Pyrus communis

Pyrus communis (pear) Rubus fruticosus (blackberry) Rubus ideaus (raspberry)... 

Carbonaro M, Mattera M, Nicoli S, Bergamo P and Cappelloni M (2002), Modulation of antioxidant compounds in organic vs conventional fruit (peach, Prunus persica L., and pear, Pyrus communis L.) , J Agric Food Chem, 50, 5458-5462. 

Ferreira D, Guyot S, Mamet N, Delgadillo I, Renard CM and Coimbra MA. 2002. Composition of phenolic compounds in a Portuguese pear (Pyrus communis L. var. S. Bartolomeu) and changes after sun-drying. 

Occurs in apples -Malus pumila and Pyrus communis... 

Wardrop (13,14) examined sclerenchyma fibers of Liriodendron tulip-ifera and sclereids of Pyrus communis, previously fixed with KMn04, and concluded that the vesicles supplied their contents to the cell wall, though the origin of the vesicles was not established. As discussed before, however, permanganate fixation is undesirable for these cytological observations. 

Fischer, T.C. et al.. Molecular cloning, substrate specificity of the functionally expressed dihydroflavonol 4-reductases from Malus domestica and Pyrus communis cultivars and the consequences for flavonoid metabolism Arch. Biochem. Biophys., 412, 223, 2003. 

Kahle K, Preston C, Richling E, Heckel F, Schreier P (2005) On-line gas chromatography combustion/pyrolysis isotope ratio mass spectrometry (HRGC-C/P-lRMS) of major volatiles from pear fruit (Pyrus communis) and pear products. Food Chem 91 449 Tamura H, Appel M, Richling E, Schreier P (2005) Authenticity assessment of y- and 5-deca-lactone from Prunus fruits by gas chromatography combustion/pyrolysis isotope ratio mass spectrometry (GC-C/P-IRMS). J Agric Food Chem 53 5397... 

Ramirez, da V.A. and M.J. Nitsche (1987). Control de malezas en perales (Pyrus communis L.) menores de tres anos. Agricultura Tecnica, 47 35 40. 

If the structure of a GA can be inferred from its mass spectrum the suspected compound may be synthesized and its mass spectrum compared with that of the unknown. Thus the structures of GAlj.6 and GA y were confirmed by the partial synthesis of their methyl esters from GA4 (38). This synthesis will be discussed in detail later. GAM was identified in immature seeds of Pyrus communis (pear) in an analogous manner by comparison of its mass spectrum with that of a product obtained from incubating ent-15 -hydroxykaurenoic acid with a mutant of the fungus G. fujikuroi (29). 

The Bl-tla mutant was found also to metabolize ent-lfo-hydroxy-kaurenoic acid to a number of 150-hydroxylated GAs (J.R. Bearder K. Kybird, unpublished information), one of which, 58-hydroxy GAg., was subsequently identified as a new GA, GAl, in seeds of Pyrus communis (39) ... 

Arbutin (= Hydroquinone-P-D-glucopyranoside) (phenol glucoside) Rhodiola sacra (Crassulaceae), Origanum majorana (Lamiaceae), Pyrus communis (Rosaceae) PEP (391 pM) [115]... 

Dibenzofurans (Phe furan Phe) include various fungal infection-induced plant antifungal compounds (phytoalexins) such as the Rosaceae-derived cotonefuran (from Cotoneaster lactea) and a-pyrofurans (from Pyrus communis). Usnic acid from lichens (notably Usnea species) is anti-mycobacterial, anti-mitotic, an uncoupler and a potent inhibitor of plant protoporphyrinogen synthetase and 4-hydroxphenylpyruvate dioxygenase. 

Glycolic acid (= Hydroxyacetic acid) (carboxylic acid) Universal Allium cepa (Liliaceae), Malus domestica (apple), Pyrus communis (pear) (Rosaceae), Vitis vinifera (Vitaceae) [green fruit] Saccharum officinale (sugar cane juice) (Poaceae) Sour (acid) taste [irritant]... 

Hdianihus annuus (Com positae)(/22) Nicotiana tabacum (So-lanaceae) (149) Pyrus communis (Rosaceae) (123)... 

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