The influence of lulo (Solanum quitoense Lam) fruit maturity stage on polygalacturonase and pectate lyase secretion by Colletotrichum acutatum
| Autor: | Sixta Tulia Martínez-Peralta, Blanca Ligia Higuera-Mancipe, Ana Patricia Martínez-González |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine chemistry.chemical_classification biology food and beverages Ripening biology.organism_classification 01 natural sciences food.food Cell wall 03 medical and health sciences Horticulture 030104 developmental biology Enzyme food chemistry Colletotrichum acutatum Pectate lyase Solanum quitoense Secretion Pectinase 010606 plant biology & botany |
| Zdroj: | Tropical Plant Pathology. 43:218-229 |
| ISSN: | 1983-2052 |
| Popis: | The influence of the lulo fruit maturity stage on the secretion of polygalacturonase (PG) and pectate lyase (PL) enzymes by Colletotrichum acutatum was determined. The study was performed using in vitro assays in the presence of exocarp and cell walls (CW) of the fruit at three different ripening stages (unripe, semi-ripe and ripe). The results showed that PG behaves as a constitutive enzyme and is only induced by semi-ripe CW, while PL is induced with the exocarp of lulo fruits at the three maturation stages, although its activity was highest with semi-ripe fruit. This enzymatic behavior might be related to the quiescent stage of the pathogen in the fruit, as C. acutatum remains quiescent until maturation begins. The profiles of PL induction were different in the presence of the CW and the exocarp inducers, whereas PG levels barely varied, indicating that the process of obtaining the CWs may eliminate a compound that contributes to the induction of PL secretion. |
| Databáze: | OpenAIRE |
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