Transcriptome Analysis in Chinese Cabbage (Brassica rapa ssp. pekinensis) Provides the Role of Glucosinolate Metabolism in Response to Drought Stress

Although drought stress is one of the most limiting factors in growth and production of Chinese cabbage ( L. ssp. pekinensis), the underlying biochemical and molecular causes are poorly understood. In the present study, to address the mechanisms underlying the drought responses, we analyzed the tran...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2018-05, Vol.23 (5), p.1186
Main Authors: Eom, Seung Hee, Baek, Seung-A, Kim, Jae Kwang, Hyun, Tae Kyung
Format: Article
Language:English
Subjects:
Acclimation
Acclimatization
Brassica oleracea
Brassica rapa
Chinese cabbage
Drought
Drought resistance
Gene expression
Genes
Glucosinolates
Leaves
Limiting factors
Metabolism
Molecular chains
Molecular modelling
Stomata
Stress
Water loss
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Summary:Although drought stress is one of the most limiting factors in growth and production of Chinese cabbage ( L. ssp. pekinensis), the underlying biochemical and molecular causes are poorly understood. In the present study, to address the mechanisms underlying the drought responses, we analyzed the transcriptome profile of Chinese cabbage grown under drought conditions. Drought stress transcriptionally activated several transcription factor genes, including / , , and , and was found to possibly result in transcriptional variation in genes involved in organic substance metabolic processes. In addition, comparative expression analysis of selected under different stress conditions suggested that drought-induced BrbZIPs are important for improving drought tolerance. Further, drought stress in Chinese cabbage caused differential acclimation responses in glucosinolate metabolism in leaves and roots. Analysis of stomatal aperture indicated that drought-induced accumulation of glucosinolates in leaves directly or indirectly controlled stomatal closure to prevent water loss, suggesting that organ-specific responses are essential for plant survival under drought stress condition. Taken together, our results provide information important for further studies on molecular mechanisms of drought tolerance in Chinese cabbage.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules23051186