Evidence map›Paper›PMID 28597434›Full record

ArticleBotanical studies2016

Ectopic expression of Lc differentially regulated anthocyanin biosynthesis in the floral parts of tobacco (Nicotiana tobacum L.) plants.

Zong-An Huang, Ting Zhao, Ning Wang, Shu-Song Zheng

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Article in Botanical studies, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

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13citing papers in PubMed
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3 · Its place in the literature

Who cites it

13 citing papers in PubMed.

  1. Article
  2. Morphological Characterization ofPlants (Basel, Switzerland) · 2023
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4 · The record

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5 · Who and what money

Authors and funding

4 authors.

Zong-An HuangState Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, West Beichen Road 1, Chaoyang District, Beijing, 100101, China.
Ting ZhaoState Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, West Beichen Road 1, Chaoyang District, Beijing, 100101, China.
Ning WangState Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, West Beichen Road 1, Chaoyang District, Beijing, 100101, China.
Shu-Song ZhengState Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, West Beichen Road 1, Chaoyang District, Beijing, 100101, China. shusong@genetics.ac.cn.ORCID http://orcid.org/0000-0001-8074-1009

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAnthocyanins are the conspicuous pigments of flowering plants and participate in several aspects of plant development and defense, such as seeds and pollens dispersal. Leaf colour (Lc) is the first basic/helix-loop-helix (bHLH) transcription factor controlling anthocyanin biosynthesis isolated from maize (Zea mays L.). Ectopic expression of maize Lc enhanced anthocyanin biosynthesis in many plants including tobacco (Nicotiana tobacum L.). However, the molecular regulatory mechanism of anthocyanin biosynthesis in the different floral parts of tobacco remains largely unknown. Therefore, the molecular and biochemical characterization of anthocyanin biosynthesis were investigated in the flowers of both wild type and Lc-transgenic tobacco plants.

resultsAt the reproductive stage, with respect to the different parts of the flowers in wild type SR1, the calyxes and the pistils were green, and the petals and the filaments showed light pink pigmentation; the Lc-transgenic tobacco exhibited light red in calyxes and crimson in petals and in filaments respectively. Correspondingly, the total anthocyanin contents (TAC) in calyxes, petals and filaments of Lc-transgenic plants were much higher than that of the counterparts in SR1. Though the TAC in anthers of Lc-transgenic plants was low, it was still significantly higher than that of SR1. SR1 has almost the same TAC in the pistils as Lc-transgenic plants. Consistent with the intense phenotype and the increased TAC, Lc was weakly expressed in the calyxes and strongly expressed in petals and filaments of Lc-transgenic plants, while Lc was not detected in SR1. The expression level of NtAN2 in petals was similar between SR1 and Lc-transgenic lines. In agreement with the expression profile of Lc, both early (NtCHS) and late anthocyanin-biosynthetic genes (NtDFR, NtF3'H, and NtANS) were coordinately up-regulated in the counterparts of flowers. HPLC analysis demonstrated that the cyanidin (Cya) deposition was mainly responsible for the intense pigmentation of Lc-transgenic tobacco.

conclusionsEctopic expression of Lc greatly enhanced both early- and late- anthocyanin-biosynthetic gene expression, and therefore resulted in the Cya-based TAC increase in the calyxes, the filaments and the petals in tobacco plants.

Indexed as

Anthocyanin-biosynthetic genesCyanidinFlower colourLcTobacco (Nicotiana tobacum L.)

Identifiers

PMID28597434
PMCPMC5432909

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