The Importance of Cytokinins during Reproductive Development in Arabidopsis and Beyond

Terceros, Giada Callizaya; Resentini, Francesca; Cucinotta, Mara; Manrique, Silvia; Colombo, Lucia; Mendes, Marta Adelina

doi:10.3390/ijms21218161

Cited by 28 publications

(19 citation statements)

References 86 publications

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“…ABC transporters may play a role in floral scent production in Brassica, as recently shown for Petunia [41], a trait under strong selection in the study of Gervasi and Schiestl [10]. Interestingly, the cytokinins encoded by LONELY GUY (like LOG1 and LOG3 in our results) are known for their importance in reproductive development in Arabidopsis [42]. Some candidate genes are also involved in pectin synthesis and pollen tube growth (GALT6, 43).…”

Section: Resultssupporting

confidence: 73%

Rapid genomic evolution inBrassica rapawith bumblebee selection in experimental evolution

Frachon

Schiestl

2021

Preprint

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Insect pollinators shape rapid phenotypic evolution of traits related to floral attractiveness and plant reproductive success. However, the underlying genomic changes and their impact on standing genetic variation remain largely unknown despite their importance in predicting adaptive responses in nature or in crop’s artificial selection. Here, based on a previous, nine generation experimental evolution study with fast cycling Brassica rapa plants adapting to bumblebees, we document genomic evolution associated to the adaptive process. We performed a genomic scan of the allele frequency changes along the genome and estimated the nucleotide diversity and genomic variance changes. We detected signature of selection associated with rapid changes in allelic frequencies on multiple loci. During experimental evolution, we detected an increase in overall genomic variance, whereas for loci under selection, a reduced variance was apparent in both replicates suggesting a parallel evolution. Our study highlights the polygenic nature of short-term pollinator adaptation and the importance of a such genetic architecture in the maintenance of genomic variance during strong natural selection by biotic factors.

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Section: Resultssupporting

confidence: 73%

Rapid genomic evolution inBrassica rapawith bumblebee selection in experimental evolution

Frachon

Schiestl

2021

Preprint

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“…As long as subsequent developmental processes are successful, promoting ovule initiation will lead to increased number of effective offspring. Most positive regulators of ovule initiation, including developmental signals ( ANT , HLL , LUG , SEU , SIN2 , STK ) and hormone signals (auxin, CK, and BR), also positive regulate subsequent ovule development processes and increase offspring number (Schneitz et al, 1998; Broadhvest et al, 2000; Liu et al, 2000; Azhakanandam et al, 2008; Gomez et al, 2016; Hu et al, 2018; Jia et al, 2020; Terceros et al, 2020; Cucinotta et al, 2021; Cai et al, 2022). However, the function of GA in ovule initiation and seed development is complicated.…”

Section: After Ovule Initiationmentioning

confidence: 99%

Ovule initiation: the essential step controlling offspring number in Arabidopsis

Jiang

Lin

2022

JIPB

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Seed is the offspring of angiosperms. Plants produce large numbers of seeds to ensure effective reproduction and survival in varying environments. Ovule is a fundamentally important organ and is the precursor of the seed. In Arabidopsis and other plants characterized by multi‐ovulate ovaries, ovule initiation determines the maximal ovule number, thus greatly affecting seed number per fruit and seed yield. Investigating the regulatory mechanism of ovule initiation has both scientific and economic significance. However, the genetic and molecular basis underlying ovule initiation remains unclear due to technological limitations. Very recently, rules governing the multiple ovules initiation from one placenta have been identified, the individual functions and crosstalk of phytohormones in regulating ovule initiation have been further characterized, and new regulators of ovule boundary are reported, therefore expanding the understanding of this field. In this review, we present an overview of current knowledge in ovule initiation and summarize the significance of ovule initiation in regulating the number of plant offspring, as well as raise insights for the future study in this field that provide potential routes for the improvement of crop yield.

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“…It is likely, however, that both, the LTMH pollen phenotype in the wild type and the increased tolerance in the low-SA line involve interaction between multiple hormones. In addition to JA, SA, auxin, and ABA have all been implicated in pollen development ( Cardarelli and Cecchetti, 2014 ; Feng et al, 2018 ; Yao et al, 2018 ; Rezaul et al, 2019 ; Terceros et al, 2020 ). Furthermore, multiple hormones are associated with cell division ( Shimotohno et al, 2021 ), carbohydrate metabolism ( Eveland and Jackson, 2012 ), and the heat shock response ( Snyman and Cronjé, 2008 ; Carranco et al, 2010 ; Huang et al, 2016 ; Tian et al, 2020 ; Li et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Low Salicylic Acid Level Improves Pollen Development Under Long-Term Mild Heat Conditions in Tomato

et al. 2022

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Exposure to high temperatures leads to failure in pollen development, which may have significant implications for food security with ongoing climate change. We hypothesized that the stress response-associated hormone salicylic acid (SA) affects pollen tolerance to long-term mild heat (LTMH) (≥14 days exposure to day-/nighttime temperature of 30–34/24–28°C, depending on the genotype), either positively, by inducing acclimation, or negatively, by reducing investment in reproductive development. Here, we investigated these hypotheses assessing the pollen thermotolerance of a 35S:nahG tomato line, which has low SA levels. We found that reducing the SA level resulted in increased pollen viability of plants grown in LTMH and further characterized this line by transcriptome, carbohydrate, and hormone analyses. Low expression of JAZ genes in 35S:nahG and LTMH hypersensitivity of low-jasmonic acid (JA) genotypes together suggest that the increased pollen thermotolerance in the low-SA line involves enhanced JA signal in developing anthers in LTMH. These findings have potential application in the development of more thermotolerant crops.

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The Importance of Cytokinins during Reproductive Development in Arabidopsis and Beyond

Cited by 28 publications

References 86 publications

Rapid genomic evolution inBrassica rapawith bumblebee selection in experimental evolution

Rapid genomic evolution inBrassica rapawith bumblebee selection in experimental evolution

Ovule initiation: the essential step controlling offspring number in Arabidopsis

Low Salicylic Acid Level Improves Pollen Development Under Long-Term Mild Heat Conditions in Tomato

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