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Development of erect leaves in a modern maize hybrid is associated with reduced responsiveness to auxin and light of young seedlings in vitro.

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F06%3A00003356" target="_blank" >RIV/61989592:15310/06:00003356 - isvavai.cz</a>

  • Alternative codes found

    RIV/61389030:_____/06:00082255

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Development of erect leaves in a modern maize hybrid is associated with reduced responsiveness to auxin and light of young seedlings in vitro.

  • Original language description

    Modern corn (Zea mays L.) varieties have been selected for their ability to maintain productivity in dense plantings. We have tested the possibility that the physiological consequence of the selection involves changes in responsiveness to light and auxin. Etiolated seedlings of two older corn hybrids 307 and 3306 elongated significantly more than seedlings of a modern corn hybrid 3394. The level of endogenous auxin and activity of PAT in 307 and 3394 were similar. Hybrid 3394 shows resistance to auxin-and light-induced responses at the seedling, cell, and molecular levels. Intact 3394 plants exhibited less responsiveness to the inhibitory effect of R, FR, and W, auxin, antiauxin, and inhibitors of PAT. In excised mesocotyl tissue 3394 seedlings also showed essentially low responsiveness to NAA. Cells of 3394 were insensitive to auxin- and light-induced hyperpolarization of the plasma membrane. Expression of ABP4 was much less in 3394 than in 307, and in contrast to 307, it was not upr

  • Czech name

    Vývoj vzpřímených listů u moderních hybridů kukuřice je associována se sníženou vnímavostí mladých rostlin vůči auxinu a světlu v podmínkách in vitro.

  • Czech description

    Moderní hybridy kukuřice (Zea mays L.) byly vyselektovány pro jejich schopnost produkce i při vysoké hustotě výsevu. Testovali jsme možnost, že mezi fyziologické důsledky selekce patří i změna v citlivosti hybridů ke světlu a auxinu. Etiolizované rostliny dvou starších hybridů 307 a 3306 byly delší než rostliny moderního hybridu 3394. Hladina endogenního auxinu a aktivita PAT byla podobná u 307 a 3394. Hybrid 3394 ukazoval rezistenci k reakcím indukovaným auxinem a světlem, a to jak na úrovni celých rostlin, tak na buněčné a molekulární úrovni. Intaktní rostliny 3394 se dále vyznačovaly sníženou citlivostí k inhibičnímu účinku R, FR a W, auxinu, antiauxinu a inhibitorů polárního transportu auxinu. Mezokotylové segmenty hybrida 3394 rovněž vykazovaly nízkou reakci k NAA. Buňky 3394 byly necitlivé k auxinem a světlem indukované hyperpolarizaci plazma membrány. Exprese ABP4 byla mnohem nižší u hybrida 3394 než u 307, a na rozdíl od 307, se exprese tohoto genu nezvyšovala po ovlivnění NAA,

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    EB - Genetics and molecular biology

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/1P05ME792" target="_blank" >1P05ME792: Interaction between auxin and light signaling in seedling growth and development of leaf in corn</a><br>

  • Continuities

    S - Specificky vyzkum na vysokych skolach

Others

  • Publication year

    2006

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Plant Signaling and Behavior

  • ISSN

    1559-2316

  • e-ISSN

  • Volume of the periodical

    1

  • Issue of the periodical within the volume

    4

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    11

  • Pages from-to

    201-211

  • UT code for WoS article

  • EID of the result in the Scopus database