Molecular Networks Regulating Seed Maturation, After-Ripening, Dormancy and Germination

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Molecular Biology".

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 1134

Special Issue Editor


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Departamento de Biología Funcional (Área Fisiología Vegetal), Facultad de Farmacia, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain
Interests: molecular and physiological aspects of seeds development
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Special Issue Information

Dear Colleagues,

Understanding the molecular mechanisms underlying seed life that allow seeds to be properly constituted, arrest embryo growth (i.e., seed dormancy), and ultimately germinate under favourable conditions, constitutes an important topic in plant molecular biology. Transcriptional and post-transcriptional regulation of gene expression play key roles in a wide range of plant life processes and stages. This is the case of seed life, which requires highly coordinated gene expression triggering molecular changes involving various metabolic pathways. All these coordinating mechanisms are in their great majority, governed and led by the content and/or sensitivity of plant hormones, being ABA, gibberellins and ethylene the most committed. However, the effect of other endogenous and environmental factors should not be ruled out. The seed dry storage (i.e., after-ripening) regulates seed dormancy by specific transcriptional programs that induce changes in signaling and seed hormones whose balances are modulated by other hormones such as jasmonates and salicylic acid. This Special Issue will explore advancements in the regulatory mechanisms underlying development and maturation, dormancy, after-ripening and germination of seeds.

Prof. Dr. Angel J. Matilla
Guest Editor

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Keywords

  • after-ripening
  • dormancy
  • endosperm
  • hormonal networks
  • germination
  • hormonal signaling
  • seed development
  • seed (gen)omic
  • seed maturation
  • transcription factors

Published Papers (1 paper)

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Research

16 pages, 2816 KiB  
Article
OsSCYL2 is Involved in Regulating ABA Signaling-Mediated Seed Germination in Rice
by Minyan Xu, Wei Zhang, Yuhuan Jiao, Qing Yang, Meng Chen, Hu Cheng, Beijiu Cheng and Xin Zhang
Plants 2024, 13(8), 1088; https://doi.org/10.3390/plants13081088 - 12 Apr 2024
Viewed by 790
Abstract
Seed germination represents a multifaceted biological process influenced by various intrinsic and extrinsic factors. In the present study, our investigation unveiled the regulatory role of OsSCYL2, a gene identified as a facilitator of seed germination in rice. Notably, the germination kinetics of [...] Read more.
Seed germination represents a multifaceted biological process influenced by various intrinsic and extrinsic factors. In the present study, our investigation unveiled the regulatory role of OsSCYL2, a gene identified as a facilitator of seed germination in rice. Notably, the germination kinetics of OsSCYL2-overexpressing seeds surpassed those of their wild-type counterparts, indicating the potency of OsSCYL2 in enhancing this developmental process. Moreover, qRT-PCR results showed that OsSCYL2 was consistently expressed throughout the germination process in rice. Exogenous application of ABA on seeds and seedlings underscored the sensitivity of OsSCYL2 to ABA during both seed germination initiation and post-germination growth phases. Transcriptomic profiling following OsSCYL2 overexpression revealed profound alterations in metabolic pathways, MAPK signaling cascades, and phytohormone-mediated signal transduction pathways, with 15 genes related to the ABA pathways exhibiting significant expression changes. Complementary in vivo and in vitro assays unveiled the physical interaction between OsSCYL2 and TOR, thereby implicating OsSCYL2 in the negative modulation of ABA-responsive genes and its consequential impact on seed germination dynamics. This study elucidated novel insights into the function of OsSCYL2 in regulating the germination process of rice seeds through the modulation of ABA signaling pathways, thereby enhancing the understanding of the functional significance of the SCYL protein family in plant physiological processes. Full article
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