نتایج جستجو برای: polygalacturonase activity

تعداد نتایج: 1135033  

Journal: :World journal of microbiology & biotechnology 1995
F Ampe A Brauman

The origin of root softening during cassava retting was investigated in a natural retting and in a sterile fermentation. Softening only occurred in the natural retting. Although high activities of endogenous pectin methyl esterase were found in cassava extracts from both fermentations, the depolymerizing enzymes polygalacturonase, active at low pH, and pectate lyase were only found in the non-s...

Journal: :Journal of bacteriology 1957
M MANDELS E T REESE

Cellulase is an adaptive enzyme in most fungi (Reese and Levinson, 1952), although it is constitutive in cellulolytic bacteria (Hammerstrom et al., 1955). Many polysaccharases are adaptive in fungi, including: pentosanase (Simpson, 1954), polygalacturonase (Phaff, 1947), chitinase (Reynolds, 1954), dextranase (Hultin and Nordstr6m, 1949), and xylanase and mannanase (S0rensen, 1952). Since many ...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2009
seyed mohammad heydarian babak bonakdarpour jalal mirhoseini

polygalacturonase production under different shear stress environments by aspergillus sp. was studied. it was found that the rate of enzyme production in the stirred tank fermentor decreased with increasing the stirrer speed in the range 300-750 rpm. on the other hand, in a split cylinder air-lift fermentor, the rate of polygalacturonase production slightly increased with increasing in air rate...

Journal: :Horticulturae 2023

Due to the high perishability of figs, calcium stands out as an important nutrient for orchard management. This study aims pre-harvest applications chloride in fig orchards. The trees were sprayed with 0, 0.5, 1.0, 1.5 and 2.0% CaCl2, fruits thereafter stored 7, 14 21 d. variables analysed concentration leaves fruits, weight loss, fruit decay, pectinolytic enzyme activity, physical chemical att...

Journal: :Journal of animal science 2008
B U Metzler R Mosenthin T Baumgärtel M Rodehutscord

Two experiments with growing pigs were conducted to determine the effects of dietary P and Ca level, phytase supplementation, and ileal pectin infusion on ileal and fecal P and Ca balance, chemical composition of fecal mixed bacterial mass (MBM), and bacterial metabolic activity. Pigs (initial BW = 30 kg) were fitted with simple T-cannulas at the distal ileum. They were fed a low-P corn-soybean...

Journal: :Journal of agricultural and food chemistry 2007
Ting Sun Joseph R Powers Juming Tang

A pectolytic enzyme preparation from Aspergillus niger (pectinase AN) decreased most rutin content and antioxidant activity of asparagus juice. To investigate the mechanism of such loss, we analyzed several possible related enzyme activities in pectinase AN. We found that the activity of pectinase AN to oxidize guaiacol had no significant difference with or without the presence of H2O2; thus it...

Journal: :Acta biochimica et biophysica Sinica 2012
S Ashok Prabhu K Ramachandra Kini S Niranjan Raj Bruno M Moerschbacher H S Shetty

Polygalacturonase-inhibitor protein (PGIP) is a defense protein found in plant cell walls. It prevents the degradation of pectin by modulating the endo-polygalacturonase activity. The present study has used heterologous anti-bean PGIP probes to investigate the role of PGIP in pearl millet [Pennisetum glaucum (L) R. Br.] resistance against downy mildew caused by oomycete pathogen Sclerospora gra...

2009
Eleni Gomes Rodrigo Simões Ribeiro Leite Roberto da Silva Dênis Silva

An exo-PG obtained from Penicillium viridicatum in submerged fermentation was purified to homogeneity. The apparent molecular weight of the enzyme was 92 kDa, optimum pH and temperature for activity were pH 5 and 50-55 degrees C. The exo-PG showed a profile of an exo-polygalacturonase, releasing galacturonic acid by hydrolysis of pectin with a high degree of esterification (D.E.). Ions Ca(2+) e...

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