Roles of jasmonate signalling in plant inflorescence and flower development

Zheng, Yawen; Zhang, Dabing

doi:10.1016/j.pbi.2015.05.024

Cited by 138 publications

(111 citation statements)

References 69 publications

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“…Withering in flooding conditions might reflect diminished tolerance against abiotic stress. Sterile phenotype is consistent with other reports in which most of the mutants defective in JA biosynthesis show male sterility (Ishiguro et al, 2001;von Malek et al, 2002;Park et al, 2002;Caldelari et al, 2011;Yuan and Zhang, 2015).…”

Section: Hormonal Responses In the Pre Mutantsupporting

confidence: 92%

“…To date, JA and its various metabolites regulate plant responses to abiotic and biotic stresses, as well as plant growth and developmental processes, including senescence, tendril coiling, leaf abscission, tuber formation and inflorescence and flower development (reviewed by Santino et al, 2013;Yuan and Zhang, 2015). The pre mutant exhibited not only defects related to the juvenile-to-adult phase change but also withering in flooding conditions and defects in flower closing and fertilization.…”

Section: Hormonal Responses In the Pre Mutantmentioning

confidence: 99%

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Jasmonate regulates juvenile-adult phase transition in rice

et al. 2016

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Juvenile-to-adult phase transition is an important shift for the acquisition of adult vegetative characteristics and subsequent reproductive competence. We identified a recessive precocious ( pre) mutant exhibiting a long leaf phenotype in rice. The long leaf phenotype is conspicuous in the second to the fourth leaves, which are juvenile and juvenile-to-adult transition leaves. We found that morphological and physiological traits, such as midrib formation, shoot meristem size, photosynthetic rate and plastochron, in juvenile and juvenile-to-adult transition stages of the pre mutant have precociously acquired adult characteristics. In agreement with these results, expression patterns of miR156 and miR172, which are microRNAs regulating phase change, support the accelerated juvenile-to-adult phase change in the pre mutant. The mutated gene encodes an allene oxide synthase (OsAOS1), which is a key enzyme for the biosynthesis of jasmonic acid (JA). The pre mutant showed a low level of JA and enhanced sensitivity to gibberellic acid, which promotes the phase change in some plant species. We also show that prolonged plastochron in the pre mutant is caused by accelerated PLASTOCHRON1 (PLA1) function. The present study reveals a substantial role of JA as a negative regulator of vegetative phase change.

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Section: Hormonal Responses In the Pre Mutantsupporting

confidence: 92%

Section: Hormonal Responses In the Pre Mutantmentioning

confidence: 99%

Jasmonate regulates juvenile-adult phase transition in rice

et al. 2016

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“…In addition to being controlled by Cu availability and other environmental factors (Endo et al, 2009;Smith and Zhao, 2016;Broadley et al, 2012), plant reproduction, including male fertility, is regulated by hormonal cues (Yuan and Zhang, 2015;Cheng et al, 2004;Cecchetti et al, 2008;Song et al, 2013). In this regard, jasmonic acid (JA) and related jasmonate metabolites, collectively called jasmonates, are lipid-derived signaling compounds that in addition to their well established role in plant responses to biotic and abiotic stresses, regulate stamen development and male fertility (Browse, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…JA derives from fatty acids and its biosynthesis involves the sequential action of a series of enzymes (reviewed in Yuan and Zhang, 2015;Kombrink, 2012;Wasternack and Hause, 2013;Fonseca et al, 2009a;Schilmiller et al, 2007). Briefly, JA biosynthetic enzymes include fatty acid desaturases and phospholipases (PLA1/ DAD1) that produce the JA precursor, a-linolenic acid.…”

Section: Introductionmentioning

confidence: 99%

Arabidopsis Pollen Fertility Requires the Transcription Factors CITF1 and SPL7 That Regulate Copper Delivery to Anthers and Jasmonic Acid Synthesis

et al. 2017

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A deficiency of the micronutrient copper (Cu) leads to infertility and grain/seed yield reduction in plants. How Cu affects fertility, which reproductive structures require Cu, and which transcriptional networks coordinate Cu delivery to reproductive organs is poorly understood. Using RNA-seq analysis, we showed that the expression of a gene encoding a novel transcription factor, CITF1 (Cu-DEFICIENCY INDUCED TRANSCRIPTION FACTOR1), was strongly upregulated in Arabidopsis thaliana flowers subjected to Cu deficiency. We demonstrated that CITF1 regulates Cu uptake into roots and delivery to flowers and is required for normal plant growth under Cu deficiency. CITF1 acts together with a master regulator of copper homeostasis, SPL7 (SQUAMOSA PROMOTER BINDING PROTEIN LIKE7), and the function of both is required for Cu delivery to anthers and pollen fertility. We also found that Cu deficiency upregulates the expression of jasmonic acid (JA) biosynthetic genes in flowers and increases endogenous JA accumulation in leaves. These effects are controlled in part by CITF1 and SPL7. Finally, we show that JA regulates CITF1 expression and that the JA biosynthetic mutant lacking the CITF1-and SPL7-regulated genes, LOX3 and LOX4, is sensitive to Cu deficiency. Together, our data show that CITF1 and SPL7 regulate Cu uptake and delivery to anthers, thereby influencing fertility, and highlight the relationship between Cu homeostasis, CITF1, SPL7, and the JA metabolic pathway.

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“…JA signaling also plays central roles in regulating other stress responses as well as several aspects of plant development (11). During flowering, JA signaling has been shown to regulate flower development and pollinator advertisement traits (20)(21)(22)(23). However, the role of JA signaling in regulating constitutive floral defenses has not been investigated.…”

mentioning

confidence: 99%

Flower-specific jasmonate signaling regulates constitutive floral defenses in wild tobacco

Wang

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

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Optimal defense (OD) theory predicts that within a plant, tissues are defended in proportion to their fitness value and risk of predation. The fitness value of leaves varies greatly and leaves are protected by jasmonate (JA)-inducible defenses. Flowers are vehicles of Darwinian fitness in flowering plants and are attacked by herbivores and pathogens, but how they are defended is rarely investigated. We used Nicotiana attenuata, an ecological model plant with well-characterized herbivore interactions to characterize defense responses in flowers. Early floral stages constitutively accumulate greater amounts of two well-characterized defensive compounds, the volatile (E)-α-bergamotene and trypsin proteinase inhibitors (TPIs), which are also found in herbivore-induced leaves. Plants rendered deficient in JA biosynthesis or perception by RNA interference had significantly attenuated floral accumulations of defensive compounds known to be regulated by JA in leaves. By RNA-seq, we found a JAZ gene, NaJAZi, specifically expressed in early-stage floral tissues. Gene silencing revealed that NaJAZi functions as a flower-specific jasmonate repressor that regulates JAs, (E)-α-bergamotene, TPIs, and a defensin. Flowers silenced in NaJAZi are more resistant to tobacco budworm attack, a florivore. When the defensin was ectopically expressed in leaves, performance of Manduca sexta larvae, a folivore, decreased. NaJAZi physically interacts with a newly identified NINJA-like protein, but not the canonical NINJA. This NINJA-like recruits the corepressor TOPLESS that contributes to the suppressive function of NaJAZi on floral defenses. This study uncovers the defensive function of JA signaling in flowers, which includes components that tailor JA signaling to provide flower-specific defense

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Roles of jasmonate signalling in plant inflorescence and flower development

Cited by 138 publications

References 69 publications

Jasmonate regulates juvenile-adult phase transition in rice

Jasmonate regulates juvenile-adult phase transition in rice

Arabidopsis Pollen Fertility Requires the Transcription Factors CITF1 and SPL7 That Regulate Copper Delivery to Anthers and Jasmonic Acid Synthesis

Flower-specific jasmonate signaling regulates constitutive floral defenses in wild tobacco

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