scholarly journals Novo híbrido de orquídea Cattleya

2018 ◽  
Vol 24 (2) ◽  
pp. 145-148
Author(s):  
Guilherme Augusto Cito Alves ◽  
Rodrigo Thibes Hoshino ◽  
Douglas Junior Bertoncelli ◽  
Ronan Carlos Colombo ◽  
Vanessa Stegani ◽  
...  
Keyword(s):  
Vigorous Plant

The hybrid, obtained by back crossing between (Cattleya labiata x Cattleya forbesii) x Cattleya labiata is a vigorous plant, bi- or unifoliate, features slender and cylindrical pseudobulbs and leathery dark-greenish leaves, with oblanceolate shape format of blunt tips with the first flowering four years after sowing. In Londrina, flowering occurred twice a year, between the months of April and May and October and November with 2-4 flowers per pseudobulb and durability ranging from 15 to 20 days. The flowers of the new hybrid were purple with a labellum with a yellow center and purple stripes.

Effect of method and time of application of nitrogen fertiliser on yield and quality of seed of creeping red fescue

2000 ◽  
Vol 80 (4) ◽  
pp. 809-811 ◽  
Author(s):  
N. A. Fairey ◽  
L. P. Lefkovitch
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Seed Quality ◽  
Early Spring ◽  
Festuca Rubra ◽  
Grass Seed ◽  
Red Fescue ◽  
Time Of Application ◽  
Vigorous Plant ◽  
Tiller Density

Six trials were conducted on commercial seed fields of creeping red fescue (Festuca rubra L. var. rubra) in the Peace region to evaluate the sensitivity of seed production to the method and time of application of N fertiliser. In each trial, 68 kg ha−1 N was applied using three methods (surface-broadcast, granular, ammonium nitrate 34-0-0; foliar/soil spray of 28-0-0 solution N; soil-injected 28-0-0 solution N) at each of three times (fall, early spring, late spring). No statistically significant (P = 0.05) interaction, or main effect, of method and time of N were revealed for seed yield, fertile tiller density or for several seed quality characteristics. Seed yield varied greatly among trials (142 to 1240 kg ha−1) and averaged 566 kg ha−1. The results indicate that there is considerable flexibility in the method and time of application of N fertiliser for seed production of creeping red fescue in the Peace region, provided it is applied before the commencement of vigorous plant growth in the spring. Key words: Creeping red fescue, Festuca rubra L., nitrogen fertility, grass seed production, grass seed quality

scholarly journals The bigger the better? Vigour of the exotic host plant Calotropis procera (Apocynaceae) affects herbivory

2020 ◽  
Vol 15 (3) ◽  
pp. 359-366
Author(s):  
Geraldo Wilson Fernandes ◽  
Jarcilene Silva de Almeida ◽  
Maria Fernanda Vicente Rodrigues-Menelau ◽  
Lucas Arantes-Garcia ◽  
Samuel Novais
Keyword(s):  
Host Plant ◽  
Leaf Area ◽  
Regional Scale ◽  
Calotropis Procera ◽  
Insect Herbivores ◽  
Plant Vigour ◽  
Seasonally Dry ◽  
Shoot Size ◽  
Vigorous Plant ◽  
Leaf Herbivory

The Plant Vigour Hypothesis states that herbivores preferentially feed on the most vigorous plants within a plant population and/or the most vigorous modules within a plant. The goal of this study was to evaluate how shoot size (as an indication of module vigour) affects leaf herbivory in the host plant Calotropis procera, an exotic xerophyte perennial milkweed shrub. We predicted that the proportion of leaf area removed by insect herbivores would be positively related to shoot size. Eight patches were selected containing a varied number of C. procera individuals (5, 8, 29, 31, 55, 79, 116, and 172 individuals/patch) in the Brazilian seasonally dry vegetation (Caatinga), of which five individuals were randomly selected for further analysis. From each individual, three to six shoots were randomly selected, measured and had their leaves collected, for a total of approximately 200 leaves per patch. At the regional scale, the proportion of leaf area removed was positively affected by shoot size. In addition, this pattern was also found for the majority of the studied patches (29, 31, 55, 116, and 172 individuals/patch). Among the insect herbivores associated with C. procera, larvae of Danaus spp. (Lepidoptera: Nymphalidae) were commonly observed feeding on all patches. These herbivores present a specialized behaviour to circumvent the presence of latex in the host leaves. Although more vigorous plant modules should be better defended compared with the less vigorous modules, Danaus species were able to bypass host defences, and feed on healthy, rapidly growing and vigorous plant modules of C. procera, hence causing more damage to these modules.

scholarly journals Doses of controlled-release fertilizer for production of rubber tree rootstocks

CERNE ◽  
2012 ◽  
Vol 18 (2) ◽  
pp. 239-245 ◽  
Author(s):  
Antonio Nilson Zamunér Filho ◽  
Nelson Venturin ◽  
Ailton Vitor Pereira ◽  
Elainy Botelho Carvalho Pereira ◽  
Renato Luis Grisi Macedo
Keyword(s):  
Experimental Study ◽  
Controlled Release ◽  
Dry Matter ◽  
Block Design ◽  
Rubber Tree ◽  
Controlled Release Fertilizer ◽  
Randomized Block Design ◽  
Vigorous Plant ◽  
Plastic Containers ◽  
Root Collar

This experimental study aimed to evaluate the effects of doses of controlled-release fertilizer (ALL) on the development of rubber tree rootstocks. The fertilizer used was Osmocote®, scheduled to be released for 8-9 months and with the following composition: N (15%), P2O5 (9%), K2O (12%), Mg (1%), S (2.3%), B (0.02%), Cu (0.05%), Fe (1%), Mn (0.06%), Mo (0.02%) and Zn (0.05%). A randomized block design was used, with four treatments and eight replicates of 20 plants per plot. The controlled-release fertilizer was added to Rendimax Floreira® substrate at doses of 0, 3, 6 and 9 g per liter, and rootstocks were produced in plastic containers with a capacity of two liters of substrate. Three seeds of clone GT 1 were scattered in each container and thinning was performed on day 60, leaving the most vigorous plant only. After the fourth leaf shot from each rootstock, the containers of each treatment were topped, due to compaction, with 300 mL of the relevant fertilizer and substrate mixture. The rootstocks were evaluated at eight months of age as to height, stem diameter (DC) 5 cm above root collar, total dry matter, shoot and root dry matter, leaf nutrient levels and percentage of plants suitable for grafting (DC>1.0 cm). Results revealed that adequate development and nutrition of rootstocks was achieved by using 6 g of controlled-release fertilizer per liter of substrate.

Management of Wilt Complex of Chickpea with Seed Biopriming and Soil Application of Trichoderma spp.

2021 ◽  
Author(s):  
H.V. Parmar ◽  
N.M. Gohel
Keyword(s):  
Positive Impact ◽  
Trichoderma Viride ◽  
Effective Management ◽  
Trichoderma Spp ◽  
Soil Application ◽  
Chickpea Wilt ◽  
Vigorous Plant ◽  
Seed Biopriming

Background: Chickpea wilt complex caused by several soil-borne pathogens is a serious biotic constraint for chickpea production.Methods: To find out the effective management of the disease through seed biopriming and soil application of biocontrol agents under in vivo and in vitro conditions experiments were carried out during rabi 2018-19 and 2019-20 at Anand Agricultural University, Anand, Gujarat.Result: Seed biopriming showed a positive impact producing vigorous plant shoot and root system, besides disease control during in vitro conditions. While under in vivo conditions, the pooled results of two years revealed that seed biopriming for 10 h with the suspension of talc-based formulation (2 x 108 CFU/g) of Trichoderma viride or T. asperellum @ 50 g in 250 ml of water/kg of seed followed by soil application of T. viride or T. asperellum enriched FYM (10g/kg FYM) @ 100 g/m2 of soil found significant for the disease management as well as higher yield. The seed biopriming alone control the disease in the range of 23-34% and increased the yield of chickpea by 23-29%. However, combined applications of seed biopriming as well as soil application significantly control the disease in the range of 51-70% and increased the grain yield by 41-51% over untreated control.

An Explorement of Multi-Habitat Ecological Pond with Situ Water Purification Technology in Treating Nitrogen and Phosphorus from Petrochemical Wastewater

2012 ◽  
Vol 518-523 ◽  
pp. 2328-2335
Author(s):  
Ya Qin Yu ◽  
Xi Wu Lu
Keyword(s):  
Plant Growth ◽  
Aquatic Plants ◽  
Treatment Effects ◽  
Removal Rate ◽  
Petrochemical Wastewater ◽  
Nitrogen And Phosphorus ◽  
Rate Range ◽  
Petrochemical Wastes ◽  
Vigorous Plant ◽  
Coordinate Treatment

The objective is to explore degradation and removal of nitrogen and phosphorus in each unit of pond when using an artificially enhanced ecological system treats petrochemical wastes. The system consists of anoxic pond, the aerobic pond and aquatic plants pond, aiming to achieve a coordinate treatment effect in the multi-habitat system. The system combines treatment effects including assimilation, decomposition, interception, absorption, adsorption and filtration of microorganisms, aquatic plants and soil in the anaerobic, anoxic and aerobic state. It shows that the system has a good removal effect on COD, NH3-N, TN, and TP, and the removal rate range for each is 26.7% ~ 48.6%, 55.4% ~ 91.3%, 20.4% ~ 43.6% and 25.7% ~ 46.4%, respectively. It is also found that the treatment effects change with seasons, which are the best in summer because of vigorous plant growth and strong microbial activity. In conclusion, the system has a higher efficiency to remove nitrogen and phosphorus than the traditional stabilization pond technology.

scholarly journals Using SSR Markers to Verify Crapemyrtle Hybrids

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 1008E-1009
Author(s):  
Tim Rinehart ◽  
Cecil Pounders ◽  
Brian Scheffler
Keyword(s):  
Cold Hardiness ◽  
Flea Beetle ◽  
Germplasm Conservation ◽  
Future Research ◽  
Marker Assisted Breeding ◽  
Wide Range ◽  
Deciduous Shrubs ◽  
Growth Habits ◽  
Vigorous Plant ◽  
Maintenance Requirements

Crapemyrtles (Lagerstroemia) are deciduous shrubs or trees with prolific summer flowers. Their popularity is due in large part to low maintenance requirements in sunny climates, wide range of growth habits, disease resistance, and bark characteristics, as well as having a long flowering period (up to 120 days). Once well-established, they are extremely tolerant to heat and drought. Lagerstroemia was first introduced to the southern U.S. from southeast Asia more than 150 years ago, and is comprised of at least 80 known species. Most modern cultivars are L. indica and L. fauriei hybrids. L. speciosa is a tropical crapemyrtle with very large flowers, but lacks cold hardiness. It is a vigorous plant, but only when grown in Hardiness zones 9 or 10. We recently established microsatellite markers for Lagerstroemia and evaluated their utility for verifying interspecific hybrids. Here we verify F1 hybrids between L. indica `Tonto', `Red River', and L. speciosa. We also genotyped two commercially available L. speciosa hybrids. Currently, we are using crapemyrtle SSRs for cultivar identification and germplasm conservation. Future research includes marker-assisted breeding to produce powdery mildew and flea beetle resistant cultivars, as well as improved growth habit and fall foliage color.

scholarly journals Molecular Markers for the Detection of Genetic Drift: The Case of Pea and Ryegrass

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 692c-692
Author(s):  
Charles J. Simon ◽  
Richard C. Johnson
Keyword(s):  
Genetic Diversity ◽  
Molecular Markers ◽  
Plant Introduction ◽  
Gene Frequencies ◽  
Virus Eradication ◽  
Genetic Changes ◽  
Germplasm Collections ◽  
Loss Of Genetic Diversity ◽  
Western Regional ◽  
Vigorous Plant

Maintenance of genetic resources within the National Plant Germplasm System includes preserving the genetic constituency of accessions as close to the original sample as possible. Genetic changes that can arise during seed regeneration include both an overall loss of genetic diversity within heterogenous accessions and changes in the gene frequencies within accessions. Two germplasm collections are being examined with molecular methods at the Western Regional Plant Introduction Station (WRPIS) for evidence of such genetic change. In the case of pea, gross observation of seed and plant characters indicate that vigorous plant culling during a comprehensive Pea Seedbourne Mosaic Virus eradication program a decade ago resulted in the overall loss of genetic diversity in some heterogenous accessions. Isozyme data has corroborated these observations. Molecular markers are beginning to be used, both to quantify possible genetic changes in accessions as a result of the eradication process, and to document success in reintroducing diversity by repeating the eradication process with additional seed from archival seedlots. In the case of ryegrass, the practice of bulking the seed harvested from regeneration plots may bias the seedlot toward genotypes that are more fruitful. Isozyme analysis after two regeneration cycles showed that balanced sampling (equal seed no./plant) maintained allele frequencies close to the original seed sample. A bulk harvest sample and a sample with an equal number of spikes harvested from each plant showed some significant change in allele frequency, but no significant changes were seen in the allelic richness of accessions, or in the level of an accession's overall heterozygosity. A regeneration sample with an equal number of seed/plant will therefore best preserve gene frequencies within accessions, but loss of an accessions overall diversity will not diminish as a result of less than ideal sampling methods in ryegrass.

Effect of phosphate solubilizing bacteria and arbuscular mycorrhizal fungi with and without rock phosphate on four forest tree seedlings

2016 ◽  
Vol 6 (01) ◽  
pp. 5204 ◽  
Author(s):  
Sharanappa Jangandi ◽  
Chaitra B. Negalur* ◽  
Mr. Narayan ◽  
H. C. Lakshman
Keyword(s):  
Plant Growth ◽  
Mycorrhizal Fungi ◽  
Rock Phosphate ◽  
Arbuscular Mycorrhizal ◽  
Am Fungi ◽  
Forest Tree ◽  
P Uptake ◽  
Tree Seedlings ◽  
Phosphate Solubilizing Bacteria ◽  
Vigorous Plant

The effect of phosphorus solubilizing bacteria Bacillus polymyxa and AM-mycorrhizal fungi Rhizophagus fasciculatus with and without rock phosphate treatments on growth of Terminalia paniculata and T. tomentosa were studied in nursery. The results showed that the combined inoculation of both PSB, AM fungi and rock phosphate produced vigorous plant growth of tree seedlings for quick planting. The experiments clearly demonstrated that the combined inoculation of PSB and AM fungi brought marked increase in plant growth, dry matter, and P uptake when, compared to individual inoculants or non-inoculated plants. The increase in growth was attributed to the increase in P uptake in shoots of the seedlings. The results indicated that both organisms have synergistic effect with additional 250 mg RP/kg rock phosphate treatment for T.paniculata Roth. and 150 mgRP/kg for T.tomentosa W.& A. in green house conditions.

Salicylic Acid for Vigorous Plant Growth and Enhanced Yield Under Harsh Environment

2021 ◽  
pp. 99-127
Author(s):  
Sahil ◽  
Radhika Keshan ◽  
Sahil Mehta ◽  
K. F. Abdelmotelb ◽  
S. K. Aggarwal ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Plant Growth ◽  
Harsh Environment ◽  
Vigorous Plant ◽  
Enhanced Yield

scholarly journals Evaluating an Interspecific Helianthus annuus × Helianthus nuttallii Line for Use in Sunflower Breeding Program

2018 ◽  
Vol 6 (12) ◽  
pp. 1684 ◽  
Author(s):  
Roumiana Dimova Vassilevska-Ivanova ◽  
Ira Stancheva ◽  
Maria Geneva ◽  
Zoya Tcekova
Keyword(s):  
Inbred Line ◽  
Plant Material ◽  
Interspecific Cross ◽  
Reproductive Traits ◽  
Morphological Characters ◽  
Anthocyanin Pigmentation ◽  
Remarkable Feature ◽  
Plant Habit ◽  
The Common ◽  
Vigorous Plant

Interspecific cross was made between the common sunflower inbred line HA89 and an accession of wild Helianthus nuttallii (2n=2x=34) resistant to the most harmful disease complex and tolerant to drought and high temperature. The recombinant inbred line was a BC1F15 progeny. The most remarkable feature observed was the vigorous plant habit that manifests itself in measurable morphological characters such as increment plant height, stem diameter and diameter of the head. The line was non-branched (monocephalic) without anthocyanin pigmentation and possessed good agronomic characteristics. Along with the morphological and reproductive traits, some biochemical characteristics related to antioxidant activity were associated to wide hybridization. The overall characteristics of HA-Hnutt line make it a useful plant material for research on interspecific hybridization in Helianthus genus.

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