association between the electrical conductivity test and seed respiration. Furthermore, the activity of the enzymes LDH, PDC, and ADH proves that ethanol is produced during the soaking process of soybean seeds.
DOI: 10.57760/sciencedb.j00196.00001
title: Characterization and genetic analysis of a new allelic mutant of Miniature1 gene in maize
title: 一个新的玉米Miniature1基因等位突变体的鉴定与遗传分析

description: Grain development is a key determinant for maize grain yield and quality, but the regulatory mechanisms have not been fully revealed. A maize mutant deficient in kernel development was found and selected in our field. The mutant exhibited an incomplete grain filling, reduced embryo and endosperm size, shriveled mature grains and empty pericarp. Genetic analysis suggested that the mutant phenotype was controlled by a single recessive nuclear gene. The candidate gene was preliminarily mapped to a 1.1 Mb interval on chromosome 2, and further study revealed that a hAT transposon was inserted into the first exon of Miniature1 (Mn1) gene, which resulted in a frame-shift mutation and down-regulated expression of Mn1. The transposon insertion was fully linked with the defective kernel phenotype of the mutant, which therefore was nominated mn1-m2. AllelismAllelic test of mn1-m2 and mn1-89 suggested that mn1-m2 was a new allelic mutant of Mn1 gene. This study characterized a new allelic mutant of Mn1 gene with different mutation site and type, which enriches the maize germplasm resources and provides genetic materials for regulatory mechanism analysis of Mn1 in kernel development.
description: Grain development is a key determinant for maize grain yield and quality, but the regulatory mechanisms have not been fully revealed. A maize mutant deficient in kernel development was found and selected in our field. The mutant exhibited an incomplete grain filling, reduced embryo and endosperm size, shriveled mature grains and empty pericarp. Genetic analysis suggested that the mutant phenotype was controlled by a single recessive nuclear gene. The candidate gene was preliminarily mapped to a 1.1 Mb interval on chromosome 2, and further study revealed that a hAT transposon was inserted into the first exon of Miniature1 (Mn1) gene, which resulted in a frame-shift mutation and down-regulated expression of Mn1. The transposon insertion was fully linked with the defective kernel phenotype of the mutant, which therefore was nominated mn1-m2. AllelismAllelic test of mn1-m2 and mn1-89 suggested that mn1-m2 was a new allelic mutant of Mn1 gene. This study characterized a new allelic mutant of Mn1 gene with different mutation site and type, which enriches the maize germplasm resources and provides genetic materials for regulatory mechanism analysis of Mn1 in kernel development.
DOI: 10.6084/m9.figshare.22268750
title: A New Spatial Model for Ecological Suitability Assessment of Irrigated Farming in Jahrom County, Iran

description: ABSTRACT Agricultural suitability assessment is a process that requires spatial data, geo-information tools, and the expertise of a computer scientist to analyze the information. The main objective of this paper is to propose a new model (based on Iranian ecological model and Food and Agriculture Organization (FAO) model) for ecological suitability evaluation with geometric mean evaluation and calibration methods for better planning management of irrigated lands. Next, to verify and compare the proposed method with other well-known existing, methods such as, Boolean logic and MCE (WLC) models were used. For testing these models, normalized difference vegetation index (NDVI) was used. Findings of this research showed that the proposed model by geo-mean and calibration (kappa=0.79) is the best among used methods. On the contrary, arithmetic mean method showed the lowest accuracy (kappa=0). So, these methods (geometric mean evaluation and calibration) have high flexibility in locating agricultural lands. Overall, this study can be used as a basic framework to evaluate ecological suitability for other regions with similar conditions because of its simplicity and high precision.
DOI: 10.6084/m9.figshare.22268750.v1
title: A New Spatial Model for Ecological Suitability Assessment of Irrigated Farming in Jahrom County, Iran

description: ABSTRACT Agricultural suitability assessment is a process that requires spatial data, geo-information tools, and the expertise of a computer scientist to analyze the information. The main objective of this paper is to propose a new model (based on Iranian ecological model and Food and Agriculture Organization (FAO) model) for ecological suitability evaluation with geometric mean evaluation and calibration methods for better planning management of irrigated lands. Next, to verify and compare the proposed method with other well-known existing, methods such as, Boolean logic and MCE (WLC) models were used. For testing these models, normalized difference vegetation index (NDVI) was used. Findings of this research showed that the proposed model by geo-mean and calibration (kappa=0.79) is the best among used methods. On the contrary, arithmetic mean method showed the lowest accuracy (kappa=0). So, these methods (geometric mean evaluation and calibration) have high flexibility in locating agricultural lands. Overall, this study can be used as a basic framework to evaluate ecological suitability for other regions with similar conditions because of its simplicity and high precision.
DOI: 10.6084/m9.figshare.22268753
title: Osmopriming with selenium: physical and physiological quality of tomato seeds in response to water deficit

description: Abstract: Tomato is a crop sensitive to water deficit and the responses of seeds to germination under these conditions involve biochemical, physiological, and molecular processes. The aim of this study was to evaluate the physical, physiological, and biochemical changes in tomato seeds osmoprimed with selenium (Se) and subjected to water deficit during germination. Tomato seeds of the LA 4050 and LA 3475 accessions were osmoprimed with PEG 6000 solution (-1.0 MPa) plus Na2SeO4 (12.5 μM) or only with PEG 6000 solution for 24 h or unprimed. The seeds from the different treatments were subjected to water deficit (-0.3 MPa) or to control (0 MPa). Image analyses were performed (X-ray), physiological variables were obtained by the germination test and activities of SOD, CAT and POX enzymes were determined. Osmopriming, especially with PEG, provided the seeds of both accessions with higher densities and gray mean when compared to unprimed ones. Seeds under water deficit showed lower physiological performance and lower enzymatic activity. Se did not induce seed resistance to water deficit. Osmopriming with PEG 6000 at -1.0 MPa is an efficient technique for improving the physiological quality of seeds of tomato accessions susceptible and tolerant to water deficit. Moreover, the antioxidant enzyme CAT proved to be an indicator of oxidative stress tolerance in tomato seedlings under water deficit.
DOI: 10.6084/m9.figshare.22268753.v1
title: Osmopriming with selenium: physical and physiological quality of tomato seeds in response to water deficit

description: Abstract: Tomato is a crop sensitive to water deficit and the responses of seeds to germination under these conditions involve biochemical, physiological, and molecular processes. The aim of this study was to evaluate the physical, physiological, and biochemical changes in tomato seeds osmoprimed with selenium (Se) and subjected to water deficit during germination. Tomato seeds of the LA 4050 and LA 3475 accessions were osmoprimed with PEG 6000 solution (-1.0 MPa) plus Na2SeO4 (12.5 μM) or only with PEG 6000 solution for 24 h or unprimed. The seeds from the different treatments were subjected to water deficit (-0.3 MPa) or to control (0 MPa). Image analyses were performed (X-ray), physiological variables were obtained by the germination test and activities of SOD, CAT and POX enzymes were determined. Osmopriming, especially with PEG, provided the seeds of both accessions with higher densities and gray mean when compared to unprimed ones. Seeds under water deficit showed lower physiological performance and lower enzymatic activity. Se did not induce seed resistance to water deficit. Osmopriming with PEG 6000 at -1.0 MPa is an efficient technique for improving the physiological quality of seeds of tomato accessions susceptible and tolerant to water deficit. Moreover, the antioxidant enzyme CAT proved to be an indicator of oxidative stress tolerance in tomato seedlings under water deficit.
DOI: 10.6084/m9.figshare.21587004
title: Determinants of non-suppression HIV Viral Load among Children Receiving Antiretroviral Therapy in Simiyu Region: A Cross-Sectional Study Dataset.

description: The introduction of antiretroviral therapy (ART) with increasing access to effective human immunodeficiency virus (HIV) prevention, diagnosis, treatment, and care, including opportunistic infections, has significantly changed the natural course of HIV infection in adults and children. Viral load suppression (VLS) is an essential parameter of a therapy’s effectiveness after ART initiation as a surrogate marker for disease progression. However, despite substantial ART coverage in individuals with HIV in Tanzania, VLS among HIV-positive children receiving ART remains intolerably low at 18%, indicating that 82% of those enrolled in care and treatment centers receiving ART did not achieve VLS. Therefore, this data was collected and analyzed to determine factors affecting VLS in children with HIV infection receiving ART. The findings of this study will help us fill the knowledge gap on factors contributing to low VLS among children with HIV infection in Tanzania. In this database, we found that age at ART initiation and medication adherence play a significant role in VLS. HIV/AIDS programs should incorporate intensive interventions targeting early ART initiation for children and intensifying treatment adherence.
DOI: 10.6084/m9.figshare.21587004.v3
title: Determinants of non-suppression HIV Viral Load among Children Receiving Antiretroviral Therapy in Simiyu Region: A Cross-Sectional Study Dataset.

description: The introduction of antiretroviral therapy (ART) with increasing access to effective human immunodeficiency virus (HIV) prevention, diagnosis, treatment, and care, including opportunistic infections, has significantly changed the natural course of HIV infection in adults and children. Viral load suppression (VLS) is an essential parameter of a therapy’s effectiveness after ART initiation as a surrogate marker for disease progression. However, despite substantial ART coverage in individuals with HIV in Tanzania, VLS among HIV-positive children receiving ART remains intolerably low at 18%, indicating that 82% of those enrolled in care and treatment centers receiving ART did not achieve VLS. Therefore, this data was collected and analyzed to determine factors affecting VLS in children with HIV infection receiving ART. The findings of this study will help us fill the knowledge gap on factors contributing to low VLS among children with HIV infection in Tanzania. In this database, we found that age at ART initiation and medication adherence play a significant role in VLS. HIV/AIDS programs should incorporate intensive interventions targeting early ART initiation for children and intensifying treatment adherence.
DOI: 10.6084/m9.figshare.21587004.v4
title: Determinants of non-suppression HIV Viral Load among Children Receiving Antiretroviral Therapy in Simiyu Region: A Cross-Sectional Study Dataset.

description: The introduction of antiretroviral therapy (ART) with increasing access to effective human immunodeficiency virus (HIV) prevention, diagnosis, treatment, and care, including opportunistic infections, has significantly changed the natural course of HIV infection in adults and children. Viral load suppression (VLS) is an essential parameter of a therapy’s effectiveness after ART initiation as a surrogate marker for disease progression. However, despite substantial ART coverage in individuals with HIV in Tanzania, VLS among HIV-positive children receiving ART remains intolerably low at 18%, indicating that 82% of those enrolled in care and treatment centers receiving ART did not achieve VLS. Therefore, this data was collected and analyzed to determine factors affecting VLS in children with HIV infection receiving ART. The findings of this study will help us fill the knowledge gap on factors contributing to low VLS among children with HIV infection in Tanzania. In this database, we found that age at ART initiation and medication adherence play a significant role in VLS. HIV/AIDS programs should incorporate intensive interventions targeting early ART initiation for children and intensifying treatment adherence.