The role of roots in cysteine biosynthesis by Arabidopsis thaliana.

Abstract:

:O-Acetylserine(thiol)lyase (OASTL) enzyme catalyzes the cysteine biosynthesis in photosynthetic organisms. In mature Arabidopsis thaliana the highest activity level is observed in non-photosynthetic tissues like roots, that also show significant amount of protein detected by Western blot analysis. By means of specific probes for cytosolic and plastidic OASTL isoenzyme transcripts, cytosolic isoenzyme has been determined to be predominantly expressed in roots, while the expression of the plastidic isoform is high in both green and non-green tissues. Sulfur starvation produces an increase on the OASTL activity level in all the Arabidopsis organs examined, this effect being particularly significant in the aerial parts of the plant.

journal_name

J Physiol Biochem

authors

Barroso C,Vega JM,Gotor C

subject

Has Abstract

pub_date

1998-12-01 00:00:00

pages

189-94

issue

4

eissn

1138-7548

issn

1877-8755

journal_volume

54

pub_type

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