Differential Splicing of FLM Partially Explains High-Temperature-Induced Flowering Time Plasticity in Wild Ecotypes of Arabidopsis thaliana

2017 ◽  
Vol 178 (9) ◽  
pp. 680-688
Author(s):  
Kattia Palacio-López ◽  
Jill C. Preston ◽  
Jane Molofsky
Keyword(s):  
Arabidopsis Thaliana ◽  
High Temperature ◽  
Flowering Time ◽  
Differential Splicing

scholarly journals Transcriptome and translatome changes in germinated pollen under heat stress uncover roles of transporter genes involved in pollen tube growth

2020 ◽  
Author(s):  
Laetitia Poidevin ◽  
Javier Forment ◽  
Dilek Unal ◽  
Alejandro Ferrando
Keyword(s):  
Arabidopsis Thaliana ◽  
Heat Stress ◽  
High Temperature ◽  
Heat Shock ◽  
Pollen Tube ◽  
Pollen Tube Growth ◽  
Tube Growth ◽  
Heat Shock Genes ◽  
Germinated Pollen

ABSTRACTPlant reproduction is one key biological process very sensitive to heat stress and, as a consequence, enhanced global warming poses serious threats to food security worldwide. In this work we have used a high-resolution ribosome profiling technology to study how heat affects both the transcriptome and the translatome of Arabidopsis thaliana pollen germinated in vitro. Overall, a high correlation between transcriptional and translational responses to high temperature was found, but specific regulations at the translational level were also present. We show that bona fide heat shock genes are induced by high temperature indicating that in vitro germinated pollen is a suitable system to understand the molecular basis of heat responses. Concurrently heat induced significant down-regulation of key membrane transporters required for pollen tube growth, thus uncovering heat-sensitive targets. We also found that a large subset of the heat-repressed transporters is specifically up-regulated, in a coordinated manner, with canonical heat-shock genes in pollen tubes grown in vitro and semi in vivo, based on published transcriptomes from Arabidopsis thaliana. Ribosome footprints were also detected in gene sequences annotated as non-coding, highlighting the potential for novel translatable genes and translational dynamics.

The Arabidopsis thaliana adenosine 5’-phosphosulfate reductase 2 (AtAPR2) participates in flowering time and glucose response

2015 ◽  
Vol 58 (2) ◽  
pp. 128-136 ◽  
Author(s):  
Jung-Sung Chung ◽  
Ha-Nul Lee ◽  
Thomas Leustek ◽  
David B. Knaff ◽  
Cheol Soo Kim
Keyword(s):  
Arabidopsis Thaliana ◽  
Flowering Time ◽  
Glucose Response

Alteration in flowering time causes accelerated or decelerated progression through Arabidopsis vegetative phases

2001 ◽  
Vol 79 (6) ◽  
pp. 657-665 ◽  
Author(s):  
Quintin J Steynen ◽  
Dee A Bolokoski ◽  
Elizabeth A Schultz
Keyword(s):  
Arabidopsis Thaliana ◽  
Flowering Time ◽  
Leaf Shape ◽  
Central Mechanism ◽  
Second Phase ◽  
Wild Type ◽  
Low Light ◽  
Terminal Flower ◽  
Vegetative Phases ◽  
Short Days

We have identified three phases within the wild-type Arabidopsis thaliana (L.) Heynh. rosette, based on significant differences in leaf shape, size, vascular pattern, and presence of abaxial trichomes. To test the hypothesis that a single, central mechanism controls the progression through all plant phases and that conditions that alter the time to flowering will also alter the progression through vegetative phases, we analysed the rosette phases under such conditions. In support of our hypothesis, we determined that those conditions (loss of LEAFY activity, short days) that decelerate time to flowering show decelerated progression through the rosette phases, while those conditions (loss of TERMINAL FLOWER, overexpression of LEAFY, low light) that accelerate time to flowering show accelerated progression through the rosette phases. In all conditions except short days, the length of the first phase was unaffected, indicating that this phase is less susceptible to influences of the central mechanism. Progression through the subsequent two rosette phases was accelerated differentially, such that the second phase was affected more strongly than the first. This supports the idea that, in the rosette, as in the inflorescence, the inhibition of phase transition by the central mechanism is gradually decreasing.Key words: phase change, flowering time, Arabidopsis thaliana, LEAFY, TERMINAL FLOWER, heteroblasty.

Carbon nanoparticles influence photomorphogenesis and flowering time in Arabidopsis thaliana

2018 ◽  
Vol 37 (6) ◽  
pp. 901-912 ◽  
Author(s):  
Abhishek Kumar ◽  
Anamika Singh ◽  
Madhusmita Panigrahy ◽  
Pratap Kumar Sahoo ◽  
Kishore C. S. Panigrahi
Keyword(s):  
Arabidopsis Thaliana ◽  
Flowering Time ◽  
Carbon Nanoparticles

Flowering responses to vernalization and photoperiod in annual medics (Medicago spp.)

1975 ◽  
Vol 26 (5) ◽  
pp. 831 ◽  
Author(s):  
NM Clarkson ◽  
JS Russell
Keyword(s):  
High Temperature ◽  
Flowering Time ◽  
Vernalization Requirement ◽  
Vernalization Response ◽  
The Third ◽  
Long Day ◽  
Temperature Requirement ◽  
New Finding ◽  
Annual Medics

The three processes thought to control flowering times in annual medics (Medicago spp.) are a vernalization requirement, a long day requirement and a high temperature requirement. To examine the first two processes, seed of seven cultivars of six species was vernalized at 1�C for periods of up to 11 weeks, then grown to flowering under three photoperiods in a glasshouse. To study the third process, the time to flowering of selected treatments from this expcrirnent was compared with flowering data from plants grown in the field at a range of temperatures lower than in the glasshouse. Vernalization and photoperiod caused large shifts in flowering time but the effects varied widely among species. M. scutellata was almost insensitive to both factors but in M. rugosa acceleration of up to 91 days was caused by treatment. Vernalization and short dark periods were additive in accelerating flowering and largely able to substitute for each other. Species flowered almost simultaneously when given their most favourable conditions for flowering. High temperature accelerated flowering in all species studied. However, in species other than M. scutellata it was necessary for a vernalization requirement to be met before this effect was observed. A new finding was that the vernalization response in M. truncatula and M. littoralis was largely reversed after more than 7 weeks of vernalization. This suggests a previously undetected flowering mechanism in these species.

A Study of High Temperature Lesions in Arabidopsis Thaliana

1959 ◽  
Vol 12 (2) ◽  
pp. 117 ◽  
Author(s):  
J Langridge ◽  
B Griffing
Keyword(s):  
Arabidopsis Thaliana ◽  
High Temperature ◽  
Plant Growth ◽  
Experimental Designs ◽  
Temperature Extremes ◽  
Composite Hypothesis ◽  
Growth Depression ◽  
Statistical Criteria

The composite hypothesis under test is that (i) at certain temperature extremes plant growth is depressed by the inactivation of one or a few especially sensitive reactions, and (ii) such growth depression may be prevented by providing the plant with the normal products of the inhibited reactions. Appropriate experimental designs and statistical criteria to test this hypothesis are formulated.

scholarly journals High temperature causes breakdown of S haplotype-dependent stigmatic self-incompatibility in self-incompatible Arabidopsis thaliana

2019 ◽  
Vol 70 (20) ◽  
pp. 5745-5751 ◽  
Author(s):  
Masaya Yamamoto ◽  
Kenji Nishimura ◽  
Hiroyasu Kitashiba ◽  
Wataru Sakamoto ◽  
Takeshi Nishio
Keyword(s):  
Arabidopsis Thaliana ◽  
Plasma Membrane ◽  
High Temperature ◽  
Self Incompatibility ◽  
S Haplotype

High temperature disrupts the targeting of SRK to the plasma membrane, resulting in breakdown of the stigmatic self-incompatibility response in self-incompatible Arabidopsis transformants.

scholarly journals BBX32 Interacts with AGL24 Involved in Flowering Time Control in Chinese Cabbage (Brassica rapa L. ssp. pekinensis)

2018 ◽  
Vol 47 (1) ◽  
pp. 34-45
Author(s):  
Guan-Peng MA ◽  
Da-Qin ZHAO ◽  
Tian-Wen WANG ◽  
Lin-Bi ZHOU ◽  
Gui-Lian LI
Keyword(s):  
Arabidopsis Thaliana ◽  
Circadian Clock ◽  
Flowering Time ◽  
Brassica Rapa ◽  
Chinese Cabbage ◽  
Protein Interactions ◽  
Protein Protein Interactions ◽  
Time Control ◽  
Flowering Time Control ◽  
Molecular Regulatory Mechanisms

B-box (BBX) zinc finger proteins play critical roles in both vegetative and reproductive development in plants. Many BBX proteins have been identified in Arabidopsis thaliana as floral transition regulatory factors, such as CO, BBX7 (COL9), BBX19, and BBX32. BBX32 is involved in flowering time control through repression of COL3 in Arabidopsis thaliana, but it is still elusive that whether and how BBX32 directly interacts with flowering signal integrators of AGAMOUS-LIKE 24 (AGL24) and SUPPRESSOR OF OVEREXPRESSION OF CONSTANS 1 (SOC1) in Chinese cabbage (Brassica rapa L. ssp. pekinensis) or other plants. In this study, B-box-32(BBX32), a transcription factor in this family with one B-box motif was cloned from B. rapa, acted as a circadian clock protein, showing expression changes during the circadian period. Additional experiments using GST pull-down and yeast two-hybrid assays indicated that BrBBX32 interacts with BrAGL24 and does not interact with BrSOC1, while BrAGL24 does interact with BrSOC1. To investigate the domains involved in these protein-protein interactions, we tested three regions of BrBBX32. Only the N-terminus interacted with BrAGL24, indicating that the B-box domain may be the key region for protein interaction. Based on these data, we propose that BrBBX32 may act in the circadian clock pathway and relate to the mechanism of flowering time regulation by binding to BrAGL24 through the B-box domain. This study will provide valuable information for unraveling the molecular regulatory mechanisms of BrBBX32 in flowering time of B. rapa.

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