The negative regulatory factor EPP2/SEU built by the plant light form was cloned.

For plants, light and temperature are two very important environmental factors.
plants can accurately perceive the wavelength, intensity, cycle and other parameters of light, and adjust their growth and development according to their changes. similar
, non-coercive ambient high temperature also regulates the growth and development process of plant morphology and flowering.
recent studies have found that plantresponses to light and temperature are conjugated, but only a few proteins have been found to play a role in the integration of the two signals.
therefore, looking for new components of light-temperature signal and constructing and perfecting its signal regulation network is of great scientific significance to the analysis of plant response and adaptation mechanism to light-temperature environment, and also has potential application value in agricultural production.
Lin Rongxian of the Institute of Botany of the Chinese Academy of Sciences has been carrying out long-term research work on optical signal transduction and chlorophyst development, and in recent years has devoted itself to excavating and studying new factors for optical signal transduction.
researchers cloned the ePP1 gene of amoeba, the chromatin remodeling factor PKL of the gene code, which can be built by interacting with a variety of different transcription factors to inhibit the construction of light morphology and regulate the temperature pattern.
recently, researchers cloned the EPP2 gene based on previous work.
the gene encodes a transcription cofactor SEUSS (SEU).
studies have found that EPP2/SEU can respond to light signals such as red light, far red light and blue light, which is a negative regulatory factor built in plant light form, and ePP2/SEU can regulate the physiological reaction of high temperature to the environment (28 degrees C), which is a positive regulatory factor for the construction of temperature pattern. Further research
found that SEU full-length protein has transcription inhibition, but because its C-side has a strong activation ability, not only can interact directly with the key transcription factor PIF4 of light-temperature signal, but also can be combined with multiple promoters involved in growth hormone synthesis and signal transduction gene and activate its expression; SEU binding downstream genes do not depend on PIF4, while PIF4 activation of related genes is dependent on SEU; Mutations in SEU can lead to a significant decrease in growth hormone content, indicating that it affects morphological construction by regulating the synthesis of growth hormone.
the study found a new factor SEU for the integration of light signals and temperature signals, and revealed that SEU, through mutual interaction with PIF4, formed transcription-regulated complex, regulated the target genes associated with growth hormone synthesis and signals, thus changing the content and signaling process of plant growth hormone, realizing the regulation of growth and development, and making plants better adapted to the light-warm environment.
published the results online May 4 in the international academic journal Molecular Plant.
Lin Rongpresents Assistant Researcher Huai Junling and Ph.D. candidate Zhang Xinyu are co-first authors, and Lin Rongcheng is the author of the newsletter.
the study was funded by projects such as the Ministry of Agriculture, the Ministry of Science and Technology and the Fund Committee.
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