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Promoter of Cassava Responds to Diverse Abiotic Stresses and Hormone Signals in Transgenic . | LitMetric

Promoter of Cassava Responds to Diverse Abiotic Stresses and Hormone Signals in Transgenic .

Int J Mol Sci

National Key Laboratory for Tropical Crop Breeding, Sanya Research Institute, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China.

Published: July 2024

The AT-hook motif nuclear-localized () family is pivotal for the abiotic stress response in plants. However, the function of the cassava genes has not been elucidated. Promoters, as important regulatory elements of gene expression, play a crucial role in stress resistance. In this study, the promoter of the cassava gene was cloned. The MeAHL31 protein was localized to the cytoplasm and the nucleus. qRT-PCR analysis revealed that the gene was expressed in almost all tissues tested, and the expression in tuber roots was 321.3 times higher than that in petioles. Promoter analysis showed that the promoter contains drought, methyl jasmonate (MeJA), abscisic acid (ABA), and gibberellin (GA) -acting elements. Expression analysis indicated that the gene is dramatically affected by treatments with salt, drought, MeJA, ABA, and GA3. Histochemical staining in the transgenic corroborated that the GUS staining was found in most tissues and organs, excluding seeds. Beta-glucuronidase (GUS) activity assays showed that the activities in the transgenic were enhanced by different concentrations of NaCl, mannitol (for simulating drought), and MeJA treatments. The integrated findings suggest that the promoter responds to the abiotic stresses of salt and drought, and its activity is regulated by the MeJA hormone signal.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11276720PMC
http://dx.doi.org/10.3390/ijms25147714DOI Listing

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