Auxin regulates adventitious root formation in tomato cuttings

Adventitious root (AR) formation is a critical developmental process in cutting propagation for the horticultural industry. While auxin has been shown to regulate this process, the exact mechanism and details preceding AR formation remain unclear. Even though AR and lateral root (LR) formation share common developmental processes, there are exist some differences that need to be closely examined at the cytological level. Tomato stem cuttings, which readily form adventitious roots, represent the perfect system to study the influence of auxin on AR formation and to compare AR and LR organogenesis.https://doi.org/10.1186/s12870-019-2002-

New Germplasm for Breeding: Pink-flowered and White-fruited Strawberry

Most strawberry plants have white flowers and red fruit. We developed a new strawberry selection with pink flowers and white fruit, and named it G23. Basic phenotypic data were recorded over years of observation and experimentation with the flower crown diameter, petal color, and rate of fruit set, as well as fruit skin color, flesh color, seed color and attachment status, fruit weight and shape, soluble solids contents, and firmness. We found that G23 bloomed with a stable pink flower and produced white fruit consistently with a relatively high fruit-set rate compared with its female parent, ‘Pink Panda’. G23 displayed high resistance to Fusarium wilt (Fusarium oxysporum) and anthracnose (Colletotrichum spp.). It is also tolerant of high temperatures (up to 40 °C) and long-term drought. The asexual propagation ability of G23 is high, with ∼60 to 100 stolon ramets formed during the summer. In summary, this new pink-flowered and white-fruited strawberry germplasm is suitable for ornamental use, as a result of its remarkable flowering and fruiting characteristics. In addition, it provides opportunities for innovative strawberry germplasm for future breeding

Identification and expression analysis of LATERAL ORGAN BOUNDARIES DOMAIN (LBD) transcription factor genes in Fragaria vesca

The LATERAL ORGAN BOUNDARIES DOMAIN (LBD) gene family encodes plant-specific transcription factors that play crucial roles in the growth and development in many plant species. However, no systematic study of LBD genes has been conducted in strawberry. In this study, 35 LBD (FvLBD) genes were identified in the diploid woodland strawberry genome (Fragaria vesca). These LBD proteins could be classified into two groups based on the structure of their lateral organ boundaries (LOB) domain. The promoters of FvLBD genes contain different regulatory elements associated with potential response to different environmental stimuli and plant developmental signals. Furthermore, we analysed the expression patterns of the LBD genes during the callus formation in strawberry, and the results suggested that FvLBD16 might play a prominent role in the regulation of callus formation. In addition, we investigated the expression profiles of FvLBD genes during early fruit development based on the transcriptome data. We found that some FvLBD genes show a specific expression pattern. These results indicate that the FvLBD genes may function in the early fruit development. Together, the present study provides insights into possible functions of the FvLBD genes and provides a basis for further functional research of FvLBD proteins.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author

Author Correction: The complexity of the Fragaria x ananassa(octoploid) transcriptome by single-molecule long-read sequencing

Since the publication of this article, the authors have noticed that the part of acknowledgement is missing from article. Here is the acknowledgement

The complexity of the Fragaria x ananassa (octoploid) transcriptome by single-molecule long-read sequencing

Crop genetics: Gene expression during strawberry ripening Researchers in China have identified the genes involved in strawberry ripening. Mizhen Zhao led a team at the Jiangsu Academy of Agricultural Sciences which used long-read sequencing to investigate gene expression during six stages of strawberry fruit development, from small green fruit through whitening to large red fruit. They identified thousands of genes which are activated or repressed during fruit development, including 527 transcription factors – genes which regulate the activity of other genes. The analysis also revealed that genes related to the plant hormone auxin were downregulated in developing fruits, while those related to abscisic acid were upregulated, clarifying the role of the two hormones during strawberry ripening. This work not only provides a high-quality reference transcriptome for future strawberry work but also highlights genes related to ripening for further study