scholarly journals Sustained but Not Transient Phytochrome A Signaling Targets a Region of an Lhcb1*2 Promoter Not Necessary for Phytochrome B Action

2000 ◽  
Vol 12 (7) ◽  
pp. 1203-1211 ◽  
Author(s):  
Pablo D. Cerdán ◽  
Roberto J. Staneloni ◽  
Jimena Ortega ◽  
Matilde M. Bunge ◽  
María J. Rodriguez-Batiller ◽  
...  
Keyword(s):  
Phytochrome B ◽  
Phytochrome A

Phytochromes and seed germination

1998 ◽  
Vol 8 (3) ◽  
pp. 317-329 ◽  
Author(s):  
Jorge J. Casal ◽  
Rodolfo A. Sánchez
Keyword(s):  
Seed Germination ◽  
Red Light ◽  
High Irradiance ◽  
Phytochrome B ◽  
Phytochrome A ◽  
Germination Inhibition ◽  
Growth Capacity ◽  
Small Family ◽  
Recent Advances ◽  
Signalling Process

AbstractThe control of seed germination by red and far-red light is one of the earliest documented phytochrome-mediated processes Phytochrome is now known to be a small family of photoreceptors whose apoproteins are encoded by different genes Phytochrome B (phyB) is present in dry seeds and affects germination of dark imbibed seeds but other phytochromes could also be involved Phytochrome A (phyA) appears after several hours of imbibition and mediates very-low-fluence responses PhyB and other phytochromes different from phyA mediate the classical low-fluence responses The phytochrome involved in high-irradiance responses of seed germination (inhibition of germination under continuous far-red) has not been unequivocally established, although phyA is the most likely candidate Phytochrome can affect embryo growth capacity and/or the constraint imposed by the tissues surrounding the embryo At least in some species, gibberellins participate in the signalling process In the field, phyA has been implicated in the perception of light during soil cultivations, and phyB would be involved in the perception of red/far-red ratios associated with the presence of gaps in the canopy This review describes recent advances in phytochrome research, particularly those derived from the analysis of germination in specific mutants, and their connection with traditional observations on phytochrome control of seed germination

scholarly journals Phytochrome A, phytochrome B and other phytochrome(s) regulate ATHB-2 gene expression in etiolated and green Arabidopsis plants

1997 ◽  
Vol 20 (6) ◽  
pp. 759-763 ◽  
Author(s):  
C. STEINDLER ◽  
M. CARABELLI ◽  
U. BORELLO ◽  
G. MORELLI ◽  
I. RUBERTI
Keyword(s):  
Gene Expression ◽  
Phytochrome B ◽  
Phytochrome A

scholarly journals Regulation of phytochrome B signaling by phytochrome A and FHY1 in Arabidopsis thaliana

1999 ◽  
Vol 18 (5) ◽  
pp. 499-507 ◽  
Author(s):  
Pablo D. Cerdan ◽  
Marcelo J. Yanovsky ◽  
F. Carolina Reymundo ◽  
Akira Nagatani ◽  
Roberto J. Staneloni ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Phytochrome B ◽  
Phytochrome A
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