Impact of the potassium transporter TaHAK18 on wheat growth and potassium uptake under stressful K+ conditions
Copyright © 2025 Elsevier GmbH. All rights reserved.
| Publié dans: | Journal of plant physiology. - 1979. - 307(2025) vom: 27. Apr., Seite 154459 |
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| Auteur principal: | |
| Autres auteurs: | , , , , , , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2025
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| Accès à la collection: | Journal of plant physiology |
| Sujets: | Journal Article Low-K(+) stress Potassium transporter TaHAK18 Wheat Potassium RWP5GA015D Plant Proteins Cation Transport Proteins |
| Résumé: | Copyright © 2025 Elsevier GmbH. All rights reserved. Potassium (K), an indispensable nutrient for plant growth and development, plays a crucial role in plant stress resistance. Within the K+ regulatory network in plants, the HAK/KUP/KT gene family comprises a dominant group of K+ transport proteins responsible for K+ uptake and transport. This study functionally characterized the wheat gene TaHAK18, which encodes a putative K+ transporter. Plasma membrane-localized TaHAK18 was significantly upregulated under low-K+ conditions and showed tissue-specific expression, being most abundant in leaves. A functional analysis in yeast demonstrated that TaHAK18 complements K+-uptake deficiencies, confirming its role in K+ transport. Arabidopsis plants overexpressing TaHAK18 experienced enhanced growth under both low- and normal-K+ conditions, with greater fresh weight, lateral root formation, and primary root length. Barley stripe mosaic virus-mediated gene silencing in wheat revealed that TaHAK18 is instrumental for K+ accumulation and plant growth under low-K+ stress. TaHAK18 has the capacity to enhance the growth and the accumulation of K+ in transgenic rice plants. These results indicated that TaHAK18 is a key regulator of K+ uptake and homeostasis in wheat, with potential implications for improving plant tolerance to low-K+ stress |
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| Description: | Date Completed 10.05.2025 Date Revised 10.05.2025 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1618-1328 |
| DOI: | 10.1016/j.jplph.2025.154459 |