scholarly journals Reshaping the epigenetic landscape during early flower development: induction of attractor transitions by relative differences in gene decay rates

2015 ◽  
Vol 9 (1) ◽  
Author(s):  
Jose Davila-Velderrain ◽  
Carlos Villarreal ◽  
Elena R Alvarez-Buylla
2021 ◽  
Vol 56 (4) ◽  
pp. 540-556.e8 ◽  
Author(s):  
Yassin Refahi ◽  
Argyris Zardilis ◽  
Gaël Michelin ◽  
Raymond Wightman ◽  
Bruno Leggio ◽  
...  

1990 ◽  
Vol 2 (8) ◽  
pp. 755 ◽  
Author(s):  
David R. Smyth ◽  
John L. Bowman ◽  
Elliot M. Meyerowitz

2007 ◽  
Vol 168 (6) ◽  
pp. 801-833 ◽  
Author(s):  
Dmitry D. Sokoloff ◽  
Galina V. Degtjareva ◽  
Peter K. Endress ◽  
Margarita V. Remizowa ◽  
Tahir H. Samigullin ◽  
...  

2020 ◽  
Author(s):  
Yassin Refahi ◽  
Argyris Zardilis ◽  
Gaël Michelin ◽  
Raymond Wightman ◽  
Bruno Leggio ◽  
...  

Abstract The link between gene regulation and morphogenesis of multicellular organisms is a fundamental problem in biology. We address this question in the floral meristem of Arabidopsis, which generates new tissues and organs through complex changes in growth patterns. Starting from high-resolution time-lapse images, we generated a comprehensive 4-D atlas of early flower development including cell lineage, cellular growth rates and the expression patterns of 28 regulatory genes. This information was introduced in MorphoNet, a web-based open-access platform. The application of mechanistic computational models indicated that the molecular network based on the literature only explained a minority of the expression patterns. This was substantially improved by adding single regulatory hypotheses for individual genes. We next used the integrated information to correlate growth with the combinatorial expression of multiple genes. This led us to propose a set of hypotheses for the action of individual genes in morphogenesis, not visible by simply correlating gene expression and growth. This identified the central transcription factor LEAFY as a potential regulator of heterogeneous growth, which was supported by quantifying growth patterns in a leafy mutant. By providing an integrated, multiscale view of flower development, this atlas should represent a fundamental step towards mechanistic multiscale-scale models of flower development.


2005 ◽  
Vol 58 (3) ◽  
pp. 401-419 ◽  
Author(s):  
Xiaohong Zhang ◽  
Baomin Feng ◽  
Qing Zhang ◽  
Diya Zhang ◽  
Naomi Altman ◽  
...  

2012 ◽  
Vol 80 (4-5) ◽  
pp. 429-442 ◽  
Author(s):  
Yuanlin Duan ◽  
Zhuo Xing ◽  
Zhijuan Diao ◽  
Wenying Xu ◽  
Shengping Li ◽  
...  

1992 ◽  
Vol 117 (2) ◽  
pp. 298-303 ◽  
Author(s):  
J.H.M. Barten ◽  
J.W. Scott ◽  
N. Kedar ◽  
Y. Elkind

To identify the stage of flower development sensitive to low temperature-induced rough blossom-end scarring (RBS) in tomato (Lycopersicon esculentum Mill.), short-term low-temperature treatments (1, 3, and 5 days continuously at 10C or 6, 9, and 12 days at 18/10C day/night) were applied to young, flowering plants and to plants at the six-leaf stage. Flowers were tagged at anthesis over 4 weeks and the growth stage of the flowers at the beginning of the treatments was determined in days relative to anthesis. The blossom-end scar index (BSI), a measure for blossom-end scar size relative to fruit size, and number of locules were recorded for mature fruits. In three experiments, 5 days at 10C or 6 days at 18/10C, applied during early flower differentiation, induced RBS in mature fruits. For each of the three cultivars tested `Horizon', Waker', and `Solar Set'), flower buds were most sensitive from 26 to 19 days before anthesis. In this experiment, RBS induction was not caused by an increase in the average number of locules per fruit. A short period of sensitivity during very early flower development explains the variation in RBS among seasons and within plants encountered in field situations. This study also presents a standard induction technique for further investigation of physiological and morphological backgrounds of the disorder and possible genotype screening.


Plants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1424
Author(s):  
Dmitry D. Sokoloff ◽  
Shrirang R. Yadav ◽  
Arun N. Chandore ◽  
Margarita V. Remizowa

Eriocaulaceae (Poales) differ from potentially related Xyridaceae in pattern of floral organ arrangement relative to subtending bract (with median sepal adaxial). Some Eriocaulaceae possess reduced and non-trimerous perianth, but developmental data are insufficient. We conducted a SEM investigation of flower development in three species of Eriocaulon to understand whether organ number and arrangement are stable in E. redactum, a species with a highly reduced calyx and reportedly missing corolla of female flowers. Early flower development is similar in all three species. Male and female flowers are indistinguishable at early stages. Despite earlier reports, both floral types uniformly possess three congenitally united sepals and three petals in E. redactum. Petals and inner stamens develop from common primordia. We assume that scanning electron microscopy should be used in taxonomic accounts of Eriocaulon to assess organ number and arrangement. Two types of corolla reduction are found in Eriocaulaceae: suppression and complete loss of petals. Common petal–stamen primordia in Eriocaulon do not co-occur with delayed receptacle expansion as in other monocots but are associated with retarded petal growth. The ‘reverse’ flower orientation of Eriocaulon is probably due to strictly transversal lateral sepals. Gynoecium development indicates similarities of Eriocaulaceae with restiids and graminids rather than with Xyridaceae.


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