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Int. J. Mol. Sci. 2017, 18(12), 2668; doi:10.3390/ijms18122668

The Discrepant and Similar Responses of Genome-Wide Transcriptional Profiles between Drought and Cold Stresses in Cassava

Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
These authors contributed equally in this work.
Author to whom correspondence should be addressed.
Received: 14 November 2017 / Revised: 4 December 2017 / Accepted: 6 December 2017 / Published: 12 December 2017
(This article belongs to the Section Molecular Botany)
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Background: Cassava, an important tropical crop, has remarkable drought tolerance, but is very sensitive to cold. The growth, development, and root productivity of cassava are all adversely affected under cold and drought. Methods: To profile the transcriptional response to cold and drought stresses, cassava seedlings were respectively subjected to 0, 6, 24, and 48 h of cold stress and 0, 4, 6, and 10 days of drought stress. Their folded leaves, fully extended leaves, and roots were respectively investigated using RNA-seq. Results: Many genes specifically and commonly responsive to cold and drought were revealed: genes related to basic cellular metabolism, tetrapyrrole synthesis, and brassinosteroid metabolism exclusively responded to cold; genes related to abiotic stress and ethylene metabolism exclusively responded to drought; and genes related to cell wall, photosynthesis, and carbohydrate metabolism, DNA synthesis/chromatic structure, abscisic acid and salicylic acid metabolism, and calcium signaling commonly responded to both cold and drought. Discussion: Combined with cold- and/or drought-responsive transcription factors, the regulatory networks responding to cold and drought in cassava were constructed. All these findings will improve our understanding of the specific and common responses to cold and drought in cassava, and shed light on genetic improvement of cold and drought tolerance in cassava. View Full-Text
Keywords: cassava; cold; drought; gene regulation; common response; specific response cassava; cold; drought; gene regulation; common response; specific response

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Zeng, C.; Ding, Z.; Zhou, F.; Zhou, Y.; Yang, R.; Yang, Z.; Wang, W.; Peng, M. The Discrepant and Similar Responses of Genome-Wide Transcriptional Profiles between Drought and Cold Stresses in Cassava. Int. J. Mol. Sci. 2017, 18, 2668.

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