Comparative transcriptome analyses reveal insights into catkin bloom patterns in pecan protogynous and protandrous cultivars.

Autor: Rhein HS; Molecular Biology Program, New Mexico State University, Las Cruces, New Mexico, United States of America., Sreedasyam A; HudsonAlpha Institute for Biotechnology, Huntsville, Alabama, United States of America., Cooke P; Microscopy Core Facility, New Mexico State University, Las Cruces, New Mexico, United States of America., Velasco-Cruz C; Department of Entomology, Plant Pathology, and Weed Science, New Mexico State University, Las Cruces, New Mexico, United States of America., Grimwood J; HudsonAlpha Institute for Biotechnology, Huntsville, Alabama, United States of America., Schmutz J; HudsonAlpha Institute for Biotechnology, Huntsville, Alabama, United States of America., Jenkins J; HudsonAlpha Institute for Biotechnology, Huntsville, Alabama, United States of America., Kumar S; Department of Computer Science, New Mexico State University, Las Cruces, New Mexico, United States of America., Song M; Department of Computer Science, New Mexico State University, Las Cruces, New Mexico, United States of America., Heerema RJ; Departments of Plant and Environmental Sciences and Extension Plant Sciences, Las Cruces, New Mexico, United States of America., Grauke LJ; USDA ARS Pecan Breeding and Genetics, Somerville, Texas, United States of America., Randall JJ; Molecular Biology Program, New Mexico State University, Las Cruces, New Mexico, United States of America.; Department of Entomology, Plant Pathology, and Weed Science, New Mexico State University, Las Cruces, New Mexico, United States of America.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2023 Feb 16; Vol. 18 (2), pp. e0281805. Date of Electronic Publication: 2023 Feb 16 (Print Publication: 2023).
DOI: 10.1371/journal.pone.0281805
Abstrakt: In perennial plants such as pecan, once reproductive maturity is attained, there are genetic switches that are regulated and required for flower development year after year. Pecan trees are heterodichogamous with both pistillate and staminate flowers produced on the same tree. Therefore, defining genes exclusively responsible for pistillate inflorescence and staminate inflorescence (catkin) initiation is challenging at best. To understand these genetic switches and their timing, this study analyzed catkin bloom and gene expression of lateral buds collected from a protogynous (Wichita) and a protandrous (Western) pecan cultivar in summer, autumn and spring. Our data showed that pistillate flowers in the current season on the same shoot negatively impacted catkin production on the protogynous 'Wichita' cultivar. Whereas fruit production the previous year on 'Wichita' had a positive effect on catkin production on the same shoot the following year. However, fruiting the previous year nor current year pistillate flower production had no significant effect on catkin production on 'Western' (protandrous cultivar) cultivar. The RNA-Seq results present more significant differences between the fruiting and non-fruiting shoots of the 'Wichita' cultivar compared to the 'Western' cultivar, revealing the genetic signals likely responsible for catkin production. Our data presented here, indicates the genes showing expression for the initiation of both types of flowers the season before bloom.
Competing Interests: The authors have declared that no competing interests exist.
(Copyright: This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication.)
Databáze: MEDLINE
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