Effect of Different Amounts of Winter Chilling on Fruitfulness of Several Olive Varieties

1957 ◽  
Vol 119 (2) ◽  
pp. 102-104 ◽  
Author(s):  
H. T. Hartmann ◽  
I. Porlingis
Keyword(s):  
Olive Varieties ◽  
Winter Chilling

Both spring warmth and winter chilling can affect spring phenology of butterflies

2016 ◽  
Author(s):  
Sandra Stålhandske
Keyword(s):  
Spring Phenology ◽  
Winter Chilling

A Leaf Bud Development Scale for Rabbiteye Blueberry

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 455f-456 ◽  
Author(s):  
D. Scott NeSmith ◽  
Gerard Krewer ◽  
Jeffrey G. Williamson
Keyword(s):  
Reproductive Development ◽  
Developmental Differences ◽  
Research Management ◽  
Growth Stages ◽  
Vaccinium Ashei ◽  
Bud Development ◽  
Dormant Bud ◽  
Mouse Ear ◽  
Highbush Blueberries ◽  
Winter Chilling

Crop vegetative and reproductive development are frequently divided into stages to describe progression of development. Such a description is useful in denoting developmental differences between cultivars, for making crop management decisions based on growth stages, and for clear communication among individuals concerned with research, management, and production of the crop. We have developed such a scale for leaf bud development in rabbiteye blueberry (Vaccinium ashei Reade). Our scale has six stages briefly described as follows: 1) dormant bud; 2) early green tip; 3) late green tip; 4) unfolding stage; 5) mouse-ear stage; 6) fully opened bud. Categorizing buds in this manner has proven useful in comparing rates of leaf development between cultivars and in response to winter chilling. The stages appear to be relevant to highbush blueberries (V. corymbosum) as well.

scholarly journals Virus Surveys in Olive Orchards in Greece Identify Olive Virus T, a Novel Member of the Genus Tepovirus

Pathogens ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 574
Author(s):  
Evanthia Xylogianni ◽  
Paolo Margaria ◽  
Dennis Knierim ◽  
Kyriaki Sareli ◽  
Stephan Winter ◽  
...  
Keyword(s):  
High Throughput Sequencing ◽  
Leaf Roll ◽  
Virus Infections ◽  
Northern Greece ◽  
Coat Protein Region ◽  
Cherry Leaf Roll Virus ◽  
Leaf Yellowing ◽  
Olive Trees ◽  
Olive Varieties ◽  
Viral Sequences

Field surveys were conducted in Greek olive orchards from 2017 to 2020 to collect information on the sanitary status of the trees. Using a high-throughput sequencing approach, viral sequences were identified in total RNA extracts from several trees and assembled to reconstruct the complete genomes of two isolates of a new viral species of the genus Tepovirus (Betaflexiviridae), for which the name olive virus T (OlVT) is proposed. A reverse transcription–polymerase chain reaction assay was developed which detected OlVT in samples collected in olive growing regions in Central and Northern Greece, showing a virus prevalence of 4.4% in the olive trees screened. Sequences of amplified fragments from the movement–coat protein region of OlVT isolates varied from 75.64% to 99.35%. Three olive varieties (Koroneiki, Arbequina and Frantoio) were infected with OlVT via grafting to confirm a graft-transmissible agent, but virus infections remained latent. In addition, cucumber mosaic virus, olive leaf yellowing-associated virus and cherry leaf roll virus were identified.

scholarly journals Functional Traits of Olive Varieties and Their Relationship with the Tolerance Level towards Verticillium Wilt

Plants ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1079
Author(s):  
Martina Cardoni ◽  
Jesús Mercado-Blanco ◽  
Rafael Villar
Keyword(s):  
Functional Traits ◽  
Verticillium Wilt ◽  
Dry Matter ◽  
Lignin Content ◽  
Root System Architecture ◽  
Root Diameter ◽  
Matter Content ◽  
Dry Matter Content ◽  
Tolerance Level ◽  
Olive Varieties

Verticillium wilt of olive (VWO), caused by the soil-borne pathogen Verticillium dahliae, is considered one of the most important diseases affecting this tree crop. One of the best VWO management measures is the use of tolerant cultivars. Remarkably, no information is available about olive functional traits and their potential relationship with tolerance to V. dahliae. Twenty-five selected functional traits (for leaf, stem, root and whole plant) were evaluated in six olive varieties differing in their VWO tolerance level to identify possible links between this phenotype and functional traits’ variation. High intervarietal diversity was found among cultivars and several functional traits were related with VWO tolerance. Tolerant varieties showed higher leaf area, dry matter content (leaf, stem and plant) and mass fraction for stems, but lower for leaves. Significant differences were also detected for root functional traits, tolerant cultivars displaying larger fine root diameter and lignin content but smaller specific length and area of thick and fine roots. Correlations were found among functional traits both within varieties and between levels of tolerance/susceptibility to VWO. Associations were observed between biomass allocation, dry matter content and VWO tolerance. The most relevant difference between tolerant and susceptible cultivars was related to root system architecture.

IRRIGATION WITHHOLDING EFFECTS ON OLIVE REPRODUCTIVE BUD DEVELOPMENT FOR CONDITIONS WITH INSUFFICIENT WINTER CHILLING

2014 ◽  
pp. 113-119 ◽  
Author(s):  
F.J. Castillo-Llanque ◽  
H.F. Rapoport ◽  
H. Baumann Samanez
Keyword(s):  
Bud Development ◽  
Winter Chilling

Quantification of bearing habit on the basis of lateral bud growth of seven pear cultivars grown under conditions of inadequate winter chilling in South Africa

2002 ◽  
Vol 95 (3) ◽  
pp. 185-192 ◽  
Author(s):  
Pierre du Plooy ◽  
Gerard Jacobs ◽  
Nigel C. Cook
Keyword(s):  
South Africa ◽  
Lateral Bud ◽  
Bud Growth ◽  
Winter Chilling

scholarly journals Differences in the Activity of Superoxide Dismutase, Polyphenol Oxidase and Cu-Zn Content in the Fruits of Gordal and Manzanilla Olive Varieties

2002 ◽  
Vol 57 (1-2) ◽  
pp. 113-120 ◽  
Author(s):  
Dámaso Hornero-Méndez ◽  
Lourdes Gallardo-Guerrero ◽  
Manuel Jarén-Galán ◽  
María Isabel Mínguez-Mosquera
Keyword(s):  
Superoxide Dismutase ◽  
Polyphenol Oxidase ◽  
Copper Content ◽  
Redox Balance ◽  
Sod Activity ◽  
Activity Peak ◽  
Olive Variety ◽  
Zn Content ◽  
Olive Varieties ◽  
Cu And Zn

Activity of the enzymes superoxide dismutase (SOD) and polyphenol oxidase (PPO) as well as Cu-Zn content have been monitored during the thirteen weeks growth of both Gordal and Manzanilla olive variety fruits. These metalloenzymes, with Cu and Zn in the prostetic group, are involved in controlling the redox balance in the chloroplast environment. The results indicated that, under similar phenological and environmental conditions, there are periodic peaks of SOD activity in both varieties, followed by fluctuations in the copper content of the fruit. This was interpreted as a common and simultaneous response to situations of oxidative stress, and this response was more intense in the variety Gordal. The enzyme PPO showed an activity peak at start of growth and then practically disappeared. Thus, its activity cannot be correlated with situations of stress or with changes of Cu and Zn in the fruit.

scholarly journals Effect of The Date and Concentrations of The IBA on Rooting and Growth of Semi-Hard Wood Cuttings of Two Olive (Olea europaea L.) Varieties

2019 ◽  
Vol 32 ◽  
pp. 59-69
Author(s):  
Nabil M. A. Al-Imam ◽  
Qais Q. Hamid
Keyword(s):  
Landscape Design ◽  
Carbohydrate Content ◽  
Control Treatment ◽  
Subsequent Growth ◽  
College Of Agriculture ◽  
Rooted Cutting ◽  
Olea Europaea L ◽  
Rooting Ability ◽  
Olive Variety ◽  
Olive Varieties

This study was conducted in the plastic house at the Department of Horticulture and Landscape Design - College of Agriculture and Forestry - University of Mosul, Iraq. For the period from 1/2/2013 until 1/8/2013. To study the effect of three dates of cutting collection from 1st  February to 1st April monthly intervals, and soaking the cuttings in four concentrations of IBA solution 0, 2000, 3000, 4000mg.l-1 seconds on the rooting ability and subsequent growth of semi-hard wood cuttings of two olive varieties Gordal Sevillano and Tanche. The results were showed the cuttings were collected on the 1st of March resulted into the highest of rooted cutting, survival %, carbohydrate content, carbohydrate to nitrogen (C/N ratio) in the basal cuttings. Rooting increased proportionately with increasing of IBA concentrations principally the cuttings were soaked in 4000mg.l-1. Gordal Sevillano cuttings gave a significantly increase of rooting and the basal cuttings gave a significantly increased of carbohydrates content than Tanche variety. The best rooting percentage were get from interaction between Gordal Sevillano which  collected on the 1st of March treated with 4000 mg.l-1 were gave 66.67%. Highest rate of survival (80.0%) of control treatment of Tanche olive variety were taken on 1st of February. The highest content of carbohydrate (18.10) were obtained in Gordal Sevillano basal cuttings were taken on 1st of March. Higher percentage of Nitrogen (1.58%) were obtained from interaction between basal cutting of Gordal Sevillano variety. were taken on 1st of March. The highest percentage of C/N ration were got by interaction of Gordal Sevillano which collected on 1st of March.

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