1. Transcriptome analysis reveals the tolerant mechanisms to cobalt and copper in barley.
- Author
-
Lwalaba JLW, Zvobgo G, Gai Y, Issaka JH, Mwamba TM, Louis LT, Fu L, Nazir MM, Ansey Kirika B, Kazadi Tshibangu A, Adil MF, Sehar S, Mukobo RP, and Zhang G
- Subjects
- Adaptation, Physiological physiology, Cobalt metabolism, Copper toxicity, Gene Expression Profiling, Gene Expression Regulation, Plant, Genotype, Hordeum drug effects, Hordeum genetics, Hydroponics, Photosynthesis drug effects, Plant Growth Regulators metabolism, Stress, Physiological, Transcription Factors genetics, Transcriptome, Cobalt toxicity, Copper metabolism, Hordeum physiology
- Abstract
Cobalt (Co) and copper (Cu) co-exist commonly in the contaminated soils and at excessive levels, they are toxic to plants. However, their joint effect and possible interaction have not been fully addressed. In this work, a hydroponic experiment was performed to investigate the combined effects of Co and Cu on two barley genotypes at transcriptional level by RNA-seq analysis. The results identified 358 genes inclusively expressed in both genotypes under single and combined treatments of Co and Cu, with most of them being related to metal transport, stress response and transcription factor. The combined treatment induced more differently expressed genes (DEGs) than the single treatment, with Yan66, a metal tolerant genotype having more DEGs than Ea52, a sensitive genotype. The pathways associated with anthocyanin biosynthesis, MAPK signaling, glutathione biosynthesis, phenylalanine metabolism, photosynthesis, arginin biosynthesis, fatty acid elongation, and plant hormone signal transduction biosynthesis were induced and inhibited in Yan66 and Ea52, respectively. Furthermore, flavonoid biosynthesis was much more largely enhanced and accordingly more free flavonoid components (naringin, narirutin and neohesperidin) were accumulated in Yan66 than in Ea52. It may be suggested that high tolerance to both Co and Cu in Yan66 is attributed to its high gene regulatory ability., (Copyright © 2020 The Authors. Published by Elsevier Inc. All rights reserved.)
- Published
- 2021
- Full Text
- View/download PDF