scholarly journals Light-Stimulated Cotyledon Expansion in the blu3 and hy4 Mutants of Arabidopsis thaliana

1994 ◽  
Vol 105 (4) ◽  
pp. 1433-1436 ◽  
Author(s):  
D. E. Blum ◽  
M. M. Neff ◽  
E. Van Volkenburgh
Keyword(s):  
Arabidopsis Thaliana ◽  
Cotyledon Expansion

scholarly journals The Arabidopsis thaliana E3 Ubiquitin Ligase BRIZ Functions in Abscisic Acid Response

2021 ◽  
Vol 12 ◽  
Author(s):  
Katrina J. Linden ◽  
Mon Mandy Hsia ◽  
Yi-Tze Chen ◽  
Judy Callis
Keyword(s):  
Arabidopsis Thaliana ◽  
Abscisic Acid ◽  
E3 Ligase ◽  
Normal Growth ◽  
Growth Conditions ◽  
Aba Signaling ◽  
Wild Type ◽  
Ubiquitin System ◽  
Early Seedling ◽  
Cotyledon Expansion

The ubiquitin system is essential for multiple hormone signaling pathways in plants. Here, we show that the Arabidopsis thaliana E3 ligase BRIZ, a heteromeric ligase that consists minimally of BRIZ1 and BRIZ2 proteins, functions in abscisic acid (ABA) signaling or response. briz1 and briz2 homozygous mutants either fail to germinate or emerge later than wild-type seedlings, with little cotyledon expansion or root elongation and no visible greening. Viability staining indicates that briz1 and briz2 embryos are alive but growth-arrested. Germination of briz mutants is improved by addition of the carotenoid biosynthetic inhibitor fluridone or gibberellic acid (GA3), and briz mutants have improved development in backgrounds deficient in ABA synthesis (gin1-3/aba2) or signaling (abi5-7). Endogenous ABA is not higher in briz2 seeds compared to wild-type seeds, and exogenous ABA does not affect BRIZ mRNAs in imbibed seeds. These results indicate that briz embryos are hypersensitive to ABA and that under normal growth conditions, BRIZ acts to suppress ABA signaling or response. ABA signaling and sugar signaling are linked, and we found that briz1 and briz2 mutants excised from seed coats are hypersensitive to sucrose. Although briz single mutants do not grow to maturity, we were able to generate mature briz2-3 abi5-7 double mutant plants that produced seeds. These seeds are more sensitive to exogenous sugar and are larger than seeds from sibling abi5-7 BRIZ2/briz2-3 plants, suggesting that BRIZ has a parental effect on seed development. From these data, we propose a model in which the BRIZ E3 ligase suppresses ABA responses during seed maturation and germination and early seedling establishment.

Stable genetic transformation of Arabidopsis thaliana by Agrobacterium inoculation in planta

1994 ◽  
Vol 5 (4) ◽  
pp. 551-558 ◽  
Author(s):  
Seok So Chang ◽  
Soon Ki Park ◽  
Byung Chul Kim ◽  
Bong Joong Kang ◽  
Dal Ung Kim ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Genetic Transformation ◽  
In Planta

The effect of daylength on the transition to flowering in phytochrome-deficient, late-flowering and double mutants of Arabidopsis thaliana

1995 ◽  
Vol 95 (2) ◽  
pp. 260-266 ◽  
Author(s):  
Maarten Koornneef ◽  
Corrie Hanhart ◽  
Patty van Loenen-Martinet ◽  
Hetty Blankestijn de Vries
Keyword(s):  
Arabidopsis Thaliana ◽  
Late Flowering ◽  
Transition To Flowering

Identification of a single-copy gene encoding a Type I chlorophyll a/b-binding polypeptide of photosystem I in Arabidopsis thaliana

1992 ◽  
Vol 84 (4) ◽  
pp. 561-567 ◽  
Author(s):  
Poul E. Jensen ◽  
Michael Kristensen ◽  
Tine Hoff ◽  
Jan Lehmbeck ◽  
Bjarne M. Stummann ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Chlorophyll A ◽  
Photosystem I ◽  
Single Copy ◽  
Type I ◽  
Single Copy Gene ◽  
Gene Encoding ◽  
Copy Gene

Flavonoid profiling by LC-MS IN 14 – 3-3ν knockout mutants of Arabidopsis thaliana during drought stress conditions

Planta Medica ◽  
2014 ◽  
Vol 80 (10) ◽  
Author(s):  
F Nabbie ◽  
O Shperdheja ◽  
J Millot ◽  
J Lindberg ◽  
B Peethambaran
Keyword(s):  
Arabidopsis Thaliana ◽  
Drought Stress ◽  
Stress Conditions ◽  
Knockout Mutants
Sign in / Sign up

Export Citation Format

Share Document