Expression of Three Putative Early Light-Induced Genes Under Different Stress Conditions in the Green Alga Ulva linza
文献类型: 外文期刊
作者: Zhang, Xiaowen 1 ; Cao, Shaona 3 ; Li, Youxun 2 ; Mou, Shanli 1 ; Xu, Dong 1 ; Fan, Xiao 1 ; Ye, Naihao 1 ;
作者机构: 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China
2.Natl Oceanog Ctr, Qingdao 266071, Peoples R China
3.Qingdao Agr Univ, Qingdao 266109, Peoples R China
4.SOA, Key Lab Marine Bioact Subst, Inst Oceanog 1, Qingdao 266061, Peoples R China
关键词: Ulva linza;ELIP-like;Expression analysis;Photoprotection
期刊名称:PLANT MOLECULAR BIOLOGY REPORTER ( 影响因子:1.595; 五年影响因子:2.042 )
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收录情况: SCI
摘要: Ulva linza is a photophilous alga commonly distributed in shallow and horizontal habitats, and it is also a major contributor to biofouling. Early light-induced protein (ELIP) is a stress-related member of the light-harvesting complex family that is part of the photoprotective mechanism in land plants. In this study, we identified three ELIP-like genes in U. linza and analyzed their messenger RNA (mRNA) levels under different stress conditions. Expression of the ELIP-like1 and ELIP-like2 genes was light triggered, and the amount of ELIP-like2 transcripts increased in a light intensity-dependent manner. The mRNA levels of ELIP-like2 significantly increased, reached a maximum within 1 h after the transfer from low-intensity light to high-intensity light, and then rapidly returned to a low level. The amount of ELIP-like1 transcripts was maintained during the first 2 h after the transfer from low light to high light and then declined. The accumulation of ELIP-like1 and ELIP-like2 transcripts was also triggered by exposure to cold temperature and low osmotic stresses. In contrast, different light intensities had little effect on the response of the ELIP-like3 gene, and the transfer from low light to high light caused a decrease in the mRNA levels in a manner similar to that seen for major light-harvesting genes. Furthermore, none of the stress conditions tested resulted in up-regulation of the expression of ELIP-like3. These results suggest that ELIP-like1 and ELIP-like2 may participate in photoprotection in U. linza under high light, cold temperature, and low osmotic stress conditions. However, ELIP-like3 acted more like a structural component of the photosynthetic membranes.
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