OsMADS57 regulates the cold resistance of rice and can be used as a molecular switch to regulate the defense and development mechanism.

The defensive response and the environment shaping of organ development in coordinated response to adversity stress are the basic conditions for plants to adapt to the changing environment in the long-term evolution process.
therefore, the molecular mechanism of plant adaptation to the environment is one of the most important scientific problems in plant science, and also the theoretical basis of plant molecular design.
but the current study on the molecular mechanism of dynamic balance between plant regulation growth and defensive response in adversity is not clear.
recently, the seed kang team of the Institute of Botany of the Chinese Academy of Sciences found that the rice MADS-box transcription factor family OsMADS57, in conjunction with its mutual protein OsTB1, can regulate the low temperature tolerance of rice, with the molecular switching characteristics of balanced organ occurrence and defensive reactions.
Figure 1. OsMADS57 regulates the cold resistance of rice.
(a), normal and low temperature wild DJ and osmads57-1 and osmads57-2 functional acquired and functionally absent mutant phenotypes; (b), expression levels of OsMADS57 in wild DJ and osmads57 mutants; (c), survival rate after hypothermia; (( d), low temperature treatment and recovery of growth after side buds; (e), surface plasma resonance detection normal and low temperature OsTB1 on OsMADS57 combined with OsWRKY94 effect; (f), surface plasma resonance detection normal and low temperature OsMADS57 on osWRKY94 and D14 combination.
Figure 2. OsMADS57 regulates defense and development mechanism ses and regulators as a molecular switch.
the transcription factor OsMADS57 and OsTB1 protein at room temperature interjeclate the transcription of the one-legged golden ester receptor gene D14, promote the differentiation of rice side buds and the formation of fractionation;
study found that OsMADS57 and OsTB1's regulation of cryogenic defense responses relied on their common target gene OsWRKY94.
osMADS57 and OsTB1 protein at room temperature, inhibit the transcription of the one-legged gold-ine receptor gene D14, promote the differentiation of rice side buds and the formation of fractions, while at low temperatures, OsMADS57 and OsTB1 initiate a defensive response by directly activating the transcription of OsWRKY94.
OsMADS57 as a molecular switch to regulate the growth of rice side buds and low temperature tolerance, balance the growth and development of rice and the molecular regulation network of stress response, and control the adaptability of plants to low temperature environment.
this study is helpful to deepen the understanding of how plants regulate growth and development to adapt to the changing external environment, which is of great theoretical significance in rice variety improvement and molecular design and breeding.
research published in The New Phytologist, Ph.D. Chen Liping is the first author of the paper, Chinese Academy of Sciences academician Xiang Kang is the communication author.
the research was funded by the Ministry of Science and Technology, the Chinese Academy of Sciences strategic pilot science and technology project and the China-Australia bilateral "CAS-CSIRO" project.
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