2022
DOI: 10.3390/ijms23020686
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A Novel WRKY Transcription Factor from Ipomoea trifida, ItfWRKY70, Confers Drought Tolerance in Sweet Potato

Abstract: WRKY transcription factors are one of the important families in plants, and have important roles in plant growth, abiotic stress responses, and defense regulation. In this study, we isolated a WRKY gene, ItfWRKY70, from the wild relative of sweet potato Ipomoea trifida (H.B.K.) G. Don. This gene was highly expressed in leaf tissue and strongly induced by 20% PEG6000 and 100 μM abscisic acid (ABA). Subcellar localization analyses indicated that ItfWRKY70 was localized in the nucleus. Overexpression of ItfWRKY70… Show more

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Cited by 26 publications
(21 citation statements)
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“…SR is the main nutritional and edible organ, and directly determines the quality and quantity of sweetpotato [ 29 ]. However, SR expansion is a complex physiological process that is affected by many factors, including internal and external environments.…”
Section: Discussionmentioning
confidence: 99%
“…SR is the main nutritional and edible organ, and directly determines the quality and quantity of sweetpotato [ 29 ]. However, SR expansion is a complex physiological process that is affected by many factors, including internal and external environments.…”
Section: Discussionmentioning
confidence: 99%
“…The overexpressed transgenic lines, RNAi transgenic lines, and WT were treated with 150 mmol·L −1 NaCl, and the control group was cultured in water for 12 h. qRT-PCR was used to detect the expression levels of related resistance genes in the leaves of wild-type and transgenic plants under salt stress with gene-specific primers [ 60 ] ( Supplementary Table S2 ).…”
Section: Methodsmentioning
confidence: 99%
“…WRKYs participate in the signal transduction processes responding to stresses by binding to the WRKY binding sites (W-boxes, C/TTGACC/T) in the promoters of the defense-related genes and could be regulated by ABA ( Eulgem and Somssich, 2007 ; Yang et al, 2016 ). Several studies have proved that WRKYs are key links in ABA signaling networks and play crucial roles in plant responses to different stresses by maintaining ROS homeostasis ( Chen et al, 2010 ; Rushton et al, 2012 ; Sun et al, 2022 ). For instance, the overexpression of ZmWRKY4 in maize ( Zea mays ) increased the levels and activities of SOD and APX, while the RNAi of ZmWRKY4 inhibited the increase of SOD and APX expression levels and activities induced by ABA, suggesting that ZmWRKY4 was necessary for ABA regulating antioxidant enzyme systems under stress ( Hong et al, 2016 ).…”
Section: Abscisic Acid Enhances CD Tolerance By Regulating Antioxidan...mentioning
confidence: 99%