Photomorphogenic mutants of Arabidopsis thaliana reveal activities of multiple photosensory systems during light-stimulated apical-hook opening

Planta ◽  
1993 ◽  
Vol 191 (2) ◽  
Author(s):  
E. Liscum ◽  
R.P. Hangarter
Keyword(s):  
Arabidopsis Thaliana ◽  
Apical Hook ◽  
Photomorphogenic Mutants

scholarly journals FRUITFULL Is a Repressor of Apical Hook Opening in Arabidopsis thaliana

2020 ◽  
Vol 21 (17) ◽  
pp. 6438
Author(s):  
Miriam Führer ◽  
Angelika Gaidora ◽  
Peter Venhuizen ◽  
Jedrzej Dobrogojski ◽  
Chloé Béziat ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
In Silico ◽  
Target Genes ◽  
Growth Promotion ◽  
In Silico Analysis ◽  
Regulatory Elements ◽  
Suitable Model ◽  
Differential Growth ◽  
Apical Hook ◽  
Growth Transitions

Plants adjust their architecture to a constantly changing environment, requiring adaptation of differential growth. Despite their importance, molecular switches, which define growth transitions, are largely unknown. Apical hook development in dark grown Arabidopsis thaliana (A. thaliana) seedlings serves as a suitable model for differential growth transition in plants. Here, we show that the phytohormone auxin counteracts the light-induced growth transition during apical hook opening. We, subsequently, identified genes which are inversely regulated by light and auxin. We used in silico analysis of the regulatory elements in this set of genes and subsequently used natural variation in gene expression to uncover correlations between underlying transcription factors and the in silico predicted target genes. This approach uncovered that MADS box transcription factor AGAMOUS-LIKE 8 (AGL8)/FRUITFULL (FUL) modulates apical hook opening. Our data shows that transient FUL expression represses the expression of growth stimulating genes during early phases of apical hook development and therewith guards the transition to growth promotion for apical hook opening. Here, we propose a role for FUL in setting tissue identity, thereby regulating differential growth during apical hook development.

scholarly journals Water-soluble chlorophyll protein is involved in herbivore resistance activation during greening of Arabidopsis thaliana

2015 ◽  
Vol 112 (23) ◽  
pp. 7303-7308 ◽  
Author(s):  
Edouard Boex-Fontvieille ◽  
Sachin Rustgi ◽  
Diter von Wettstein ◽  
Steffen Reinbothe ◽  
Christiane Reinbothe
Keyword(s):  
Arabidopsis Thaliana ◽  
Stress Responses ◽  
Fluorescent Protein ◽  
Seedling Emergence ◽  
Water Soluble ◽  
Herbivore Resistance ◽  
Porcellio Scaber ◽  
Apical Hook ◽  
Etiolated Plants

Water-soluble chlorophyll proteins (WSCPs) constitute a small family of unusual chlorophyll (Chl)-binding proteins that possess a Kunitz-type protease inhibitor domain. In Arabidopsis thaliana, a WSCP has been identified, named AtWSCP, that forms complexes with Chl and the Chl precursor chlorophyllide (Chlide) in vitro. AtWSCP exhibits a quite unexpected expression pattern for a Chl binding protein and accumulated to high levels in the apical hook of etiolated plants. AtWSCP expression was negatively light-regulated. Transgenic expression of AtWSCP fused to green fluorescent protein (GFP) revealed that AtWSCP is localized to cell walls/apoplastic spaces. Biochemical assays identified AtWSCP as interacting with RD21 (RESPONSIVE TO DESICCATION 21), a granulin domain-containing cysteine protease implicated in stress responses and defense. Reconstitution experiments showed tight interactions between RD21 and WSCP that were relieved upon Chlide binding. Laboratory feeding experiments with two herbivorous isopod crustaceans, Porcellio scaber (woodlouse) and Armadillidium vulgare (pillbug), identified the apical hook as Achilles’ heel of etiolated plants and that this was protected by RD21 during greening. Because Chlide is formed in the apical hook during seedling emergence from the soil, our data suggest an unprecedented mechanism of herbivore resistance activation that is triggered by light and involves AtWSCP.

scholarly journals Light-Stimulated Apical Hook Opening in Wild-Type Arabidopsis thaliana Seedlings

1993 ◽  
Vol 101 (2) ◽  
pp. 567-572 ◽  
Author(s):  
E. Liscum ◽  
R. P. Hangarter
Keyword(s):  
Arabidopsis Thaliana ◽  
Wild Type ◽  
Apical Hook

scholarly journals The auxin influx carriers AUX1 and LAX3 are involved in auxin-ethylene interactions during apical hook development in Arabidopsis thaliana seedlings

Development ◽  
2010 ◽  
Vol 137 (4) ◽  
pp. 597-606 ◽  
Author(s):  
F. Vandenbussche ◽  
J. Petrasek ◽  
P. Zadnikova ◽  
K. Hoyerova ◽  
B. Pesek ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Apical Hook

scholarly journals Role of PIN-mediated auxin efflux in apical hook development of Arabidopsis thaliana

Development ◽  
2010 ◽  
Vol 137 (4) ◽  
pp. 607-617 ◽  
Author(s):  
P. Zadnikova ◽  
J. Petrasek ◽  
P. Marhavy ◽  
V. Raz ◽  
F. Vandenbussche ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Apical Hook

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
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