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Structural and histochemical changes during seed development of Brassica macrocarpa Guss
No full textDuring seed formation of Brassica macrocarpa the development of the embryo precedes that of the integuments; structural changes and histochemical changes are associated. Esterases, acid phosphatases, phenols and starch follow a sigmoid pattern, increasing during embryogenesis and decreasing during seed maturation. In the mature seed, esterase activity is localized in the embryo and in the cells of the mucilaginous, aleuronic and hyaline layers. Acid phosphatases are present in the mucilaginous cells, mainly in the column, the cell walls delimiting intercellular spaces of the cortical cylinder and the adhesion areas of the cotyledons. Phenols are scanty in the root apex, mucilaginous cells and the palisade layer, and abundant in the pigmented layer. Starch is absent in ripe seeds which have lipid and protein reserves. The major classes of storage proteins have molecular weights of 21, 22, 27 and 30 KD and accumulate in the late stages prior to complete drying. Esterases and acid phosphatases in mucilaginous cells of the seed integument suggest that these enzymes are involved in hydrolytic processes occurring prior to germination and that mucilages have a metabolic function in seed-soil interactions
Localization of phenolic compounds and hydrolitic enzymes in ripe seeds of Brassica macrocarpa
No full textDIAGNOSI E TERAPIA MINI-INVASIVA PER LA SCIALOADENITE OSTRUTTIVA.NUOVO APPROCCIO MEDIANTE SCIALOENDOSCOPIA
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Gengivite cronica desquamativa: approccio multidisciplinare in pazienti con lichen planus orale. Risultati di un open clinical trial.
No full textEspressione delle catenine beta e gamma nel carcinoma orale a cellule squamose: possibili implicazioni prognostiche.
No full textManifestazioni orali in pazienti affetti da malattia celiaca: associazione ma non predittività. Studio caso-controllo.
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