文献类型：期刊文献

英文题名：LaDAL1 Coordinates Age and Environmental Signals in the Life Cycle of Larix kaempferi

作者：Li, Xiang-Yi[1] Ye, Zha-Long[1] Cheng, Dong-Xia[1] Zang, Qiao-Lu[1] Qi, Li-Wang[1] Li, Wan-Feng[1]

通信作者：Li, WF[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat,Natl Forestry & G, Beijing 100091, Peoples R China

年份：2023

卷号：24

期号：1

外文期刊名：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000909271200001)】；

语种：英文

外文关键词：age; larch; life cycle; MADS; perennial; transgeneration

摘要：Perennial woody plants are long-lived, and their life-cycle events occur in order in each generation, but what drives the occurrence and restart of these events in their offspring is unknown. Based on its age-dependent expression pattern and function, Larix kaempferi DEFICIENS-AGAMOUS-LIKE 1 (LaDAL1), a MADS transcription factor has been suggested to be a time recorder and life-cycle event coordinator. Here, we studied the dynamic spatiotemporal expression pattern of LaDAL1 in the life cycle of L. kaempferi to analyze the molecular mechanism of life-cycle progression. In full view of the life cycle, LaDAL1 transcription was related with life-cycle progression, and its transcript level increased sharply from age 3 to 5 years, which might be the molecular characteristic of the vegetative phase change, and then stayed at a high level. During sexual reproduction, LaDAL1 transcript level decreased sequentially during meiosis and embryogenesis, suggesting that meiosis rapidly lowers the age signal, and after fertilization, the age signal was reset to "0" with the embryogenesis. When a seed germinates, the next generation restarts, and the age is re-counted. Altogether, these results not only provide important and novel insights into the life-cycle progression and transgeneration in perennial woody plants, but also advance our understanding of age recording.