Transcriptome and Anatomical Comparisons Reveal the Effects of Methyl Jasmonate on the Seed Development of <i>Camellia oleifera</i>

Song, Qiling; Gong, Wenfang; Yu, Xinran; Ji, Ke; Jiang, Yi; Chang, Yihong; Yuan, Deyi

doi:10.1021/acs.jafc.3c00059

Cited by 4 publications

(1 citation statement)

References 98 publications

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“…In addition, MeJA was applied to spring wheat with insensitivity to vernalization, and the treatment delayed its flowering, which once again proved the role of MeJA in regulating vernalization and flowering time. Similarly, during seed development, CoMYC2, a key transcription factor in the JA signal transduction pathway, can directly interact with three hub genes related to the seed size: CoCDKB2-3 , CoCYCB2-3 , and CoXTH9 [ 39 ].…”

Section: Ja Regulationmentioning

confidence: 99%

Effects of Jasmonic Acid on Stress Response and Quality Formation in Vegetable Crops and Their Underlying Molecular Mechanisms

Wu,

Chen,

et al. 2024

Plants

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The plant hormone jasmonic acid plays an important role in plant growth and development, participating in many physiological processes, such as plant disease resistance, stress resistance, organ development, root growth, and flowering. With the improvement in living standards, people have higher requirements regarding the quality of vegetables. However, during the growth process of vegetables, they are often attacked by pests and diseases and undergo abiotic stresses, resulting in their growth restriction and decreases in their yield and quality. Therefore, people have found many ways to regulate the growth and quality of vegetable crops. In recent years, in addition to the role that JA plays in stress response and resistance, it has been found to have a regulatory effect on crop quality. Therefore, this study aims to review the jasmonic acid accumulation patterns during various physiological processes and its potential role in vegetable development and quality formation, as well as the underlying molecular mechanisms. The information provided in this manuscript sheds new light on the improvements in vegetable yield and quality.

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Section: Ja Regulationmentioning

confidence: 99%

Effects of Jasmonic Acid on Stress Response and Quality Formation in Vegetable Crops and Their Underlying Molecular Mechanisms

Wu,

Chen,

et al. 2024

Plants

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Sugar import mediated by sugar transporters and cell wall invertases for seed development in Camellia oleifera

Du,

Cao,

Zhou

et al. 2024

Horticulture Research

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Seed development and yield depend on the transport and supply of sugar. However, an insufficient supply of nutrients from maternal tissues to embryos results in seed abortion and yield reduction in Camellia oleifera. In this study, we systematically examined the route and regulatory mechanisms of sugar import into developing C. oleifera seeds using a combination of histological observations, transcriptome profiling and functional analysis. Labelling with the tracer carboxyfluorescein revealed a symplasmic route in the integument and an apoplasmic route for post-phloem transport at the maternal-filial interface. Enzymatic activity and histological observation showed that at early stages (180-220 DAP) of embryo differentiation, the high hexose/sucrose ratio was primarily mediated by acid invertases and the micropylar endosperm/suspensor provides a channel for sugar import. Through Camellia genomic profiling, we identified three plasma membrane-localized proteins including CoSWEET1b, CoSWEET15 and CoSUT2 and one tonoplast-localized protein CoSWEET2a in seeds and verified their ability to transport various sugars via transformation in yeast mutants and calli. In situ hybridization and profiling of glycometabolism-related enzymes further demonstrated that CoSWEET15 functions as a micropylar endosperm-specific gene, together with the cell wall acid invertase CoCWIN9, to support early embryo development, while CoSWEET1b, CoSWEET2a and CoSUT2 function at transfer cells and chalazal nucellus coupled with CoCWIN9 and CoCWIN11 responsible for sugar entry in bulk into the filial tissue. Collectively, our findings provide the first comprehensive evidence of the molecular regulation of sugar import into and within C. oleifera seeds and provide a new target for manipulating seed development.

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The gapless genome assembly and multi-omics analyses unveil a pivotal regulatory mechanism of oil biosynthesis in the olive tree

Lv,

Jiang,

et al. 2024

Horticulture Research

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Olive is a valuable oil-bearing tree with fruits containing high levels of fatty acids. The oil production is a multifaceted process involving intricate interactions between fatty acid biosynthesis and other metabolic pathways that are affected by genetics and the developmental stages of the fruit. However, a comprehensive understanding of the underlying regulatory mechanisms is still lacking. Here, we generated a gap-free telomere-to-telomere assembly for O. europaea cv. Leccino, representing the highest contiguity and completeness olive genome to date. The combination of time-course metabolomics and transcriptomics datasets revealed a negative correlation between fatty acid and flavonoid biosynthesis in the initial phase of olive fruit development, which was subject to an opposing regulatory mechanism mediated by the hub transcription factor MYC2. Multifaceted molecular assays demonstrated that MYC2 is a repressor of fatty acid biosynthesis by downregulating the expression of BCCP2 (biotin carboxylase carrier protein 2). While it acts as an activator of FLS (flavonol synthase), leading to an increase in flavonoid synthesis. Furthermore, the expression of MYC2 is regulated by fluctuations of methyl jasmonate (MeJA) content during olive fruit development. Together, our study completed a high-quality gapless genome of olive cultivar, and shed new insight into the regulatory mechanisms underlying the biosynthesis of fatty acids and flavonoids in its fruit.

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Transcriptome and Anatomical Comparisons Reveal the Effects of Methyl Jasmonate on the Seed Development of Camellia oleifera

Cited by 4 publications

References 98 publications

Effects of Jasmonic Acid on Stress Response and Quality Formation in Vegetable Crops and Their Underlying Molecular Mechanisms

Effects of Jasmonic Acid on Stress Response and Quality Formation in Vegetable Crops and Their Underlying Molecular Mechanisms

Sugar import mediated by sugar transporters and cell wall invertases for seed development in Camellia oleifera

The gapless genome assembly and multi-omics analyses unveil a pivotal regulatory mechanism of oil biosynthesis in the olive tree

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