Nitrogen Deficiency Accelerates Rice Leaf Senescence Through ABA Signaling and Sugar Metabolic Shifts

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F25%3AA2603AAW" target="_blank" >RIV/61988987:17310/25:A2603AAW - isvavai.cz</a>

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/10.1111/ppl.70124" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1111/ppl.70124</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/ppl.70124" target="_blank" >10.1111/ppl.70124</a>

Result language

angličtina

Original language name

Nitrogen Deficiency Accelerates Rice Leaf Senescence Through ABA Signaling and Sugar Metabolic Shifts

Original language description

Nitrogen (N) deficiency is one of the critical factors that induce leaf senescence by integrating with abscisic acid (ABA) metabolism, which results in a shortened leaf photosynthetic period and markedly lowered grain yield. However, the metabolic pathway by which ABA signaling participates in the regulation of senescence‐associated change in sugar metabolism and its relationship with N allocation in plant tissues are not well understood. In this paper, the effect of supply level on leaf C/N allocation and its relation to ABA signalling, sugar metabolism, and N assimilation were investigated by using two rice genotypes subjected to four N treatments. Results indicated that N‐deficiency markedly induced PYR1‐like (PYL) expression and ABA biosynthesis, consequently leading to the activation of ABA signaling. The increased ABA concentration in leaf tissues triggered the catabolic pathways of sugar and N metabolisms, resulting in the reduced photosynthetic pigments and intensified oxidative damage in N‐deficient leaves. ABA signaling induced by N‐deficiency upregulates the expression of senescence‐associated genes (SAGs) and C/N allocation by mediating several senescence‐promoting factors, such as NAC, bZIP, and WRKY TFs, along with the suppression of PP2Cs. Therefore, N‐deficiency impairs chlorophyll biosynthesis and triggers chlorophyll degradation to accelerate the timing and rate of leaf senescence. This metabolic network could provide helpful information for understanding the regulatory mechanism of leaf senescence in relation to sugar signaling, N‐assimilation and N‐use efficiency.

Czech name

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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

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OECD FORD branch

10611 - Plant sciences, botany

Project

—

Continuities

O - Projekt operacniho programu

Publication year

2025

Confidentiality

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

Name of the periodical

PHYSIOL PLANTARUM

ISSN

0031-9317

e-ISSN

1399-3054

Volume of the periodical

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Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

18

Pages from-to

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UT code for WoS article

001424737800001

EID of the result in the Scopus database

2-s2.0-85218948631