scholarly journals Pollination and quality of seeds and plantlets of Eugenia uniflora L.

Hoehnea ◽  
2019 ◽  
Vol 46 (1) ◽  
Author(s):  
Adriana de Oliveira Fidalgo ◽  
Aline Testoni Cécel ◽  
Juliana Ferrari de Oliveira Mazzi ◽  
Claudio José Barbedo
Keyword(s):  
Pollen Limitation ◽  
Dry Mass ◽  
Regenerative Capacity ◽  
Eugenia Uniflora ◽  
Cross Pollination ◽  
Pollination Control ◽  
Floral Visitors ◽  
Number Of Leaves ◽  
Natural Pollination

ABSTRACT This work evaluated the effect of pollination on the quality of seeds and plantlets of Eugenia uniflora L., as well as on the regenerative capacity of the seeds. Twelve individuals were monitored for their phenology and their floral visitors. Recently-opened flowers were subjected to self-pollination (SP), cross-pollination (CP) and natural pollination/control (C) treatments. The seeds obtained were evaluated for their germination and the resulting seedlings were transferred to a greenhouse and evaluated for their height, stem diameter, number of leaves, leaf area and fresh and dry mass of root, stem, and leaves. SP, CP and C seeds were fractionated into two and four parts and evaluated for their ability to germinate and produce normal seedlings. Seeds and seedlings from manual cross-pollination were the most vigorous. The worst performance of the natural pollination (C) evidenced the pollen limitation caused by the scarcity of efficient pollinators in the study area.

scholarly journals Quality of pre-sprouted sugarcane seedlings grown on substrates with decomposed babassu palm stem

2021 ◽  
Vol 51 ◽  
Author(s):  
Romário Martins Costa ◽  
Marcos Renan Lima Leite ◽  
Sâmia dos Santos Matos ◽  
Rayssa Carolinne Mouzinho de Sousa ◽  
Raissa Rachel Salustriano da Silva-Matos ◽  
...  
Keyword(s):  
Growth And Development ◽  
Dry Mass ◽  
Quality Parameters ◽  
Point Of View ◽  
Production Costs ◽  
Economic Point ◽  
Babassu Palm ◽  
Number Of Leaves ◽  
The Cost

ABSTRACT The use of pre-sprouted seedlings in the implantation of sugarcane crops not only reduces the establishment period and production costs, but also has other advantages, such as a lesser requirement of propagules (stems) and greater phytosanitary control of the seedlings, when compared to conventional planting. Commercial substrates are also expensive and their use increases the cost of seedlings. This study aimed to evaluate the quality of sugarcane pre-sprouted seedlings grown on substrates with different proportions of decomposed babassu palm stem (DBPS), as well as to recommend the substrate formulation that provides the most favorable environment for the growth and development of sugarcane pre-sprouted seedlings. For preparation of the substrate (S), DBPS and soil were used in the following proportions: S1: 0 % of DBPS + 100 % of soil; S2: 20 % of DBPS + 80 % of soil; S3: 40 % of DBPS + 60 % of soil; S4: 60 % of DBPS + 40 % of soil; S5: 80 % of DBPS + 20 % of soil; S6: 100 % of DBPS + 0 % of soil. The use of S2 and S3 considerably improved the seedling quality parameters, such as sprout diameter and length, number of leaves and total, shoot and root dry mass. However, from an economic point of view, S2 is recommended for use.

scholarly journals Rocket plants in response to nitrogen concentration in nutrient solution

2021 ◽  
Vol 39 (3) ◽  
pp. 341-345
Author(s):  
Paulo Henrique S Silva ◽  
Arthur Bernardes Cecílio Filho ◽  
Isaias dos S Reis ◽  
Carolina S Nascimento ◽  
Camila S Nascimento
Keyword(s):  
Nutrient Solution ◽  
Block Design ◽  
Nitrogen Concentration ◽  
Dry Mass ◽  
Nitrate Content ◽  
Hydroponic System ◽  
N Concentration ◽  
Randomized Block Design ◽  
Number Of Leaves

ABSTRACT Nitrogen (N) is the second most accumulated nutrient in rocket. This nutrient greatly affects growth, productivity and quality of the vegetable. Rocket is the second most widely grown leafy vegetable in hydroponic system; however, no studies on how N concentration in nutrient solution affects this crop can be found in literature. We studied four concentrations (79.2; 118.8; 158.4 and 237.6 mg L-1 of N) in a randomized block design with five replicates. Maximum number of leaves, leaf area, dry mass and productivity of rocket cv. ‘Folha larga’ were obtained with the highest N concentration. The rocket quality, evaluated by the nitrate content, was maximum with 210.2 mg L-1 of N and its value in the concentration which maximized productivity is in the acceptable range for vegetables; so, it is recommended to grow rocket with 237.6 mg L-1 of N in the nutrient solution.

scholarly journals Water-retaining polymers on the early growth and quality of bushy cashew (Anacardium humile A. St. Hill) seedlings

2020 ◽  
Vol 11 ◽  
pp. e3277
Author(s):  
Antonio Gabriel Ataide Soares ◽  
Ruthanna Isabelle De Oliveira ◽  
Thaynara Mota Venança ◽  
Gabriela de Oliveira Pinheiro ◽  
Alex Pinto Matos ◽  
...  
Keyword(s):  
Sandy Loam ◽  
Dry Mass ◽  
Germination Percentage ◽  
Positive Influence ◽  
Early Growth ◽  
Endemic Plant ◽  
Volume Number ◽  
Number Of Leaves ◽  
Endemic Plant Species

Bushy cashew (Anacardium humile A. St. Hill) is an endemic plant species to the Brazilian Cerrado, a region characterized by scarce and poorly distributed rainfall. The use of hydrogel, a water-retaining polymer that features massive water storage and promotes its release into the environment throughout time may be an alternative to reduce the frequency irrigation in the production of bushy cashew seedlings. This study aimed to evaluate the quality and early growth of bushy cashew seedlings as a function of hydrogel doses. The experimental design adopted was in five randomized blocks, with five hydrogel doses (0; 1,0; 2,0; 3,0; and 4,0 g L-1 of soil), and each plot consisting of 10 seedlings, totaling 250 plants. A Yellow Latosol with sandy-loam texture was used for seedling production. The growth evaluation was performed through the variables of emergence speed index, germination percentage, height, diameter, root volume, number of leaves, shoot dry mass, root dry mass, and the Dickson quality index. The results revealed a positive influence of the hydrogel on the growth and quality of bushy cashew seedlings, notably at the dose of 4 g L-1 of soil.

scholarly journals Temporal changes in the most effective pollinator of a bromeliad pollinated by bees and hummingbirds

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e8836 ◽  
Author(s):  
Roberta Luisa Barbosa Leal ◽  
Marina Muniz Moreira ◽  
Alessandra Ribeiro Pinto ◽  
Júlia de Oliveira Ferreira ◽  
Miguel Rodriguez-Girones ◽  
...  
Keyword(s):  
Reproductive Success ◽  
Functional Groups ◽  
Pollen Limitation ◽  
Temporal Variations ◽  
Floral Visitor ◽  
Floral Visitors ◽  
Natural Pollination ◽  
Reproductive Events ◽  
Effective Pollinator ◽  
Generalist Pollination

A generalist pollination system may be characterized through the interaction of a plant species with two or more functional groups of pollinators. The spatiotemporal variation of the most effective pollinator is the factor most frequently advocated to explain the emergence and maintenance of generalist pollination systems. There are few studies merging variation in floral visitor assemblages and the efficacy of pollination by different functional groups. Thus, there are gaps in our knowledge about the variation in time of pollinator efficacy and frequency of generalist species. In this study, we evaluated the pollination efficacy of the floral visitors of Edmundoa lindenii (Bromeliaceae) and their frequency of visits across four reproductive events. We analyzed the frequency of the three groups of floral visitors (large bees, small bees, and hummingbirds) through focal observations in the reproductive events of 2015, 2016, 2017, and 2018. We evaluated the pollination efficacy (fecundity after one visit) through selective exposure treatments and the breeding system by manual pollinations. We tested if the reproductive success after natural pollination varied between the reproductive events and also calculated the pollen limitation index. E. lindenii is a self-incompatible and parthenocarpic species, requiring the action of pollinators for sexual reproduction. Hummingbirds had higher efficacy than large bees and small bees acted only as pollen larcenists. The relative frequency of the groups of floral visitors varied between the reproductive events. Pollen limitation has occurred only in the reproductive event of 2017, when visits by hummingbirds were scarce and reproductive success after natural pollination was the lowest. We conclude that hummingbirds and large bees were the main and the secondary pollinators of E. lindenii, respectively, and that temporal variations in the pollinator assemblages had effects on its reproductive success. Despite their lower pollination efficacy, large bees ensured seed set when hummingbirds failed. Thus, we provide evidence that variable pollination environments may favor generalization, even under differential effectiveness of pollinator groups if secondary pollinators provide reproductive assurance.

Potted platycodon production in response to paclobutrazol

2021 ◽  
Vol 51 ◽  
Author(s):  
João Henrique Ferreira Sabino ◽  
José Antonio Saraiva Grossi ◽  
Toshik Iarley da Silva ◽  
Otávio Miranda Verly ◽  
Sebastião Martins Filho ◽  
...  
Keyword(s):  
Leaf Area ◽  
Stem Elongation ◽  
Dry Mass ◽  
Shoot Length ◽  
Flower Buds ◽  
Flower Diameter ◽  
Number Of Leaves ◽  
Higher Doses ◽  
Ornamental Species

ABSTRACT Platycodon grandiflorus is an ornamental species that can be marketed as a potted flower; however, it has fragile and bending floral stems. Plant growth regulators, such as paclobutrazol, are compounds that reduce stem elongation, enabling the production of plants with a more compact formation. This study aimed to evaluate the effects of paclobutrazol on platycodon growth, in a greenhouse. A completely randomized blocks experimental design was used in a 4 × 5 factorial scheme, with four replicates. The treatments consisted of four varieties of ‘Astra Semi-Double’ platycodon (Blue, Lavender, Pink and White) and five paclobutrazol doses (0, 1.25, 2.5, 3.75 and 5.0 mg pot-1). The paclobutrazol application did not affect the stem diameter, number of leaves, days until anthesis, number of flowers or flower buds, and flower diameter. The shoot length, leaf area and shoot dry mass decreased with higher doses of the growth regulator. Lavender showed the highest values for shoot length, number of leaves, leaf area and shoot dry mass. Pink had the earliest anthesis, followed by Blue and White, whereas Lavender had the latest anthesis. The dose of 3.75 mg pot-1 of paclobutrazol efficiently controlled the growth and improved the visual quality of all the platycodon varieties.

scholarly journals Production of Cashew Rootstocks Submitted to Organic and Mineral Fertilization

2018 ◽  
Vol 10 (4) ◽  
pp. 392
Author(s):  
Valéria F. de O. Sousa ◽  
Gisele L. dos Santos ◽  
Marília H. B. Rodrigues ◽  
Senyonne F. Pimenta ◽  
Genilson L. Diniz ◽  
...  
Keyword(s):  
Agricultural Production ◽  
Mineral Fertilizer ◽  
Dry Mass ◽  
Cultural Practice ◽  
Mineral Fertilization ◽  
Number Of Leaves ◽  
Four Levels ◽  
Cashew Tree ◽  
The City

The use of grafted seedlings is a cultural practice that aims at the optimization of agricultural production, and materials of organomineral added to the substrate can help in the well development. The aim of this study was to evaluate the effect of the application of increasing doses of organic and mineral material on the development of cashew rootstocks. The test was conducted in the experimental area of the Federal University of Campina Grande (UFCG), campus Pombal-PB in the period from July to September 2017. The treatments were constituted of five increasing doses of organic matter (0, 100, 200, 300 and 400 g of bovine manure) and four levels of mineral fertilizer (0, 1, 2 and 3 g of NPK). The design was in randomized blocks, distributed in factorial 5 × 4, with 4 replications. For the planting, it was used creole seeds originary of the city of Livramento do Cariri Paraibano and substrate composed by sand texture Franco sandy. At 60 days after sowing, the following variables were analyzed: plant height (cm), leaf diameter (mm), number of leaves, leaf area (cm2), fresh and dry mass, leaf, stem, shoot (g), percentage of biomass (%) and quality index of seedlings. Based on the results obtained, it is concluded that the organic and mineral combination (1 g of NPK and 200 g of bovine manure) provided the greatest increases in vegetative growth characteristics and quality of rootstocks in the cashew tree.

scholarly journals Influência do número de folíolos e nós no enraizamento de estacas semilenhosas de cipó-de-são-joão

2015 ◽  
Vol 21 (3) ◽  
pp. 339
Author(s):  
Marília Milani ◽  
Willian Heintze ◽  
Gilmar Schafer ◽  
Paulo Vitor Dutra De Souza
Keyword(s):  
Experimental Design ◽  
Technical Information ◽  
Dry Weight ◽  
Dry Mass ◽  
Rooted Cuttings ◽  
Rice Hulls ◽  
First Order ◽  
Number Of Leaves ◽  
Pyrostegia Venusta

The flame vine (Pyrostegia venusta (Ker-Gawl.) Miers) is a semihardwood vine, vigorous, native, native, occurring in all Brazilian biomes and ornamental potential. Technical information about the propagation of this species will contribute to the production of seedlings and with that, their greatest use in landscaping. This study aimed to evaluate the influence of the number of leaves and nodes in rooting intermediate flame vine. The experiment was conducted under conditions of intermittent mist. The experimental design was a randomized block in factorial 2 x 3, being respectively cuttings with one or two nodes, and zero, one or two leaflets. We used four replicates with plots consisting of 12 cuttings placed in substrate of rice hulls in polystyrene trays with 72 cells. We evaluated at 84 days the porcentage of rooted cuttings, length of shoots, dry weight of shoots and, per cutting, average: number of roots - first order; maximum length of each root of the first order, volume and dry weight of roots. It was observed that cuttings with two leaflets enabled 66% of rooting, greater length and dry mass of shoots. The higher quality of the root system occurs with stakes with two leaflets and two nodes. The spread of flame vine is efficient with semi-hardwood cuttings with two nodes and two leaflets, kept in a greenhouse under intermittent mist.

scholarly journals Intercropping of beet with salad rocket (Eruca sativa) using hairy woodrose (Merremia aegyptia) plus manure goat in loam argisol yellow red latosol

2020 ◽  
pp. 1675-1681
Author(s):  
Lunara de Sousa Alves ◽  
Paulo César Ferreira Linhares ◽  
Roberto Pequeno de Sousa ◽  
Janilson Pinheiro de Assis ◽  
Thiago Jardelino Dias ◽  
...  
Keyword(s):  
Plant Height ◽  
Dry Mass ◽  
Root Yield ◽  
Average Value ◽  
Family Farmers ◽  
Number Of Leaves ◽  
Red Latosol ◽  
Goat Manure ◽  
Sugar Beet Crop

The crop intercropping is a viable option for family farmers who grow in small spaces and need to take advantage of all the available area. The objective of this study was to evaluate the agronomic viability of the intercropping of beet with salad rocket (arugula) under different amounts of Merremia aegyptia plus goat manure. The experiment was conducted at Rafael Fernandes Experimental Farm, in the Alagoinha district, rural area of Mossoró-RN, from August to December 2016. The experimental design was a randomized complete block with treatments arranged in a 2 x 4 factorial scheme, with three repetitions. The first factor was the single beet and second intercropped cultivation of beet and arugula. The second factor was the amount of Merremia aegyptia plus goat manure (0.0, 1.5, 3.0 and 4.5 kg m-2). For the sugar beet crop the following characteristics were evaluated: plant height, fresh leaf mass, commercial root yield and root dry mass. For arugula culture the following characteristics were evaluated: plant height, number of leaves per plant, yield, number of sauces and dry mass. The best agronomic performance of the beet and rocket intercropping was obtained in the amount of 4.5 kg m-2 of M. aegyptia beds and goat manure. The consortium presented an area ratio equivalent to over 1.0, with an average value of 1.81 in the amount of 4.5 kg m-2 of M. aegyptia flowerbed plus goat manure. The consortium contributed to better use of available resources without compromising the commercial quality of the vegetables

scholarly journals Gibberellic Acid Utilization in Seeds and Plants of Beans: Effect on Growth and Seeds Physiological Quality

2019 ◽  
Vol 11 (2) ◽  
pp. 541 ◽  
Author(s):  
Lanes B. A. Jaques ◽  
Ivan R. Carvalho ◽  
Vinícius J. Szareski ◽  
João R. Pimentel ◽  
Cristian Troyjack ◽  
...  
Keyword(s):  
Gibberellic Acid ◽  
Seed Treatment ◽  
Dry Mass ◽  
Morphological Attributes ◽  
Randomized Design ◽  
Physiological Quality ◽  
Number Of Leaves ◽  
Completely Randomized Design ◽  
Bean Crop

The growth regulators from gibberellins, when applied on plants, might improve physic and physiological features, stimulate cell division and elongation, this study aimed at evaluating the influence of gibberellic acid doses applied exogenously on bean crop through seed treatment, and analyzing its effects on morphological attributes of seedlings and physiological quality of the seeds produced. The experimental design was completely randomized design, with treatments corresponding to the doses: zero (distilled water only), 50, 100 and 200 mg L-1, arranged in four replicates. The use of gibberellic acid in bean seeds did not result in changes on the number of leaves, leaf area, dry mass of leaves and stem. Applications of foliar gibberellic acid potentiated stem height and root dry mass of seedlings.

scholarly journals PHOSPHATE AND POTASSIUM FERTILIZATION FOR RADISH GROWN IN A LATOSOL WITH A HIGH CONTENT OF THESE NUTRIENTS

2017 ◽  
Vol 30 (2) ◽  
pp. 412-419 ◽  
Author(s):  
ARTHUR BERNARDES CECÍLIO FILHO ◽  
ALEXSON FILGUEIRAS DUTRA ◽  
GILSON SILVERIO DA SILVA
Keyword(s):  
Ground Water ◽  
Factorial Design ◽  
Leaf Area ◽  
Crop Yields ◽  
Dry Mass ◽  
Plant Leaf ◽  
Potassium Fertilization ◽  
Chemical Fertilization ◽  
Number Of Leaves ◽  
Better Than

ABSTRACT The intensive cultivation of vegetables with frequent chemical fertilization may cause accumulation of nutrients in the soil. This, in turn, may reduce crop yields and damage the environment due to contamination of ground water and rivers. Thus, to increase the effects of P (0, 100, 200, 300 and 400 kg ha -1 of P2O5) and K (0, 60, 120, 180 and 240 kg ha-1 of K2O) doses on the growth and productivity of radish cultivars (Sakata 19 and Sakata 25) in a soil with high levels of these nutrients, two experiments were conducted in randomized blocks with the factors cultivars and doses arranged in a 2 x 5 factorial design with three replications. Number of leaves per plant, leaf area, shoot and root dry mass, total and commercial productivity, percentage of cracked roots and P and K contents in the plant and in the soil were evaluated. The Sakata 19 cultivar performed better than the Sakata 25 in both experiments. The fertilization with P or K did not influence the growth and the productivity of both radish cultivars. Therefore, both cultivars of radish evaluated do not need to be fertilized with P and K when planted in a Latosol with high levels of these nutrients.

Sign in / Sign up

Export Citation Format

Share Document