scholarly journals Response of Yield, Growth and Iron Deficiency Chlorosis of 'Santa Maria' Pear Trees on Four Rootstocks

2016 ◽  
Vol 44 (2) ◽  
pp. 563-567 ◽  
Author(s):  
Ali IKINCI ◽  
Ibrahim BOLAT ◽  
Sezai ERCISLI ◽  
Ahmet ESITKEN
Keyword(s):  
Titratable Acidity ◽  
Fruit Weight ◽  
Pyrus Communis ◽  
Cumulative Yield ◽  
Cydonia Oblonga ◽  
Iron Deficiency Chlorosis ◽  
Leaf Chlorophyll ◽  
Pyrus Communis L ◽  
Pear Trees ◽  
Santa Maria

This study was conducted on the 'Santa Maria' pear (Pyrus communis L.) budded on various rootstocks [pear seedling (Pyrus communis L.) and quince (Cydonia oblonga Mill.) (BA 29, QA and QC) rootstocks] under calcareous soil and semi-arid conditions during 2004-2012. The results showed that the highest cumulative yield per ha (53.1 t ha-1), fruit weight (304.1 g), fruit volume (337.2 cm³), fruit flesh firmness (22.3 lb.) and titratable acidity (0.21%) was obtained from trees on BA 29 rootstock. The highest SSC (15.8 %), cumulative yield per tree (78.08 kg tree-1), TCSA (79.03 cm²) and the lowest titratable acidity (0.18 %) were obtained from pear seedling. The most vigorous trees were grown on pear seedling, followed by 'BA 29', 'QA' and 'QC' rootstocks. The 'Santa Maria' pear variety's leaf chlorophyll content on all rootstocks fell during the study period up to 60 DAFB compared with 30 DAFB. It was found that leaf chlorophyll and Fe contents were higher in trees on pear seedling and BA 29 rootstocks and lower in those on 'QA'.

Shoot growth control of pear trees (Pyrus communis L.) with prohexadione-calcium

2005 ◽  
Vol 106 (4) ◽  
pp. 515-529 ◽  
Author(s):  
M. Smit ◽  
J.J. Meintjes ◽  
G. Jacobs ◽  
P.J.C. Stassen ◽  
K.I. Theron
Keyword(s):  
Shoot Growth ◽  
Growth Control ◽  
Pyrus Communis ◽  
Pyrus Communis L ◽  
Pear Trees ◽  
Prohexadione Calcium

Early proteomic changes in pear (Pyrus communis L.) calli induced by co-culture on microcallus suspension of incompatible quince (Cydonia oblonga Mill.)

2015 ◽  
Vol 194 ◽  
pp. 337-343 ◽  
Author(s):  
Bhakti Prinsi ◽  
Stefano Musacchi ◽  
Sara Serra ◽  
Gian Attilio Sacchi ◽  
Luca Espen
Keyword(s):  
Pyrus Communis ◽  
Cydonia Oblonga ◽  
Pyrus Communis L

scholarly journals Early Performance of 'Conference' Pear on Four Training Systems

HortScience ◽  
2001 ◽  
Vol 36 (1) ◽  
pp. 69-71 ◽  
Author(s):  
Frank Kappel ◽  
Rob Brownlee
Keyword(s):  
Early Growth ◽  
Fruit Weight ◽  
Light Interception ◽  
Pyrus Communis ◽  
The Other ◽  
Cydonia Oblonga ◽  
Crop Load ◽  
Training Systems ◽  
Slender Spindle ◽  
Early Performance

To determine how different training systems affected early growth and fruiting (first 5 years), `Conference' pear (Pyrus communis L.) trees on Quince A (Cydonia oblonga L.) rootstock were trained to angled trellis, slender spindle, vertical axe, or Y-trellis. The trees of the Y-trellis had the greatest spread after 5 years, and the vertical axe and slender spindle trees were the tallest. The Y-trellis trees had the highest light interception and had significantly higher yields in 1997 than the other training systems. Average fruit weight was inversely related to crop load.

scholarly journals Cultivares e portaenxertos sobre o vigor de plantas de pereira europeias

2013 ◽  
Vol 43 (9) ◽  
pp. 1542-1545 ◽  
Author(s):  
Bruno Dalazen Machado ◽  
Leo Rufato ◽  
Amauri Bogo ◽  
Aike Anneliese Kretzschmar ◽  
André Emmel Mario
Keyword(s):  
Pyrus Communis ◽  
Cydonia Oblonga ◽  
Santa Catarina ◽  
Santa Maria

A cultura da pereira (Pyrus communis) possui grande potencial de expansão no sul do Brasil devido às condições climáticas e solo. A carência de informações a respeito da(s) melhor(es) combinação(ões) de cultivares copa de pereira europeia e portaenxertos, quanto ao aspecto vegetativo e potencial produtivo, tem limitado o cultivo. O objetivo do trabalho foi avaliar a influência de cultivares copa de pereira europeia e portaenxertos de marmeleiro (Cydonia oblonga) sobre o vigor e variáveis de plantas. Os experimentos foram conduzidos em pomares comerciais da cidade de Fraiburgo, Estado de Santa Catarina, durante os ciclos de cultivo 2008/09, 09/10 e 10/11. As cultivares avaliadas foram 'Packham's Triumph', 'Santa Maria', 'Rocha' e 'Abbè Fetel' e os portaenxertos de marmeleiro EMC e Adams. O espaçamento de plantio foi de 0,3m entre plantas e 4m entre linhas. As variáveis analisadas foram: a. incremento de altura de plantas (m); b. incremento de volume de copa (m³); c. incremento de diâmetro do tronco da cv. 'copa' (mm); d. incremento de diâmetro do tronco do portaenxerto (mm); e. diferença de diâmetro do tronco entre a cultivar copa e o portaenxerto (mm); f. índice de fertilidade (no de gemas cm-1); g. massa fresca média total acumulada do material vegetativo das três podas de inverno (kg); h. diferença cumulativa entre a massa fresca e a massa seca dos ramos podados (kg). As diferentes combinações de cultivares e portaenxertos interferiram nas diferentes variáveis analisadas. As combinações Abbè Fetel e Rocha sobre marmelo Adams, foram significativamente mais vigorosas em termos de incremento de diâmetro do tronco da cultivar copa, incremento de altura de plantas, incremento de volume de copa e massa fresca média total acumulada do material vegetativo das podas de inverno dos três anos. A combinação Santa Maria sobre marmelo Adams apresentou vigor intermediário significativo de plantas de acordo com o incremento em volume de copa, diferença de diâmetro do tronco entre a cultivar copa e do portaenxerto, sendo mais indicada para uso comercial, devido ao maior equilíbrio proporcionado entre parte vegetativa e produtiva da planta, nas condições edafoclimáticas experimentais do Sul do Brasil.

scholarly journals Ripening Behavior of `Columbia' and `Gebhard' Strains of Red `d'Anjou' Pears after Cold Storage

1993 ◽  
Vol 118 (1) ◽  
pp. 81-85 ◽  
Author(s):  
Paul M. Chen ◽  
Diane M. Varga ◽  
Eugene A. Mielke
Keyword(s):  
Carboxylic Acid ◽  
Cold Storage ◽  
Titratable Acidity ◽  
Pyrus Communis ◽  
Soluble Solids ◽  
Pyrus Communis L ◽  
Apparent Reduction ◽  
Acc Content

`Columbia' and `Gebhard' strains of red `d'Anjou' pears (Pyrus Communis L.) harvested at similar maturity exhibited different ripening behavior after monthly removal from 1C storage in air. `Columbia' fruit produced ethylene at higher rates than `Gebhard' fruit during 15 days of ripening at 20C after each corresponding storage interval, `Gebhard' fruit required a longer period of chilling than `Columbia' fruit to generate noticeable rates of ethylene during ripening. The unripened fruit of both strains contained similar amounts of ACC at each corresponding storage interval. At each corresponding ripened state, ACC content in `Columbia' fruit increased 2 to 3-fold, while that in `Gebhard' fruit changed very little. After sufficient chilling, `Columbia' fruit were capable of softening to proper ripeness, and they developed buttery and juicy texture as indicated by the apparent reduction of extractable juice (EJ) content. `Gebhard' fruit also softened but to a lesser extent than `Columbia' fruit. Ripened `Gebhard' fruit had only slightly lower levels of EJ than unripened fruit and did not develop a buttery and juicy texture after any storage intervals. Titratable acidity (TA) in fruit of both strains varied between for the 1988 and 1989 seasons but decreased significantly during storage in both years. Soluble solids concentrations (SSC) in both strains also varied seasonally but did not change during storage or ripening. Chemical name used: 1-aminocyclopropane-1-carboxylic acid (ACC).

In-row Vegetation-free Strip Width Effect on Established ‘Navaho’ Blackberry

2017 ◽  
Vol 32 (1) ◽  
pp. 85-89 ◽  
Author(s):  
Nicholas T. Basinger ◽  
Katherine M. Jennings ◽  
David W. Monks ◽  
Wayne E. Mitchem ◽  
Penelope M. Perkins-Veazie ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Growth Yield ◽  
Titratable Acidity ◽  
Fruit Weight ◽  
Strip Width ◽  
Soluble Solids ◽  
Cumulative Yield ◽  
Current Recommendation ◽  
Berry Weight ◽  
Berry Quality

AbstractA field study was conducted in 2014 and 2015 in an established 5-yr old commercial blackberry planting to determine the effect of vegetation-free strip width (VFSW) on ‘Navaho’ blackberry vegetative growth, yield and fruit quality parameters, identify the optimum VFSW for blackberry plantings in the southeastern USA, and provide practical groundcover management recommendations that can increase the productivity of blackberry plantings. In Fall 2013, tall fescue was seeded in-row and allowed to establish. In Spring 2014, VFSW treatments (0, 0.6, 0.9, 1.2, and 1.8 m) were established in a randomized complete block statistical design with four replications. Blackberry growth measurements included primocane and floricane number, cane diam, individual fruit weight and yield. Fruit quality measurements included, soluble solids concentration (SSC), titratable acidity (TA) and pH. Primocane number increased with increasing VFSW in both years. Floricane number increased with increasing VFSW in 2014. Primocane diam decreased with increasing VFSW in 2014 but had a quadratic response in 2015. Berry weight and cumulative yield increased with increasing VFSW in both years. The only berry quality component affected by VFSW was pH, which decreased as VFSW increased. Results indicate that widening the VFSW in blackberry from the current recommendation of 1.2 m to 1.8 m could provide growers a means to increase plant growth, berry weight, and cumulative yield blackberry of a planting.

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