Control of sexuality by the
            <i>sk1</i>
            -encoded UDP-glycosyltransferase of maize

Hayward, Andy; Moreno, Marlene Aparecida; Howard, Thomas P.; Hague, Joel; Nelson, Kimberly; Heffelfinger, Christopher; Romero, Sandra P.; Kausch, Albert P.; Glauser, Gaëtan; Acosta, Iván F.; Mottinger, John P.; Dellaporta, Stephen L.

doi:10.1126/sciadv.1600991

Cited by 28 publications

(39 citation statements)

References 47 publications

(57 reference statements)

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“…Li et al, 2018;J. Moreover, maize Silkless 1 (SK1), a peroxisomal UDP-glycosyltransferase that suppresses JA accumulation, is also involved in sex determination (Hayward et al, 2016). By contrast, the Arabidopsis opr3 mutant is male sterile (Sanders et al, 2000), and the maize opr7 opr8 double mutant is defective in sex determination and defense (Yan et al, 2012).…”

Section: Biosynthesis Of Phytohormonesmentioning

confidence: 99%

Peroxisomes: versatile organelles with diverse roles in plants

Pan

Wang

et al. 2019

New Phytologist

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Summary Peroxisomes are small, ubiquitous organelles that are delimited by a single membrane and lack genetic material. However, these simple‐structured organelles are highly versatile in morphology, abundance and protein content in response to various developmental and environmental cues. In plants, peroxisomes are essential for growth and development and perform diverse metabolic functions, many of which are carried out coordinately by peroxisomes and other organelles physically interacting with peroxisomes. Recent studies have added greatly to our knowledge of peroxisomes, addressing areas such as the diverse proteome, regulation of division and protein import, pexophagy, matrix protein degradation, solute transport, signaling, redox homeostasis and various metabolic and physiological functions. This review summarizes our current understanding of plant peroxisomes, focusing on recent discoveries. Current problems and future efforts required to better understand these organelles are also discussed. An improved understanding of peroxisomes will be important not only to the understanding of eukaryotic cell biology and metabolism, but also to agricultural efforts aimed at improving crop performance and defense.

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Section: Biosynthesis Of Phytohormonesmentioning

confidence: 99%

Peroxisomes: versatile organelles with diverse roles in plants

Pan

Wang

et al. 2019

New Phytologist

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“…1), which functions in reproductive development and during wound and defense responses (for review, see Wasternack and Hause, 2013). For example, a maize peroxisomal JA-modifying enzyme controls sex determination (Hayward et al, 2016). Moreover, wounding increases ACX1 and PED1 transcript levels (Cruz Castillo et al, 2004) and Arabidopsis acx1, aim1, and ped1 mutants fail to produce JA after wounding (Cruz Castillo et al, 2004;Delker et al, 2007).…”

Section: B-oxidation: Not Just For Fatty Acidsmentioning

confidence: 99%

Peroxisome Function, Biogenesis, and Dynamics in Plants

2017

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“…SILKLESS 1 ( SK1 ) is a classic maize gene in the sex differentiation pathway recently shown to encode a UDP‐glycosyltransferase (Hayward et al, ). sk1 mutants have aborted upper flowers and no silks, indicating that SK1 protects upper flowers in the ear from abortion (Calderon‐Urrea & Dellaporta, ).…”

Section: Sexual Differentiation In Grass Flowersmentioning

confidence: 99%

“…Given these results, as well as the wide range of JA functions in plant development (Gundlach et al, 1992;Creelman & Mullet, 1995), it is possible that TS2 homologs have more general roles in development in grasses outside the Panicoideae and there are alternative genetic controls of unisexuality in other grasses (Malcomber & Kellogg, 2006). SILKLESS 1 (SK1) is a classic maize gene in the sex differentiation pathway recently shown to encode a UDPglycosyltransferase (Hayward et al, 2016). sk1 mutants have aborted upper flowers and no silks, indicating that SK1 protects upper flowers in the ear from abortion (Calderon-Urrea & Dellaporta, 1999).…”

Section: Hormones and Sexual Differentiation In Maizementioning

confidence: 99%

“…TS2 is epistatic to SK1 (Irish et al, 1994;Calderon-Urrea & Dellaporta, 1999), and TS2 is ectopically expressed in the upper ear flowers of sk1 mutants, suggesting that TS2 is likely acting to abort the upper flower (Dellaporta & Calderon-Urrea, 1994). SK1 localizes to the peroxisome of tobacco BY-2 cells where, coincidentally, bioactive JA-Ile is synthesized (Hayward et al, 2016). This localization supports the hypothesis that SK1 disrupts JA-mediated carpel abortion in upper ear flowers (Irish et al, 1994;Calderon-Urrea & Dellaporta, 1999).…”

Section: Hormones and Sexual Differentiation In Maizementioning

confidence: 99%

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Grass flowers: An untapped resource for floral evo‐devo

Schrager‐Lavelle

Klein

Fisher

et al. 2017

J of Sytematics Evolution

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The abrupt origin and rapid diversification of the flowering plants presents what Darwin called "an abominable mystery". Floral diversification was a key factor in the rise of the flowering plants, but the molecular underpinnings of floral diversity remain mysterious. To understand the molecular biology underlying floral morphological evolution, genetic model systems are essential for rigorously testing gene function and gene interactions. Most model plants are eudicots, while in the monocots genetic models are almost entirely restricted to the grass family. Likely because grass flowers are diminutive and specialized for wind pollination, grasses have not been a major focus in floral evo-devo research. However, while grass flowers do not exhibit any of the raucous morphological diversification characteristic of the orchids, there is abundant floral variation in the family. Here, we discuss grass flower diversity, and review what is known about the developmental genetics of this diversity. In particular, we focus on three aspects of grass flower evolution: (1) the evolution of a novel organ identity-the lodicule; (2) lemma awns and their diversity; and (3) the convergent evolution of sexual differentiation. The combination of morphological diversity in the grass family at large and genetic models spread across the family provides a powerful framework for attaining deep understanding of the molecular genetics of floral evolution.

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Control of sexuality by the sk1 -encoded UDP-glycosyltransferase of maize

Abstract: The maize silkless 1 gene encodes a UDP-glycosyltransferase that protects pistils from elimination by jasmonic acid signaling.

Cited by 28 publications

References 47 publications

Peroxisomes: versatile organelles with diverse roles in plants

Peroxisomes: versatile organelles with diverse roles in plants

Peroxisome Function, Biogenesis, and Dynamics in Plants

Grass flowers: An untapped resource for floral evo‐devo

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