@Article{phyton.2023.025266,
AUTHOR = {Zhishu Jiang, Cong Gan, Yulian Liu, Xiaoli Lin, Limei Peng, Yongping Song, Xiaowei Luo, Jie Xu},
TITLE = {A Novel Dominant Allele from 93-11, <i>ES(4)</i>, Represses Reactive Oxygen Species Scavenging and Leads to Early-Senescence in Rice},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {92},
YEAR = {2023},
NUMBER = {3},
PAGES = {665--677},
URL = {http://www.techscience.com/phyton/v92n3/50570},
ISSN = {1851-5657},
ABSTRACT = {Senescence is the last developmental process in plant, which has an important impact on crop yield and quality. In this study, a stable hereditary early-senescence line BC64 was isolated from the high-generation recombinant inbred lines of 93-11 and Wuyunjing7 (W7). Genetic analysis showed that the premature aging phenotype was controlled by a dominant gene derived from 93-11. By linkage analysis, the gene was primarily mapped in the region between marker B4 and B5 near the centromere of chromosome 4, described as <i>ES(4)</i>. Through multiple backcrossing with W7, the near-isogenic line of <i>ES(4)</i> (NIL-ES(4)) was obtained. Compared with wild-type W7, NIL-ES(4) plants showed more sever senescence phenotype in both nature and dark conditions. In NIL plants, leaves turned yellow at the fully tillering stage; photosynthetic rate, pollen fertility and seed setting rate were decreased. Moreover, the malondialdehyde, proline content and relative conductivity in NIL-ES(4) were significantly higher than those in W7; both transcript level and activities of reactive oxygen species scavenging enzymes were repressed; H<sub>2</sub>O<sub>2</sub> and O<sup>2−</sup> were significantly accumulated. This study provides a basis for further cloning and function identification of <i>ES(4)</i>.},
DOI = {10.32604/phyton.2023.025266}
}