HISTOCHEMICAL-LOCALIZATION OF EXOGENOUS ASCORBIC-ACID IN THE PERICYCLE NUCLEI OF VICIA-FABA

Citation
Am. Innocenti et al., HISTOCHEMICAL-LOCALIZATION OF EXOGENOUS ASCORBIC-ACID IN THE PERICYCLE NUCLEI OF VICIA-FABA, Caryologia, 46(1), 1993, pp. 1-4
Citations number
10
Categorie Soggetti
Genetics & Heredity
Journal title
ISSN journal
00087114
Volume
46
Issue
1
Year of publication
1993
Pages
1 - 4
Database
ISI
SICI code
0008-7114(1993)46:1<1:HOEAIT>2.0.ZU;2-4
Abstract
A more abundant production of lateral roots in Vicia faba seedlings wa s observed after treatment with ascorbic acid, an effect which was pri marily due to enhanced pericycle cells activity. The histochemical loc alization, as revealed by the reduction of silver nitrate into metalli c silver, demonstrated that a wide stain intensity is detectable in th e pericycle nuclei in a zone ranging between 2000 and 2500 mum from th e root tip. In this context, the high ascorbic acid content seems to b e related to the onset of the metabolic activation for the production of lateral roots primordia. On the basis of these observations, it may be speculated that exogenous ascorbic acid, which is known to be invo lved in nucleic acids metabolism, might be both accumulated and utiliz ed by the nuclei of pericycle cells.