Jasmonic acid negatively regulates branch growth in pear

Cheng, Yuanyuan; Liang, Chengcheng; Qiu, Zhiyun; Zhou, Siqi; Liu, Jianlong; Yang, Yingjie; Wang, Ran; Yin, Jie; Ma, Chunhui; Cui, Zhenhua; Song, Jiuzhou; Li, Dingli

doi:10.3389/fpls.2023.1105521

Cited by 6 publications

(3 citation statements)

References 58 publications

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“…The SPL genes are mainly expressed in meristems and are critical to regulating the branching and vegetative growth of alfalfa plants [ 55 ]. Previous studies indicated that overexpression of SPL13 inhibits the growth of axillary buds and reduces the number of lateral branches [ 56 ]. We found in this study that the SPL4 and SPL9 genes were significantly downregulated after the fruit-thinning treatment ( Figure 10 ).…”

Section: Discussionmentioning

confidence: 99%

Comprehensive Evolutionary Analysis of the SMXL Gene Family in Rosaceae: Further Insights into Its Origin, Expansion, Diversification, and Role in Regulating Pear Branching

Liu,

Jiang,

Liu

et al. 2024

IJMS

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SMXL genes constitute a conserved gene family that is ubiquitous in angiosperms and involved in regulating various plant processes, including branching, leaf elongation, and anthocyanin biosynthesis, but little is known about their molecular functions in pear branching. Here, we performed genome-wide identification and investigation of the SMXL genes in 16 angiosperms and analyzed their phylogenetics, structural features, conserved motifs, and expression patterns. In total, 121 SMXLs genes were identified and were classified into four groups. The number of non-redundant SMXL genes in each species varied from 3 (Amborella trichopoda Baill.) to 18 (Glycine max Merr.) and revealed clear gene expansion events over evolutionary history. All the SMXL genes showed conserved structures, containing no more than two introns. Three-dimensional protein structure prediction revealed distinct structures between but similar structures within groups. A quantitative real-time PCR analysis revealed different expressions of 10 SMXL genes from pear branching induced by fruit-thinning treatment. Overall, our study provides a comprehensive investigation of SMXL genes in the Rosaceae family, especially pear. The results offer a reference for understanding the evolutionary history of SMXL genes and provide excellent candidates for studying fruit tree branching regulation, and in facilitating pear pruning and planting strategies.

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Section: Discussionmentioning

confidence: 99%

Comprehensive Evolutionary Analysis of the SMXL Gene Family in Rosaceae: Further Insights into Its Origin, Expansion, Diversification, and Role in Regulating Pear Branching

Liu,

Jiang,

Liu

et al. 2024

IJMS

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“…Most of the genes significantly decrease at the transcriptional level on activation of axillary buds, which implies that TIFY family genes may be involved in the regulation of branch development. It has been reported that JA negatively regulates the branch growth of pear trees and JA downstream regulatory genes play crucial roles in the regulation of branching [62]. Rapeseed is an important oil crop, and the number of branches determines the number of siliques and ultimately determines yield.…”

Section: Discussionmentioning

confidence: 99%

New Insights into the TIFY Gene Family of Brassica napus and Its Involvement in the Regulation of Shoot Branching

Li,

Zhang,

Wang

et al. 2023

IJMS

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As plant-specific transcription factors, the TIFY family genes are involved in the responses to a series of biotic and abiotic stresses and the regulation of the development of multiple organs. To explore the potential roles of the TIFY gene family in shoot branching, which can shape plant architecture and finally determine seed yield, we conducted comprehensive genome-wide analyses of the TIFY gene family in Brassica napus. Here, HMMER search and BLASTp were used to identify the TIFY members. A total of 70 TIFY members were identified and divided into four subfamilies based on the conserved domains and motifs. These TIFY genes were distributed across 19 chromosomes. The predicted subcellular localizations revealed that most TIFY proteins were located in the nucleus. The tissue expression profile analyses indicated that TIFY genes were highly expressed in the stem, flower bud, and silique at the transcriptional level. High-proportioned activation of the dormant axillary buds on stems determined the branch numbers of rapeseed plants. Here, transcriptome analyses were conducted on axillary buds in four sequential developing stages, that is, dormant, temporarily dormant, being activated, and elongating (already activated). Surprisingly, the transcription of the majority of TIFY genes (65 of the 70) significantly decreased on the activation of buds. GO enrichment analysis and hormone treatments indicated that the transcription of TIFY family genes can be strongly induced by jasmonic acid, implying that the TIFY family genes may be involved in the regulation of jasmonic acid-mediated branch development. These results shed light on the roles of TIFY family genes in plant architecture.

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“…Furthermore, the levels of jasmonates, including jasmonic acid (JA) and jasmonoyl-isoleucine (JA-Ile), tended to gradually decrease throughout the chilling accumulation period (Gao et al, 2021). A recent study found that jasmonic acid is negatively correlated with vegetative growth, specifically branch growth of pear trees, and suggests that genes related to the jasmonic acid pathway play a critical role in branching regulation (Cheng et al, 2023). These studies indicate the importance of JA in response to chilling exposure and the regulation of vegetative growth cessation, as well as the resumption of growth after the dormancy break (Table 2).…”

Section: Phytohormonesmentioning

confidence: 99%

Genetic and molecular regulation of chilling requirements in pear: breeding for climate change resilience

Gabay,

Flaishman

2024

Front. Plant Sci.

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Pear (Pyrus spp.) is a deciduous fruit tree that requires exposure to sufficient chilling hours during the winter to establish dormancy, followed by favorable heat conditions during the spring for normal vegetative and floral budbreak. In contrast to most temperate woody species, apples and pears of the Rosaceae family are insensitive to photoperiod, and low temperature is the major factor that induces growth cessation and dormancy. Most European pear (Pyrus Communis L.) cultivars need to be grown in regions with high chilling unit (CU) accumulation to ensure early vegetative budbreak. Adequate vegetative budbreak time will ensure suitable metabolite accumulation, such as sugars, to support fruit set and vegetative development, providing the necessary metabolites for optimal fruit set and development. Many regions that were suitable for pear production suffer from a reduction in CU accumulation. According to climate prediction models, many temperate regions currently suitable for pear cultivation will experience a similar accumulation of CUs as observed in Mediterranean regions. Consequently, the Mediterranean region can serve as a suitable location for conducting pear breeding trials aimed at developing cultivars that will thrive in temperate regions in the decades to come. Due to recent climatic changes, bud dormancy attracts more attention, and several studies have been carried out aiming to discover the genetic and physiological factors associated with dormancy in deciduous fruit trees, including pears, along with their related biosynthetic pathways. In this review, current knowledge of the genetic mechanisms associated with bud dormancy in European pear and other Pyrus species is summarized, along with metabolites and physiological factors affecting dormancy establishment and release and chilling requirement determination. The genetic and physiological insights gained into the factors regulating pear dormancy phase transition and determining chilling requirements can accelerate the development of new pear cultivars better suited to both current and predicted future climatic conditions.

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Jasmonic acid negatively regulates branch growth in pear

Cited by 6 publications

References 58 publications

Comprehensive Evolutionary Analysis of the SMXL Gene Family in Rosaceae: Further Insights into Its Origin, Expansion, Diversification, and Role in Regulating Pear Branching

Comprehensive Evolutionary Analysis of the SMXL Gene Family in Rosaceae: Further Insights into Its Origin, Expansion, Diversification, and Role in Regulating Pear Branching

New Insights into the TIFY Gene Family of Brassica napus and Its Involvement in the Regulation of Shoot Branching

Genetic and molecular regulation of chilling requirements in pear: breeding for climate change resilience

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