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Regulation of Growth and Flowering in Medicago truncatula
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Regulation of Growth and Flowering in Medicago truncatula

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Physiology and Metabolism".

Deadline for manuscript submissions: closed (30 September 2022) | Viewed by 2872

Special Issue Editor

Prof. Dr. Jiangqi Wen

E-Mail Website
Guest Editor
Department of Plant and Soil Sciences, Institute for Agricultural Biosciences, Oklahoma State University, 3210 Sam Noble Parkway, Ardmore, OK 73401, USA
Interests: legume genomics; plant development; flowering time regulation

Special Issue Information

Dear Colleagues,

Legumes are second only to Gramineae plants, with more than 18,000 species. Legumes are consumed by humans as pulse and by livestock animals as high protein forages, used by farmers as soil-enhancing green manure, and are beneficial to sustainable agriculture and to ecosystems due to their nitrogen-fixing ability. Medicago truncatula is one of the model legumes and has gained increasing attention in recent years because of numerous resources and its amenability in functional genomics. Genome sequencing of two commonly used accessions, A17 and R108, resequencing of 384 HapMap lines, and generation of mutant collections have contributed to a better understanding of growth and development, interaction with microorganisms, responses to biotic and abiotic stresses, and flowering in M. truncatula.

In the current Special Issue, we welcome contributions in form of original articles, reviews, and short communications on recent advances in the areas of growth regulation and flowering time control in M. truncatula.

Dr. Jiangqi Wen
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Plants is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Medicago truncatula
  • growth and development
  • hormonal regulation
  • flowering regulation
  • productivity

Published Papers (1 paper)

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Research

19 pages, 3529 KiB  
Article
A Point Mutation in Phytochromobilin synthase Alters the Circadian Clock and Photoperiodic Flowering of Medicago truncatula
by Soledad Perez-Santangelo, Nathanael Napier, Fran Robson, James L. Weller, Donna M. Bond and Richard C. Macknight
Plants 2022, 11(3), 239; https://doi.org/10.3390/plants11030239 - 18 Jan 2022
Cited by 5 | Viewed by 2420
Abstract
Plants use seasonal cues to initiate flowering at an appropriate time of year to ensure optimal reproductive success. The circadian clock integrates these daily and seasonal cues with internal cues to initiate flowering. The molecular pathways that control the sensitivity of flowering to [...] Read more.
Plants use seasonal cues to initiate flowering at an appropriate time of year to ensure optimal reproductive success. The circadian clock integrates these daily and seasonal cues with internal cues to initiate flowering. The molecular pathways that control the sensitivity of flowering to photoperiods (daylengths) are well described in the model plant Arabidopsis. However, much less is known for crop species, such as legumes. Here, we performed a flowering time screen of a TILLING population of Medicago truncatula and found a line with late-flowering and altered light-sensing phenotypes. Using RNA sequencing, we identified a nonsense mutation in the Phytochromobilin synthase (MtPΦBS) gene, which encodes an enzyme that carries out the final step in the biosynthesis of the chromophore required for phytochrome (phy) activity. The analysis of the circadian clock in the MtpΦbs mutant revealed a shorter circadian period, which was shared with the MtphyA mutant. The MtpΦbs and MtphyA mutants showed downregulation of the FT floral regulators MtFTa1 and MtFTb1/b2 and a change in phase for morning and night core clock genes. Our findings show that phyA is necessary to synchronize the circadian clock and integration of light signalling to precisely control the timing of flowering. Full article
(This article belongs to the Special Issue Regulation of Growth and Flowering in Medicago truncatula)
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