Researchers discover the 'KARAPPO' gene and illuminate vegetative reproduction

phys.org | 10/10/2019 | Staff
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The mechanism by which liverwort (Marchantia polymorpha) asexually reproduces via the development of clonal progenies (gemmae) has been revealed by a cross-institutional research group. They discovered the gene "KARAPPO," which is essential for initiating gemma development in liverwort. These findings are expected to contribute fundamental knowledge towards technological developments to boost agricultural and horticultural cultivation efficiency.

The collaborative research team consisted of members from institutions including Kobe University, Kyoto University, the National University of Singapore and the National Institute for Basic Biology, among others. Members from Kobe University's Graduate School of Science included Professor Kimitsuke Ishizaki, Researcher Yukiko Yasui and Takuma Hiwatashi (a third year Ph.D. student).

Results - Study - Journal - Current - Biology

The results of this study were published in the American journal Current Biology on October 10, 2019.

Vegetative reproduction is a form of asexual reproduction in which individual plants are developed directly from the tissues of the parent plant. Liverwort reproduces by forming clones of itself (collectively called gemmae) in a gemma cup (Figure 1). These cups form on the thallus, or body, of the plant. Inside the gemma cup, epidermal cells (that form a protective layer over the outside of a plant) undergo cell elongation followed by two cycles of asymmetrical cell division in order to form a gemma cell and a basal cell. This gemma cell continues to divide before finally forming a new plant.

Bryophytes - Liverworts - Mosses - Hornworts - Land

It is thought that bryophytes (liverworts, mosses, and hornworts) evolved from land plants' algal ancestors more than 430 million years ago. Liverwort was one of the earliest diverging plants to develop characteristics allowing it to live on land. The whole-genome sequence information for...
(Excerpt) Read more at: phys.org
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