ACAULIS5 Is Required for Cytokinin Accumulation and Function During Secondary Growth of Populus Trees

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F20%3A00539867" target="_blank" >RIV/61389030:_____/20:00539867 - isvavai.cz</a>

Alternative codes found

RIV/61989592:15310/20:73604708

Result on the web

<a href="http://doi.org/10.3389/fpls.2020.601858" target="_blank" >http://doi.org/10.3389/fpls.2020.601858</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fpls.2020.601858" target="_blank" >10.3389/fpls.2020.601858</a>

Result language

angličtina

Original language name

ACAULIS5 Is Required for Cytokinin Accumulation and Function During Secondary Growth of Populus Trees

Original language description

In the primary root and young hypocotyl of Arabidopsis, ACAULIS5 promotes translation of SUPPRESSOR OF ACAULIS51 (SAC51) and thereby inhibits cytokinin biosynthesis and vascular cell division. In this study, the relationships between ACAULIS5, SAC51 and cytokinin biosynthesis were investigated during secondary growth of Populus stems. Overexpression of ACAULIS5 from the constitutive 35S promoter in hybrid aspen (Populus tremula × Populus tremuloides) trees suppressed the expression level of ACAULIS5, which resulted in low levels of the physiologically active cytokinin bases as well as their direct riboside precursors in the transgenic lines. Low ACAULIS5 expression and low cytokinin levels of the transgenic trees coincided with low cambial activity of the stem. ACAULIS5 therefore, contrary to its function in young seedlings in Arabidopsis, stimulates cytokinin accumulation and cambial activity during secondary growth of the stem. This function is not derived from maturing secondary xylem tissues as transgenic suppression of ACAULIS5 levels in these tissues did not influence secondary growth. Interestingly, evidence was obtained for increased activity of the anticlinal division of the cambial initials under conditions of low ACAULIS5 expression and low cytokinin accumulation. We propose that ACAULIS5 integrates auxin and cytokinin signaling to promote extensive secondary growth of tree stems.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10608 - Biochemistry and molecular biology

Project

<a href="/en/project/EF16_019%2F0000827" target="_blank" >EF16_019/0000827: Plants as a tool for sustainable global development</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Frontiers in Plant Science

ISSN

1664-462X

e-ISSN

—

Volume of the periodical

11

Issue of the periodical within the volume

NOV 16

Country of publishing house

CH - SWITZERLAND

Number of pages

11

Pages from-to

601858

UT code for WoS article

000593932900001

EID of the result in the Scopus database

2-s2.0-85096938631