scholarly journals Mature Sweet Cherries Have Low Turgor

2014 ◽  
Vol 139 (1) ◽  
pp. 3-12 ◽  
Author(s):  
Moritz Knoche ◽  
Eckhard Grimm ◽  
Henrik Jürgen Schlegel
Keyword(s):  
Water Potential ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
Sour Cherry ◽  
Vaccinium Corymbosum ◽  
Pressure Probe ◽  
Tissue Water ◽  
Black Currant ◽  
Tissue Pressure ◽  
Order Of Magnitude

The pressure inside a mature sweet cherry (Prunus avium L.) fruit is thought to be an important factor in rain cracking. However, to our knowledge, this pressure has never been quantified directly. The objectives of this study are to quantify: 1) the cell turgor () in fruit using a cell pressure probe (CPP) and a vapor pressure osmometer (VPO); and 2) the tissue pressure in a fruit () using both a fruit pressure probe (FPP) and a compression-plate technique (CP). The value of in mesocarp cells of mature sweet cherry fruit averaged 28.1 kPa in ‘Samba’ and 17.5 kPa in ‘Sam’ at depths below the fruit surface between 200 and 400 μm. A (range 38 to 64 kPa for different cultivars) calculated from the tissue water potential ( = –2968 to –4035 kPa) and the osmotic potential () ( = –3020 to –4116 kPa) of excised mesocarp discs as determined by VPO was of the same order of magnitude as that by CPP. Similar low values were obtained by FPP (range 8.0 to 11.8 kPa across cultivars). The were consistently lower than the values measured by CPP or by VPO. The value in the mesocarp increased slightly with increasing depth below the surface. However, was always negligible (e.g., ‘Samba’ = 10 kPa) compared with either (‘Samba’ = –2395 kPa) or calculated water potential () (‘Samba’ = –2385 kPa). When subjecting intact fruit to CP, linear relationships were obtained between the forces applied and the resulting aplanation areas. The values obtained by CP (range in sweet cherry 18.4 to 36.1 kPa) were somewhat larger than the values obtained by FPP (range in sweet cherry 8.0 to 11.8 kPa). Incubating fruit for up to 7.5 h in deionized water or for up to 96 h in air enclosed above dry silica gel had no measurable effects on . The low and the low values are not unique to sweet cherry. Values of the same order of magnitude were obtained also in mature sour cherry (Prunus cerasus L.), european plum (Prunus domestica L.), grape (Vitis vinifera L.), gooseberry (Ribes uva-crispa L.), red currant (Ribes rubrum L.), black currant (Ribes nigrum L.), blueberry (Vaccinium corymbosum L.), and tomato (Solanum lycopersicum L.). Possible explanations for the very low values of and are discussed.

scholarly journals Water Potential and Its Components in Developing Sweet Cherry

2014 ◽  
Vol 139 (4) ◽  
pp. 349-355 ◽  
Author(s):  
Christine Schumann ◽  
Henrik Jürgen Schlegel ◽  
Eckhard Grimm ◽  
Moritz Knoche ◽  
Alexander Lang
Keyword(s):  
Water Potential ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
Stage Iii ◽  
Pressure Probe ◽  
Vapor Pressure Osmometry ◽  
Tissue Water ◽  
Tissue Pressure ◽  
Formula One ◽  
Fruit Skin

Susceptibility of sweet cherry (Prunus avium L.) fruit to rain cracking increases toward maturity and is thought to be related to increases in both tissue pressure () and cell pressure (). Furthermore, at a given water potential (), one might expect the increase in and the to balance the decrease in osmotic potential (). The objectives of our study were to quantify and in developing sweet cherry using vapor pressure osmometry (VPO), compression plate (CP), and the cell pressure probe (CPP). In addition, the tissue water potential was determined by quantifying the bending of strips of fruit skin and the change in projected area of discs excised from the flesh when incubated in a range of sucrose solutions of varying osmotic potentials (). Fruit growth followed a sigmoid pattern with time with the Stage II/Stage III transition occurring at ≈55 days after full bloom (DAFB). The and the were constant up to ≈55 DAFB but decreased to –2.8 MPa at maturity. The calculated by subtracting the from averaged ≈350 kPa up to 48 DAFB and then decreased at a decreasing rate to ≈21 kPa toward maturity. The determined from bending assays using excised skin strips or from water uptake of excised flesh discs was essentially constant up to ≈48 DAFB, then decreased until ≈75 DAFB and remained constant thereafter. These values were in good agreement with those determined by VPO. The as determined by CP passed through a transient peak at ≈41 DAFB, then decreased until ≈63 DAFB and remained constant and low until maturity. Similarly, by CPP increased from 27 to 48 DAFB, remained constant until ≈55 DAFB, and then decreased until maturity. Our data demonstrate a consistent decrease in and that coincides with a decrease in of sweet cherry during Stage III. Because and are low relative to , the change in parallels that in . The reason for the low turgor most likely lies in the accumulation of apoplastic solutes. These prevent a catastrophic increase in pressure that would otherwise lead to the bursting of individual cells and the cracking of entire fruit.

scholarly journals Characterization of sour (Prunus cerasus L.) and sweet cherry (Prunus avium L.) varieties with five isozyme systems

2008 ◽  
Vol 30 (1) ◽  
pp. 154-158 ◽  
Author(s):  
Remedios Morales Corts ◽  
Luciano Cordeiro Rodrigues ◽  
Jesús Maria Ortíz Marcide ◽  
Rodrigo Pérez Sánches
Keyword(s):  
Sweet Cherry ◽  
Prunus Avium ◽  
Germplasm Collection ◽  
Sour Cherry ◽  
Morphological Characterization ◽  
Prunus Cerasus ◽  
Discrimination Power ◽  
Young Leaves ◽  
Synonymies And Homonymies ◽  
Prunus Avium L

Extracts from young leaves of nine sweet cherry (Prunus avium L.) and eight sour cherry (Prunus cerasus L.) varieties, located in the germplasm collection of the 'Direção Regional de Agricultura da Beira Interior' (Fundão, Portugal), were analysed for five isozyme systems in order to characterise these varieties and detect problems of synonymies and homonymies that frequently present. The sweet and sour cherry varieties analyzed showed low isoenzymatic polymorphism, being PGM and PGI the systems with the highest discrimination power. These systems presented seven and five different zymogrames, respectively. IDH showed four patterns. SKDH and 6-PGD grouped the varieties only into two patterns. The evident and discriminant restrictions of this type of analysis had got results that have only been a complement for agronomical and morphological characterization.

scholarly journals Intermittent CaCl2 Sprays during Rain to Prevent Sweet Cherry Cracking

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 793F-793 ◽  
Author(s):  
R. Thomas Fernandez ◽  
James A. Flore
Keyword(s):  
Water Potential ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
Irrigation System ◽  
Potential Gradient ◽  
Daily Rainfall ◽  
Controlled Irrigation ◽  
Computer Controlled ◽  
Water Potential Gradient ◽  
Rain Events

Fruit of sweet cherry (Prunus avium L.) crack during or after rain due, in part, to absorption of water through the fruit surface driven by the water potential gradient. In 1972, J. Vittrup-Christensen suggested that overhead misting of calcium salts during precipitation may be an effective way to prevent cherry cracking by reducing the water potential gradient. We tested this hypothesis by designing a computer-controlled irrigation system to intermittently spray a 10% CaCl2 solution on trees during rain events. Spray emitters were placed in the middle and at the top of the canopy. The program turned the system on for 90 s at each 0.3 mm of rain and monitored daily rainfall and accumulated mist times. Two `Emperor Francis' and two `Ulster' were treated with equal number of controls. Intact and cracked cherries were counted on four branches per tree at three times when cherries were susceptible to cracking. Overall, cracking was reduced from 33% to 11% by the CaCl2 spray at the end of the experiment. Treated `Ulster' had 9% cracked fruit, while control had 43% cracked fruit. Differences for `Emperor Francis' were not significant. Phytotoxicity was estimated at about 15 % of leaf area. This system will be reevaluated in 1995 with the added objective of quantifying and reducing phytotoxicity.

scholarly journals Elaboration of novel extraction procedure to reveal bioactive component profile of anthocyanin-rich plants 

2014 ◽  
Vol 32 (No. 4) ◽  
pp. 384-390
Author(s):  
A. Kiss ◽  
S. Rapi ◽  
M. Korozs ◽  
P. Forgo
Keyword(s):  
Antioxidant Activity ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
Phenolic Content ◽  
Extraction Procedure ◽  
Hplc Method ◽  
Hot Water ◽  
Anthocyanin Content ◽  
Black Currant ◽  
Dpph Method

The content of anthocyanin derivatives, antioxidant activity, and phenolic content were determined in black elderberry (Sambucus nigra L.), sweet cherry (Prunus avium L.), blackberry (Rubus fruticosus L.), black currant (Ribes nigrum L.), and blackthorn (Prunus Spinosa L.). The extraction efficiency was examined of several solvents including hot water, 2% phosphoric acid, ethanol and acetone. A new sequential (cascade) extraction procedure was developed in order to improve the efficiency of the conventional methods. This novel extraction protocol consists of 3 different steps with the prevalence of low pH extraction conditions. When comparing the effectiveness of the conventional and presently improved procedures, it was stated that significantly increased anthocyanin yields had been observed. The highest anthocyanin content, determined with HPLC method, was found in the case of sweet cherry (222.7 mg/kg) on using the three step extraction procedure. The highest antioxidant activity determined with DPPH method was also assigned to the sweet cherry sample (5272 mg/kg). The highest phenolic content was found in blackberry (434 mg/kg).

scholarly journals Analysis of Double-Stranded RNAs from Cherry Trees with Stem Pitting in California

Plant Disease ◽  
1998 ◽  
Vol 82 (8) ◽  
pp. 871-874 ◽  
Author(s):  
Yun-Ping Zhang ◽  
J. K. Uyemoto ◽  
B. C. Kirkpatrick
Keyword(s):  
Sweet Cherry ◽  
Prunus Avium ◽  
Sour Cherry ◽  
Rt Pcr ◽  
Cloning And Sequencing ◽  
Green Ring ◽  
Flowering Cherry ◽  
Polymerase Chain ◽  
Stem Pitting ◽  
Dsrna Species

Five distinct dsRNA species were recovered from Bing sweet cherry (Prunus avium (L.) L.) trees with stem pitting symptoms. A 4.7-kilobase pair (kbp) dsRNA was isolated from mahaleb rootstock (P. mahaleb L.); an unrelated 4.7-kbp dsRNA, always co-purified with a 1.3-kbp dsRNA, and a 9-kbp dsRNA were from Bing cherry. In addition, an 8.5-kbp dsRNA found in diseased Shirofugen flowering cherry and in Bing cherry was identified as sour cherry green ring mottle virus (CGRMV). The larger, 8.5- and 9.0-kbp dsRNA species were graft-transmissible, while the smaller ones were non-transmissible and appeared cryptic in nature. Reverse transcription-polymerase chain reaction (RT-PCR) assays were developed for each dsRNA species by cloning and sequencing cDNA synthesized from the dsRNA templates. When several diseased collections were assayed by RT-PCR, approximately 14% reacted positively with primers for the 9.0-kbp dsRNA or CGRMV. Although CGRMV and the 9.0-kbp dsRNA caused wood-marking symptoms in graft-inoculated Mazzard (P. avium) seedling trees, no xylem or canopy symptoms developed in grafted Bing cherry. The causal agent or agents of cherry stem pitting have not been identified.

Susceptibility of sweet and sour cherry cultivars/genotypes to feeding damage caused by Bryobia rubrioculus (Acari: Tetranychidae)

2018 ◽  
Vol 23 (1) ◽  
pp. 78
Author(s):  
Nazila Honarparvar ◽  
Mohammad Khanjani ◽  
Rostislav Zemek ◽  
Naser Bouzari
Keyword(s):  
Sweet Cherry ◽  
Prunus Avium ◽  
Sour Cherry ◽  
Fruit Trees ◽  
Mean Value ◽  
White Background ◽  
Analysis Technique ◽  
The Mean ◽  
Color Scanner ◽  
Area Percentage

The sweet cherry Prunus avium L. and sour cherry Prunus cerasus L. are considered important fruit trees, providing valuable and delicious fruit worldwide. We compared the susceptibility of 10 cultivars of sweet cherry and 5 genotypes of sour cherry to Bryobia rubrioculus Scheuten feeding by manually counting brown spots and by measuring damaged leaf area using a computerized image analysis technique. Damaged leaves were individually scanned on a common flatbed color scanner on a white background. The cultivars and genotypes of sweet and sour cherries, based on the mean area percentage having feeding symptoms on the leaves, were classified into three groups: (1) "susceptible", i.e., Hamedan, BN 5150, BT 5148, Zard-90, KB 9 and KB 10; (2) "semi-resistant", i.e., KB 21, Sabima, BT 5124, KB 25 and Lambert; and (3) "resistant", i.e., Haj Yousefi, BO 5187, BT 5154 and Siah Mashhad. A corresponding increase in the mean value of the symptom area was observed as the number of adult brown mites increased per disc. The results of both methods were compared, and the advantages of each method were discussed.

scholarly journals Pomological and phytochemical evaluation of different cherry species: mahaleb (Prunus mahaleb L.), wild sweet cherry (Prunus avium L.) and wild sour cherry (Prunus cerasus L.), sweet and sour cherry cultivars

2019 ◽  
Vol 18 (4) ◽  
pp. 181-191
Author(s):  
Fırat Ege Karaat ◽  
Kazim Gündüz ◽  
Onur Saraçoğlu ◽  
Hakan Yıldırım
Keyword(s):  
Antioxidant Capacity ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
Principal Component ◽  
Sour Cherry ◽  
Prunus Cerasus ◽  
Total Weight ◽  
Sweet Cherries ◽  
Prunus Mahaleb ◽  
Prunus Avium L

Cherries are known as health friendly fruits due to their abundant phytochemical compositions. This study was conducted to determine phytochemical and pomological fruit properties of different cherry species including mahaleb (Prunus mahaleb L.), wild sweet cherry (Prunus avium L.), wild sour cherry (Prunus cerasus L.), two sweet cherries (‘Napoleon’ and ‘Starks Gold’) and one sour cherry (‘Kütahya’) cultivars. For this aim, together with various pomological traits, total phenolics and anthocyanin contents, antioxidant capacity, organic acids, sugars, were analyzed in fruits of relevant genotypes. Results of all examined traits significantly varied between genotypes. Mahaleb showed the highest TSS (30.17%), fructose (8.71 μg/g) and glucose (20.74 μg/g) contents. Wild sour cherry gave the highest antioxidant capacity (13.25 mmol TE/kg total weight), anthocyanin (351.0 mg Pg-3-glk/kg total weight), citric acid (0.56 μg/g) and malic acid (2.96 μg/g) contents. As a rootstock, mahaleb was found to be superior in some of the traits when compared to wild sweet cherry. Significant correlations were observed between various traits. Additionally, principal component analysis (PCA) revealed different relationships among the traits and evaluated genotypes.

Rhagoletis cingulata. [Distribution map].

2015 ◽  
Author(s):  
Keyword(s):  
New York ◽  
Czech Republic ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
District Of Columbia ◽  
Sour Cherry ◽  
Black Cherry ◽  
Distribution Map ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Rhagoletis cingulata (Loew). Diptera: Tephritidae. Hosts: sweet cherry (Prunus avium), sour cherry (P. cerasus), mahaleb cherry (P. mahaleb) and black cherry (P. serotina). Information is given on the geographical distribution in Europe (Austria, Belgium, Croatia, Czech Republic, France, Germany, Hungary, Netherlands, Slovenia and Switzerland) and North America (Canada, Ontario, Quebec, Saskatchewan, Mexico, USA, Arizona, Connecticut, District of Columbia, Florida, Georgia, Illinois, Indiana, Iowa, Louisiana, Maryland, Massachusetts, Michigan, Mississippi, New Jersey, New York, Ohio, Pennsylvania, Tennessee, Texas, Virginia, and Wisconsin).

Rhagoletis cingulata. [Distribution map].

2009 ◽  
Author(s):  
Keyword(s):  
New York ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
District Of Columbia ◽  
Sour Cherry ◽  
Distribution Map ◽  
Prunus Virginiana ◽  
Prunus Mahaleb ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Rhagoletis cingulata (Loew). Diptera: Tephritidae. Hosts: sweet cherry (Prunus avium), sour cherry (Prunus cerasus), mahaleb cherry (Prunus mahaleb), black cherry (Prunus serotina) and common chokecherry (Prunus virginiana). Information is given on the geographical distribution in Europe (Croatia, Germany, Hungary, the Netherlands, Slovenia and Switzerland) and North America (Nova Scotia, Ontario, Quebec and Saskatchewan, Canada; Mexico; and Arizona, Connecticut, District of Columbia, Florida, Georgia, Illinois, Indiana, Iowa, Louisiana, Maryland, Massachusetts, Michigan, Mississippi, New Jersey, New York, Ohio, Pennsylvania, Tennessee, Texas, Virginia and Wisconsin, USA).

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