Fig. 5. Changes in lignin content of asparagus stored at 2 ◦C for 35 days. Each data
point is the mean of three replicate samples. Vertical bars represent standard deviation
of means.
the total chlorophyll content of the uncoated green asparagus was
only 30.00 mg/100 g FW. Based on the above results, chitosan coating
exhibited beneficial effect on the reduction of color changes in
asparagus.
3.4. Effect of lignin
Lignin is the cell wall component frequently associated with tissue
hardening and plays an important role in the textural attributes
of asparagus. Fig. 5 represents the lignin content of the different
treatments of samples, expressed in mg of lignin/kg fresh
weight (FW). During storage of asparagus, very rapid increases were
observed in the lignin levels. None of the treatments applied was
able to maintain the lignin levels close to those of the fresh product.
However, H-chitosan and L-chitosan treatments could slow the
rate of increase in this composition levels during the storage, especially
0.25% H-chitosan and 0.50% L-chitosan coated. At the 35th
day, the lignin content of 0.25% H-chitosan and 0.50% L-chitosan
treated sample were 5.06, 5.00 mg/100 g FW, respectively. Whereas
the lignin content of untreated sample was up to 5.86 mg/100 g FW.
The lignification in asparagus is controlled by different enzymes,
among them phenylalanine ammonialyase (PAL) which is a key
enzyme in the biosynthetic pathway of flavonoids such as anthocyanins
and lignin; its activity is stimulated by low temperature and
light (Flores, Oosterhaven, Martínez-Madrid, & Romojaro, 2005;
Tzoumaki et al., 2009). The result exhibited that 0.25% H-chitosan
and 0.50% L-chitosan treated could inhibit and regulate of this
enzyme activity thus maintain the asparagus quality.
Fig. 5. Changes in lignin content of asparagus stored at 2 ◦C for 35 days. Each data
point is the mean of three replicate samples. Vertical bars represent standard deviation
of means.
the total chlorophyll content of the uncoated green asparagus was
only 30.00 mg/100 g FW. Based on the above results, chitosan coating
exhibited beneficial effect on the reduction of color changes in
asparagus.
3.4. Effect of lignin
Lignin is the cell wall component frequently associated with tissue
hardening and plays an important role in the textural attributes
of asparagus. Fig. 5 represents the lignin content of the different
treatments of samples, expressed in mg of lignin/kg fresh
weight (FW). During storage of asparagus, very rapid increases were
observed in the lignin levels. None of the treatments applied was
able to maintain the lignin levels close to those of the fresh product.
However, H-chitosan and L-chitosan treatments could slow the
rate of increase in this composition levels during the storage, especially
0.25% H-chitosan and 0.50% L-chitosan coated. At the 35th
day, the lignin content of 0.25% H-chitosan and 0.50% L-chitosan
treated sample were 5.06, 5.00 mg/100 g FW, respectively. Whereas
the lignin content of untreated sample was up to 5.86 mg/100 g FW.
The lignification in asparagus is controlled by different enzymes,
among them phenylalanine ammonialyase (PAL) which is a key
enzyme in the biosynthetic pathway of flavonoids such as anthocyanins
and lignin; its activity is stimulated by low temperature and
light (Flores, Oosterhaven, Martínez-Madrid, & Romojaro, 2005;
Tzoumaki et al., 2009). The result exhibited that 0.25% H-chitosan
and 0.50% L-chitosan treated could inhibit and regulate of this
enzyme activity thus maintain the asparagus quality.
การแปล กรุณารอสักครู่..
Fig. 5. Changes in lignin content of asparagus stored at 2 ◦C for 35 days. Each data
point is the mean of three replicate samples. Vertical bars represent standard deviation
of means.
the total chlorophyll content of the uncoated green asparagus was
only 30.00 mg/100 g FW. Based on the above results, chitosan coating
exhibited beneficial effect on the reduction of color changes in
asparagus.
3.4. Effect of lignin
Lignin is the cell wall component frequently associated with tissue
hardening and plays an important role in the textural attributes
of asparagus. Fig. 5 represents the lignin content of the different
treatments of samples, expressed in mg of lignin/kg fresh
weight (FW). During storage of asparagus, very rapid increases were
observed in the lignin levels. None of the treatments applied was
able to maintain the lignin levels close to those of the fresh product.
However, H-chitosan and L-chitosan treatments could slow the
rate of increase in this composition levels during the storage, especially
0.25% H-chitosan and 0.50% L-chitosan coated. At the 35th
day, the lignin content of 0.25% H-chitosan and 0.50% L-chitosan
treated sample were 5.06, 5.00 mg/100 g FW, respectively. Whereas
the lignin content of untreated sample was up to 5.86 mg/100 g FW.
The lignification in asparagus is controlled by different enzymes,
among them phenylalanine ammonialyase (PAL) which is a key
enzyme in the biosynthetic pathway of flavonoids such as anthocyanins
and lignin; its activity is stimulated by low temperature and
light (Flores, Oosterhaven, Martínez-Madrid, & Romojaro, 2005;
Tzoumaki et al., 2009). The result exhibited that 0.25% H-chitosan
and 0.50% L-chitosan treated could inhibit and regulate of this
enzyme activity thus maintain the asparagus quality.
การแปล กรุณารอสักครู่..