Plant hormones (Literature sources on phytohormones and plant signalling)
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Transcriptional regulation of tomato fruit quality - Review

Transcriptional regulation of tomato fruit quality - Review | Plant hormones (Literature sources on phytohormones and plant signalling) | Scoop.it
Authors: Hongli Li, Gangshuai Liu and Daqi Fu.

Postharvest Biology and Technology (2023)

Highlights: • Tomato serves as the model plant for studying fruit quality formation. • Fruit quality formation is regulated by a series of transcription factors. • Interactions between transcription factors related to fruit quality. 

Abstract: "Tomato serves as the model plant for studying fruit ripening and quality formation including pigment, texture, flavor, aroma and nutrition. The ripening of tomato fruit results from the selective expression of ripening-related genes, which are strictly regulated by transcription factors (TFs), such as RIPENING INHIBITOR (RIN), NON-RIPENING (NOR) and COLORLESS NON-RIPENING (CNR). Understanding the transcriptional network has important biological significance for the fruit ripening regulation, which can help improve fruit quality and commodity value, and improve the utilization of agricultural resources. The molecular mechanism of TF control, a redundant regulatory network, has been extensively studied thanks to advancements in scientific research technologies. Here, we focus on the synergistic or antagonistic regulation of TFs in tomato fruit ripening, including the relationship between TFs and the regulatory patterns of ripening-related target genes, which is supported by sufficient evidence."
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Long Noncoding RNA MdLNC499 Bridges MdWRKY1 and MdERF109 Function to Regulate Early-Stage Light-Induced Anthocyanin Accumulation in Apple Fruit  

Long Noncoding RNA MdLNC499 Bridges MdWRKY1 and MdERF109 Function to Regulate Early-Stage Light-Induced Anthocyanin Accumulation in Apple Fruit   | Plant hormones (Literature sources on phytohormones and plant signalling) | Scoop.it

Authors: Huaying Ma, Tuo Yang, Yu Li, Jie Zhang, Ting Wu, Tingting Song, Yuncong Yao and Ji Tian.


The Plant Cell (2021)


Abstract: "Anthocyanin pigments contribute to plant coloration and are valuable sources of antioxidants in the human diet as components of fruits and vegetables. Their production is known to be induced by light in (Malus domestica) apple fruit; however, the underlying molecular mechanism responsible for early-stage light-induced anthocyanin biosynthesis remains unclear. Here, we identified an ERF (ethylene response factor) protein, ERF109, involved in light-induced anthocyanin biosynthesis and found that it promotes coloration by directly binding to anthocyanin-related gene promoters. Promoter::GUS (β-glucuronidase) reporter analysis and Hi-C sequencing showed that a long non-coding RNA (lncRNA), MdLNC499, located upstream from MdERF109, induces the expression of MdERF109. A W-box cis-element in the MdLNC499 promoter was found to be regulated by a transcription factor, MdWRKY1. Transient expression in apple fruit and stable transformation of apple calli allowed us to reconstruct a MdWRKY1-MdLNC499-MdERF109 transcriptional cascade in which MdWRKY1 is activated by light to increase the transcription of MdLNC499, which in turn induces MdERF109. The MdERF109 protein induces the expression of anthocyanin-related genes and the accumulation of anthocyanins in the early stages of apple coloration. Our results provide a platform for better understanding the various regulatory mechanisms involved in light-induced apple fruit coloration."

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