pH regulation of pectate lyase secretion modulates the attack of Colletotrichum gloeosporioides on avocado fruits

Article Abstract:

A pH below 6 inhibits the production of pectate lyases by the avocado pathogen, Colletotrichum gloeosporioides. This could explain why the unripe avocado with a pH of 5.2 is resistant to attack, whereas the ripe fruit with a pH of 6.3 is susceptible.

Food spoilage

---

External pH and nitrogen source affect secretion of pectate lyase by Colletotrichum gloeosporioides

Article Abstract:

Research has been conducted on pectate lyase. The role of nitrogen source and external pH in secretion of virulence factor pectate lyase has been examined, and the hypothesis that nitrogen source availability and ambient pH are independent signals for genes' transcriptional regulation has been tested.

United States, Israel, Industrial Gas Manufacturing, Nitrogenous Fertilizer Manufacturing, Industrial gases, Nitrogen, Nitrogenous fertilizers, Ammonia, Analysis, Genetic aspects, Microbiology, Genetic regulation, Secretion, Bacterial proteins, Microbial populations, Microbial ecology

---

Effect of ammonia production by Colletotrichum gloeosporioides on pelB activation, pectate lyase secretion, and fruit pathogenicity

Article Abstract:

A study was conducted to determine the importance of ammonia accumulation in the secretion of pectase lyase (PL) by inducing secretion of ammonia by Colletotrichum gloeosporioides in the presence of KNO3. The results indicate that ambient pH alkalinization resulting from ammonia accumulation and the availability of ammonia as a nitrogen source independently regulates pelB expression, pectate lyase secretion, and virulence of C. gloeosporioides in the avocado fruit.

Fruits and tree nuts, not elsewhere classified, Other Noncitrus Fruit Farming, Avocados, Contamination, Pathogenic microorganisms, Ammonification

Similar abstracts:

• Abstracts: Identification of human and animal adenoviruses and polyomaviruses for determination of sources of fecal contamination in the environment
• Abstracts: Comparative study of pressure-induced germination of Bacillus subtilis spores at low and high pressures. Comparative study of pressure- and nutrient-induced germination of Bacillus subtilis spores
• Abstracts: Raf induces TGF(beta) production while blocking its apoptotic but not invasive responses: a mechanism leading to increased malignancy in epithelial cells
• Abstracts: Chromatin-specific regulation of LEF-1-beta-catenin transcription activation and inhibition in vitro
• Abstracts: Restriction/modification systems and restriction endonucleases are more effective on lactococcal bacteriophages that have emerged recently in the dairyindustry

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.