@Article{phyton.2023.026516,
AUTHOR = {Hongxiu Gao, Lin Zhu, Tianqi Liu, Xueyu Leng, Zhenxing Zhu, Wei Xie, Haitao Lv, Zhengxun Jin, Ping Wu, Zhongchen Zhang},
TITLE = {Identification of a Novel <i>OsCYP2</i> Allele that Was Involved in Rice Response to Low Temperature Stress},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {92},
YEAR = {2023},
NUMBER = {6},
PAGES = {1743--1763},
URL = {http://www.techscience.com/phyton/v92n6/52310},
ISSN = {1851-5657},
ABSTRACT = {Cyclophilin (CYP) plays an important role in plant response to stress, and <i>OsCYP2</i>, one gene of cyclophlilin
family, is involved in auxin signal transduction and stress signaling in rice. However, the mechanism that <i>OsCYP2</i>
is involved in rice response to low temperature is still unclear. We identified a new <i>OsCYP2</i> allelic mutant, lrl3,
with fewer lateral roots, and the differences in shoot height, primary root length and adventitious root length
increased with the growth process compared to the wild-type plant. Auxin signaling pathway was also affected
and became insensitive to gravity. The transgenic rice plants with over-expression of <i>OsCYP2</i> were more tolerant
to low temperature than the wild-type plants, suggesting that <i>OsCYP2</i> was involved in the low temperature
response in rice. In addition, <i>OsCYP2</i> negatively regulated the expression of <i>OsTPS38</i>, a terpene synthase gene,
and was dependent on the <i>OsCDPK7</i>-mediated pathway in response to low temperature stress. <i>OsTPS38</i>-
overexpressed transgenic line ox-2 was more sensitive to low temperature. Therefore, <i>OsCYP2</i> may negatively
regulate <i>OsTPS38</i> through an <i>OsCDPK7</i>-dependent pathway to mediate the response to low temperature in rice.
These results provide a new basis for auxin signaling genes to regulate rice response to low temperature stress.},
DOI = {10.32604/phyton.2023.026516}
}