Transcriptome analysis of an mvp mutant reveals important changes in global gene expression and a role for methyl jasmonate in vernalization and flowering in wheat

Diallo, Amadou Oury; Agharbaoui, Zahra; Badawi, Mohamed; Ali-Benali, Mohamed Ali; Moheb, Amira; Houde, Mario; Sarhan, Fathey

doi:10.1093/jxb/eru102

Cited by 43 publications

(38 citation statements)

References 75 publications

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“…Arabidopsis plants treated with jasmonate are also late flowering with short internodes and loss of apical dominance, giving an appearance similar to bop1-6D or pny pnf/+ mutants. Inhibitory effects of MeJA on flowering are also reported in Pharbitis nil (Maciejewska and Kopceiwicz, 2002;Maciejewska et al, 2004), Chenopodium rubrum (Albrechtová and Ullmann, 1994), and einkorn wheat (Triticum monococcum; Diallo et al, 2014). JA antagonism of growth or flowering has been linked to repression of GA biosynthesis (Magome et al, 2004;Heinrich et al, 2013), stabilization of DELLAs (Yang et al, 2012), and/or induction of AP2/ERF factors (Magome et al, 2008;Sun et al, 2008;Kang et al, 2011;Licausi et al, 2013).…”

Section: Ja Antagonism Of Growth and Floweringmentioning

confidence: 95%

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Repression of lateral organ boundary genes by PENNYWISE and POUND-FOOLISH is essential for meristem maintenance and flowering in Arabidopsis thaliana1

et al. 2015

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ORCID IDs: 0000-0002-0050-4001 (B.C.S.); 0000-0002-3526-7982 (J.L.); 0000-0001-7896-6049 (M.P.); 0000-0001-7144-1274 (D.X.); 0000-0001-5026-095X (S.Ci.); 0000-0002-6496-3792 (S.R.H.); 0000-0003-1808-5172 (V.P.).In the model plant Arabidopsis (Arabidopsis thaliana), endogenous and environmental signals acting on the shoot apical meristem cause acquisition of inflorescence meristem fate. This results in changed patterns of aerial development seen as the transition from making leaves to the production of flowers separated by elongated internodes. Two related BEL1-like homeobox genes, PENNYWISE (PNY) and POUND-FOOLISH (PNF), fulfill this transition. Loss of function of these genes impairs stem cell maintenance and blocks internode elongation and flowering. We show here that pny pnf apices misexpress lateral organ boundary genes BLADE-ON-PETIOLE1/2 (BOP1/2) and KNOTTED-LIKE FROM ARABIDOPSIS THALIANA6 (KNAT6) together with ARABIDOPSIS THALIANA HOMEOBOX GENE1 (ATH1). Inactivation of genes in this module fully rescues pny pnf defects. We further show that BOP1 directly activates ATH1, whereas activation of KNAT6 is indirect. The pny pnf restoration correlates with renewed accumulation of transcripts conferring floral meristem identity, including FD, SQUAMOSA PROMOTER-BINDING PROTEIN LIKE genes, LEAFY, and APETALA1. To gain insight into how this module blocks flowering, we analyzed the transcriptome of BOP1-overexpressing plants. Our data suggest a central role for the microRNA156-SQUAMOSA PROMOTER BINDING PROTEIN-LIKE-microRNA172 module in integrating stress signals conferred in part by promotion of jasmonic acid biosynthesis. These data reveal a potential mechanism by which repression of lateral organ boundary genes by PNY-PNF is essential for flowering.Plant development relies on the activity of the shoot apical meristem (SAM) as a continuous source of founder cells for production of new leaves, shoots, and internodes throughout the life cycle (for review, see Aichinger et al., 2012). A tight balance between the allocation of cells to developing primordia and the perpetuation of pluripotent stem cells in the central zone maintains the SAM at a constant size. In Arabidopsis (Arabidopsis thaliana), the vegetative SAM produces leaves in a spiral phyllotaxy with dormant axillary meristems. In conjunction, internode elongation is repressed, resulting in a basal rosette. The transition to flowering is governed by internal and external signals that converge at the SAM to promote acquisition of inflorescence meristem (IM) fate (for review, see Amasino and Michaels, 2010;Srikanth and Schmid, 2011;Andrés and Coupland, 2012). This process, known as floral evocation, results in new patterns of growth at the shoot apex, including production of flowers, and an increase in stem elongation, called bolting. Lateral organ boundaries are specialized domains of restricted growth that separate meristem and organ compartments and produce axillary meristems (for review, see Aida and Tasaka, 2006;Tian et al., 2014). Early in the transition t...

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Section: Ja Antagonism Of Growth and Floweringmentioning

confidence: 95%

“…Its targets include SPL genes, which are also directly activated by SOC1 and FD Porri et al, 2012). How these various pathways are integrated with stress signals is an area of active study (Yang et al, 2012;Heinrich et al, 2013;Hou et al, 2013;Diallo et al, 2014;Stief et al, 2014).…”

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confidence: 99%

Repression of lateral organ boundary genes by PENNYWISE and POUND-FOOLISH is essential for meristem maintenance and flowering in Arabidopsis thaliana1

et al. 2015

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“…Conversely, MeJA levels were maintained high till 4DAS, while these levels returned to control levels at 8DAS. The results indicates that the two different forms of JAs are presumably interchangeable and might share common signal transduction pathway in Pongamia during salt stress (Diallo et al, 2014; Mitra Baldwin, 2014; Cao et al, 2016; Li et al, 2017). An exogenous application of JAs reduced shoot growth, enhanced water uptake and cell wall synthesis in certain crop species (Kang et al, 2005; Uddin et al, 2013; Shahzad et al, 2015; Tavallali Karimi, 2019).…”

Section: Discussionmentioning

confidence: 84%

Systematic hormone-metabolite network provides insights of high salinity tolerance inPongamia pinnata(L.) pierre

Marriboina

Sharma

Sengupta

et al. 2020

Preprint

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Salinity stress results significant losses in plant productivity, and loss of cultivable lands. Although Pongamia pinnata is reported to be a salt tolerant semiarid tree crop, the adaptive mechanisms to saline environment are elusive. The present investigation describes alterations in hormonal and metabolic responses in correlation with physiological and molecular variations in leaves and roots of Pongamia at sea salinity level (3% NaCl) for 8 days. At physiological level, salinity induced adjustments in plant morphology, leaf gas exchange and ion accumulation patterns were observed. Our study also revealed that phytohormones including JAs and ABA play crucial role in promoting the salt adaptive strategies such as apoplasmic Na+ sequestration and cell wall lignification in leaves and roots of Pongamia. Correlation studies demonstrated that hormones including ABA, JAs and SA showed a positive interaction with selective compatible metabolites (sugars, polyols and organic acids) to aid in maintaining osmotic balance and conferring salt tolerance to Pongamia. At the molecular level, our data showed that differential expression of transporter genes as well as antioxidant genes regulate the ionic and ROS homeostasis in Pongamia. Collectively, these results shed new insights on an integrated physiological, structural, molecular and metabolic adaptations conferring salinity tolerance to Pongamia.High lightOur data, for the first time, provide new insights for an integrated molecular and metabolic adaptation conferring salinity tolerance in Pongamia. The present investigation describes alterations in hormonal and metabolic responses in correlation with physiological and molecular variations in Pongamia at sea salinity level (3% NaCl) for 8 days.

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“…jasmonic acid-amido synthetase JAR1 (JAR1) is one of 19 closely related Arabidopsis genes that issimilar to the auxin-induced soybean GH3 gene [59]. Methyl JA (MeJA)-treated vernalization in insensitive spring wheat exhibited flowering and considerably downregulated TaVRN1 and TaFT1 genes, suggesting that MeJA may modulate vernalization and flowering time in wheat [60]. Previous studies have reported that CK promotes the formation of floral meristems and exogenously applied CK promotes Arabidopsis flowering [61,62].…”

Section: Changes In the Plant Hormone Signal Transduction Pathway Durmentioning

confidence: 99%

Comparative Transcriptome Analysis of Gene Expression and Regulatory Characteristics Associated with Different Vernalization Periods in Brassica rapa

Dai

Zhang

Sun

et al. 2020

Genes

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Brassica rapa is an important Chinese vegetable crop that is beneficial to human health. The primary factor affecting B. rapa yield is low temperature, which promotes bolting and flowering, thereby lowering its commercial value. However, quickened bolting and flowering can be used for rapid breeding. Therefore, studying the underlying molecular mechanism of vernalization in B. rapa is crucial for solving production-related problems. Here, the transcriptome of two B. rapa accessions were comprehensively analyzed during different vernalization periods. During vernalization, a total of 974,584,022 clean reads and 291.28 Gb of clean data were obtained. Compared to the reference genome of B. rapa, 44,799 known genes and 2280 new genes were identified. A self-organizing feature map analysis of 21,035 differentially expressed genes was screened in two B. rapa accessions, ‘Jin Wawa’ and ‘Xiao Baojian’. The analysis indicated that transcripts related to the plant hormone signal transduction, starch and sucrose metabolism, photoperiod and circadian clock, and vernalization pathways changed notably at different vernalization periods. Moreover, different expression patterns of TPS, UGP, CDF, VIN1, and seven hormone pathway genes were observed during vernalization between the two accessions. The transcriptome results of this study provide a new perspective on the changes that occur during B. rapa vernalization, as well as serve as an excellent reference for B. rapa breeding.

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Transcriptome analysis of an mvp mutant reveals important changes in global gene expression and a role for methyl jasmonate in vernalization and flowering in wheat

Abstract: Summary Molecular and physiological analyses of a wheat mvp mutant, and winter and spring wheats suggest that methyl jasmonate is involved in modulating vernalization and floral transition in wheat.

Cited by 43 publications

References 75 publications

Repression of lateral organ boundary genes by PENNYWISE and POUND-FOOLISH is essential for meristem maintenance and flowering in Arabidopsis thaliana1

Repression of lateral organ boundary genes by PENNYWISE and POUND-FOOLISH is essential for meristem maintenance and flowering in Arabidopsis thaliana1

Systematic hormone-metabolite network provides insights of high salinity tolerance inPongamia pinnata(L.) pierre

Comparative Transcriptome Analysis of Gene Expression and Regulatory Characteristics Associated with Different Vernalization Periods in Brassica rapa

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