lsolation and expression analysis of NtCHS6, a new chalcone synthase gene from Nicotiana tabacum

CHEN Shuai; ZHANG Yin-chao; PAN Xu-hao; LI Yi-ting; CUI Li-jie; WU Feng-yan; CAO Mo-ju; YANG Ai-guo; PAN Guang-tang

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lsolation and expression analysis of NtCHS6, a new chalcone synthase gene from Nicotiana tabacum

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Chalcone synthases (CHS, EC 2.3.1.74) are key enzymes that catalyze the first committed step in flavonoid biosynthesis.In this study, we isolated a chalcone synthase, named NtCHS6, from Nicotiana tabacum. This synthase shared high homology with the NSCHSL (Y14507) gene and contained most of the conserved active sites that are in CHS proteins. The phylogenetic analysis suggested that NtCHS6 protein shared a large genetic distance with other Solanaceae CHS proteins and was the most closely-related to an uncharacterized CHS from Solanum lycopersicum. The expression analysis indicated that NtCHS6 was abundantly expressed in leaves, especially in mature leaves. By scrutinizing its upstream promoter sequences, multiple cis-regulatory elements involved in light and drought responsive were detected. Furthermore, NtCHS6 expression decreased significantly under dark treatment and increased significantly under drought stress. Our results suggested that NtCHS6 expression exhibited both light responsiveness and drought responsiveness, and might play important roles in ultraviolet protection and drought tolerance.

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《农业科学学报（英文版）》 |2017年第7期|1443-1450|共8页
作者
CHEN Shuai; ZHANG Yin-chao; PAN Xu-hao; LI Yi-ting; CUI Li-jie; WU Feng-yan; CAO Mo-ju; YANG Ai-guo; PAN Guang-tang;
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Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, P.R.China;

Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, P.R.China;

Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, P.R.China;

Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, P.R.China;

Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, P.R.China;

Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, P.R.China;

Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, P.R.China;

Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, P.R.China;

Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, P.R.China;

Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, P.R.China;

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lsolation and expression analysis of NtCHS6, a new chalcone synthase gene from Nicotiana tabacum

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