scholarly journals Blepharipoda spinosa (H. Milne Edwards & Lucas, 1841) and Lepidopa chilensis Lenz, 1902 (Crustacea: Hippoidea) larvae on a north-central zone of Chile

2021 ◽  
Vol 49 (4) ◽  
pp. 678-683
Author(s):  
Armando Mujica ◽  
Francisca González-Salas ◽  
María Luisa Nava
Keyword(s):  
Interannual Variation ◽  
Central Zone ◽  
Reproductive Activity ◽  
Development Stage ◽  
Sandy Beaches ◽  
Larval Abundance ◽  
Frequency Of Occurrence ◽  
Sampling Area ◽  
North Central ◽  
Development Stages

The larvae of Blepharipoda spinosa and Lepidopa chilensis were collected from Chile's north-central coast (Paposo 25.0ºS and Oscuro Port 31.5ºS) in each February of 2013-2017. Larvae were separated by their development stage. Their abundance, occurrence, and distribution concerning its proximity to the coast were analyzed. Larval abundance and frequency of occurrence were low in both species. Zoea I dominated the highest concentrations detected in coastal stations and near the study area's longest sandy beaches. Interannual variation of larvae was seen in the abundance and composition by development stages. The highest abundance of B. spinosa larvae was found in February 2016, while L. chilensis larvae had the highest abundance in February 2014. Their presence and development stages in the wide sampling area provide information on both species' distribution and reproductive activity.

scholarly journals Ethylene and 1-methylcyclopropene action over senescence of nasturtium flowers

2015 ◽  
Vol 33 (4) ◽  
pp. 453-458 ◽  
Author(s):  
Tania P Silva ◽  
Fernando L Finger
Keyword(s):  
Floral Development ◽  
Development Stage ◽  
Flower Senescence ◽  
Premature Senescence ◽  
Flower Opening ◽  
Development Stages ◽  
Post Harvest ◽  
The Third ◽  
Exogenous Ethylene ◽  
Floral Bud

ABSTRACT: This work describes ethylene and 1-methylcyclopropene (1-MCP) action on post-harvest shelf life of four development stages of nasturtium flowers. To reach this goal, we carried out three experiments. In the first and second experiments, we studied five ethylene (0; 0.1; 1; 10; 100 and 1000 μL/L) and three 1-MCP concentrations (0.25; 0.5 and 0.75 μL/L), respectively. In the third experiment, 1-MCP was followed by combined with ethylene (only 1-MCP; only ethylene; and 24 hours of exposure to 0.75 μL/L 1-MCP followed by 24 hours of exposure to 100 μL/L ethylene). All experiments had two control treatments, one keeping non-exposed flowers inside and another outside exposure chambers. Experiments were set in factorial design, in complete blocks at random, with four 10-flower replications each. Flower senescence was determined by a pre-established visual scale and by observing floral bud development. Ethylene dose above 10 μL/L induced flower wilting and premature senescence from the second floral development stage. Furthermore, higher concentrations of exogenous ethylene promoted irregular flower opening and/or morphological abnormalities in opened flowers. 1-MCP effectively extended post-harvest longevity of nasturtium flowers, independent of the concentration and even in the presence of exogenous ethylene.

scholarly journals Efecto de medicamentos homeopáticos en plantas de tomate (Solanum lycopersicum L.)

2020 ◽  
Vol 38 (1) ◽  
pp. 103
Author(s):  
Fernando Abasolo Pacheco ◽  
Boris Bonilla Montalván ◽  
Cesar Bermeo Toledo ◽  
Yarelys Ferrer Sánchez ◽  
Andy Jafet Ramirez Castillo ◽  
...  
Keyword(s):  
Root Biomass ◽  
Block Design ◽  
Development Stage ◽  
Stem Length ◽  
Control Treatment ◽  
Leaf Biomass ◽  
Control Group ◽  
Vegetative Development ◽  
Initial Development ◽  
Development Stages

Agrochemical use in horticultural cultivations generates negative effects, thus the need for searching to decrease or eliminate its use by means of other less toxic techniques. Agricultural homeopathy represents an alternative for ecological agriculture, impacting positively in cultivation development. The effect of four homeopathic medicines for human use were assessed in two centesimal dynamizations (7CH and 13CH) [(Silicea Terra (SiT), Natrum muriaticum (NaM), Zincum phosphoricum (ZiP) and Phosphoricum acidum (PhA)], and a control treatment (distilled water) on tomato plant germination, emergence, and initial development. The treatments were established under a randomized complete block design with three repiclates. Germination and emergence rate and percentage and morphometric variables (plant height, radicle length, dry and wet weight) were assessed, including the variables in stem diameter and wet and dry leaf weight, number of branches, leaves, and buds in the vegetative development stage. Signif icant differences were observed in all the morphometric variables assessed in function of the different development stages, homeopathic medicines, and their different dynamizations. During germination, greater growth in stem length was observed with ZiP-7CH (5.5 ± 0.98 cm) compared to the control group (4.3 ± 1.10 cm). During the emergence stage, the treatments SiT-7CH (6.6 ± 1.11 cm) and ZiP-7CH (5.9 ± 1.41 cm) increased stem length signif icantly whereas with PhA-7CH, the best effects were obtained in the variables assessed during the vegetative development stage, LT (94 ± 8.31 cm), leaf number (No hojas) (131 ± 27.71), fresh stem biomass (BFT) (17.20 ± 2.45 g), wet leaf biomass (BFH) (30 ± 7.72 g), dry leaf biomass (BSH) (2 ± 0.61 g), fresh root biomass (BFR) (10 ± 6.26 g), dry root biomass (BSR) (1 ± 0.43 g), and number of flower buds (No H) (6 ± 7.10). The homeopathic medicines applied impacted positively during the initial and vegetative development stages of tomato under controlled conditions. This research study represents and advance in the sustainable management of tomato cultivation.

ECOLOGICAL CHANGE AND HEALTH SECURITY IN NORTH CENTRAL REGION OF NIGERIA

2020 ◽  
pp. 15-21
Keyword(s):  
Central Zone ◽  
Ecological Change ◽  
Security Issue ◽  
Health Security ◽  
North Central ◽  
Social Challenges ◽  
Security Issues ◽  
The North ◽  
The People ◽  
Health Related

The change in our ecosystem today has creates a lot social challenges. Climate change which is one of the major causes of ecological change is attributed to both the nature and human causes. The issue has resulted in many soft security issues such as health related security issue, food security issue and socio-economic issue. This study examines how ecological change has affected health security of the people in the study area. The study use a sample of three states in the North central zone of Nigeria. The study uses an observation of 385 and the data collected were analyses using Kendell tau test of concordance. The study has found that ecological changes have significant effect on health security in the study area. The study notes that ecological change increase vulnerability to diseases such as malaria, typhoid and zoonosis. These happening thus creates health related issues in the affected areas. On the basis of the finding, it is recommended people in the affect areas should need to be health cautious by treating their drinking water and using anti-mosquitos nets and to equally avoid contact with unfamiliar animals. Keywords: Ecological change, health security and test of concordance

scholarly journals Molecular Analysis of Mycobacterium tuberculosis Isolated in the North Central Zone of Nigeria

2019 ◽  
Vol 9 (4) ◽  
pp. 259 ◽  
Author(s):  
Benjamin David Thumamo Pokam ◽  
Dorothy Yeboah-Manu ◽  
Lovett Lawson ◽  
Prisca Wabo Guemdjom ◽  
Ruth Okonu ◽  
...  
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Molecular Analysis ◽  
Central Zone ◽  
North Central ◽  
The North

scholarly journals Characterization of Endogenous Gibberellins and Molecular Cloning of a Putative Gibberellin 3-Oxidase Gene in Bunching Onion

2011 ◽  
Vol 136 (6) ◽  
pp. 382-388 ◽  
Author(s):  
Nobutaka Shiraiwa ◽  
Kaori Kikuchi ◽  
Ichiro Honda ◽  
Masayoshi Shigyo ◽  
Hiroko Yamazaki ◽  
...  
Keyword(s):  
Reproductive Organs ◽  
Development Stage ◽  
Allium Fistulosum ◽  
Late Development ◽  
Oxidase Gene ◽  
Development Stages ◽  
Ga Biosynthesis ◽  
Bunching Onion

To clarify the role of gibberellin (GA) in the growth of bunching onion (Allium fistulosum), identification of endogenous GAs and expression analysis of a putative gibberellin 3-oxidase (AfGA3ox1) were conducted. GA1, GA3, GA4, GA9, GA20, and GA34 were identified with levels of GA4 and GA9 being higher than those of GA1, GA3, and GA20. The young seedlings were clearly elongated by exogenous GA4 treatment but not by GA3. These results indicate that the 13-non-hydroxylation pathway of GA biosynthesis may be predominant in shoots with GA4 playing an important role in the growth of bunching onion. Expression of AfGA3ox1 was higher in leaf sheaths than leaf blades during vegetative growth. In reproductive organs, expression of AfGA3ox1 was higher at early and middle development stages in the stalks but was detected at a late development stage in the umbels. AfGA3ox1 was mapped on chromosome 7A from shallot, a bunching onion-related species.

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