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Akkumulation hydroxyprolinreicher Glykoproteine in TMV‐infizienem Tabak mit systemisch aktivierter Resistenz gegen Echten Mehltau
Author(s) -
Raggi V.
Publication year - 1998
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1998.tb04699.x
Subject(s) - tobacco mosaic virus , biology , powdery mildew , inoculation , tobamovirus , hydroxyproline , salicylic acid , horticulture , botany , virology , virus , biochemistry
Abstract Tobacco cv. Havana 425, with systemic‐acquired resistance (SAR) to an otherwise compatible Erysiphe cicho‐racearum DC. race after TMV infection, was infected with TMV basaily (4 th and 5 th leaves) and the hydroxyproline‐rich glycoproteins (HRGPs) were determined in two experiments (experiment 1 and experiment 2) by analysing cell wall hydroxyproline (Hyp) in the 6 th leaf. In basal TMV infected plants Hyp content (μmol ‐1 FW) was greater than in controls in both experiments: the increase was significant at all times except 16 days after TMV inoculation in experiment 1; the pool of data of experiment 2 was also significantly increased. In TMV protected + E. cichoracearum challenged leaves compared to untreated controls significant increases in Hyp were also noted between the pools of data in both experiments. No differences were found between Hyp content in protected compared to protected + challenged leaves in both experiments. These results show accumulation of HRGPs in Havana tobacco associated with TMV infection and SAR activation against E, cichoracearum. The accumulation appears to be due to the inducer, since no further increase was detected in protected leaves after challenging.