A role for the Auxin Response Factors ARF6 and ARF8 homologs in petal spur elongation and nectary maturation in Aquilegia

Zhang, Rui; Min, Ya; Holappa, Lynn D.; Walcher-Chevillet, Cristina L; Duan, Xiaoshan; Donaldson, Emily C.; Kong, Hongzhi; Kramer, Elena M.

doi:10.1111/nph.16633

Cited by 25 publications

(27 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Auxin response factors 6 and 8 (ARF6 and ARF8) are involved in the regulation of floral organ development, including petal expansion, anther dehiscence, stamen filament elongation, cell elongation, and nectary maturation [58]. Both ARF6 and ARF8 stimulate JA produc-tion by controlling the JA-responsive TFs MYB21 and MYB24 to promote the growth of floral organs [59].…”

Section: Ja-auxin Crosstalkmentioning

confidence: 99%

See 1 more Smart Citation

Function and Mechanism of Jasmonic Acid in Plant Responses to Abiotic and Biotic Stresses

Wang

Mostafa

Zeng

et al. 2021

IJMS

194

108

View full text Add to dashboard Cite

As sessile organisms, plants must tolerate various environmental stresses. Plant hormones play vital roles in plant responses to biotic and abiotic stresses. Among these hormones, jasmonic acid (JA) and its precursors and derivatives (jasmonates, JAs) play important roles in the mediation of plant responses and defenses to biotic and abiotic stresses and have received extensive research attention. Although some reviews of JAs are available, this review focuses on JAs in the regulation of plant stress responses, as well as JA synthesis, metabolism, and signaling pathways. We summarize recent progress in clarifying the functions and mechanisms of JAs in plant responses to abiotic stresses (drought, cold, salt, heat, and heavy metal toxicity) and biotic stresses (pathogen, insect, and herbivore). Meanwhile, the crosstalk of JA with various other plant hormones regulates the balance between plant growth and defense. Therefore, we review the crosstalk of JAs with other phytohormones, including auxin, gibberellic acid, salicylic acid, brassinosteroid, ethylene, and abscisic acid. Finally, we discuss current issues and future opportunities in research into JAs in plant stress responses.

show abstract

Section: Ja-auxin Crosstalkmentioning

confidence: 99%

“…The results demonstrated that JA-GA signaling regulates the activity of the defensive proteins polyphenol oxidases (PPOs). Elevated JA levels due to the activation of CsPPO2 and CsPPO4 induce PPO activity [59].…”

Section: Ja-ga Crosstalkmentioning

confidence: 99%

Function and Mechanism of Jasmonic Acid in Plant Responses to Abiotic and Biotic Stresses

Wang

Mostafa

Zeng

et al. 2021

IJMS

194

108

View full text Add to dashboard Cite

show abstract

“…10A). IAA9 emerged from the present study, while the others are known regulators of Aquilegia nectar spur cell division (AqPOP; Ballerini et al, 2020) or cell elongation (AqBEHs and AqARFs; Zhang et al, 2020;Conway et al, 2021).…”

Section: Exploration Of Candidate Genes Of Interest-mentioning

confidence: 60%

“…The main developmental difference between A. brevistyla and A. canadensis that appears to be responsible for the straightening of the spur is increased differential cell elongation between spur compartments in A. canadensis. Genes upregulated in A. canadensis 50% stage proximal tissue (when and where increased rate of cell elongation becomes prominent) are enriched for auxin signaling GO terms, a process associated with cell expansion in above-ground plant organs (Went, 1927;dela Fuente and Leopold, 1970;Christian et al, 2006) and specifically in Aquilegia petal spurs (Zhang et al, 2020).…”

Section: Synthesis Of Developmental and Transcriptomic Data-mentioning

confidence: 99%

Complex developmental and transcriptional dynamics underlie pollinator-driven evolutionary transitions in nectar spur morphology in Aquilegia (columbine)

Edwards

Ballerini

Kramer

2022

Preprint

Self Cite

View full text Add to dashboard Cite

Premise: Determining the developmental programs underlying morphological variation is key to elucidating the evolutionary processes that generated the stunning biodiversity of the angiosperms. Here, we characterize the developmental and transcriptional dynamics of the elaborate petal nectar spur of Aquilegia (columbine) in species with contrasting pollination syndromes and spur morphologies. Methods: We collected petal epidermal cell number and length data across four Aquilegia species, two with the short, curved nectar spurs of the bee-pollination syndrome, and two with the long, straight spurs of the hummingbird syndrome. We also performed RNA-seq on A. brevistyla (bee) and A. canadensis (hummingbird) distal and proximal spur compartments at multiple developmental stages. Finally, we intersected these datasets with a previous QTL mapping study on spur length and shape to identify new candidate loci. Results: The differential growth between the proximal and distal surfaces of curved spurs is primarily driven by differential cell division. However, independent transitions to straight spurs in the hummingbird syndrome have evolved by increasing differential cell elongation between spur surfaces. The RNA-seq data reveal these tissues to be transcriptionally distinct, and point to auxin signaling as being involved with the differential cell elongation responsible for the evolution of straight spurs. We identify several promising candidate genes for future study. Conclusions: Our study, taken together with previous work in Aquilegia, reveals the complexity of the developmental mechanisms underlying trait variation in this system. The framework we have establish here will lead to exciting future work examining candidate genes and processes involved in the rapid radiation of the genus.

show abstract

“…In the latter, the role of a member of the TCP transcription factor family, TCP4 and of auxin-related genes have been strongly suspected (Yant et al 2015). Indeed, two AUXIN RESPONSIVE FACTOR genes, ARF6 and ARF8 have recently been shown to promote cell elongation and the maturation of the nectary during spur formation in Aquilegia coerulea E.James (Zhang et al 2020). In this species and in contrast with core eudicots where a role of the YABBY gene CRABS CLAW has been found (Lee et al 2005), nectary formation seems to involve genes of the STYLISH transcription factor gene family (Min et al 2019).…”

Section: Possible Evolutionary Trends and Developmental Pathwaysmentioning

confidence: 99%

Floral Organogenesis and Morphogenesis ofStaphisagria(Ranunculaceae): Implications for the Evolution of Synorganized Floral Structures in Delphinieae

Zalko

Frachon

Morel

et al. 2021

International Journal of Plant Sciences

View full text Add to dashboard Cite

Premise of the research. Floral synorganization is a structural feature of many speciose angiosperm taxa, and is considered as a morphological innovation paving the way for evolutionary diversification. Staphisagria is sister to the remaining Delphinieae, the only lineage of Ranunculaceae characterized by zygomorphic flowers. We aim at providing a description of floral organogenesis and morphogenesis in both Staphisagria species, presenting the disparity of Delphinieae hyperorgan in a phylogenetic framework, and proposing a scenario of likely developmental pathways underlying the different types of hyperorgans in Delphinieae. Methodology. We carried out morphological, anatomical, and developmental studies on flowers of Staphisagria macrosperma and S. picta. Pivotal results. Synorganization is complex in Staphisagria and Delphinieae as a whole, and involves flower dorsoventralization, nesting of spurs, postgenital fusion of petals, and the formation of a shared cavity. From a choripetalous ancestor, late and partial postgenital fusion among dorsal petals evolved once or twice in the tribe. Conclusions. Delphinieae flower includes nested spurs and nested floral parlors. These key innovations, unique in angiosperms, probably led to the diversification of this species-rich tribe in the Northern Hemisphere. The length of the inner (nectariferous) spurs and the nested floral parlors determine the range of pollinators able to collect nectar. These traits could be used to revise the circumscription of taxonomic groups within the tribe, and should be taken into account when examining the possible coevolution between Delphinieae flowers and their pollinators. Integrating this new knowledge about the hyperorgan will be essential for future research in taxonomy, evo-devo and pollination ecology in Delphinieae.

show abstract

A role for the Auxin Response Factors ARF6 and ARF8 homologs in petal spur elongation and nectary maturation in Aquilegia

Abstract: This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as

Cited by 25 publications

References 54 publications

Function and Mechanism of Jasmonic Acid in Plant Responses to Abiotic and Biotic Stresses

Function and Mechanism of Jasmonic Acid in Plant Responses to Abiotic and Biotic Stresses

Complex developmental and transcriptional dynamics underlie pollinator-driven evolutionary transitions in nectar spur morphology in Aquilegia (columbine)

Floral Organogenesis and Morphogenesis ofStaphisagria(Ranunculaceae): Implications for the Evolution of Synorganized Floral Structures in Delphinieae

Contact Info

Product

Resources

About