Effect of exogenous application of gibberellic acid on color change and phenylalanine ammonia-lyase, chlorophyllase, and peroxidase activities during ripening of strawberry fruit (Fragaria x ananassa Duch.)

1996 ◽  
Vol 15 (3) ◽  
pp. 139-146 ◽  
Author(s):  
G. A. Martínez ◽  
A. R. Chaves ◽  
M. C. Añón
Keyword(s):  
Gibberellic Acid ◽  
Phenylalanine Ammonia Lyase ◽  
Color Change ◽  
Fragaria X Ananassa ◽  
Strawberry Fruit ◽  
Exogenous Application

scholarly journals Activity of Phenylalanine Ammonia-Lyase (PAL) and Concentrations of Anthocyanins and Phenolics in Developing Strawberry Fruit

1991 ◽  
Vol 116 (5) ◽  
pp. 865-869 ◽  
Author(s):  
Guiwen W. Cheng ◽  
Patrick J. Breen
Keyword(s):  
Phenylalanine Ammonia Lyase ◽  
Maximum Level ◽  
Phenylpropanoid Pathway ◽  
Fragaria X Ananassa ◽  
Strawberry Fruit ◽  
Pal Activity ◽  
Soluble Phenols ◽  
Phenolic Substances ◽  
Rapid Drop ◽  
Second Peak

Studies on regulation of production of phenolics in strawberry (Fragaria X ananassa Duch,) fruit were initiated by monitoring phenylalanine ammonia-lyase (PAL) activity and levels of anthocyanins, flavonoids, tannins, and other soluble phenols throughout fruit ontogeny in `Tillikum'. PAL catalyzes the first step in the biosynthesis of phenylpropanoids, which are further modified into a wide variety of phenolic compounds. Peak in PAL activity (1 mol· s-1 = 1 kat) of 90 pkat· mg-1 protein was detected at 5 and 27 days after anthesis (DAA), when fruit was green and nearly ripe, respectively. PAL activity was only ≈10% of peak values in the white berry stage, when. fruit growth was most rapid. The second peak in PAL activity was followed by a rapid drop, to nearly zero in red-ripe fruit at 30 DAA. Total soluble phenols reached a maximum level soon after anthesis, just before the first peak in PAL activity, then declined to a low constant value well in advance of fruit ripening. Similar changes were observed in levels of tannins and flavonoids that, at anthesis, accounted for 44% and 51% of the soluble phenols, respectively. The concentration of anthocyanin was very low throughout most of fruit development, but beginning at 23 DAA it increased from <0.03 to >0.53 mg·g-1 fresh weight in 3 days. This accumulation paralleled the second rise in PAL activity. Accordingly, strawberry fruit have a developmental-dependent expression of PAL activity and accumulation of phenolic substances derived from the phenylpropanoid pathway.

Physical attributes and chemical composition of organic strawberry fruit (Fragaria x ananassa Duch, Cv. Albion) at six stages of ripening

2013 ◽  
Vol 138 (1) ◽  
pp. 372-381 ◽  
Author(s):  
José de Jesús Ornelas-Paz ◽  
Elhadi M. Yahia ◽  
Nidia Ramírez-Bustamante ◽  
Jaime David Pérez-Martínez ◽  
María del Pilar Escalante-Minakata ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Fragaria X Ananassa ◽  
Strawberry Fruit ◽  
Physical Attributes

scholarly journals CROWN DIAMETER, CHILLING, AND GIBBERELLIC ACID INTERACTIONS INFLUENCE GROWTH AND REPRODUCTIVE OF STRAWBERRY CV. FESTIVAL.

2016 ◽  
Vol 47 (2) ◽  
Author(s):  
N. H. Khalil
Keyword(s):  
Gibberellic Acid ◽  
Cold Storage ◽  
Foliar Application ◽  
Block Design ◽  
Fragaria X Ananassa ◽  
Distilled Water ◽  
College Of Agriculture ◽  
Plant Yield ◽  
Crown Diameter ◽  
Randomized Complete Block Design

An experiment was conducted in unheated greenhouse units of the Department of Horticulture and Landscape -College of Agriculture- University of Baghdad on the first of October,   to observe the effects of amony interaction of crown diameter, chilling,  and foliar application of gibberellic acid on vegetative growth, and reproductive in cv. ‘Festival’ of strawberry (Fragaria x ananassa (Duch)). Using randomized Complete Block Design (RCBD), Plants were sorted into two groups according to crown diameter (11-15mm (Cd1)  and  6-10 mm (Cd2)), each of them sorted into two groups [Ch0 (without cold storage) and Ch1 (kept in a cold storage for  three weeks at 1-2°C), gibberellic acid was sprayed on plants, with concentration treatments included a control (G0) (distilled water), 150 mg. L–1 (G1) and 300 mg. L–1 (G2).The results showed the highest leaf number and Leaf area. Plant-1, (26.33), (29.70 dcm2) in (Cd1.Ch1.GA0) and (Cd1.Ch1. GA1) respectively, Number of stolon increased significantly by GAs application, the highest number were (8.3) in (Cd1.Ch1. GA2). The highest value of the TSS % was produced from the plants under the effect of  the treatment (Cd1.Ch1. GA0) (8.5%) and the highest pH were 3.70 from the treatment (Cd2.Ch0.GA2). The results indicated the superiority of treatment (Cd1.Ch0.GA0)     in fruit number (22.4), weight (17.77g) and a plant yield (398.2g).

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