Contents of endogenous brassinosteroids and the response to drought and/or exogenously applied 24-epibrassinolide in two different maize leaves

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F23%3A00575385" target="_blank" >RIV/61389030:_____/23:00575385 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/23:10465463 RIV/61989592:15310/23:73622935

Result on the web

<a href="https://doi.org/10.3389/fpls.2023.1139162" target="_blank" >https://doi.org/10.3389/fpls.2023.1139162</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fpls.2023.1139162" target="_blank" >10.3389/fpls.2023.1139162</a>

Result language

angličtina

Original language name

Contents of endogenous brassinosteroids and the response to drought and/or exogenously applied 24-epibrassinolide in two different maize leaves

Original language description

Exogenously applied brassinosteroids (BRs) improve plant response to drought. However, many important aspects of this process, such as the potential differences caused by different developmental stages of analyzed organs at the beginning of drought, or by BR application before or during drought, remain still unexplored. The same applies for the response of different endogenous BRs belonging to the C-27, C-28-and C-29- structural groups to drought and/or exogenous BRs. This study examines the physiological response of two different leaves (younger and older) of maize plants exposed to drought and treated with 24-epibrassinolide (epiBL), together with the contents of several C-27, C-28-and C-29-BRs. Two timepoints of epiBL application (prior to and during drought) were utilized to ascertain how this could affect plant drought response and the contents of endogenous BRs. Marked differences in the contents of individual BRs between younger and older maize leaves were found: the younger leaves diverted their BR biosynthesis from C-28-BRs to C-29-BRs, probably at the very early biosynthetic steps, as the levels of C-28-BR precursors were very low in these leaves, whereas C-29-BR levels vere extremely high. Drought also apparently negatively affected contents of C-28-BRs (particularly in the older leaves) and C-29-BRs (particularly in the younger leaves) but not C-27-BRs. The response of these two types of leaves to the combination of drought exposure and the application of exogenous epiBL differed in some aspects. The older leaves showed accelerated senescence under such conditions reflected in their reduced chlorophyll content and diminished efficiency of the primary photosynthetic processes. In contrast, the younger leaves of well-watered plants showed at first a reduction of proline levels in response to epiBL treatment, whereas in drought-stressed, epiBL pre-treated plants they were subsequently characterized by elevated amounts of proline. The contents of C-29- and C-27-BRs in plants treated with exogenous epiBL depended on the length of time between this treatment and the BR analysis regardless of plant water supply, they were more pronounced in plants subjected to the later epiBL treatment. The application of epiBL before or during drought did not result in any differences of plant response to this stressor.

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%2F0000738" target="_blank" >EF16_019/0000738: Centre for Experimental Plant Biology</a><br>

Continuities

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

Publication year

2023

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

1664-462X

Volume of the periodical

14

Issue of the periodical within the volume

JUN 2

Country of publishing house

CH - SWITZERLAND

Number of pages

22

Pages from-to

1139162

UT code for WoS article

001006381200001

EID of the result in the Scopus database

2-s2.0-85161977734