生长素
脱落酸
水杨酸
类胡萝卜素
转录组
生物化学
吲哚-3-乙酸
植物激素
茉莉酸甲酯
生物
茉莉酸
拟南芥
信号转导
细胞生物学
植物
基因
基因表达
突变体
作者
Faisal Alsenani,Taylor J. Wass,Ruijuan Ma,Eladl Eltanahy,M. Netzel,Peer M. Schenk
标识
DOI:10.1016/j.algal.2018.12.002
摘要
Microalgae are a commercially viable route for the production of carotenoids. Chlorella sp. BR2 was treated with plant hormones indole‑3‑acetic acid, salicylic acid, abscisic acid and methyl jasmonate and screened for enhanced carotenoid production. Indole‑3‑acetic acid was the only hormone with an inductive effect on carotenoid accumulation. As such, transcriptome-wide changes following auxin treatment were profiled using RNA-Seq and expressed sequences reconstructed with de novo assembly. This revealed the active pathway components of auxin-induced carotenogenesis. Data analysis specified the differentially expressed genes involved in auxin biosynthesis and signal transduction, which hint at close, yet unique relationship to equivalent pathways in higher plants. Unlike in plants, the ancient ABP1/SCFSKP2A/IBR5-mediated pathways for auxin response likely acted as the primary signaling route in Chlorella. As carotenoids are precursors for abscisic acid and antagonists of reactive oxygen species, the findings suggest a potential link between auxin signaling and abiotic stress tolerance.
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