Hormone Metabolism and Signaling in Rice

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Plant-Crop Biology and Biochemistry".

Deadline for manuscript submissions: closed (30 September 2024) | Viewed by 1041

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Department of Agronomy, College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
Interests: cytokinin; metabolism; signaling; rice
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Special Issue Information

Dear Colleagues,

Rice, one of the paramount cereal crops globally, undergoes meticulous regulation of phytohormones throughout its growth and developmental stages. A comprehensive investigation into phytohormone metabolism and signal transduction networks in rice is instrumental in elucidating rice growth, augmenting yield, and bolstering stress resilience. In recent years, remarkable strides have been made in the realm of phytohormone metabolism in rice, propelled by advances in molecular biology, biochemistry, and bioinformatics methodologies. Researchers have unveiled the synthesis, degradation, transport, and signal transduction pathways of diverse phytohormones in rice, while also exploring the intricate interplay among different hormone species. Simultaneously, artificially synthesized growth regulators are extensively utilized to modulate crop growth, enhance yield, and ameliorate quality.

In this Special Issue, we aim to exchange knowledge on any aspect related to rice hormone metabolism and signal transduction, aiming to achieve precise control over rice growth and development processes, and enhance rice resistance to adversity.

Prof. Dr. Chengqiang Ding
Guest Editor

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Keywords

  • rice
  • plant hormones
  • signaling
  • response
  • growth and development
  • plant resistance

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Published Papers (1 paper)

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Research

14 pages, 3189 KiB  
Article
OsABT Negatively Regulates the Abscisic Acid Signal Transduction Pathway in Rice Seedling Roots
by Lingran Bao, Yi Shen, Yijie Yan, Xuanzhu Huang, Danni Wen and Bo Shen
Agronomy 2024, 14(11), 2683; https://doi.org/10.3390/agronomy14112683 - 14 Nov 2024
Viewed by 723
Abstract
Rice (Oryza sativa L.) is a main food crop in China and is crucial for the maintenance of national food security. The growth of rice seedling roots is regulated by a variety of genes and is closely related to abscisic acid (ABA) [...] Read more.
Rice (Oryza sativa L.) is a main food crop in China and is crucial for the maintenance of national food security. The growth of rice seedling roots is regulated by a variety of genes and is closely related to abscisic acid (ABA) metabolism and ABA signaling pathways. In this study, we found that OsABT could increase the length of rice root tip meristem cells and upregulate root development-related genes, thereby alleviating ABA’s inhibitory effects on rice root growth and seed germination. The overexpression of OsABT reduced the ABA content by downregulating ABA synthesis genes (OsNCED3 and OsNCED5) and upregulating the ABA catabolic gene (OsABA8ox2). In addition, OsABT interacted with OsPYL4, OsPYL10, and OsABIL2 via the ABA signal transduction pathway. By inhibiting the expression of positive regulatory genes (OsPYL9 and Rab16a) and increasing the expression of a negative regulatory gene (OsABIL1), OsABT negatively regulates the ABA signal transduction pathway. Transcriptome analysis revealed that OsABT inhibited the activity of Gene Ontology entries in response to ABA. Thus, OsABT increased the length of the rice root meristem, reduced the accumulation of ABA in the roots, and negatively regulated the ABA signal transduction pathway by interacting with key proteins in this pathway, ultimately relieving the inhibitory effect of ABA on rice root length and seed germination. Full article
(This article belongs to the Special Issue Hormone Metabolism and Signaling in Rice)
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