Regulation of Banana Phytoene Synthase (MaPSY) Expression, Characterization and Their Modulation under Various Abiotic Stress Conditions

Kaur, Navneet; Pandey, Ashutosh; Shivani, .; Kumar, Prateek; Pandey, Pankaj; Kesarwani, Atul Kumar; Mantri, Shrikant; Awasthi, Praveen; Tiwari, Siddharth

doi:10.3389/fpls.2017.00462

Cited by 34 publications

(20 citation statements)

References 88 publications

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“…Treatment with gibberellic acid also promoted a delay on starch degradation in bananas (Rossetto et al., 2003), although the mechanism is apparently not the same as for auxin. Studies with other hormones such as abscisic acid and methyl jasmonate have influenced banana ripening in other aspects, such as cell wall metabolism (Lohani et al., 2004) and carotenoid synthesis (Kaur et al., 2017). However, more research needs to be carried out to fully understand the cross talk of these plant hormones in starch-to-sucrose metabolism during banana ripening.…”

Section: Hormonal and Genetic Regulation Of Starch-to-sucrose Metabolmentioning

confidence: 99%

The Starch Is (Not) Just Another Brick in the Wall: The Primary Metabolism of Sugars During Banana Ripening

et al. 2019

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The monocot banana fruit is one of the most important crops worldwide. As a typical climacteric fruit, the harvest of commercial bananas usually occurs when the fruit is physiologically mature but unripe. The universal treatment of green bananas with ethylene or ethylene-releasing compounds in order to accelerate and standardize the ripening of a bunch of bananas mimics natural maturation after increasing the exogenous production of ethylene. The trigger of autocatalytic ethylene production regulated by a dual positive feedback loop circuit derived from a NAC gene and three MADS genes results in metabolic processes that induce changes in the primary metabolism of bananas. These changes include pulp softening and sweetening which are sensorial attributes that determine banana postharvest quality. During fruit development, bananas accumulate large amounts of starch (between 15 and 35% w/w of their fresh weight, depending on the cultivar). Pulp softening and sweetening during banana ripening are attributed not only to changes in the activities of cell wall hydrolases but also to starch-to-sugar metabolism. Therefore, starch granule erosion and disassembling are key events that lead bananas to reach their optimal postharvest quality. The knowledge of the mechanisms that regulate sugar primary metabolism during banana ripening is fundamental to reduce postharvest losses and improve final product quality, though. Recent studies have shown that ethylene-mediated regulation of starch-degrading enzymes at transcriptional and translational levels is crucial for sugar metabolism in banana ripening. Furthermore, the crosstalk between ethylene and other hormones including indole-3-acetic acid and abscisic acid also influences primary sugar metabolism. In this review, we will describe the state-of-the-art sugar primary metabolism in bananas and discuss the recent findings that shed light on the understanding of the molecular mechanisms involved in the regulation of this metabolism during fruit ripening.

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Section: Hormonal and Genetic Regulation Of Starch-to-sucrose Metabolmentioning

confidence: 99%

The Starch Is (Not) Just Another Brick in the Wall: The Primary Metabolism of Sugars During Banana Ripening

et al. 2019

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“…In wheat also three PSY genes have been identified; the expression of PSY1 expression was associated with β-carotene synthesis in the grain, while PSY3 was highly expressed in the stem, leaves, seed developmental stages and under different stress conditions (Flowerika et al, 2016). Of the three PSY genes isolated from banana, two are related to PSY2 of Z. mays and one to PSY1 (Kaur et al, 2017). Finally, two PSY genes have been identified in the flowers of Crocus ancyrensis , with PSY2 more strongly expressed than PSY1 , and mainly associated with apocarotenoid biosynthesis in flower tissues (Ahrazem et al, 2015a).…”

Section: Introductionmentioning

confidence: 99%

The Specialized Roles in Carotenogenesis and Apocarotenogenesis of the Phytoene Synthase Gene Family in Saffron

Ahrazem

Diretto²,

et al. 2019

Front. Plant Sci.

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Crocus sativus stigmas are the main source of crocins, which are glucosylated apocarotenoids derived from zeaxanthin cleavage that give saffron its red color. Phytoene synthase (PSY) mediates the first committed step in carotenoid biosynthesis in plants. Four PSY genes encoding functional enzymes were isolated from saffron. All the proteins were localized in plastids, but the expression patterns of each gene, CsPSY1a , CsPSY1b , CsPSY2 , and CsPSY3 , in different saffron tissues and during the development of the stigma showed different tissue specialization. The CsPSY2 transcript was primarily detected in the stigmas where it activates and stimulates the accumulation of crocins, while its expression was very low in other tissues. In contrast, CsPSY1a and CsPSY1b were mainly expressed in the leaves, but only CsPSY1b showed stress-light regulation. Interestingly, CsPSY1b showed differential expression of two alternative splice variants, which differ in the intron retention at their 5′ UTRs, resulting in a reduction in their expression levels. In addition, the CsPSY1a and CsPSY1b transcripts, together with the CsPSY3 transcript, were induced in roots under different stress conditions. The CsPSY3 expression was high in the root tip, and its expression was associated with mycorrhizal colonization and strigolactone production. CsPSY3 formed a separate branch to the stress-specific Poaceae homologs but was closely related to the dicot PSY3 enzymes.

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“…The difference in gene expression between these two cultivars decreased (FC = −5.47) after infestation with B. tabaci . Phytoene synthase catalyzes carotenoid biosynthesis (von Lintig et al ., 1997; Toledo-Ortiz et al ., 2010) and its coding gene is induced in tomato in response to saline stress (Zhou et al ., 2007), as well as in banana under abiotic stresses (Kaur et al ., 2017), but not in compatible or incompatible interactions to nematodes (Bhattarai et al ., 2008). Neither Pys1 has shown differential expression in response of Arabidopsis to whiteflies (Kempema et al ., 2007).…”

Section: Discussionmentioning

confidence: 99%

Basal differences in the transcriptional profiles of tomato leaves associated with the presence/absence of the resistance geneMi-1and changes in these differences after infestation by the whiteflyBemisia tabaci

Rodríguez-Álvarez

López‐Vidriero

Franco-Zorrilla

et al. 2019

Bull. Entomol. Res.

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AbstractThe tomato Mi-1 gene mediates plant resistance to whitefly Bemisia tabaci, nematodes, and aphids. Other genes are also required for this resistance, and a model of interaction between the proteins encoded by these genes was proposed. Microarray analyses were used previously to identify genes involved in plant resistance to pests or pathogens, but scarcely in resistance to insects. In the present work, the GeneChip™ Tomato Genome Array (Affymetrix®) was used to compare the transcriptional profiles of Motelle (bearing Mi-1) and Moneymaker (lacking Mi-1) cultivars, both before and after B. tabaci infestation. Ten transcripts were expressed at least twofold in uninfested Motelle than in Moneymaker, while other eight were expressed half or less. After whitefly infestation, differences between cultivars increased to 14 transcripts expressed more in Motelle than in Moneymaker and 14 transcripts less expressed. Half of these transcripts showed no differential expression before infestation. These results show the baseline differences in the tomato transcriptomic profile associated with the presence or absence of the Mi-1 gene and provide us with valuable information on candidate genes to intervene in either compatible or incompatible tomato–whitefly interactions.

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Regulation of Banana Phytoene Synthase (MaPSY) Expression, Characterization and Their Modulation under Various Abiotic Stress Conditions

Cited by 34 publications

References 88 publications

The Starch Is (Not) Just Another Brick in the Wall: The Primary Metabolism of Sugars During Banana Ripening

The Starch Is (Not) Just Another Brick in the Wall: The Primary Metabolism of Sugars During Banana Ripening

The Specialized Roles in Carotenogenesis and Apocarotenogenesis of the Phytoene Synthase Gene Family in Saffron

Basal differences in the transcriptional profiles of tomato leaves associated with the presence/absence of the resistance geneMi-1and changes in these differences after infestation by the whiteflyBemisia tabaci

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