Light limitation inducing overcompensatory growth of cyanobacteria and function of serine/threonine kinase (STK) genes involved
文献类型： 外文期刊
作者： Dai, Wei 1 ; Chen, Gao 2 ; Bi, Xiangdong 1 ; Zhong, Huairong 2 ; Wang, Xueying 1 ; Dong, Shaojie 1 ; Lv, Dong 1 ; Zhang, 1 ;
作者机构： 1.Tianjin Agr Univ, Coll Fishery, Key Lab Aquat Ecol & Aquaculture Tianjin, Tianjin, Peoples R China
2.Shandong Acad Agr Sci, Biotechnol Res Ctr, Jinan, Peoples R China
3.Shandong Prov Key Lab Genet Improvement Ecol & Ph, Jinan, Peoples R China
关键词： compensatory growth; cyanobacteria; light limitation; serine; threonine kinase; spkD
期刊名称：WATER SCIENCE AND TECHNOLOGY （ 影响因子：1.638； 五年影响因子：1.632 ）
ISSN： 0273-1223
年卷期： 2021 年 83 卷 6 期
页码：
收录情况： SCI
摘要： The rapid overcompensatory growth that appears when cyanobacteria are supplied with adequate resources after a period of resource deprivation might contribute to the occurrence of cyanobacterial blooms. We investigated the changing characteristics of overcompensatory growth and serine/threonine kinase (STK) genes expression of cyanobacterium Microcystis aeruginosa in response to light limitation. The results showed M. aeruginosa exhibited overcompensatory growth for 2 days after light recovery, during which the increase in growth was inversely related to light intensity. Expression of STK genes, such as spkD, was upregulated significantly at 0.5-4 h after light recovery (P < 0.05). To investigate the function of STK genes in the overcompensatory growth, M. aeruginosa spkD was heterologously expressed in Synechocystis. Transgenic Synechocystis exhibited greater and longer overcompensatory growth than wild-type Synechocystis after light recovery. Relative expression levels of STK genes in transgenic Synechocystis were significantly higher than those in wild-type Synechocystis at 24 h of light recovery (P < 0.05). Heterologous expression of Microcystis spkD might stimulate overcompensatory growth of Synechocystis by affecting its STK gene expression.
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