MAY 2021最新文献_第2页

Plant biomass and fruit quality response of greenhouse tomato under varying irrigation level and water quality 不同灌溉水平和水质对温室番茄植株生物量和果实品质的响应

MAY 2021 Pub Date : 1900-01-01 DOI: 10.21475/ajcs.21.15.05.p3052

J. Chand, G. Hewa, A. Hassanli, B. Myers

{"title":"Plant biomass and fruit quality response of greenhouse tomato under varying irrigation level and water quality","authors":"J. Chand, G. Hewa, A. Hassanli, B. Myers","doi":"10.21475/ajcs.21.15.05.p3052","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.05.p3052","url":null,"abstract":"The impact of water quality with varying deficit irrigation level on the plant biomass and fruit quality parameters of greenhouse tomato (Lycopersicon esculentum L. cv Izmir) was investigated. A pot-based experiment was carried out over two growing seasons (2017-2018 and 2018-2019). Three water qualities: groundwater, recycled wastewater and an equal mix of both were applied in four irrigation scenarios which aimed to maintain soil moisture levels at 60%, 70%, 80% and 100% of field capacity. A surface drip irrigation system was designed maintaining irrigation frequency of two days. Results showed that both water quality and deficit irrigation significantly affected plant biomass. The fresh fruit weight was rather uniform, ranged from 53.2 to 85.4 gram and found highest in full irrigation. Most of the fruit quality parameters were not significantly affected by water quality.The significantly higher values of total soluble solid (7.87 degree brix), fruit firmness (9.28 kg/cm2), fruit pH (4.24) and vitamin C content (68.33 mg/kg) were measured in treatments maintaining soil moisture content at 60% of field capacity (most water-stressed conditions). Based on these findings, it recommended that by adopting deficit irrigation and maintaining soil moisture at 60% of field capacity, fruit quality parameters can be significantly improved. In contrast, fresh fruit weight and plant biomass were reduced.","PeriodicalId":371150,"journal":{"name":"MAY 2021","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114244279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural and functional stability of photosystem-II in Moringa oleifera under salt stress 盐胁迫下辣木光系统ⅱ的结构与功能稳定性

MAY 2021 Pub Date : 1900-01-01 DOI: 10.21475/ajcs.21.15.05.p2996

S. Bashir, Misbah Amir, F. Bashir, M. Javed, A. Hussain, S. Fatima, R. Parveen, Aneela Kanwal Shahzadi, Shehrooz Afzal, Shumaila Raza, Tooba Horain, A. Iqbal, Ayesha Pervaiz, A. Rehman, A. Ayyaz, Z. Zafar, H. Athar

{"title":"Structural and functional stability of photosystem-II in Moringa oleifera under salt stress","authors":"S. Bashir, Misbah Amir, F. Bashir, M. Javed, A. Hussain, S. Fatima, R. Parveen, Aneela Kanwal Shahzadi, Shehrooz Afzal, Shumaila Raza, Tooba Horain, A. Iqbal, Ayesha Pervaiz, A. Rehman, A. Ayyaz, Z. Zafar, H. Athar","doi":"10.21475/ajcs.21.15.05.p2996","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.05.p2996","url":null,"abstract":"The photosynthetic efficiency in plants is affected by salinity. Focus of this study was to observe the consequences of salinity on the rate of photosynthesis in Moringa (Moringa oleifera L.) plants. Experiment was conducted under field conditions with 3 replicates and data of treated and non-treated plants was collected accordingly. Photosynthetic rate was affected by different levels of salt stress. The change in photosynthetic was attributes were determined by OJIP and light response curve calculations by using Fluor Pen [FP 100-PS (Photon system, Czech Republic)] and DUAL-PAM-100 (Walz, Germany). Salinity stress decreased chlorophyll a fluorescence characteristic. The significant quantity of electron transport (φEo), quantum yield of primary photochemistry (φPo), proficiency per trapped excitation (Ψo) and performance index of photosystem II (PSII). Performance index (PIABS) was also declined with salinity in M. oleifera. Our results showed that electron transport rate and photosynthetic rate were inhibited by salinity in M. oleifera. However, in M. oleifera electron transport pathway of PSII was repressed and found varied in plants which are salt resistant. It was concluded that Y(I), ETR(I), Y(II), ETR(II), and Y(NA) were decreased by increasing salinity while NPQ, Y(ND), Y(NO) and Y(NPQ) increased in plants having resistance to salt stress","PeriodicalId":371150,"journal":{"name":"MAY 2021","volume":"54 15","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113943598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Production and characterization of lyophilized powder of yellow mombin (Spondias mombin L.) and umbu (Spondias tuberosa) 黄芒豆和绵豆冻干粉的制备及特性研究

MAY 2021 Pub Date : 1900-01-01 DOI: 10.21475/ajcs.21.15.05.p2971

Polyana Barbosa da Silva, F. D. Almeida, J. P. Gomes, S. D. N. Silva, A. J. Barroso, Joselito Sousa Moraes, Luzia Márcia de Melo Silva, J. D. S. Matos, L. P. F. R. D. Silva, B. A. Melo, C. Ramires

{"title":"Production and characterization of lyophilized powder of yellow mombin (Spondias mombin L.) and umbu (Spondias tuberosa)","authors":"Polyana Barbosa da Silva, F. D. Almeida, J. P. Gomes, S. D. N. Silva, A. J. Barroso, Joselito Sousa Moraes, Luzia Márcia de Melo Silva, J. D. S. Matos, L. P. F. R. D. Silva, B. A. Melo, C. Ramires","doi":"10.21475/ajcs.21.15.05.p2971","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.05.p2971","url":null,"abstract":"Yellow mombin and umbu are appreciable fruits with growing demand in the Northeast region of Brazil, used mainly in the form of pulps, juices, and ice cream, having great economic potential. Lyophilized products have high added value for maintaining a good part of their nutritional characteristics. The objective was to produce and characterize yellow mombin and umbu powders by lyophilization, using different concentrations of maltodextrin. The pulps were prepared in five formulations considering the addition of maltodextrin, with 0, 10, 20, 25 and 30% for yellow mombin and 0, 10, 15, 20, and 30% for umbu. Then they were frozen and lyophilized in a model L101 lyophilizer at a pressure at a final pressure of 170 mmHg and a temperature of (-50 ºC +/- 3 ºC). The physical-chemical characterization of the whole pulps and of the yellow mombin and umbu powders was carried out and were determined: water content (%), aw (water activity), protein (%), lipids (%), ash (%), ascorbic acid (mg of ascorbic acid.100g-1), SS (ºBrix), pH, titratable acidity (%), SS/AT ratio, color (L*, a * and b*), solubility (%) and hygroscopicity (%). Only in the formulation with 30% maltodextrin the water content of the powders was less than 5%, as recommended by the legislation for lyophilized fruits. The lower water activity (aw) was also obtained in this formulation, in addition to increased solubility and reduced hygroscopicity, which are factors that favor the quality and conservation of powders, which are more suitable for the production of food products","PeriodicalId":371150,"journal":{"name":"MAY 2021","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117306239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficiency and persistence of insecticides with different action mechanisms applied on wheat stored pest sitophilus zeamais 不同作用机制杀虫剂对小麦贮藏害虫玉米象虫的药效和持久性研究

MAY 2021 Pub Date : 1900-01-01 DOI: 10.21475/ajcs.21.15.05.p2387

D. A. Magano, I. Carvalho, Ana Paula Schwede Doberstein, Murilo Vieira Louro, V. Bubans, Lucas Drebes, J. Guedes, F. Lautenchleger, L. L. Ferreira, W. Boller

{"title":"Efficiency and persistence of insecticides with different action mechanisms applied on wheat stored pest sitophilus zeamais","authors":"D. A. Magano, I. Carvalho, Ana Paula Schwede Doberstein, Murilo Vieira Louro, V. Bubans, Lucas Drebes, J. Guedes, F. Lautenchleger, L. L. Ferreira, W. Boller","doi":"10.21475/ajcs.21.15.05.p2387","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.05.p2387","url":null,"abstract":"Sitophilus zeamais is the most important insect-plague among stored grain pests. The method of chemical control based on phosphine is the most used for its control, however, this method presents some inconveniences, being a costly method in labor and dangerous to the operators from the toxicological point of view. Thus, the use of preventive control, which consists of the application of liquid insecticides on the mass of grains, during the loading of the warehouse, appears as an alternative against the attack of the pests that tend to settle in the mass of grains. Thus, the objective of this work was to evaluate the efficiency and persistence of insecticides with different mechanisms of action on S. zeamais on stored wheat, simulating ideal storage conditions. An experiment was performed composed of the active ingredients: abamectin, spinosad, lambda-cyhalothrin + chlorantraniliprole, bifenthrin as a positive control, and the negative control was distilled water. The experimental design was a completely randomized block design with four replicates. The wheat was stored in Gerbox containing 250 grams, all samples being treated directly in these containers by spraying the liquid on the wheat grains. After spraying, the samples were homogenized and infested with 15 adult individuals of S. zeamais and deposited in an air conditioned room at 30 ± 1 °C and relative humidity of 30 ± 2%, in order to provide conditions of high biological activity of the insects. The active ingredients spinosad and abamectin promoted a 100% control of S. zeamais up to 120 days of conduction of this assay. Regarding biological persistence, the active ingredients lambda-cyhalothrin + chlorantraniliprole and bifenthrin had control effects up to 60 days after application while the active principles abamectin and spinosad persisted until the end of the bioassay observations","PeriodicalId":371150,"journal":{"name":"MAY 2021","volume":"68 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130055990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Selection of potato clones derived from seed tubers for nutritional efficiency to phosphorus 马铃薯块茎无性系对磷营养效率的选择

MAY 2021 Pub Date : 1900-01-01 DOI: 10.21475/ajcs.21.15.05.p2837

D. Sausen, I. Carvalho, Miriam da Silva Tavares, M. Schorr, R. Schwalbert, C. Tarouco, R. Mambrin, A. R. Marques, F. Lautenchleger, Fernando Teixeira Nicosolo

{"title":"Selection of potato clones derived from seed tubers for nutritional efficiency to phosphorus","authors":"D. Sausen, I. Carvalho, Miriam da Silva Tavares, M. Schorr, R. Schwalbert, C. Tarouco, R. Mambrin, A. R. Marques, F. Lautenchleger, Fernando Teixeira Nicosolo","doi":"10.21475/ajcs.21.15.05.p2837","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.05.p2837","url":null,"abstract":"To develop agricultural systems that produce more food with limited availability of phosphorus (P) it is necessary to explore the genetic variability of plants and select potato clones that are more efficient at P use. The objective of this study was to evaluate the performance of four potato clones for P nutritional efficiency in closed off-soil growing system using native soil as substrate. Therefore, seed tubers from the four potato clones (Asterix, Atlantic, SMIC 148-A and SMINIA 793101-3) were planted in plastic pots with native soil as a substrate, where the treatments consisted of two levels of P (0.025 and 0.11g kg-1 KH2PO4). 52 days after planting, the concentration of P in the shoot, the shoot and the total dry mass, the rooting efficiency, P absorption, P translocation and use of P were evaluated. SMIC 148 -A is the clone that most concentrates P in the shoot and that produces more total dry mass under low P, while SMINIA 793101-3 is the most efficient clone in the absorption and translocation of P under low nutrient level, however, the Asterix and Atlantic clones showed greater efficiency in the use of P","PeriodicalId":371150,"journal":{"name":"MAY 2021","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128318806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evaluation of the sole and integrated application of nano-graphene oxide, zeolite, and chitosan on gas exchanges and silymarin content of milk thistle (Silybum marianum L.) under salinity stress 盐胁迫下纳米氧化石墨烯、沸石和壳聚糖对水飞蓟气体交换和水飞蓟素含量的影响

MAY 2021 Pub Date : 1900-01-01 DOI: 10.21475/ajcs.21.15.05.p3131

Sara Safikhan, M. Chaichi

{"title":"Evaluation of the sole and integrated application of nano-graphene oxide, zeolite, and chitosan on gas exchanges and silymarin content of milk thistle (Silybum marianum L.) under salinity stress","authors":"Sara Safikhan, M. Chaichi","doi":"10.21475/ajcs.21.15.05.p3131","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.05.p3131","url":null,"abstract":"Identifying environmental factors, plant characteristics, and agronomic activities plays an essential role in medicinal plant production. Milk thistle (Silybum marianum L.) is a well-known medicinal plant with extensive use in diverse liver diseases and is economically a significant crop. This research was conducted to evaluate the effect of the sole and integrated applications of graphene oxide (GO), zeolite, and chitosan as modifying materials on gas exchange and the secondary metabolites of milk thistle under severe salinity stress. Seven sole and integrated combinations of nano-materials comprised of T1, T2, T3, T4, T5, T6, T7, and control (T8, no nano-materials application) and two levels of saline water (12 ds/m) and tap water (control, 0.8 ds/m) were applied to the soil of experimental plots based on a factorial design with three replications. The results showed that the highest photosynthesis rate was obtained with T7 treatment for both water treatments. The highest plant silymarin concentration was obtained from the T6 treatment under both saline and tap water conditions. This treatment increased the silymarin concentration by 15.9% compared to the T8. The highest plant silymarin yield (180 mg per plant) was recorded for the T7 under tap water (control) condition, and 130.3 mg/plant for T6 under salinity stress, respectively. The Transmission Electron Microscope technology indicated that GO at low concentration (0.01%) could be safely used to enhance milk thistle germination and growth under severe salinity stress conditions","PeriodicalId":371150,"journal":{"name":"MAY 2021","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126992486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Anatomical and physiological characteristics of leaves from Eugenia dysenterica DC. can predict nutritional deficiency symptoms 赤霉素(Eugenia dysenterica DC)叶片解剖生理特征。能预测营养缺乏症状吗

MAY 2021 Pub Date : 1900-01-01 DOI: 10.21475/ajcs.21.15.05.p3003

L. A. Bessa, L. Vitorino, F. G. Silva, S. C. V. Filho

{"title":"Anatomical and physiological characteristics of leaves from Eugenia dysenterica DC. can predict nutritional deficiency symptoms","authors":"L. A. Bessa, L. Vitorino, F. G. Silva, S. C. V. Filho","doi":"10.21475/ajcs.21.15.05.p3003","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.05.p3003","url":null,"abstract":"Plants receiving insufficient concentrations of the different essential nutrients may respond symptomatically to this stress. However, when the first visible symptoms of nutritional deficiency appear, plants already exhibit significant changes in their structure. As seedlings of E. dysenterica are important for the recovery of degraded areas and as the fruits of this species are widely exploited commercially, we decided to evaluate whether the omission of nutrients may affect the leaf anatomical ultrastructure, dry matter production and the synthesis of photosynthetic pigments in this plant, in an attempt to use data of this nature to predict symptoms of nutritional deficiency in seedlings of this species. For this purpose, we grow seedlings in a hydroponic system, offering all nutrients and also omitting each nutrient individually. Thus, we evaluated the effect of the omission of each nutrient on the anatomical leaf structure, dry mass production and the synthesis of photosynthetic pigments. Seedlings that grew in the absence of Ca and Mn exhibited compromised spongy parenchyma and mesophyll development, while the omission of K and Mg increased the number of epidermal cells and stomata. Low dry mass production in E. dysenterica was related to the omission of S and Mn, while P, N and Fe deficiencies directly affected the synthesis of pigments. Thus, leaf anatomical and physiological data can predict nutritional deficiency conditions, enabling the user to diagnose the deficiency before the onset of symptoms in E. dysenterica seedlings. Our results may help investigators to understand the effects of nutritional omissions on other native Cerrado plants","PeriodicalId":371150,"journal":{"name":"MAY 2021","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116174089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intermediate resistance to nematode Meloidogyne paranaensis in Híbrido de Timor coffee genotypes Híbrido de Timor咖啡基因型对双曲线虫的中间抗性

MAY 2021 Pub Date : 1900-01-01 DOI: 10.21475/ajcs.21.15.05.p2742

G. H. Sera, L. E. Fernandes, I. Fonseca, D. S. Ito, L. Shigueoka, Valdir Mariucci Junior, Kawana Silva Bortolato, A. A. Pereira

{"title":"Intermediate resistance to nematode Meloidogyne paranaensis in Híbrido de Timor coffee genotypes","authors":"G. H. Sera, L. E. Fernandes, I. Fonseca, D. S. Ito, L. Shigueoka, Valdir Mariucci Junior, Kawana Silva Bortolato, A. A. Pereira","doi":"10.21475/ajcs.21.15.05.p2742","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.05.p2742","url":null,"abstract":"The aim of this study was to prove that Híbrido de Timor (HdT) accessions are resistance sources to Meloidogyne paranaensis. Two experiments were carried out in a greenhouse at IDR-Paraná (Londrina, Paraná State, Brazil). Open pollinated fruits were harvested from 10 accessions (HdT UFV 380-05, HdT UFV 408-10, HdT UFV 408-11, HdT UFV 408-28, HdT UFV 428-04, HdT UFV 439-14, HdT UFV 443-08, HdT UFV 445-70, HdT UFV 446-138, HdT UFV 448-75) from the EPAMIG/ UFV germplasm bank. Seeds of these accessions were sown to obtain seedlings to test the resistance to M. paranaensis. For each experiment, a completely randomized design was used with 11 treatments, eight replications and one plant per plot. Cultivar Mundo Novo IAC 376-4 was the susceptible check. Seedlings with three to four pairs of leaves were transplanted into plastic cups with a capacity of 700 mL and 1200 eggs. The J2 of M. paranaensis (IP) were inoculated after one month. The assessments were performed 134 days after inoculation, when the data of the number of eggs and J2 per gram of roots and the final population of nematodes (FP) were obtained. The reproduction factor (RF) was calculated using the formula: RF = IP / FP. To classify the resistance levels of the genotypes, the reproduction factor reduction (RFR) was used. It classified the levels from highly resistant to highly susceptible. Different levels of intermediate resistance between the accesses were observed, highlighting HdT UFV 408-28 that presented moderate resistance to M. paranaensis. HdT UFV 408-28 showed a high percentage of plants with intermediate resistance, which can be used in breeding programs aimed at resistance to M. paranaensis","PeriodicalId":371150,"journal":{"name":"MAY 2021","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126003710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pollen morphology of Malvaceae genera from Saudi Arabia and its taxonomic significance 沙特阿拉伯锦葵科属花粉形态及其分类意义

MAY 2021 Pub Date : 1900-01-01 DOI: 10.21475/ajcs.21.15.05.p3129

K. A. Khalik, Suad Al- Ruzayza, A. Assiri, Ahmed Elkordy

{"title":"Pollen morphology of Malvaceae genera from Saudi Arabia and its taxonomic significance","authors":"K. A. Khalik, Suad Al- Ruzayza, A. Assiri, Ahmed Elkordy","doi":"10.21475/ajcs.21.15.05.p3129","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.05.p3129","url":null,"abstract":"Pollen morphology of 20 species belong to seven genera (Abutilon, Althaea, Hibiscus, Malva, Pavonia, Senra and Sida) of Malvaceae from Saudi Arabia were studied by using light microscope (LM) and scanning electron microscope (SEM). Quantitative and qualitative pollen morphological characters which vary among investigated taxa are found in the pollen polarity, symmetry, size, shape, polar axis, equatorial diameter, P/E ratio, average height and width of spine, aperature character and spine index. The pollen grains vary from spheroidal, prolate spheroidal, oblate spheroidal to suboblate. All taxa were characterized by relatively large to medium sized pollen grains, numerous pores scattered irregularly all over the grain, and echinate sculpturing. Sida ovata is the largest size pollen grain (138.95) µm. On the other hand, Malva parviflora showed the smallest pollen size (52.28 µm). The average height and width of spine varied greatly among studied taxa. The highest spines (20.65µm) found in Sida ovata, while the shortest (3.19 µm) was found in Abutilon pannosum. Results of the pollen shape, size, and exine sculpture characters offered useful data for evaluating the taxonomy of Malvaceae both on subgeneric and sectional levels. A key for the identification of the investigated taxa based on pollen grains characters is also provided","PeriodicalId":371150,"journal":{"name":"MAY 2021","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127202749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kenaf (Hibiscus cannabinus L.) as a remedy to oxisol contaminated with different mercury (Hg2+) concentrations 红麻(Hibiscus cannabinus L.)对不同浓度汞(Hg2+)污染的草甘膦的补救作用

MAY 2021 Pub Date : 1900-01-01 DOI: 10.21475/ajcs.21.15.05.p3194

L. Lavezzo, D. Delarica, A. Fostier, E. Rigobelo, Roberta Souto Carlos, Camila Chioda de Almeida, Danilo Olandino Souza, W. J. Melo

{"title":"Kenaf (Hibiscus cannabinus L.) as a remedy to oxisol contaminated with different mercury (Hg2+) concentrations","authors":"L. Lavezzo, D. Delarica, A. Fostier, E. Rigobelo, Roberta Souto Carlos, Camila Chioda de Almeida, Danilo Olandino Souza, W. J. Melo","doi":"10.21475/ajcs.21.15.05.p3194","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.05.p3194","url":null,"abstract":"We evaluated Hibiscus cannabinus (kenaf) to remedy oxisol contaminated with Hg2 + potential. The study was conducted in a controlled environment in pots with soil contaminated with HgCl2 solution, in a completely randomized design with 4 treatments: control (without Hg2+) and treatments with 5, 24 and 36 mg Hg2+ kg-1 of soil and 5 replicates / treatment. The quantification of total Hg in plant and soil samples was performed by atomic absorption spectrometry. Kenaf grown in contaminated pots did not show visual symptoms of toxicity. Plant height did not differ among treatments, but the dry shoot phytomass was 21.65% higher in control than the average of treatments with Hg. Treatment with 24 mg kg-1 showed dry root phytomass greater than control and the others. In general, oxisol was responsible for retaining greater amount of Hg than plants. Hg accumulated in greater proportion in roots than in shoots. In pots that received 36 mg kg-1, plants accumulated average of 2.57 mg kg-1 of Hg / pot, differing from the other treatments and the Hg transfer factor (TF) in plants was also calculated as the ratio of the concentration in shoots and in roots. The values were as follows: 3.11 for T1, 1.26 for T2, 0.05 for T3 and 0.02 for T4. Treatments showed no difference between T3 and T4 and TF decreased with increasing Hg dose. It could be concluded that Hg was more adsorbed by oxisol than by plants. Plants showed resistance to different soil Hg concentrations and can be considered as potential Hg2+ stabilizer","PeriodicalId":371150,"journal":{"name":"MAY 2021","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116253952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1