cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7515248.v1
title: Moisture desorption isotherms of cucumber seeds: modeling and thermodynamic properties

description: Hygroscopic equilibrium curves or sorption isotherms are important in order to define dehydration limits of the product, estimate moisture content alterations under environment conditions and to acquire moisture content values for safe storage. This work aimed to determine desorption isotherms of cucumber seeds stored at different temperature (10, 20, 30, 40 and 50 ºC) and relative humidity (0.11 to 0.96) and the thermodynamic properties of this process. Mathematical models were fitted to experimental data in order to represent the agricultural products hygroscopicity. Net isosteric heat of desorption was performed based on the Clausius-Clapeyron thermodynamic relation and Gibbs free energy through the Van't Hoff equation. Based on statistical parameters, Modified Henderson model was the one that best represented hygroscopicity of cucumber seeds. Equilibrium moisture content of cucumber seeds decreased with temperature increment at a constant value of relative humidity. Differential enthalpy values, representing the energy required to remove moisture from the cucumber seeds, ranged from 2923 to 2469 kJ. kg-1. Values of differential entropy and Gibbs free energy decreased with moisture content increase. Enthalpy-entropy compensation theory is valid for the sorption of cucumber seeds, in which the water sorption mechanism in cucumber seeds can be considered to be enthalpy controlled.
DOI: 10.6084/m9.figshare.7507727
title: Controlled deterioration test for evaluation of sunn hemp seed vigor

description: The controlled deterioration test is efficient for seed vigor evaluation of several species. However, the procedures conditions are incipient, especially in respect to tropical forages such as sunn hemp, which still does not have a standardized procedure. The objective of this research was to adjust the procedures for a controlled deterioration test in Crotalaria juncea L. seeds. For this, five commercial seed lots were evaluated for water content and initial physiological potential (germination test, first germination count, germination speed index, saturated salt accelerated aging with NaCl, electrical conductivity and seedling field emergence). For controlled deterioration test, the initial seed moisture content was adjusted to 18, 21 and 24% and, subsequently, the samples were exposed at 45 °C during 24 hours. Seed germination test was conducted with the use of sand as substrate. Evaluations were performed on the fourth, fifth and sixth day after sowing. The controlled deterioration test for sunn hemp seeds should be performed with 24% seed moisture content, at 45 °C during 24 hours, and the test evaluation on the fourth day after sowing.
DOI: 10.6084/m9.figshare.7507727.v1
title: Controlled deterioration test for evaluation of sunn hemp seed vigor

description: The controlled deterioration test is efficient for seed vigor evaluation of several species. However, the procedures conditions are incipient, especially in respect to tropical forages such as sunn hemp, which still does not have a standardized procedure. The objective of this research was to adjust the procedures for a controlled deterioration test in Crotalaria juncea L. seeds. For this, five commercial seed lots were evaluated for water content and initial physiological potential (germination test, first germination count, germination speed index, saturated salt accelerated aging with NaCl, electrical conductivity and seedling field emergence). For controlled deterioration test, the initial seed moisture content was adjusted to 18, 21 and 24% and, subsequently, the samples were exposed at 45 °C during 24 hours. Seed germination test was conducted with the use of sand as substrate. Evaluations were performed on the fourth, fifth and sixth day after sowing. The controlled deterioration test for sunn hemp seeds should be performed with 24% seed moisture content, at 45 °C during 24 hours, and the test evaluation on the fourth day after sowing.
DOI: 10.6084/m9.figshare.7509812
title: Action of nitric oxide in sesame seeds (Sesamum indicum L.) submitted to stress by cadmium

description: Abstract: The objective of this paper was to evaluate the effect of nitric oxide (NO) as a protecting agent of sesame seeds submitted to different concentrations of cadmium. The treatments were: water (control), water increased by sodium nitroprusside (SNP) and other treatments regarding the concentrations of cadmium increased by SNP. The following determinations were done: germination, first count of germination, germination speed index, length of hypocotyl and radicle and dry matter of hypocotyl and radicle, besides quantification of enzyme activities, superoxide dismutase, catalase, ascorbate peroxidase and total peroxidases. The statistical design was entirely randomized with five replicates. The data was submitted to a variance analysis and the averages obtained for the treatments were compared by the Tukey test at 5% significance. The averages obtained in the treatments with and without SNP were compared by the F test at 5% probability. The NO due to the application of SNP was beneficial, providing an increase in germination, vigor and growth of seedlings. There was a progressive increase of the antioxidant enzymes activity in the period of 0 to 24 hours, showing an organization of the antioxidant system in the sesame seeds throughout germination time.
DOI: 10.6084/m9.figshare.7509812.v1
title: Action of nitric oxide in sesame seeds (Sesamum indicum L.) submitted to stress by cadmium

description: Abstract: The objective of this paper was to evaluate the effect of nitric oxide (NO) as a protecting agent of sesame seeds submitted to different concentrations of cadmium. The treatments were: water (control), water increased by sodium nitroprusside (SNP) and other treatments regarding the concentrations of cadmium increased by SNP. The following determinations were done: germination, first count of germination, germination speed index, length of hypocotyl and radicle and dry matter of hypocotyl and radicle, besides quantification of enzyme activities, superoxide dismutase, catalase, ascorbate peroxidase and total peroxidases. The statistical design was entirely randomized with five replicates. The data was submitted to a variance analysis and the averages obtained for the treatments were compared by the Tukey test at 5% significance. The averages obtained in the treatments with and without SNP were compared by the F test at 5% probability. The NO due to the application of SNP was beneficial, providing an increase in germination, vigor and growth of seedlings. There was a progressive increase of the antioxidant enzymes activity in the period of 0 to 24 hours, showing an organization of the antioxidant system in the sesame seeds throughout germination time.
DOI: 10.6084/m9.figshare.7516214
title: Nodulation, Growth and Soybean Yield in Response to Seed Coating and Split Application of Phosphorus

description: Abstract: Phosphorus is one of the most important nutrients for soybeans, but it presents a complex dynamic in the soil and can become unavailable. The split and localized application of this nutrient can be an effective approach to increase its availability. The aim of this study was to evaluate the effect of a split phosphorus dose applied to the soil and the seed coating with monobasic sodium phosphate on nodulation, growth and yield components of soybean cultivar BRS Valiosa RR. The experiment was conducted in a greenhouse in a completely randomized design in a 2x5x3 factorial arrangement, i.e., coating or not the seeds; five doses of phosphorus applied to the soil; and three times of splitting phosphate fertilizer. Phosphorus content in the index leaf (IL), dry matter of shoots, roots and nodules, yield components, and plant height were evaluated. There was an increase in nodulation and growth of plants with increased levels of phosphorus applied to the soil. In smaller doses, the seed coating and the splitting of phosphorus fertilizer increased nodulation, growth and yield components of plants. Thus, the splitting of the phosphorus dose, combined with seed coating, is indicated for increasing the yield components of soybean plants.
DOI: 10.6084/m9.figshare.7516214.v1
title: Nodulation, Growth and Soybean Yield in Response to Seed Coating and Split Application of Phosphorus

description: Abstract: Phosphorus is one of the most important nutrients for soybeans, but it presents a complex dynamic in the soil and can become unavailable. The split and localized application of this nutrient can be an effective approach to increase its availability. The aim of this study was to evaluate the effect of a split phosphorus dose applied to the soil and the seed coating with monobasic sodium phosphate on nodulation, growth and yield components of soybean cultivar BRS Valiosa RR. The experiment was conducted in a greenhouse in a completely randomized design in a 2x5x3 factorial arrangement, i.e., coating or not the seeds; five doses of phosphorus applied to the soil; and three times of splitting phosphate fertilizer. Phosphorus content in the index leaf (IL), dry matter of shoots, roots and nodules, yield components, and plant height were evaluated. There was an increase in nodulation and growth of plants with increased levels of phosphorus applied to the soil. In smaller doses, the seed coating and the splitting of phosphorus fertilizer increased nodulation, growth and yield components of plants. Thus, the splitting of the phosphorus dose, combined with seed coating, is indicated for increasing the yield components of soybean plants.
DOI: 10.6084/m9.figshare.7510238
title: Physiological changes in Jatropha curcas L. seeds during storage

description: Abstract: Oil seeds, such as J. curcas, are more prone to deterioration and consequently to loss of quality during storage. In this context, adequate technics for its preservation are of great importance. This study aimed to evaluate the effects of different environments and packaging for the conservation of J. curcas seeds during twelve months of storage. The seeds were placed in three different types of packaging: a multiwall paper bag (or Kraft paper bag); a cloth bag; and a high-density plastic bag. After this, the seeds were stored in three different conditions: a laboratory (23 ± 3 ºC; 64 ± 11% of RH); a refrigerated room (20 ± 2 oC; 55 ± 5% of RH) and a cold chamber (10 ± 2 oC; 55 ± 5% of RH). Initially and thereafter every three months, the physiological qualities (germination and vigor) of the seeds were evaluated. J. curcas seeds packed in the plastic bags and stored in a cold chamber maintained their germination potential during twelve months. There was a decline in the physiological quality of the seeds stored in the laboratory conditions, independent of the packaging used. It was concluded that the most suitable condition for the storage of J. curcas seeds was packing them in plastic bags, placed in a cold chamber (10 ± 2 oC; 55 ± 5% of RH).
DOI: 10.6084/m9.figshare.7510238.v1
title: Physiological changes in Jatropha curcas L. seeds during storage

description: Abstract: Oil seeds, such as J. curcas, are more prone to deterioration and consequently to loss of quality during storage. In this context, adequate technics for its preservation are of great importance. This study aimed to evaluate the effects of different environments and packaging for the conservation of J. curcas seeds during twelve months of storage. The seeds were placed in three different types of packaging: a multiwall paper bag (or Kraft paper bag); a cloth bag; and a high-density plastic bag. After this, the seeds were stored in three different conditions: a laboratory (23 ± 3 ºC; 64 ± 11% of RH); a refrigerated room (20 ± 2 oC; 55 ± 5% of RH) and a cold chamber (10 ± 2 oC; 55 ± 5% of RH). Initially and thereafter every three months, the physiological qualities (germination and vigor) of the seeds were evaluated. J. curcas seeds packed in the plastic bags and stored in a cold chamber maintained their germination potential during twelve months. There was a decline in the physiological quality of the seeds stored in the laboratory conditions, independent of the packaging used. It was concluded that the most suitable condition for the storage of J. curcas seeds was packing them in plastic bags, placed in a cold chamber (10 ± 2 oC; 55 ± 5% of RH).
DOI: 10.6084/m9.figshare.7519316
title: Brachiaria decumbens intraspecific hybrids: characterization and selection for seed production

description: Abstract: Brachiaria decumbens has great importance in the national beef cattle scenario due to its high forage yield potential and high adaptability to acid soils and low fertility. In order to obtain new cultivars, intraspecific hybrids, previously selected by the Brachiaria breeding program, were evaluated in 2013 and 2014 for phenological characteristics and seed production potential through their production components, aiming to obtain cultivars with satisfactory production agronomic characteristics and forage yield, resistant to 'cigarrinhas-das-pastagens'(Tomaspia sp.) and good seed production. Estimates of phenotypic correlation and analysis of variance were performed using the SAS 9.3 software. From the results obtained in both consecutive years, it was observed that there was a correlation between the reproductive tiller number (RT) and the pure seeds (PS) weight in the seedbeds of the second year of production around 70% (p &lt; 0.01), which can be considered as a parameter to estimate the production of pure seeds before the start of flowering.
DOI: 10.6084/m9.figshare.7519316.v1
title: Brachiaria decumbens intraspecific hybrids: characterization and selection for seed production

description: Abstract: Brachiaria decumbens has great importance in the national beef cattle scenario due to its high forage yield potential and high adaptability to acid soils and low fertility. In order to obtain new cultivars, intraspecific hybrids, previously selected by the Brachiaria breeding program, were evaluated in 2013 and 2014 for phenological characteristics and seed production potential through their production components, aiming to obtain cultivars with satisfactory production agronomic characteristics and forage yield, resistant to 'cigarrinhas-das-pastagens'(Tomaspia sp.) and good seed production. Estimates of phenotypic correlation and analysis of variance were performed using the SAS 9.3 software. From the results obtained in both consecutive years, it was observed that there was a correlation between the reproductive tiller number (RT) and the pure seeds (PS) weight in the seedbeds of the second year of production around 70% (p &lt; 0.01), which can be considered as a parameter to estimate the production of pure seeds before the start of flowering.
DOI: 10.6084/m9.figshare.7509011
title: Physiological maturity of seeds and colorimetry of the fruits of Allophylus edulis [(A. St.-Hil., A. Juss. & Cambess.) Hieron. ex Niederl.]

description: Abstract This study aimed to determine the physiological maturity of A. edulis seeds, check if this is achieved in the same maturation stage, regardless of the collection region and, colorimetry of the fruit can be indicative of the time of harvest. Fruits were harvested in three counties of the western region of Paraná and visually classified into five ripening stages according to the color of the pericarp with the help of a digital colorimeter. Analyzed seed variables included morphological characteristics, germination and vigor. The experiment was conducted in a completely randomized design with four replications. The maximum dry matter accumulation of seeds was reached when the fruits reached the color orange. With the advance of the ripening process, red color fruits had seeds with lesser moisture content, coinciding with the maximum germination percentage and speed, besides generating seedlings with larger size and biomass accumulation. The green spectrum allowed to discriminate maturity from different places of harvest. A. edulis seeds with physiological maturity should be harvested when fruits present the red color, independent of the harvesting region or, with reflectance values between 28.0 and 49.2 nm in the green range of the color spectrum.
DOI: 10.6084/m9.figshare.7509011.v1
title: Physiological maturity of seeds and colorimetry of the fruits of Allophylus edulis [(A. St.-Hil., A. Juss. & Cambess.) Hieron. ex Niederl.]

description: Abstract This study aimed to determine the physiological maturity of A. edulis seeds, check if this is achieved in the same maturation stage, regardless of the collection region and, colorimetry of the fruit can be indicative of the time of harvest. Fruits were harvested in three counties of the western region of Paraná and visually classified into five ripening stages according to the color of the pericarp with the help of a digital colorimeter. Analyzed seed variables included morphological characteristics, germination and vigor. The experiment was conducted in a completely randomized design with four replications. The maximum dry matter accumulation of seeds was reached when the fruits reached the color orange. With the advance of the ripening process, red color fruits had seeds with lesser moisture content, coinciding with the maximum germination percentage and speed, besides generating seedlings with larger size and biomass accumulation. The green spectrum allowed to discriminate maturity from different places of harvest. A. edulis seeds with physiological maturity should be harvested when fruits present the red color, independent of the harvesting region or, with reflectance values between 28.0 and 49.2 nm in the green range of the color spectrum.
DOI: 10.6084/m9.figshare.7508381.v1
title: Maintenance of quality of Dalbergia nigra Vell. all. ex. Benth seeds during storage by sodium nitroprusside

description: Abstract: Nitric oxide (NO) is a compound that participates in vegetable physiologic processes. The purpose of this study was to investigate the efficiency of sodium nitroprusside (SNP), a NO donor, on the physiologic and biochemical responses of Dalbergia nigra (bahia rosewood) seeds under storage in different environmental conditions. Seeds recently collected were stored in cold chamber (5 ºC and 60% relative humidity, RH) or in two desiccators at 20 ºC: 55 and 93% RH for four months. Every month of storage seed samples were taken and imbibed in SNP solution at 10-4M concentration for 48 hours or in water. The germination percentage, electric conductivity, lipid peroxidation and catalase enzyme activity were evaluated. Seeds of bahia rosewood stored in cold chamber at 55% RH maintained physiologic quality, while seeds imbibed in SNP reduced the membrane permeability, decreasing lipid peroxidation and increasing catalase activity. Seeds kept under 93% RH deteriorated quickly, and SNP was not efficient in revert the seed degradation. It was concluded that nitric oxide maintain the quality of seeds stored in cold chamber and at 20 ºC and 55% RH, by maintaining membrane integrity and stimulating catalase activity.
DOI: 10.6084/m9.figshare.7516685
title: Biochemical changes in fiber naturally colored cottonseeds during storage

description: Abstract: The cotton seeds deterioration process with different chemical composition, in distinct environments is essential to the definition of adequate methods for storage. The deterioration involves cellular, metabolic and chemical changes and the behavior of the seeds' antioxidant defense system has an important role to control the speed and intensity of this process. The colored fiber of cottonseeds cv. BRS Verde and white fiber cv. BRS 187-8H were stored under controlled environment conditions (10 °C, 25 °C and 30 °C) for one year. The seeds were assessed for physiological quality, presence of microorganisms, chemical composition, oil and tocopherol contents by 90 day intervals. The cottonseed physiological potential began to decrease on day 90 particularly when the storage is carried out at 25 to 30 °C. Changes in lipid content and tocopherol are associated with the reduction of physiological quality. At temperatures above 25 °C the deterioration of cottonseeds is improved and decreases their physiological quality. Reduction in fat content and tocopherol and an increase in acidity and peroxide indicate loss of quality during storage.
DOI: 10.6084/m9.figshare.7516685.v1
title: Biochemical changes in fiber naturally colored cottonseeds during storage

description: Abstract: The cotton seeds deterioration process with different chemical composition, in distinct environments is essential to the definition of adequate methods for storage. The deterioration involves cellular, metabolic and chemical changes and the behavior of the seeds' antioxidant defense system has an important role to control the speed and intensity of this process. The colored fiber of cottonseeds cv. BRS Verde and white fiber cv. BRS 187-8H were stored under controlled environment conditions (10 °C, 25 °C and 30 °C) for one year. The seeds were assessed for physiological quality, presence of microorganisms, chemical composition, oil and tocopherol contents by 90 day intervals. The cottonseed physiological potential began to decrease on day 90 particularly when the storage is carried out at 25 to 30 °C. Changes in lipid content and tocopherol are associated with the reduction of physiological quality. At temperatures above 25 °C the deterioration of cottonseeds is improved and decreases their physiological quality. Reduction in fat content and tocopherol and an increase in acidity and peroxide indicate loss of quality during storage.
DOI: 10.6084/m9.figshare.7508381
title: Maintenance of quality of Dalbergia nigra Vell. all. ex. Benth seeds during storage by sodium nitroprusside

description: Abstract: Nitric oxide (NO) is a compound that participates in vegetable physiologic processes. The purpose of this study was to investigate the efficiency of sodium nitroprusside (SNP), a NO donor, on the physiologic and biochemical responses of Dalbergia nigra (bahia rosewood) seeds under storage in different environmental conditions. Seeds recently collected were stored in cold chamber (5 ºC and 60% relative humidity, RH) or in two desiccators at 20 ºC: 55 and 93% RH for four months. Every month of storage seed samples were taken and imbibed in SNP solution at 10-4M concentration for 48 hours or in water. The germination percentage, electric conductivity, lipid peroxidation and catalase enzyme activity were evaluated. Seeds of bahia rosewood stored in cold chamber at 55% RH maintained physiologic quality, while seeds imbibed in SNP reduced the membrane permeability, decreasing lipid peroxidation and increasing catalase activity. Seeds kept under 93% RH deteriorated quickly, and SNP was not efficient in revert the seed degradation. It was concluded that nitric oxide maintain the quality of seeds stored in cold chamber and at 20 ºC and 55% RH, by maintaining membrane integrity and stimulating catalase activity.