Paclobutrazol induces the concurrent accumulation of chrysolaminarin and lipids in the diatom Phaeodactylum tricornutum  

作　　者：Yufeng YANG Yang LU Jianwei ZHENG Dawei LI Xiang WANG Weidong YANG Hongye LI 

机构地区：[1]Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes,College of Life Science and Technology,Jinan University,Guangzhou 510632,China

出　　处：《Journal of Oceanology and Limnology》2023年第5期1809-1820,共12页海洋湖沼学报（英文）

基　　金：Supported by the National Natural Science Foundation of China (Nos.31870027,42006125);the Guangdong Natural Science Foundation (No.2019B1515120062)。

摘　　要：Paclobutrazol is a plant growth regulator and inhibitor of endogenous gibberellin synthesis.It is a powerful inhibitor of vegetative growth by changing the photosynthetic rate and plant hormone levels,thereby affecting plant growth and development.In this study,the effects of paclobutrazol on the model diatom Phaeodactylum tricornutum were investigated.Results show that 2.5-mg/L and 10-mg/L paclobutrazol significantly inhibited the algal growth by inhibiting chlorophyll synthesis,which affects photosynthesis.The antioxidant system,including catalase(CAT)and glutathione peroxidase(GPx)was severely damaged.Chrysolaminarin content was significantly elevated and doubled up to 127 mg/g dry cell weight(DCW)by 10-mg/L paclobutrazol treatment.In combination with transcriptomic analysis,paclobutrazol was demonstrated to play a regulatory role in the accumulation of chrysolaminarin and neutral lipids.

关 键 词：chrysolaminarin LIPID PACLOBUTRAZOL DIATOM 

分 类 号：Q945[生物学—植物学]