Endogenous Auxin Content Contributes to Larger Size of Apple Fruit

Hayee, Bu; Wu, Yu; Yuan, Hui; Yue, Pengtao; Wei, Yun; Wang, Aide

doi:10.3389/fpls.2020.592540

Cited by 29 publications

(26 citation statements)

References 48 publications

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“…This gene is expressed during cell division and cell expansion, consistent with a potential role in the control of fruit size ( Devoghalaere et al, 2012 ). Consistently, transcriptome analysis of “Longfeng” apple and its large-fruited bud sport variety “Grand Longfeng” showed that most of the differential genes were related to auxin signaling, including the auxin synthetic genes MdTAR1 and MdYUCCA6 ( Bu et al, 2020 ). These results suggested that auxin played a critical role in trait development of single fruit weight in apple.…”

Section: Apple Fruit Appearance Qualitymentioning

confidence: 83%

Research Progress on Genetic Basis of Fruit Quality Traits in Apple (Malus × domestica)

et al. 2022

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Identifying the genetic variation characteristics of phenotypic traits is important for fruit tree breeding. During the long-term evolution of fruit trees, gene recombination and natural mutation have resulted in a high degree of heterozygosity. Apple (Malus × domestica Borkh.) shows strong ecological adaptability and is widely cultivated, and is among the most economically important fruit crops worldwide. However, the high level of heterozygosity and large genome of apple, in combination with its perennial life history and long juvenile phase, complicate investigation of the genetic basis of fruit quality traits. With continuing augmentation in the apple genomic resources available, in recent years important progress has been achieved in research on the genetic variation of fruit quality traits. This review focuses on summarizing recent genetic studies on apple fruit quality traits, including appearance, flavor, nutritional, ripening, and storage qualities. In addition, we discuss the mapping of quantitative trait loci, screening of molecular markers, and mining of major genes associated with fruit quality traits. The overall aim of this review is to provide valuable insights into the mechanisms of genetic variation and molecular breeding of important fruit quality traits in apple.

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Section: Apple Fruit Appearance Qualitymentioning

confidence: 83%

Research Progress on Genetic Basis of Fruit Quality Traits in Apple (Malus × domestica)

et al. 2022

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“…Gradually, people perceived that it impacted a variety of physiological activities in plants, including senescence controlling, responses to abiotic stress and pathogens, formation of fruits, establishment and maintenance of cell polarity, apical dominance, phototropism, geotropism, etc. [ 4 , 5 , 38 , 39 , 40 , 41 ]. Auxin is synthesized in immature tissues such as tender leaves, cotyledons, and roots [ 42 , 43 , 44 , 45 , 46 ].…”

Section: Discussionmentioning

confidence: 99%

“…Auxin primarily originates from Greek, meaning growth [ 1 ]. It is irreplaceable during plant growth and development, which influences plant apical growth, axillary bud formation, floral organ development, and root development [ 2 , 3 , 4 , 5 ]. On the cell level, auxin is competent in changing the plasticity of plant cells, facilitating cells to differentiate and elongate.…”

Section: Introductionmentioning

confidence: 99%

CkREV Enhances the Drought Resistance of Caragana korshinskii through Regulating the Expression of Auxin Synthetase Gene CkYUC5

Ren

Zhang

et al. 2022

IJMS

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As a common abiotic stress, drought severely impairs the growth, development, and even survival of plants. Here we report a transcription factor, Caragana korshinskii REVOLUTA(CkREV), which can bidirectionally regulate the expression of the critical enzyme gene CkYUC5 in auxin synthesis according to external environment changes, so as to control the biosynthesis of auxin and further enhance the drought resistance of plants. Quantitative analysis reveals that the expression level of both CkYUC5 and AtYUC5 is down-regulated after C. korshinskii and Arabidopsis thaliana are exposed to drought. Functional verification of CkREV reveals that CkREV up-regulates the expression of AtYUC5 in transgenic A. thaliana under common conditions, while down-regulating it under drought conditions. Meanwhile, the expression of CkYUC5 is also down-regulated in C. korshinskii leaves instantaneously overexpressing CkREV. We apply a dual-luciferase reporter system to discover that CkREV can bind to the promoter of CkYUC5 to regulate its expression, which is further proved by EMSA and Y1H esxperiments. Functional verification of CkREV in C. korshinskii and transgenic A. thaliana shows that CkREV can regulate the expression of CkYUC5 and AtYUC5 in a contrary way, maintaining the equilibrium of plants between growth and drought resisting. CkREV can positively regulate the expression of CkYUC5 to promote auxin synthesis in favor of growth under normal development. However, CkREV can also respond to external signals and negatively regulate the expression of CkYUC5, which inhibits auxin synthesis in order to reduce growth rate, lower water demands, and eventually improve the drought resistance of plants.

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“…Nevertheless, the IAA concentration in the ‘O’Neal’ hypanthium maintained a relatively low level, rapidly increased beginning in the early cell expansion phase, and reached a relatively high level during maturation ( Figure 2C ). Bu et al (2020) reported that higher endogenous IAA was synthesized by a larger apple cultivar, and exogenous 1-naphthylacetic acid (NAA) treatment significantly increased fruit mass, whereas 2,3,5-triiodobenzoic acid (TIBA, an inhibitor of auxin polarity transportation) significantly decreased fruit mass. Therefore, high-level endogenous auxin in blueberry fruits might promote fruit cell expansion (not cell proliferation) and result in the production of larger fruits.…”

Section: Discussionmentioning

confidence: 99%

Transcriptomic and Physiological Analysis Reveals the Responses to Auxin and Abscisic Acid Accumulation During Vaccinium corymbosum Flower Bud and Fruit Development

et al. 2022

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Blueberry (Vaccinium corymbosum) is reputed as a rich source of health-promoting phytonutrients, which contributes to its burgeoning consumer demand and production. However, blueberries are much smaller and have lower yields than most domesticated berries, and the inherent regulatory mechanisms remain elusive. In this study, the cytological and physiological changes, as well as comparative transcriptomic analysis throughout flower and fruit development in the southern highbush blueberry cultivar ‘O’Neal’ were performed. ‘O’Neal’ hypanthium and fruit exhibited a distinctive cell proliferation pattern, and auxin accumulation was unusual throughout development, while abscisic acid (ABA) levels rapidly increased in association with anthocyanin accumulation, total phenolic reduction and fruit maturation. Transcriptomic data showed that many differentially expressed genes (DEGs) were specifically expressed at each flower bud and fruit developmental stage. Further weighted gene co-expression network analysis (WGCNA) revealed numerous DEGs that correlated with the cell numbers of outer mesocarp and columella, showed two distinctive expression patterns. Most of the DEGs involved in auxin biosynthesis, transportation and signal transduction were upregulated, and this upregulation was accompanied by cell expansion, and flower bud and fruit development. However, individual members ofVcSAUR50andVcIAA9families might be insensitive to auxin, suggesting that these genes play a distinctive role in the growth and development of blueberry fruits. These results will support future research to better understand the flower and fruit development of southern highbush blueberry.

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Endogenous Auxin Content Contributes to Larger Size of Apple Fruit

Cited by 29 publications

References 48 publications

Research Progress on Genetic Basis of Fruit Quality Traits in Apple (Malus × domestica)

Research Progress on Genetic Basis of Fruit Quality Traits in Apple (Malus × domestica)

CkREV Enhances the Drought Resistance of Caragana korshinskii through Regulating the Expression of Auxin Synthetase Gene CkYUC5

Transcriptomic and Physiological Analysis Reveals the Responses to Auxin and Abscisic Acid Accumulation During Vaccinium corymbosum Flower Bud and Fruit Development

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