4: Morphological characteristics of yeast strain isolated from different fruit
juices
Source Yeast strains Surface Margin Colour Cells
Apple Juice FJ1 smooth circular Creamy white Oval
Apple Juice FJ2 smooth Circular Creamy white Spherical
Pineapple juice FJ3 smooth Circular White Round
Pineapple juice FJ4 rough Circular Creamy white Oval
Mango juice FJ5 smooth Circular Creamy white Round
Mango juice FJ6 rough Circular Creamy white Round
Sugarcane juice FJ7 smooth irregular Pinkish white Spherical
Sugarcane juice FJ8 smooth circular Creamy white Round
Sugarcane juice FJ9 smooth circular Creamy white Ellipsoidal
Sugarcane juice FJ10 rough irregular Creamy white Round
Sugarcane juice FJ11 smooth circular Creamy white Ellipsoidal
Sugarcane juice FJ12 Smooth circular Pinkish Round
Sugarcane juice FJ13 Rough irregular Yellow white Round
Musambi juice FJ14 Smooth circular White Oval
Musambi juice FJ15 Smooth circular Creamy white Spherical
Grape juice FJ16 Rough irregular Pinkish Oval
Grape juice FJ17 smooth circular Creamy white Round
Orange juice FJ18 rough circular Light pink Oval
Orange juice FJ19 rough circular Pinkish Round
Jaggery JG1 smooth circular Creamy white Ellipsoidal
Jaggery JG2 rough irregular White Ellipsoidal
Int. J. Chem. Sci.: 9(2), 2011 653
Table 5: Biochemical analysis of the yeast strain isolated from different fruit juices and
jaggery
Carbon sources
Strains Glucose Fructose Maltose Sucrose Urea Peptone
Gr Alc Gr Alc Gr Alc Gr Alc Gr Alc Gr Alc
FJ1 + + + + + + ++ ++ ++ ++ + +
FJ2 + + + + + + + + + + + +
FJ3 ++ ++ ++ ++ ++ ++ + + + + + +
FJ4 ++ ++ ++ ++ ++ ++ ++ ++ + + + +
FJ5 ++ ++ + + + + + + + + + +
FJ6 ++ ++ ++ ++ + + + + + + + +
FJ7 ++ ++ + + + + + + + + + +
FJ8 ++ ++ + + + + + + + + + +
FJ9 ++ ++ ++ ++ + + + + + + + +
FJ10 ++ ++ ++ ++ + + + + + + + +
FJ11 ++ ++ ++ ++ + + + + + + + +
FJ12 ++ ++ ++ ++ + + + + + + + +
FJ13 ++ ++ ++ ++ + + + + + + + +
FJ14 ++ ++ +++ +++ +++ +++ ++ ++ + + + +
FJ15 ++ ++ ++ ++ + + + + + + + +
FJ16 +++ +++ +++ +++ +++ +++ ++ +++ ++ ++ ++ ++
FJ17 +++ +++ +++ +++ ++ ++ ++ ++ ++ + + +
FJ18 ++ ++ ++ ++ + + ++ ++ + + + +
FJ19 ++ ++ ++ ++ + + ++ ++ + + + +
JG1 ++ + +++ +++ ++ + + ++ + + + +
JG2 ++ + +++ ++ ++ ++ + ++ ++ + + +
Alc.: Alcohol production; Gr.: Growth; +: moderate; ++: very good; +++: extremely good.
S. Chatterjee et 654 al.: Isolation and Characterization of….
The physiological researches of each yeasts strain were carried out by using over 5
tests for assimilation of carbon and their catalase activity (Table 6 & 7). The utilization of
four polysaccharides namely carboxy methyl cellulose (CMC), starch, xylan and pectin was
tested. All the strains isolated were found to assimilate the named polysaccharides and
produce detectable amount of extra cellular cellulase, amylase, xylanase and pectinase
respectively. Moreover, the strains also exhibited catalase ability of various degrees.
The present study dealing with the isolation and characterization of about thirty
three yeast strains with interesting features such as extra cellular enzyme and alcohol
production would facilitate the opportunity for identification of the yeasts. The result of this
study indicated that most of the indigenous yeasts, isolated from dahi and juice samples
showed good fermentation attributes, which might enhance ethanol yield that would
contribute for the cost effective role in the production of bioalcohol and enzymes of
industrial importance.
Table 6: Physiological characteristics of the yeast strains isolated from dahi
Assimilation
Strains
CMC Xylan Pectin Starch
Catalase
activity
D1 ++ + + + +
D2 + ++ + ++ ++
D3 + + + + +
D4 + + + + +
D5 ++ ++ + ++ ++
D6 + + + ++ +
D7 + + + + +
D8 ++ + + + ++
D9 + + ++ + +
D10 ++ + + + +
D11 + ++ + ++ +
D12 + + ++ + ++
+ = Growth on the respective plate
Int. J. Chem. Sci.: 9(2), 2011 655
Table 7: Physiological characteristics of the yeast strains isolated from different fruit
juices & jaggery
Assimilation
Strains
CMC Xylan Pectin Starch
Catalase
Activity
FJ1 + + ++ + +
FJ2 + + + + +
FJ3 ++ + + ++ ++
FJ4 + ++ + + +
FJ5 + + + + +
FJ6 ++ + + ++ ++
FJ7 + + + + +
FJ8 ++ + + + +
FJ9 + + + + +
FJ10 + ++ + ++ ++
FJ11 + + + + +
FJ12 ++ + ++ + +
FJ13 + + + + +
FJ14 ++ + + + +
FJ15 + ++ + + +
FJ16 ++ ++ + ++ ++
FJ17 + + + + +
FJ18 ++ + ++ + ++
FJ19 + + + + +
JG1 ++ + + ++ +
JG2 + + + + +
+ = Growth on the respective plate
4: Morphological characteristics of yeast strain isolated from different fruit
juices
Source Yeast strains Surface Margin Colour Cells
Apple Juice FJ1 smooth circular Creamy white Oval
Apple Juice FJ2 smooth Circular Creamy white Spherical
Pineapple juice FJ3 smooth Circular White Round
Pineapple juice FJ4 rough Circular Creamy white Oval
Mango juice FJ5 smooth Circular Creamy white Round
Mango juice FJ6 rough Circular Creamy white Round
Sugarcane juice FJ7 smooth irregular Pinkish white Spherical
Sugarcane juice FJ8 smooth circular Creamy white Round
Sugarcane juice FJ9 smooth circular Creamy white Ellipsoidal
Sugarcane juice FJ10 rough irregular Creamy white Round
Sugarcane juice FJ11 smooth circular Creamy white Ellipsoidal
Sugarcane juice FJ12 Smooth circular Pinkish Round
Sugarcane juice FJ13 Rough irregular Yellow white Round
Musambi juice FJ14 Smooth circular White Oval
Musambi juice FJ15 Smooth circular Creamy white Spherical
Grape juice FJ16 Rough irregular Pinkish Oval
Grape juice FJ17 smooth circular Creamy white Round
Orange juice FJ18 rough circular Light pink Oval
Orange juice FJ19 rough circular Pinkish Round
Jaggery JG1 smooth circular Creamy white Ellipsoidal
Jaggery JG2 rough irregular White Ellipsoidal
Int. J. Chem. Sci.: 9(2), 2011 653
Table 5: Biochemical analysis of the yeast strain isolated from different fruit juices and
jaggery
Carbon sources
Strains Glucose Fructose Maltose Sucrose Urea Peptone
Gr Alc Gr Alc Gr Alc Gr Alc Gr Alc Gr Alc
FJ1 + + + + + + ++ ++ ++ ++ + +
FJ2 + + + + + + + + + + + +
FJ3 ++ ++ ++ ++ ++ ++ + + + + + +
FJ4 ++ ++ ++ ++ ++ ++ ++ ++ + + + +
FJ5 ++ ++ + + + + + + + + + +
FJ6 ++ ++ ++ ++ + + + + + + + +
FJ7 ++ ++ + + + + + + + + + +
FJ8 ++ ++ + + + + + + + + + +
FJ9 ++ ++ ++ ++ + + + + + + + +
FJ10 ++ ++ ++ ++ + + + + + + + +
FJ11 ++ ++ ++ ++ + + + + + + + +
FJ12 ++ ++ ++ ++ + + + + + + + +
FJ13 ++ ++ ++ ++ + + + + + + + +
FJ14 ++ ++ +++ +++ +++ +++ ++ ++ + + + +
FJ15 ++ ++ ++ ++ + + + + + + + +
FJ16 +++ +++ +++ +++ +++ +++ ++ +++ ++ ++ ++ ++
FJ17 +++ +++ +++ +++ ++ ++ ++ ++ ++ + + +
FJ18 ++ ++ ++ ++ + + ++ ++ + + + +
FJ19 ++ ++ ++ ++ + + ++ ++ + + + +
JG1 ++ + +++ +++ ++ + + ++ + + + +
JG2 ++ + +++ ++ ++ ++ + ++ ++ + + +
Alc.: Alcohol production; Gr.: Growth; +: moderate; ++: very good; +++: extremely good.
S. Chatterjee et 654 al.: Isolation and Characterization of….
The physiological researches of each yeasts strain were carried out by using over 5
tests for assimilation of carbon and their catalase activity (Table 6 & 7). The utilization of
four polysaccharides namely carboxy methyl cellulose (CMC), starch, xylan and pectin was
tested. All the strains isolated were found to assimilate the named polysaccharides and
produce detectable amount of extra cellular cellulase, amylase, xylanase and pectinase
respectively. Moreover, the strains also exhibited catalase ability of various degrees.
The present study dealing with the isolation and characterization of about thirty
three yeast strains with interesting features such as extra cellular enzyme and alcohol
production would facilitate the opportunity for identification of the yeasts. The result of this
study indicated that most of the indigenous yeasts, isolated from dahi and juice samples
showed good fermentation attributes, which might enhance ethanol yield that would
contribute for the cost effective role in the production of bioalcohol and enzymes of
industrial importance.
Table 6: Physiological characteristics of the yeast strains isolated from dahi
Assimilation
Strains
CMC Xylan Pectin Starch
Catalase
activity
D1 ++ + + + +
D2 + ++ + ++ ++
D3 + + + + +
D4 + + + + +
D5 ++ ++ + ++ ++
D6 + + + ++ +
D7 + + + + +
D8 ++ + + + ++
D9 + + ++ + +
D10 ++ + + + +
D11 + ++ + ++ +
D12 + + ++ + ++
+ = Growth on the respective plate
Int. J. Chem. Sci.: 9(2), 2011 655
Table 7: Physiological characteristics of the yeast strains isolated from different fruit
juices & jaggery
Assimilation
Strains
CMC Xylan Pectin Starch
Catalase
Activity
FJ1 + + ++ + +
FJ2 + + + + +
FJ3 ++ + + ++ ++
FJ4 + ++ + + +
FJ5 + + + + +
FJ6 ++ + + ++ ++
FJ7 + + + + +
FJ8 ++ + + + +
FJ9 + + + + +
FJ10 + ++ + ++ ++
FJ11 + + + + +
FJ12 ++ + ++ + +
FJ13 + + + + +
FJ14 ++ + + + +
FJ15 + ++ + + +
FJ16 ++ ++ + ++ ++
FJ17 + + + + +
FJ18 ++ + ++ + ++
FJ19 + + + + +
JG1 ++ + + ++ +
JG2 + + + + +
+ = Growth on the respective plate
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