Regulation of Changes in Proteins and Enzymes Associated with Active Defence against Virus Infection

Loon, L.C. van

doi:10.1007/978-1-4615-8309-7_14

Cited by 74 publications

(45 citation statements)

References 42 publications

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“…The PR proteins were originally discovered in relation to the hypersensitive response induced by tobacco mosaic virus (TMV) (Gianinazzi, Martin, and Vallee, 1970;Van Loon and Van Kammen, 1970). They have been associated with systemic acquired resistance and incipient antipathogen effects (Van Loon, 1982; Richardson, Valdes-Rodriguez, and BlancoLabra, 1987). Best characterized in tobacco, PR proteins fall into five major groups that are coordinately regulated in response to infection by fungi, bacteria, and viruses.…”

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confidence: 99%

Pathogenesis-Related Proteins Are Developmentally Regulated in Tobacco Flowers

Lotan¹,

Ori²,

Fluhr³

1989

The Plant Cell

106

133

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The accumulation of pathogenesis-related proteins (PR) in tobacco leaves has been casually related to pathogen and specific physiological stresses. The known enzymatic function of some of these proteins is potentially antimicrobial. By using antibodies specific to three classes of pathogenesis-related proteins, we examined tobacco plants during their normal growth. The pathogenesis-related proteins accumulated during the normal development of the tobacco flower. The PR-1 class of proteins (biological function unknown) is located in sepal tissue. PR-P,Q polypeptides are endochitinases and are present in pedicels, sepals, anthers, and ovaries. A glycoprotein serologically related to the PR-2,N,O class is a (1,3)-P-glucanase and is present in pistils. Differential appearance during flower development, in situ localization, and post-translational processing of floral pathogenesis-related proteins point to a hitherto unsuspected function these classes of pathogenesis-related proteins play in the normal process of flowering and reproductive physiology. INTRODUCTIONThe de novo synthesis of pathogenesis-related (PR) proteins (Van Loon, 1985; Matsuoka et al., 1987;Kombrink, Schroder, and Hahlbrock, 1988; Nasser et al., 1988; Rigden and Coutts, 1988) is a ubiquitous reaction of monocot and dicot plants to pathogen attack. The PR proteins were originally discovered in relation to the hypersensitive response induced by tobacco mosaic virus (TMV) (Gianinazzi, Martin, and Vallee, 1970;Van Loon and Van Kammen, 1970). They have been associated with systemic acquired resistance and incipient antipathogen effects (Van Loon, 1982; Richardson, Valdes-Rodriguez, and BlancoLabra, 1987). Best characterized in tobacco, PR proteins fall into five major groups that are coordinately regulated in response to infection by fungi, bacteria, and viruses. Distinct enzymatic functions recently have been described for two groups of PR proteins. One group, consisting of hydrolytic acidic proteins PR9,N,O, has been shown to have (1,3)-@-glucanase activity (Kauffmann et al., 1987). Another group, consisting of two acidic protein isoforms PR-P,Q, has endochitinase activity (Legrand et al., 1987). Both groups of hydrolases can attack the main components of fungal and bacterial cell walls (Schlumbaum et al., 1986; BOI and Van Kan, 1988;Mauch, Mauch-Mani, and Boller, 1988). The function of a third group of three acidic proteins, viz., PR-la, PR-1 b, and PR-lc, remains enigmatic. Ethylene, a plant hormone, may be a natural mediator of the response (Van Loon, 1982, 1985Vogeli, Meins, and Boller, 1988), which can be brought about by both ' To whom correspondence should be addressed. biotic and chemical elicitors (White, 1979; Asselin, Grenier, and Cote, 1985) and physiological stress induced by aging (Fraser, 1981) or aberrant hormonal levels (Memelink, Hoge, and Schilperoort, 1987;Shinshi, Mohnen, and Meins, 1987).The pathogenesis-related response and the in vitro demonstration of direct inhibition of fungal growth by some of the proteins have highligh...

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confidence: 99%

Pathogenesis-Related Proteins Are Developmentally Regulated in Tobacco Flowers

Lotan¹,

Ori²,

Fluhr³

1989

The Plant Cell

106

133

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“…Réponse à deux niveaux Keen (1982Keen ( , 1986 (Doke et al, 1987) (Kiraly, 1980;Van Loon, 1982;Goodman et al, 1986;Ward, 1986 (Van Loon, 1982;Ward, 1986 Grisebach et Ebel (1978), Stoessl (1980Stoessl ( , 1983, Bailey (1982aBailey ( , 1982bBailey ( , 1983), Darvill et Albersheim (1984), Brooks et Watson (1985), Crute et al (1985), Kuc et Rush (1985), Ebel (1986), Keen (1986) (Cruickshank et Perrin, 1960Perrin, , 1963Perrin et Bottomley, 1962 (Paxton, 1981) (Coxon, 1982). La majeure partie des études concerne toutefois les seules légumineuses (Ingham, 1982) et solanacées (Kuc, 1982).…”

Section: Déterminisme Génétiqueunclassified

Les phytoalexines et leur intervention dans la résistance hypersensible aux champignons phytopathogènes

Rouxel¹

1989

Agronomie

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“…28 PR-3 and PR-4 have chitinase activity. 29 The exact role of the PR proteins and their regulation during the establishment of the beneficial interaction between P. indica and Arabidopsis remains to be determined.…”

Section: Methodsmentioning

confidence: 99%