구.추천논문
- 조회3,217
Abstract
Department of Biochemistry and Cellular and Molecular Biology, The University of Tennessee, Knoxville, TN 37996-0840, USA
Correspondence to *(fax +1 865 974 6306).
KEYWORDS
photomorphogenesis, flowering, 3'-phosphoadenosine 5'-phosphate,
RNA interference, sulfonation, exoribonuclease
ABSTRACT
Light is one of the most important environmental factors that regulate plant
development. Here we report that a mutation in the Arabidopsis FIERY1 gene (FRY1) caused a shortened
hypocotyl and shorter petioles, most dramatically under low-intensity red light
and less pronounced under far-red and blue-light conditions. Furthermore, the
fry1 mutant flowered late, probably due to a reduced level
of FLOWERING LOCUS T (FT) transcript.
However, although the transcript level of FRY1 was
light-regulated, the chlorophyll level and the expression of typical
light-regulated genes were not affected in the fry1 mutant.
FRY1 is known as a regulator of abiotic stress responses,
and its protein product has dual enzymatic activity comprising inositol
polyphosphate-1-phosphatase and 3'(2'),5'-bisphosphate nucleotidase activity.
Genetic complementation data obtained using cDNA of the FRY1 paralog AHL (Arabidopsis HAL2-like) and
the similar phenotype of an xrn2/xrn3 double mutant suggest
that FRY1 attenuates light responses via its 3'(2'),5'-bisphosphate nucleotidase
activity rather than its inositol polyphosphate-1-phosphatase activity. We
discuss the relationship between the FRY1-associated nucleotidase activity, a
step in the pathway for sulfur metabolism and utilization, and the Arabidopsis
light response.
Received 22 September 2008; revised 22 November 2008; accepted 27 November 2008; published online 22 January 2009.
DIGITAL OBJECT IDENTIFIER (DOI)10.1111/j.1365-313X.2008.03770.x
논문정보
- Research article
- 2009년 04월 (BRIC 등록일 )
- 국외 연구진
- 구・추천논문
댓글 작성 로그인
팝업 닫기관련 링크
