The mechanism that controls Chinese cabbage flowering

phys.org | 11/7/2011 | Staff
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Chinese cabbage is part of a crop family that must be exposed to cold temperatures for a particular period of time in order to flower. Scientists have succeeded in comprehensively identifying the long noncoding ribonucleic acids (IncRNAs) that are expressed when Chinese cabbage is temporarily exposed to cold temperatures for four weeks. LncRNAs that are known to be involved in responding to cold in Arabidopsis thaliana do not exist in Chinese cabbage, which suggests that Chinese cabbage has its own independent mechanism for flowering.

The research team was led by Namiko Nishida (Kobe University Graduate School of Agricultural Science) and Daniel Shea (Niigata University Graduate School of Science and Technology). The team also included Associate Professor Ryo Fujimoto (Kobe University Graduate School of Agricultural Science), Professor Keiichi Okazaki (Niigata University Graduate School of Science and Technology), Team Leader Motoaki Seki (RIKEN Center for Sustainable Resource Science), members of Japan's National Agriculture and Food Research Organization (NARO) and Australia's Commonwealth Scientific and Industrial Research Organisation. The findings were published on June 26 in the online edition of Scientific Reports.

RNAs - Lack - Information - Proteins - RNAs

Non-coding RNAs lack the information needed to create proteins. These noncoding RNAs are classified into small RNAs (around 20 nucleotides long) and long noncoding RNAs (IncRNAs, over 200 nucleotides long). LncRNAs are expressed in most plants, with tens of thousands known to be expressed in the model plant A. thaliana.

LncRNAs have been linked to the phenomenon of vernalization: when plants need to be exposed to a period of cold treatment in order to flower. This phenomenon can be seen in many subspecies of Brassica rapa L. including the Chinese cabbage, which grows during winter to bloom in spring (Figure 1).

Research - Team - RNAs - Cabbage - Weeks

The research team extracted total RNAs from Chinese cabbage leaves cultivated for two weeks at 22°C and Chinese...
(Excerpt) Read more at: phys.org
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