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Lycopene beta-cyclase expression influences plant physiology, development, and metabolism in tobacco plants

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F21%3A73610444" target="_blank" >RIV/61989592:15310/21:73610444 - isvavai.cz</a>

  • Result on the web

    <a href="https://academic.oup.com/jxb/article/72/7/2544/6116658" target="_blank" >https://academic.oup.com/jxb/article/72/7/2544/6116658</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1093/jxb/erab029" target="_blank" >10.1093/jxb/erab029</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Lycopene beta-cyclase expression influences plant physiology, development, and metabolism in tobacco plants

  • Original language description

    Carotenoids are important isoprenoids produced in the plastids of photosynthetic organisms that play key roles in photoprotection and antioxidative processes. beta-Carotene is generated from lycopene by lycopene beta-cyclase (LCYB). Previously, we demonstrated that the introduction of the Daucus carota (carrot) DcLCYB1 gene into tobacco (cv. Xanthi) resulted in increased levels of abscisic acid (ABA) and especially gibberellins (GAs), resulting in increased plant yield. In order to understand this phenomenon prior to exporting this genetic strategy to crops, we generated tobacco (Nicotiana tabacum cv. Petit Havana) mutants that exhibited a wide range of LCYB expression. Transplastomic plants expressing DcLCYB1 at high levels showed a wild-type-like growth, even though their pigment content was increased and their leaf GA1 content was reduced. RNA interference (RNAi) NtLCYB lines showed different reductions in NtLCYB transcript abundance, correlating with reduced pigment content and plant variegation. Photosynthesis (leaf absorptance, Fv/Fm, and light-saturated capacity of linear electron transport) and plant growth were impaired. Remarkably, drastic changes in phytohormone content also occurred in the RNAi lines. However, external application of phytohormones was not sufficient to rescue these phenotypes, suggesting that altered photosynthetic efficiency might be another important factor explaining their reduced biomass. These results show that LCYB expression influences plant biomass by different mechanisms and suggests thresholds for LCYB expression levels that might be beneficial or detrimental for plant growth.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10611 - Plant sciences, botany

Result continuities

  • Project

    <a href="/en/project/GA18-10349S" target="_blank" >GA18-10349S: Gibberellin biosynthesis and signal transduction – identification of novel targets for plant growth regulation</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2021

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    JOURNAL OF EXPERIMENTAL BOTANY

  • ISSN

    0022-0957

  • e-ISSN

  • Volume of the periodical

    72

  • Issue of the periodical within the volume

    7

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    26

  • Pages from-to

    2544-2569

  • UT code for WoS article

    000639080100023

  • EID of the result in the Scopus database

    2-s2.0-85104827778