CheKine™ Micro Polygalacturonase Assay Kit: Decoding Cell Wall Degradation in Plants and Pathogens

PG: The Master Enzyme of Pectin Degradation

Polygalacturonase (PG) is a key enzyme that catalyzes the hydrolytic cleavage of polygalacturonic acid—the backbone of pectin, a major component of plant cell walls[reference:66]. PG activity is central to numerous biological processes, including fruit softening, pollen pollination, seed development and maturation, organ abscission, and pathogen invasion[reference:67].

Abbkine's CheKine™ Micro Polygalacturonase (PG) Activity Assay Kit (KTB1333) provides a simple, convenient, rapid, and colorimetric method for PG activity quantification in plant tissues, bacteria, fungus, and other biological samples[reference:68].

Fruit Ripening & Post-Harvest Biology

PG is the primary enzyme responsible for:

• Fruit softening — textural changes during ripening
• Cell wall disassembly — pectin solubilization and depolymerization
• Shelf life determination — PG activity correlates with storage stability
• Quality management — optimizing harvest and storage conditions

Plant Pathology & Disease Resistance

Pathogenic fungi and bacteria secrete PG to:

• Degrade plant cell walls — facilitating tissue invasion[reference:69]
• Release nutrients — for pathogen growth and proliferation
• Suppress plant immunity — PG-derived oligogalacturonides act as DAMPs

PG activity measurement enables researchers to:

• Screen for disease-resistant plant varieties
• Evaluate the virulence of plant pathogens
• Test the efficacy of biocontrol agents

Plant Development & Physiology

Beyond ripening and defense, PG is involved in:

• Abscission — cell wall degradation during organ shedding[reference:70]
• Pollen tube growth — cell wall remodeling for fertilization[reference:71]
• Seed germination and maturation — endosperm cell wall degradation[reference:72]

How It Works

In this kit, PG hydrolyzes polygalacturonic acid to generate galacturonic acid, which has a reducing aldehyde group[reference:73]. The reducing sugar reacts with DNS reagent to produce a reddish-brown substance with a characteristic absorption peak at 540 nm[reference:74][reference:75]. PG activity is calculated by measuring the absorbance change at 540 nm[reference:76].

Microvolume Design Advantage

The kit's microvolume design, enhanced specificity, and actionable optimization guidelines address the most common pain points of PG quantification, from basic plant biology to industrial applications[reference:77].

📊 Your Research Area?
Post-Harvest Biology | Plant Pathology | Fruit Ripening | Plant-Microbe Interactions

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